In the following publications within CHARMEC are listed. The list covers work until  June 2008.

The aim is to place the papers in connection to their main project. However, some projects are closely interacting. Consequently, some publications may appear in connection to several projects. Further, the same paper may be present in different stages of its preparation.

Contents

• Publications within CHARMEC 1995-2004
  • TS1. Calculation model of track structures
  • TS2. Railhead corrugation formation
  • TS3. Sleeper and rail pad dynamics
  • TS4. Lateral track dynamics
  • TS5. Out-of-round wheels - causes and consequences
  • TS6. Identification of dynamic forces in trains
  • TS7. Dynamics of track switches
  • TS8. Integrated track dynamics
  • TS9. Track dynamics and sleepers
  • TS10. Track response when using Under Sleeper Pads (USP)
  • TS11. Rail corrugation growth on curves
  • TS12. Identification of wheel/rail contact forces
  • VB1. Structural vibrations from railway traffic
  • VB2. Noise from tread-braked railway wheels
  • VB3. Noise rig
  • VB4. Vibrations and external noise from train and track
  • VB5. Wave propagation under high-speed trains
  • VB6. Interaction of train, soil and buildings
  • VB7. Vibration transmission in railway vehicles
  • VB8. Ground vibrations from railways
  • VB9. Dynamics of railway systems
  • VB10. External noise generation from trains
  • MU1. Mechanical properties of ballast
  • MU2. New materials in wheels and rails
  • MU3. Martensite formation and damage around railway wheel flats
  • MU4. Prediction of life-time of railway wheels
  • MU5. Mechanical properties of concrete sleepers
  • MU6. Rolling contact fatigue of rails
  • MU7. Laser treatment of wheels and rails
  • MU8. Butt-welding of rails
  • MU9. Rolling contact fatigue of railway wheels
  • MU10. Crack propagation in railway wheels
  • MU11. Early crack growth in rails
  • MU12. Contact and crack mechanics for rails
  • MU13. Wheel and rail materials at low temperatures
  • MU14. Damage in track switches
  • MU15. Microstructural development during laser coating
  • MU16. Alternative materials for wheels and rails
  • MU17. Elastoplastic crack propagation in rails
  • MU18. Wheels and rails at high speeds and axle loads
  • MU19. -
  • MU20. Wear impact on RCF of rails
  • MU21. Thermal impact on RCF of wheels
  • MU22. Improved criterion for surface initiated RCF
  • MU23. Material behaviour at rapid thermal processes
  • MU24. High-strength steels for rails
  • SD1. Braking of freight trains - a systems approach
  • SD2. Sonar pulses for braking control - a prestudy
  • SD3. Computer control of braking systems for freight trains
  • SD4. Control of block braking
  • SD5. Active and semi-active systems in railway vehicles
  • SD6. Adaptronics for bogies and other railway components
  • SD7. -
  • SD8. Wear of disc brakes and block brakes
  • EU1. EuroSABOT
  • EU2. Silent Freight
  • EU3. Silent Track
  • EU4. ICON
  • EU5. EuroBALT II
  • EU6. HIPERWHEEL
  • EU7. INFRASTAR
  • EU8. ERS
  • EU9. EURNEX
  • EU10. INNOTRACK
  • Special projects (SP)
  • Support research
  • Surveys and popular reports and articles
  • Miscellaneous
• Railway Engineering Research at the Division of Solid Mechanichs, Chalmers 1988-1995
  • Wheels, Axles and Brakes - published papers and reports 1988-1995
    • Research
    • Student reports
  • Train/track interaction - published papers and reports
    • Research papers with Abstracts
    • Articles and reports
    • Student reports

Publications within CHARMEC since 1995

The code at the heading relates to CHARMEC's programme areas, see the research section.

TS1. Calculation model of track structures

Tore Dahlberg: Vertical dynamic train/track interaction - verifying a theoretical model by full-scale experiments, Proceedings of the 3rd Herbertov Workshop on Interaction of Railway Vehicles with the Track and Its Substructure, Herbertov, Czech Republic, September 19-23, 1994. Published as supplement to Vehicle System Dynamics, vol 24, 1995, pp 45-57

Mikael Fermér and Jens Nielsen: Vertical interaction between train and track with soft and stiff railpads - full-scale experiments and theory, Proceedings IMechE, Part F: Journal of Rail and Rapid Transit, vol 209, no F1, 1995, pp 39-47

Andrew Peplow, Johan Oscarsson and Tore Dahlberg: Review of research on ballast as track substructure, Chalmers Solid Mechanics, Report F189, Gothenburg 1996, 39 pp

Johan Oscarsson and Tore Dahlberg: Dynamic train/track/ballast interaction - computer models and full-scale experiments, Proceedings 15th IAVSD Symposium Dynamics of Vehicles on Roads and Tracks, Budapest, August 25-29, 1997, 12 pp (in press)

Thomas Broberg, Patrik Johansson, Per Anders Jönsson, Stefan Larsson and Ulf Lång: Railway track vibrations - a benchmark test and a sleeper vibration study, Student Report, Chalmers Solid Mechanics, Gothenburg 1995, 46 pp

Ulf Mårtensson: Railway crossing vibrations, Student Report T138, Chalmers Solid Mechanics, Gothenburg 1996, 27 pp

Johan Ivarsson and Anders Johansson: Finite element model of a railway turnout, Student Report T144, Chalmers Solid Mechanics, Gothenburg 1996, 70 pp

Clas Andersson: Railway turnout vibrations, MSc Thesis EX 1997:1, Chalmers Solid Mechanics, Gothenburg 1997, 53 pp

Tore Dahlberg and Clas Andersson: Vibration due to a wheelset passing a railway turnout crossing, Proceedings WCRR´97 (World Congress on Railway Research), Florence, Italy, November 1997, vol E (Environment), pp 413-419

Annika Igeland and Johan Oscarsson: Modelling of railway track for computer simulation of dynamic train/track interaction, Proceedings XVth IMAC (International Modal Analysis Conference), Tokyo, September 1997, pp 464-470

Johan Oscarsson, Jens Nielsen and Annika Igeland: Dynamic train/track interaction - theory and full-scale experiments, Proceedings WCRR´97 (World Congress on Railway Research), Florence, Italy, November 1997, vol B (Infrastructure and Track), pp 123-129

Johan Oscarsson and Tore Dahlberg: Dynamic train/track/ballast interaction - computer models and full-scale experiments, Proceedings 15th IAVSD Symposium - Dynamics of Vehicles on Roads and Tracks, Budapest (Hungary) August 1997, pp 73-84. Also in Vehicle System Dynamics, vol 29, 1998, pp 73-84

Clas Andersson and Tore Dahlberg: Wheel/rail impacts at a railway turnout crossing, IMechE Journal of Rail and Rapid Transit, vol 212, no F2, 1998, pp 123-134

Johan Oscarsson: Dynamic train/track/ballast interaction - linear and state-dependent track models, Licentiate Thesis 1999:3, Chalmers Solid Mechanics, Gothenburg March 1999, 66 pp

Clas Andersson and Johan Oscarsson: Dynamic train/track interaction including state-dependent track properties and flexible vehicle components, Proceedings 16th IAVSD Symposium - Dynamics of Vehicles on Roads and Tracks, Pretoria (South Africa) August-September 1999, pp 11-14. Full-length paper in Vehicle System Dynamics, vol 33, 2000, pp 47-58

Johan Oscarsson: Dynamic train-track interaction - linear and non-linear track models with property scatter, Doctoral Dissertation, Chalmers Solid Mechanics, Gothenburg April 2001, 130 pp (summary and five appended papers)

Mikael Hallqvist: Track/vehicle simulation with explicit  FE-code, MSc Thesis EX 2000:5, Chalmers Solid Mechanics, Gothenburg March 2000, 58 pp

Johan Oscarsson: Dynamic train-track interaction – linear  and non-linear track models with property scatter, Doctoral Dissertation, Chalmers Solid Mechanics, Gothenburg April 2001, 130 pp (summary and five appended papers)

Johan Oscarsson: Dynamic train-track interaction – variability attributable to scatter in the track properties, Vehicle System Dynamics, vol 37, no 1, 2002, pp 59-79

Johan Oscarsson: Simulation of train-track interaction with stochastic track properties, Vehicle System Dynamics, vol 37,  no 6, 2002, pp 449-469

Johan Oscarsson: Dynamic train-track-ballast interaction with unevenly distributed track properties, Vehicle System Dynamics, vol 37, supplement, 2002, pp 385-396

Jens Nielsen and Johan Oscarsson: Simulation of dynamic  train-track interaction with state-dependent track properties, Journal of Sound and Vibration (accepted for publication)

TS2. Railhead corrugation formation

Jens Nielsen and Annika Igeland: Vertical dynamic interaction between train and track - influence of wheel and track imperfections, Journal of Sound and Vibration, vol 187, no 5, 1995, pp 825-839

Annika Igeland: Time domain solution of the dynamic interaction between railroad structures and moving loads, The Third International Congress on Industrial and Applied Mathematics, ICIAM/GAMM95, Hamburg, July 1995. Published in ZAMM (Zeitschrift für Angewandte Mathematik und Mechanik), vol 76, supplement 4, 1996, pp 137-140

Annika Igeland: Dynamic train/track interaction - parametric study and comparisons with full-scale experiments, Engineering Foundation Conference Vehicle-Infrastructure Interaction IV, San Diego CA, June 2-7, 1996, 14 pp

Annika Igeland and Heike Ilias: Railhead wear calculations based on high frequency wheelset/track interaction - a comparison between different models, Proceedings 2nd MiniConference on Contact Mechanics and Wear of Rail/Wheel Systems, Budapest, July 1996, pp 304-314

Annika Igeland: Railhead corrugation growth explained by dynamic interaction between track and bogie wheelsets, Proceedings IMechE, Part F: Journal of Rail and Rapid Transit, vol 210, no F1, 1996, pp 11-20

Annika Igeland: Railhead wear calculations based on high frequency vehicle/track interaction, Chalmers Solid Mechanics, Report F196, Gothenburg 1996, 9 pp

Annika Igeland and Heike Ilias: Railhead corrugation growth predictions based on non-linear high frequency vehicle/track interaction, Wear, vol 213, 1997, pp 90-97

Annika Igeland: Dynamic train/track interaction - simulation of railhead corrugation growth under a moving bogie using mathematical models combined with full-scale measurements, Doctoral Dissertation, Chalmers Solid Mechanics, Gothenburg 1997 (summary and five appended papers)

TS3. Sleeper and rail pad dynamics

Åsa Fenander: Modal synthesis when modeling damping by use of fractional derivatives, AIAA Journal, vol 34, no 5, 1996, pp 1051-1058

Tore Dahlberg, Jan Köhler and Åsa Fenander: Ett järnvägsspårs dynamiska egenskaper - Gåsakullamätningarna 1995 (in Swedish). Seminarium Samverkan Fordon - Bana, VTI, Linköping, April 18-19, 1996, 11 pp

Åsa Fenander: Fractional derivatives in damping descriptions, ESA International Workshop on Advanced Mathematical Methods in the Dynamics of Flexible Bodies, Noordwijk NL, June 3-5, 1996, 8 pp

Mikael Enelund, Åsa Fenander and Peter Olsson: Fractional integral formulation of constitutive equations of viscoelasticity, AIAA Journal, vol 35, no 8, 1997, pp 1356-1362

Åsa Fenander: Frequency-dependent stiffness and damping of railpads, Proceedings IMechE, Part F: Journal of Rail and Rapid Transit, vol 211, no F1, 1997, pp 51-62

Åsa Fenander: A fractional derivative railpad model included in a railway track model, Journal of Sound and Vibration, vol212, no5, 1998, pp 889-903

Åsa Fenander: Modelling stiffness and damping by use of fractional calculus with application to railpads, Doctoral Dissertation, Chalmers Solid Mechanics, Gothenburg 1997 (summary and four appended papers)

TS4. Lateral track dynamics

Clas Andersson, Johan Oscarsson and Jens Nielsen: Dynamic train/track interaction including state-dependent track properties and flexible vehicle components, Extended Abstracts 16th IAVSD Symposium - Dynamics of Vehicles on Roads and Tracks, Pretoria August-September 1999, pp 11-14

Clas Andersson and Tore Dahlberg: Load impacts at a railway turnout crossing, Extended Abstracts 16th IAVSD Symposium - Dynamics of Vehicles on Roads and Tracks, Pretoria August-September 1999, pp 32-34. Full length paper in Vehicle System Dynamics, vol 33, 2000, pp 131-142

Jeanette Lavery: 2-D rail-wheel contact in train-track interaction,, MSc thesis EX 1999:16, Chalmers Solid Mechanics 49 pp

Clas Andersson and Johan Oscarsson: Dynamic train/track interaction including state-dependent track properties and flexible vehicle components, Vehicle System Dynamics, vol 33, 1999, pp 47-58

Mikael Hallqvist: Track/vehicle simulation with explicit FE-code, MSc Thesis EX 2000:5, Chalmers Solid Mechanics, Gothenburg 2000, 58 pp

Clas Andersson: Modelling and simulation of general train/track interaction, Licentiate Thesis 2000:1, Chalmers Solid Mechanics, Gothenburg November 2000, 45 pp

Clas Andersson and Johan Oscarsson: Dynamic train/track interaction including state-dependent track properties and flexible vehicle components, see TS1

Clas Andersson: Modelling and simulation of general train/track interaction, Licentiate Thesis 2000:1, Chalmers Solid Mechanics, Gothenburg November 2000, 45 pp (summary and two appended papers)

Clas Andersson and Thomas Abrahamsson: Simulation of interaction between a train in general motion and a track, Vehicle System Dynamics, vol 36, no 6, 2002, pp 433-455

Clas Andersson and Thomas Abrahamsson: A partitioned  time integration approach for coupled systems in dynamics, Chalmers Applied Mechanics, Gothenburg 2002, 24 pp (submitted for international publication)

Clas Andersson: Vertical and lateral track dynamics – measurements, model and calibration, Research Report 2003:2, Chalmers Applied Mechanics, Gothenburg 2003, 38 pp

Clas Andersson and Anders Johansson: Prediction of rail corrugation generated by three-dimensional wheel-rail interaction, Research Report 2003:4, Chalmers Applied Mechanics, Gothenburg 2003, 28 pp (submitted for international publication)

Clas Andersson: Modelling and simulation of train-track interaction including wear prediction, Doctoral Dissertation, Chalmers Applied Mechanics, Gothenburg 2003, 163 pp (summary and five appended papers)

TS5. Out-of-round wheels - causes and consequences

Anders Johansson and Jens Nielsen: Out-of-round railway wheels - a literature survey, Chalmers Solid Mechanics, Report F 210, Göteborg 1998, 46 pp

Jens Nielsen and Anders Johansson: Out-of-round railway wheels - a literature survey, IMechE Journal of Rail and Rapid Transit, vol 214, no F2, 2000, pp 79-91. This is a condensed version of Report 210, Chalmers Solid Mechanics, Gothenburg 1998, 46 pp

Anders Johansson and Jens Nielsen: Railway wheel out-of-roundness – influence on wheel-rail contact forces and track response, Proceedings 13th International Wheelset Congress, Rome (Italy) September 2001, 9 pp on CD. (At the conference this work was awarded the prize for best paper in the category “Wheel-Rail Contact” )

Anders Johansson and Jens Nielsen: Out-of-round railway wheels – wheel-rail contact forces and track response derived from field tests and numerical simulations, IMechE Journal of Rail and Rapid Transit, vol 217, no F2, 2003, pp 135-146

Anders Johansson: Mathematical models for simulation of wheel-rail rolling contact and for prediction of wheel wear – survey of models for calculation of creep forces, spin moments and wear depths, Research Report 2003:3, Chalmers Applied Mechanics, Gothenburg 2003, 42 pp

Anders Johansson and Clas Andersson: Out-of-round railway wheels – a study of wheel polygonalization through simulation of three-dimensional wheel-rail interaction and wear, Research Report 2003:5, Chalmers Applied Mechanics, Gothenburg 2003, 38 pp

Jens Nielsen, Roger Lundén, Anders Johansson and Tore Vernersson: Train-track interaction and mechanisms of irregular wear on wheel and rail surfaces, Vehicle System Dynamics,vol 40, nos 1-3, 2003, pp 3-54. Also presented as an invited Keynote Lecture at 18th IAVSD Symposium, Dynamics of Vehicles on Roads and Tracks, Atsugi, Kanagawa (Japan) August 2003

Anders Johansson and Clas Andersson: Out-of-round railway wheels – study of formation of long periodic defects by combining analysis of wear and dynamic train-track interaction, 18th IAVSD Symposium, Dynamics of Vehicles on Roads and Tracks, Atsugi, Kanagawa (Japan) August 2003, Extensive Summaries, pp 291-293

Anders Johansson: Out-of-round railway wheels – literature survey, field tests and numerical simulations, Licentiate Thesis, Chalmers Applied Mechanics, Gothenburg September 2003,  87 pp (summary and three appended papers)

Anders Johansson: Out-of-round railway wheels – assessment of wheel tread irregularities in train traffic, accepted for presentation at the 8th International Workshop on Railway Noise (IWRN8), Buxton, UK, 8-11 September 2004, 12 pp

Anders Johansson: Out-of-round railway wheels – measurements of out-of-roundness, transverse profile and surface hardness, Research Report 2004:1, Chalmers Applied Mechanics, Gothenburg 2004, 40 pp

Anders Johansson and Clas Andersson: Out-of-round railway wheels – a study of wheel polygonalization through simulation of three-dimensional wheel-rail interaction and wear, Vehicle System Dynamics (accepted for publication)

Anders Johansson: Out-of-round railway wheels – assessment of wheel tread irregularities in train traffic, Proceedings 8th International Workshop on Railway Noise (IWRN8), Buxton, Derbyshire, UK, September 2004, vol 1, pp 297-308 (submitted to Journal of Sound and Vibration)

Anders Johansson: Integrerade beräkningsmodeller för användning inom Banverksprojektet “Hjulskador” (Integrated numerical models for use within the Banverket project “Wheel Damage”, in Swedish), Research Report 2004:11, Chalmers Applied Mechanics, Gothenburg 2004, 19 pp

Anders Johansson and Clas Andersson: Out-of-round railway wheels – a study of wheel polygonalization through simulation of three-dimensional wheel-rail interaction and wear, Vehicle System Dynamics, vol 43, no 8, 2005, pp 539 - 559

Anders Johansson and Jens Nielsen: Out-of-round railway wheels – influence of powered wheelsets with tread braking on rail corrugation growth, 19th IAVSD Symposium, Dynamics of Vehicles on Roads and Tracks, Poster Papers, Milan (Italy), August– September 2005, 2 pp (available on CD)

Anders Johansson and Jens Nielsen: Rail corrugation growth – influence of powered wheelsets with wheel tread irregularities (submitted for publication in Wear)

Anders Johansson: Out-of-round railway wheels – assessment of wheel tread irregularities in train traffic, Journal of Sound and Vibration (accepted for publication)

Anders Johansson: Out-of-round railway wheels – causes and consequences: an investigation including field tests, out-of-roundness measurements and numerical simulations, Doctoral Dissertation, Chalmers Applied Mechanics, Gothenburg September 2005, 191 pp (introduction, summary and six appended papers).

TS6. Identification of dynamic forces in trains

Lars J L Nordström and T Patrik Nordberg: A critical comparison of time domain load identification methods, 6th International Conference on Motion and Vibration Control” MOVIC2002, Saitama (Japan), August 2002 (accepted for presentation)

Christophe Deventer: Structural load identification with experimental evaluation, MSc Thesis EX2001:8, Chalmers Applied Mechanics, Gothenburg 2001, 81 pp

Lars Nordström and Patrik Nordberg: A time delay method  to solve non-collocated input estimation problems (submitted  to Mechanical Systems and Signal Processing)

Lars Nordström: Load identification using time domain methods, Licentiate Thesis 2003:1, Chalmers Applied Mechanics,Gothenburg 2003, 57 pp (summary and two appended papers)

Johanna Lilja: Identification of a finite element railway wheelset model, MSc Thesis EX2003:6, Chalmers Applied Mechanics, Gothenburg 2003, 58 pp

Lars Nordström and Patrik Nordberg: A time delay method to solve non-collocated input estimation problems, Mechanical Systems and Signal Processing, vol 18, 2004, pp 1469 1483 (the manuscript was previously announced as ‘submitted for publication’ in the semi-annual report 2002-12-31 and as ‘accepted for publication’ in the semi-annual report 2003-12-31)

Lars Nordström: A dynamic programming algorithm for input estimation on linear time-variant systems, Chalmers Applied Mechanics, Report 2004:12, Gothenburg 2004, 27 pp (submitted to Computer Methods in Applied Mechanics and Engineering)

Lars Nordström, Håkan Johansson and Fredrik Larsson: A strategy for load identification with sensitivity analysis, Abstract presented at 8th US National Congress on Computational Mechanics (USNCCM8), Austin TX (USA) July 2005, 1 p on CD

Lars Nordström: A dynamic programming algorithm for input estimation on linear time-variant systems, Computer Methods in Applied Mechanics and Engineering (in press)

Lars Nordström: Comments on: A dynamic programming algorithm for input estimation on linear time-variant systems, 5 pp (to be submitted to Computer Methods in Applied Mechanics and Engineering)

Lars Nordström, Håkan Johansson and Fredrik Larsson: A strategy for input estimation with sensitivity analysis (Submitted to International Journal for Numerical Methods in Engineering; included in Lars Nordström's dissertation)

Lars Nordström: Comments on ´A dynamic programming algorithm for input estimation on linear time-variant systems´ (submitted to Computer Methods in Applied Mechanics and Engineering)

Lars Nordström, Håkan Johansson and Fredrik Larsson: A strategy for input estimation with sensitivity analysis (to be submitted to International Journal for Numerical Methods in Engineering)

Lars Nordström: Input estimation in structural dynamics, Doctoral Dissertation, Chalmers Applied Mechanics, Gothenburg November 2005, 141 pp (introduction, summary and five appended papers)

TS7. Dynamics of track switches

Jan Henrik Sällström (editor), Tore Dahlberg, Magnus Ekh  and Jens Nielsen: State-of-the-art study on railway turnouts – dynamics and damage/Förstudie om spårväxlar – dynamik och slitage (both English and Swedish version), Research Report 2002:7, Chalmers Applied Mechanics, Gothenburg 2002, 50 pp

Jan-Henrik Sällström: Railway switches in Sweden – research towards enhanced reliability and maintenance, Proceedings International Railway Conference on Switches and Crossings, Delft (the Netherlands) March 2002, 18 pp on CD

Elias Kassa: Simulation of dynamic interaction between train and turnout, Licentiate Thesis, Chalmers Applied Mechanics, Gothenburg December 2004, 56 pp

Elias Kassa, Clas Andersson and Jens Nielsen: Simulation of dynamic interaction between train and railway turnout, Vehicle System Dynamics (accepted for publication)

Elias Kassa and Göran Johansson: Simulation of train-turnout interaction and plastic deformation of rail profiles, 19th  IAVSD Symposium, Three-Page Abstracts, Milan (Italy) August – September 2005, 3 pp (available on CD)

Elias Kassa and Göran Johansson: Simulation of train–turnout interaction and plastic deformation of rail profiles (submitted to Vehicle System Dynamics)

Martina Wiest, Elias Kassa, Werner Daves, Jens Nielsen and Heinz Ossberger: Assessment of methods for calculating contact pressure in wheel–rail/switch contact (to be presented at 7th International Conference on Contact Mechanics and Wear of Rail/Wheel Systems (CM2006), Brisbane (Australia) September 24-27, 2006) 

Martina Wiest, Elias Kassa, Werner Daves, Jens Nielsen and Heinz Ossberger: Assessment of methods for calculating contact pressure in wheel–rail/switch contact, Proceedings 7th International Conference on Contact Mechanics and Wear of Rail/Wheel Systems (CM2006), Brisbane (Australia) September 2006, vol 2, pp 501-508 (submitted for publication in Wear)

Elias Kassa and Jens Nielsen: Dynamic interaction between train and railway turnout −
full-scale field tests and validation of simulation models, abstract submitted for the 20th IAVSD symposium in Berkeley CA (USA) 13-17 August 2007 

Elias Kassa and Göran Johansson: Simulation of train–turnout interaction and plastic deformation of rail profiles, Supplement to Vehicle System Dynamics, vol 44, 2006, pp 349–359 

Elias Kassa and Jens Nielsen: Stochastic analysis of dynamic interaction between train and railway turnout, Vehicle System Dynamics (accepted for publication)

Elias Kassa and Jens Nielsen: Dynamic train–turnout interaction in an extended frequency range by including a structural dynamic track model (to be submitted for international publication)

Elias Kassa and Jens Nielsen: Dynamic interaction between train and railway turnout −
full-scale field tests and validation of simulation models. Abstract accepted for oral presentation at the 20th IAVSD Symposium in Berkeley CA (USA) 13-17 August 2007 

Elias Kassa: Dynamic train–turnout interaction – mathematical modelling, numerical simulation and field testing, Doctoral Dissertation, Chalmers Applied Mechanics, Gothenburg October 2007, 123 pp (introduction, summary and six appended papers)

TS8. Integrated track dynamics

Jens Nielsen, Anders Ekberg, Elena Kabo and Roger Lundén: Integrated analysis of dynamic train−track interaction and rolling contact fatigue, Proceedings 14th International Wheelset Congress, 17-21 October 2004, Orlando FL, USA, 15 pp (also listed under project MU9)

Jens Nielsen, Anders Ekberg and Roger Lundén: Influence of short-pitch wheel/rail corrugation on rolling contact fatigue of railway wheels, IMechE Journal of Rail and Rapid Transit (accepted for publication). Also listed under project MU9

Jens Nielsen, Jonas Ringsberg and Luis Baeza: Influence of railway wheel flat impact on crack growth in rails, Proceedings 8th International Heavy Haul Conference, Rio de Janeiro (Brazil) June 2005, pp 789-797

Jens Nielsen: Utvärdering av hjulskadedetektorer (Assessment of wheel impact load detectors, in Swedish), Chalmers Applied Mechanics, Gothenburg 22 February 2005, 11 pp

Jens Nielsen, Anders Ekberg and Roger Lundén: Influence of short-pitch wheel/rail corrugation on rolling contact fatigue of railway wheels, IMechE Journal of Rail and Rapid Transit, vol 219, no F3, 2005, pp 177-187 (also listed under project MU9)

Elena Kabo, Jens Nielsen and Anders Ekberg: Prediction of dynamic train-track interaction and subsequent material deterioration, 19th IAVSD Symposium, Three-Page Abstracts, Milan (Italy), August– September 2005, 3 pp (available on CD. Also listed under project MU9)

Elena Kabo, Jens Nielsen and Anders Ekberg: Prediction of dynamic train-track interaction and subsequent material deterioration in the presence of insulated rail joints, Vehicle System Dynamics (in press. Also listed under project MU9. This paper was announced in the previous semi-annual report)  

Anders Karlström, Jens Nielsen and Anders Boström: Train–track–soil numerical–analytical interaction model in the time domain, Chalmers Applied Mechanics / Division of Dynamics, Gothenburg 2006 (submitted for international publication. Also listed under project VB8)

Anders Ekberg, Elena Kabo, Jens Nielsen and Roger Lundén: Subsurface initiated rolling contact fatigue of railway wheels as generated by rail corrugation, Chalmers Applied Mechanics, Gothenburg 2006 (submitted for international publication. Also listed under project MU10)

Jens Nielsen: High-frequency vertical wheel–rail contact forces – validation of a prediction model by field testing (to be presented at the 7th International Conference on Contact Mechanics and Wear of Rail/Wheel Systems (CM2006), Brisbane (Australia) September 24-27, 2006. Also listed under project SP11)

Jens Nielsen: High-frequency vertical wheel–rail contact forces – validation of a prediction model by field testing, Proceedings 7th International Conference on Contact Mechanics and Wear of Rail/Wheel Systems (CM2006), Brisbane (Australia) September 2006, vol 1, pp 41-48 (submitted for publication in Wear. Also listed under project SP11)

Jens Nielsen: Out-of-round wheels, in Wheel/rail Interface Handbook (editors Roger Lewis and Ulf Olofsson), Woodhead Publishing, Cambridge (UK) (in press)

Elias Kassa and Jens Nielsen: Stochastic analysis of dynamic interaction between train and railway turnout, 15th Nordic Seminar on Railway Technology, Hook (Sweden) May 2008, 1+20 pp (Summary and PowerPoint presentation. Available on CD)

TS9. Track dynamics and sleepers

Jonas Zachrison: Reliability optimization with application to sleeper design, MSc Thesis EX 2004:6, Chalmers Applied Mechanics, Gothenburg December 2004, 41 pp

Johanna Lilja, Thomas Abrahamsson and Jens Nielsen: Experimental investigation of stochastic boundary conditions – planning a railway sleeper test, to be presented at the conference IMAC XXIV in St Louis (MO) in January-February 2006

Benoit Duveiller: Statistical evaluation of structural dynamics problems with application to sleeper design, MSc Thesis 2006:47, Chalmers Applied Mechanics / Division of Dynamics, Gothenburg 2006, 79 pp

Johanna Lilja: Preliminaries for probabilistic railway sleeper design, Licentiate Thesis, Chalmers Applied Mechanics, Gothenburg November 2006, 70 pp (summary and two appended papers)

Thomas Abrahamsson, Johanna Lilja and Jens Nielsen: Towards probabilistic design of railway sleepers, 15th Nordic Seminar on Railway Technology, Hook (Sweden) May 2008, 1+14 pp (Summary and PowerPoint presentation. Available on CD)

Johanna Lilja, Thomas Abrahamsson and Jens Nielsen: On the adequacy of metamodelling techniques in probabilistic design of railway sleepers, Proceedings 4th ASRANet International Colloquium, Athens (Greece) June 2008, 10 pp (available on CD)

TS10. Track response when using Under Sleeper Pads (USP)

Rikard Bolmsvik: Influence of USP on the track response – a literature survey (draft version), Abetong Teknik AB, Växjö 2005, 15 pp

Anders Johansson: Under Sleeper Pads – influence on dynamic train–track interaction, Research Report 2006:02, Chalmers Applied Mechanics / Division of Dynamics, Gothenburg 2006, 35 pp 

Anders Johansson, Jens Nielsen, Rikard Bolmsvik, Anders Karlström and Roger Lundén: Under Sleeper Pads – influence on dynamic train-track interaction (to be presented at 7th International Conference on Contact Mechanics and Wear of Rail/Wheel Systems (CM2006), Brisbane (Australia) September 24 – 27, 2006. Also listed under project VB8)

Anders Johansson, Jens Nielsen, Rikard Bolmsvik, Anders Karlström and Roger Lundén: Under Sleeper Pads – influence on dynamic train-track interaction, Proceedings 7th International Conference on Contact Mechanics and Wear of Rail/Wheel Systems, Brisbane (Australia) September 2006, vol 2, pp 583-592

Jens Nielsen: Erfahrungen mit besohlten Schwellen und Lösungen für Weichen, oral presentation at a symposium arranged by Getzner Werkstoffe in Schwarzenberg (Austria) on 14-16 November 2007

Johan Jonsson, Philippe Schneider, Rikard Bolmsvik, Tony Johansson and Jens Nielsen: Experimental study of the influence of USP on track response using LSQ on field measurement data, 15th Nordic Seminar on Railway Technology, Hook (Sweden) May 2008, 1+18 pp (Summary and PowerPoint presentation. Available on CD)

Anders Johansson, Jens Nielsen, Rikard Bolmsvik, Anders Karlström and Roger Lundén: Under sleeper pads – influence on dynamic train–track interaction, Wear, vol 265, nos 9-10, 2008, pp 1479-1487

TS11. Rail corrugation growth on curves 

Peter Torstensson: Rail corrugation growth on curves, 15th Nordic Seminar on Railway Technology, Hook (Sweden) May 2008, 1+34 pp (Summary and PowerPoint presentation. Available on CD)

TS12. Identification of wheel/rail contact forces

Hamed Ronasi: Identification of wheel-rail contact forces, 15th Nordic Seminar on Railway Technology, Hook (Sweden) May 2008, 1+20 pp (Summary and PowerPoint presentation. Available on CD)

VB1. Structural vibrations from railway traffic

Johan Jonsson: A literature survey of railway induced ground vibrations into buildings, Chalmers Dynamics in Design, Report D96:2, Gothenburg 1996, 16 pp

Johan Jonsson: Measurements of railway induced building vibrations at the Furet block in Halmstad, Chalmers Dynamics in Design, Report D96:3, Gothenburg 1996, 60 pp

Johan Jonsson: Ground vibrations - field measurements and prediction using finite element technique, Proceedings XVth IMAC (International Modal Analysis Conference), Tokyo, September 1997, pp 594-600

Johan Jonsson: Ground vibrations with reference to railway traffic, Licentiate Thesis D98:1, Chalmers Dynamics in Design, Gothenburg May 1998, 70 pp

Johan Jonsson: Comments to "Ground vibration generated by a load moving along a railway track" (paper by X Sheng, C J C Jones and M Petyt in Journal of Sound and Vibration, vol 228, no 1, 2000, pp 129-156), Journal of Sound and Vibration, vol 236, no 2, 2000, pp 359-361

Johan Jonsson: On ground and structural vibrations related to railway traffic, Doctoral Dissertation, Chalmers Structural Engineering/Division of Steel and Timber Structures, Gothenburg 2000, 184 pp

Johan Jonsson: Measurements and numerical simulations of surface waves using a plane model, Géotechnique, vol 50, no 4, 2000, pp 339-348

VB2. Noise from tread-braked railway wheels

Tore Vernersson and Roger Lundén: Stresses in Rc-locomotive tyres - on the influence of shrink-fit and braking stresses on rolling contact fatigue, Chalmers Solid Mechanics, Report F183, Gothenburg 1995, 45 pp

Tore Vernersson: Non-roundness of block-braked railway wheels - a literature survey, Chalmers Solid Mechanics, Report F186, Gothenburg 1996, 63 pp

Olof Cato, Tomas Göransson, Peter Johansson and Anders Lindberg: Acoustically short-circuited railway wheels - a preliminary experimental study, Student Report, Chalmers Solid Mechanics, Gothenburg 1995, 39 pp

Olaf Kämmerling: Vibrational modes of railway wheels, Student Report, Chalmers Solid Mechanics, Gothenburg 1995, 32 pp

Kenth Ackemo: Flexible wheels for railway vehicles, Student Report T146, Chalmers Solid Mechanics, Gothenburg 1996, 88 pp

Martin Petersson, Tore Vernerson and Roger Lundén: Research on roughness generation and growth, Chapter 5 (pp 35-52) of State of the art - final report (editor G J Bazuin), EuroSabot Technical Report 1N6G30T1.DA, NS, Utrecht 1996, 65 pp (+ annexes)

Martin Petersson and Roger Lundén: Thermal buckling of railway wheels, EuroSabot Technical Report 2H6O07TI.OA1, Chalmers Solid Mechanics, Gothenburg 1996, 10 pp (availability restricted)

Martin Petersson, Tore Vernersson and Roger Lundén: Full-scale block braking of railway wheels - Experiments performed on the Adtranz/Chalmers inertia dynamometer to investigate the roughness growth of freight car wheels, EuroSabot Technical Report 2H7U25T12.OB, Chalmers Solid Mechanics, Gothenburg 1997, 55 pp (availability restricted)

Tore Vernersson: Thermally induced roughness of tread braked railway wheels - a noise-related problem, Thesis for the Degree of Licentiate of Engineering, Chalmers Solid Mechanics, Gothenburg 1997, 77 pp

Tore Vernersson, Martin Petersson and Martin Hiensch: Thermally induced roughness of tread braked railway wheels, Proceedings 12th International Wheelset Congress, Qingdao (China) September 1998, pp 68-75

Per Kron: Spoked railway wheels - an optimization for low radial stiffness combined with low fatigue stresses, MSc Thesis EX 1998:5, Chalmers Solid Mechanics, Gothenburg 1998, 59 pp

Tore Vernersson: Thermally induced roughness of tread braked railway wheels, Part 1: Brake rig experiments, Wear, vol 236/1-2, pp 98-107

Tore Vernersson: Thermally induced roughness of tread braked railway wheels, Part 2: Modelling and field measurements, Wear, vol 236/1-2, pp 108-118

Martin Petersson: Noise-related roughness of railway wheels - testing of thermomechanical interaction between brake block and wheel tread, Licentiate Thesis 1999:4, Chalmers Solid Mechanics, Gothenburg 1999, 40 pp

Patrik Nordberg: A model for computation of the transient temperature field during block braking of railway wheels, MSc Thesis EX 1999:9, Chalmers Solid Mechanics, Gothenburg October 1999, 48 pp

Martin Petersson: Noise-related roughness of railway wheel treads - full-scale testing of brake blocks, IMechE Journal of Rail and Rapid Transit, vol 214, no F2, pp 63-77

Martin Petersson and Tore Vernersson: Noise-related roughness of tread braked railway wheels - experimental measurements and numerical simulations, Proceedings 5th International Conference on Contact Mechanics and Wear of Rail/Wheel Systems, Tokyo (Japan) July 2000, pp 293-299

Martin Petersson: Two-dimensional finite element simulation  of the thermal problem at railway block braking, IMechE Journal of Mechanical Engineering Science, vol 216, no C3,  2002, pp 259-273

Martin Petersson and Tore Vernersson: Noise-related roughness on tread braked railway wheels – experimental measurements and numerical simulations, Wear, vol 253, nos 1-2, 2002, pp 301-307 (revised version of conference paper)

VB3. Noise rig

Urban Olin and Anneli Sandelius: Sinussvepsgenerator för bullermätsystem (Sine sweep generator for noise measuring systems, in Swedish), Department of Electrical Engineering, Chalmers College of Applied Engineering and Maritime Studies, Student Report 97:34, Gothenburg 1997, 22 pp

Leonard Hillkirk: Evaluation of a contact-free electromechanical exciter of train wheels, Department of Electrical Power Engineering, Royal Institute of Technology, Student Report (in preparation)

VB4. Vibrations and external noise from train and track

Carl Fredrik Hartung: Vibrations and external noise from train and track - a literature survey, Chalmers Solid Mechanics, Report F227, Gothenburg 2000, 27 pp

Carl Fredrik Hartung and Tore Vernersson: A full-scale test rig for railway rolling noise - simulation and measurement of dynamic wheelset-track interaction, Chalmers Solid Mechanics, Gothenburg 2001, 17 pp (presented at Seventh International Workshop on Railway Noise (IWRN) in Portland ME, 24-27 October 2001)

Carl Fredrik Hartung and Tore Vernersson: A full-scale test rig for railway rolling noise – simulation and measurements of dynamic wheelset track interaction, Proceedings of the 7th International Workshop on Railway Noise, Portland, ME, USA, November 2001

Carl Fredrik Hartung and Tore Vernersson: A full-scale test rig for railway rolling noise – simulation and measurements of dynamic wheelset track interaction, Journal of Sound and Vibration, vol 267,  no 3, 2003, pp 549-563(revised version accepted for publication in Journal of Sound and Vibration)

Carl Fredrik Hartung: A full-scale test rig for railway rolling noise, Licentiate Thesis 2002:3, Chalmers Applied Mechanics, Gothenburg November 2002, 68 pp (summary and two appended papers)

Carl Fredrik Hartung, Anders Frid and Jens Nielsen: Railway rolling noise emission from wheel and track – simulations and full-scale test rig measurements, Proceedings 10th International Congress on Sound and Vibration (ICSV10), Stockholm (Sweden) July 2003, 8 pp

VB5. Wave propagation under high-speed trains

Torbjörn Ekevid and Nils-Erik Wiberg: Wave propagation in soils related to high-speed trains, Proceedings 12th Nordic Seminar on Computational Mechanics, NSCM-12, Helsinki (Finland) October 1999, pp 51-54

Nils-Erik Wiberg, Torbjörn Ekevid and Xiangdong Li: Wave propagation in solids by adaptive DG-FE procedure, Keynote Lecture at European Conference on Computational Mechanics, ECCM'99, Munich (Germany) August- September 1999. See also Chalmers Structural Mechanics, publ 99:19, Gothenburg 1999, 17 pp (submitted for international journal publication)

Torbjörn Ekevid, Martin X D Li and Nils-Erik Wiberg: Adaptive finite element analysis of wave propagation under moving loads induced by high-speed trains, Keynote Lecture at European Congress on Computational Methods in Applied Science and Engineering, ECCOMAS 2000, Barcelona (Spain) September 2000. See also Chalmers Structural Mechanics, publ 00:3, Gothenburg 2000, 19 pp (submitted for international journal publication)

Torbjörn Ekevid and Nils-Erik Wiberg: Wave propagation - explicit code for parallel computing, Proceedings European Congress on Computational Methods in Applied Science and Engineering, ECCOMAS 2000, Barcelona (Spain) September 2000. See also Chalmers Structural Mechanics, publ 00:4, Gothenburg 2000, 18 pp

Torbjörn Ekevid and Nils-Erik Wiberg: Parallel computing of wave propagation problems, Proceedings 13th Nordic Seminar on Computational Mechanics, NSCM-13, Oslo (Norway) October 2000, pp 167-170

Torbjörn Ekevid and Nils-Erik Wiberg: Wave propagation related to moving loads close to critical speed, Proceedings 2nd International Workshop on Wave Propagation, Moving Loads and Vibration Reduction, WAVE2000, Bochum (Germany) December 2000, pp 43-52

Torbjörn Ekevid: On computational wave propagation in solids - with emphasis on high-speed train related to ground vibrations, Licentiate Thesis, Chalmers Structural Mechanics, Gothenburg December 2000, 95 pp

Torbjörn Ekevid and Nils-Erik Wiberg: On parallel computations and wave propagation, Trends in Computational Structural Mechanics, Lake Constance (Germany) May 2001, and Chalmers Structural Mechanics, Publ 01:3, Gothenburg 2001, 12 pp

Torbjörn Ekevid, Nils-Erik Wiberg and Martin X D Li: On wave propagation problems associated to high-speed trains, European Conference on Computational Mechanics, ECCM 01, Cracow (Poland), June 2001, and Chalmers Structural Mechanics, Publ 01:4, Gothenburg 2001, 20 pp

Torbjörn Ekevid: Field measurements of ground vibrations at Ledsgård, Chalmers Structural Mechanics, Report 01:4, Gothenburg 2001, 30 pp

Martin X D Li, Alexander Smekal and Nils-Erik Wiberg: Finite element modelling of high-speed train induced track-ground vibrations, Proceedings 8th International Congress on Sound and Vibration (ICSV8), Hong Kong (China) July 2001, pp 2859-2866

Torbjörn Ekevid, Martin X D Li and Nils-Erik Wiberg: Adaptive FEA of wave propagation induced by high-speed trains, Computers & Structures, vol 79, nos 29-30, November 2001, pp 2693-2704

Torbjörn Ekevid and Nils-Erik Wiberg: A comparison of parallel implementation of explicit DG and central difference method, Communications in Numerical Methods in Engineering (accepted)

Torbjörn Ekevid and Nils-Erik Wiberg: Wave propagation related to high-speed trains - a scaled boundary FE-approach for unbounded domains, Computer Methods in Applied Mechanics and Engineering (submitted)

Per Kettil, Torbjörn Ekevid and Nils-Erik Wiberg: Towards fully mesh adaptive FE-simulations in 3D using multi-grid solver, Computers & Structures (submitted)

Torbjörn Ekevid and Nils-Erik Wiberg: High-speed induced ground vibrations - an application of the scaled boundary finite element method, Proceedings 13th Nordic Seminar on Computational Mechanics, NSCM-14, Lund (Sweden) October 2001, pp 245-248

Torbjörn Ekevid and Nils-Erik Wiberg: High-speed induced ground vibrations - an application of the scaled boundary finite element method, Proceedings 13th Nordic Seminar on Computational Mechanics, NSCM-14, Lund (Sweden) October 2001, pp 245-248

Torbjörn Ekevid, Martin X D Li and Nils-Erik Wiberg: Adaptive FEA of wave propagation induced by high-speed trains, Computers & Structures, vol 79, nos 29-30, November 2001, pp 2693-2704

Torbjörn Ekevid and Nils-Erik Wiberg: A comparison of parallel implementation of explicit DG and central difference method, Communications in Numerical Methods in Engineering, vol 18, no 8, 2002, pp 585-597

Torbjörn Ekevid and Nils-Erik Wiberg: Wave propagation related to high-speed trains - a scaled boundary FE-approach for unbounded domains, Computer Methods in Applied Mechanics and Engineering, vol 191, no 36, 2002, pp 3947-3964

Rickard Arnell and Karl-Gustaf Piper: Dynamic FE-analysis of train-induced vibrations - a parameter study, MSc Thesis 02:6, Chalmers Structural Mechanics, Gothenburg 2002, 73 pp

Torbjörn Ekevid and Nils-Erik Wiberg: Computational wave propagation by adaptive multigrid FE-technique (Keynote Lecture), Proceedings 5th World Congress on Computational Mechanics (WCCM V), Vienna (Austria) July 2002, 18 pp on CD, ISBN3-9501554-0-6, http://wccm.tuwien.ac.at. Abstract on p 609

Torbjörn Ekevid: Computational solid wave propagation – numerical techniques and industrial applications, Doctoral Dissertation, Chalmers Structural Mechanics, Gothenburg December 2002, 148 pp (summary and five appended papers)

Per Kettil, Torbjörn Ekevid and Nils-Erik Wiberg: Towards fully mesh adaptive FE-simulations in 3D using multigrid solver, Computers & Structures, vol 81, nos 8-11, 2003, pp 735-746

Torbjörn Ekevid, Per Kettil and Nils-Erik Wiberg: Adaptive multigrid FE-technique for computational plasticity, Proceedings 7th International Conference on Computational Plasticity (COMPLAS 2003), Barcelona (Spain) April 2003, 14 pp on CD. Abstract on p 144

Martin X D Li, Torbjörn Ekevid and Nils-Erik Wiberg: An integrated vehicle-track-ground model for investigating the wheel/rail dynamic forces due to high axle loads, Proceedings  6th International Conference on Contact Mechanics and Wear  of Rail/Wheel Systems (CM2003), Gothenburg June 2003, vol II, pp 295-300

Torbjörn Ekevid and Nils-Erik Wiberg: Analysis of high-speed train related ground vibrations by a hybrid method, Proceedings IABSE Symposium: Structures for High-Speed Railway Transportation, Antwerp (Belgium) August 2003, 6 pp on CD. Abstract on pp 240-241

Håkan Lane, Torbjörn Ekevid and Nils-Erik Wiberg: Adaptive solid wave propagation – influences of boundary conditions  in high-speed train applications, Proceedings 1st International Conference on Adaptive Modeling and Simulation (ADMOS), Gothenburg September–October 2003, pp 93-94 (abstract only)

Per Kettil, Torbjörn Ekevid and Nils-Erik Wiberg: Adaptive multigrid for finite element computations in plasticity, Computers and Structures (accepted for publication)

Torbjörn Ekevid, Håkan Lane and Nils-Erik Wiberg: Adaptive solid wave propagation – influences of boundary conditions in high-speed train applications (submitted for possible publication in Computer Methods in Applied Mechanics and Engineering) 

VB6. Interaction of train, soil and buildings

Vincent Gillard: Modal analysis and numerical modelling of a concrete railway sleeper, MSc Thesis 01:6, Chalmers Structural Engineering, Gothenburg May 2001, 130 pp

Johan Jonsson: Final report on part of the CHARMECproject VB6 “Soil-structure interaction – countermeasures against ground vibrations from railway traffic”, Chalmers/CHARMEC, Gothenburg 2002, 18 pp 

VB7. Vibration transmission in railway vehicles

Per Kalling, Thomas Abrahamsson and Tomas McKelvey: Synthesis of subsystem state-space models, Research Report 2004:4, Chalmers Applied Mechanics, Gothenburg 2004, 24 pp

Per Kalling, Thomas Abrahamsson and Tomas McKelvey: Subsystem state-space model identification and its sensitivity to test variability, Proceedings ISMA 2004 Conference on Noise and Vibration Engineering, Leuven (Belgium) September 2004, 15 pp

Per Sjövall: Component synthesis and identification in structural dynamics, Licentiate Thesis 2004:4, Chalmers Applied Mechanics, Gothenburg September 2004, 52 pp (summary and two appended papers)

Per Sjövall, Tomas McKelvey and Thomas Abrahamsson: Constrained state-space system identification with application to structural dynamics (submitted to Automatica and also in abbreviated form as a conference paper to 14th IFAC Symposium on System Identification (SYSID2006) to be held in Newcastle, Australia, 29-31 March 2006

Per Sjövall, Tomas McKelvey and Thomas Abrahamsson: Constrained state-space system identification with application to structural dynamics, Automatica (in press. This paper was announced in a previous semi-annual report)

Per Sjövall, Tomas McKelvey and Thomas Abrahamsson: Constrained state-space system identification with application to structural dynamics, Preprints 14th IFAC Symposium on System Identication, Newcastle (Australia) March 2006, pp 1294-1299 (IFAC = International Federation of Automatic Control)

Per Sjövall, Tomas McKelvey and Thomas Abrahamsson: Constrained state-space system identification with application to structural dynamics, Automatica, vol 42, no 9, 2006, pp 1539-1546 (this paper was announced in the previous semi-annual report)

Per Sjövall and Thomas Abrahamsson: State-space model identification for component synthesis (accepted for presentation at the 25th International Modal Analysis Conference (IMAC-XXV) in Orlando FL (USA)
19-22 February 2007

Per Sjövall and Thomas Abrahamsson: Component system identification and state-space model synthesis, Mechanical Systems and Signal Processing (in press)

Per Sjövall and Thomas Abrahamsson: Substructure system identification from coupled system test data, Mechanical Systems and Signal Processing (accepted for publication)

Per Sjövall and Thomas Abrahamsson: Transmission path characterization for passive vibration control, accepted for presentation at the 14th International Congress on Sound and Vibration (ICSV14) in Cairns (Australia) 9-12 July 2007

Per Sjövall and Thomas Abrahamsson: Optimal sensor placement for indirect vibration sensing, Chalmers Applied Mechanics / Division of Dynamics, Gothenburg 2007 

Per Sjövall: Identification and synthesis of components for vibration transfer path analysis, Doctoral Dissertation, Chalmers Applied Mechanics, Gothenburg 2007, 149 pp (introduction, summary and five appended papers)

VB8. Ground vibrations from railways

Anders Karlström: An analytical model for ground vibrations from accelerating trains, Proceedings 8th International Workshop in Railway Noise (IWRN8), Buxton UK, 8-11 September 2004, 10 pp

Anders Karlström: An analytical model for ground vibrations from accelerating trains, Proceedings 8th International Workshop in Railway Noise (IWRN8), Buxton, Derbyshire, UK, September 2004, vol 1, pp 85-96 (also submitted to Journal of Sound and Vibration). This paper was announced in the previous semi-annual report

Anders Karlström: Modelling of ground vibrations from railways using an analytical approach, Licentiate Thesis, Chalmers Applied Mechanics, Gothenburg October 2004, 43 pp (summary and two appended papers)

Anders Karlström and Anders Boström: An analytical model for train induced ground vibrations from railways, Journal of Sound and Vibration (in press)

Anders Karlström: An analytical model for ground vibrations from accelerating trains, Journal of Sound and Vibration (in press)

Anders Karlström and Anders Boström: An extended analytical model including a layered embankment to simulate ground vibrations from railway traffic, Proceedings 2nd International Symposium on Environmental Vibrations – Prediction, Monitoring, Mitigation and Evaluation, Okayama (Japan) September 2005, pp 303-310

Anders Karlström and Anders Boström: An analytical model for train-induced ground vibrations from railways, Journal of Sound and Vibration, vol 292, nos 1-2, 2006, pp 221-241 

Anders Karlström: An analytical model for ground vibrations from accelerating trains, Journal of Sound and Vibration, vol 293, nos 3-5, 2006, pp 587-598 
Anders Karlström and Anders Boström: On the modelling of trenches as countermeasures to train-induced ground vibration, Chalmers Applied Mechanics / Division of Dynamics, Gothenburg 2006 (submitted for international publication) 
Anders Karlström and Jens Nielsen: Train-track-soil numerical-analytical interaction model in the time domain, Chalmers Applied Mechanics / Division of Dynamics, Gothenburg 2006 (submitted for international publication. Also listed under project TS8) 

Anders Johansson, Jens Nielsen, Rikard Bolmsvik, Anders Karlström and Roger Lundén: Under Sleeper Pads − influence on dynamic train-track interaction (to be presented at 7th International Conference on Contact Mechanics and Wear of Rail/Wheel Systems (CM2006), Brisbane (Australia) September 24-27, 2006. Also listed under project TS10)

Anders Karlström and Anders Boström: Efficiency of trenches along railways for trains moving at sub- or supersonic speeds, Soil Dynamics and Earthquake Engineering 

Anders Karlström, On the modelling of train induced ground vibrations with analytical methods, Doctoral Dissertation, Chalmers Applied Mechanics, Gothenburg September 2006, 103 pp (introduction, summary and five appended papers)

VB9. Dynamics of railway systems

Håkan Lane, Torbjörn Ekevid and Nils-Erik Wiberg: Towards integrated vehicle-track-underground modelling of train induced wave propagation, Book of Abstracts 4th European Congress on Computational Methods in Applied Sciences and Engineering (ECCOMAS 2004), Jyväskylä (Finland) July 2004, vol I, p 115. Full paper in Proceedings on CD, 20 pp

Håkan Lane, Per Kettil and Nils-Erik Wiberg: Modelling train passage in curves with isoparametric differential constraint equations, Proceedings 17th Nordic Seminar in Computational Mechanics (NSCM-17), Stockholm October 2004, pp 141-144

Chun-Yuen Ching: Finite element rail vibration dynamics - multi-body dynamics of modern high-speed trains, MSc Thesis 04:15, Chalmers Structural Engineering and Mechanics, Gothenburg December 2004, 125 pp

Martin Larsson and Sebastian Berg: Finite element rail vibration dynamics – ground improvement with lime-cement columns, MSc Thesis 2005:12, Chalmers Applied Mechanics, Gothenburg March 2005, 73 pp

Håkan Lane, Per Kettil, Mikael Enelund, Torbjörn Ekevid and Nils-Erik Wiberg: Absorbing boundary layers for elastic wave propagation (to be presented at the COMPLAS2005 Conference on Computational Plasticity, Barcelona (Spain) 5-8 September 2005) 

Håkan Lane: Rail vehicle – track structure – subgrade computational analysis − Integrated finite element techniques, Licentiate Thesis, Chalmers Applied Mechanics, Gothenburg June 2005, 105 pp (including three appended papers)

Håkan Lane, Per Kettil, Mikael Enelund, Torbjörn Ekevid and Nils-Erik Wiberg: Absorbing boundary layers for elastic wave propagation, Proceedings Eighth International Conference on Computational Plasticity, COMPLAS 2005, Barcelona (Spain) September 2005, pp 1087-1090

Per Kettil, Håkan Lane and Nils-Erik Wiberg: The moving mesh adaption technique – application to train induced wave propagation. Proceedings Conference on Adaptive Modeling and Simulation, ADMOS2005, Barcelona (Spain) September 2005, pp 81-91

Håkan Lane, Sebastian Berg and Martin Larsson: Finite element calculations of rail vibration countermeasures (to appear in Procedings Conference on Mathematical Modelling of Wave Phenomena 2005), 9 pp 

Håkan Lane, Sebastian Berg and Martin Larsson: Finite element calculations of rail vibration countermeasures (submitted to Vehicle System Dynamics)

George Godwin Ogwemoh: Finite element rail vibration dynamics – influence of track irregularities, MSc Thesis 2005:79, Chalmers Applied Mechanics, Gothenburg December 2005, 106 pp

Håkan Lane, Per Kettil, Mikael Enelund, Torbjörn Ekevid and Nils-Erik Wiberg: Absorbing boundary layers for elastic wave propagation (submitted to Applied Mathematical Modelling)  

Håkan Lane, Per Kettil and Nils-Erik Wiberg: Moving mesh adaptivity applied to railway dynamics, Paper 2373 at 3rd European Conference on Computational Mechanics (ECCM2006), Lisbon (Portugal) June 2006. See Book of Abstracts, Springer, Berlin 2006, p 406  

Håkan Lane, Torbjörn Ekevid, Per Kettil, Robin Ching and Nils-Erik Wiberg: Adaptive multigrid for full scale railway dynamics (abstract sent to the International Conference on Computational and Applied Mathematics to be held in Leuven (Belgium) on July 10-14, 2006) 

Torbjörn Ekevid, Per Kettil, Håkan Lane and Nils-Erik Wiberg: Computational railway dynamics, Keynote Lecture delivered at 3rd European Conference on Computational Mechanics (ECCM2006), Lisbon (Portugal) June 2006. Printed in Computational Mechanics (editors C A Mota Soares, J A C Martins, H C Rodrigues and J A C Ambrósio), Springer, Berlin 2006, pp 577-598

Håkan Lane, Torbjörn Ekevid, Per Kettil, Chun-Yuen Ching and Nils-Erik Wiberg: Adaptive multigrid for full scale railway dynamics, Proceedings 12th International Conference on Computational and Applied Mathematics (ICCAM 2006), Leuven (Belgium) July 2006, 22 pp (available on CD. This paper was announced in the previous semi-annual report)

Håkan Lane, Sebastian Berg and Martin Larsson: Finite element calculations of rail vibration countermeasures, Vehicle System Dynamics (accepted for publication)

Håkan Lane, Per Kettil and Nils-Erik Wiberg: Moving finite elements and dynamic vehicle interaction (submitted to European Journal of Mechanics A – Solids)

Håkan Lane, Torbjörn Ekevid, Per Kettil, Chun-Yuen Ching and Nils-Erik Wiberg: Adaptive procedures for full scale railway dynamics (submitted to Journal of Computational and Applied Mathematics)

Håkan Lane: Computational railway dynamics – integrated track-train-subgrade modeling and simulations, Doctoral Dissertation, Chalmers Applied Mechanics, Gothenburg May 2007, 189 pp (introduction, summary and seven appended papers)

Håkan Lane: Sparse parallel procedures for railway dynamic problems (submitted to Journal of Engineering Computations)

Håkan Lane, Per Kettil and Nils-Erik Wiberg: Rail vibrations caused by ground stiffness transitions, Keynote lecture delivered by Nils-Erik Wiberg at the conference Computational Dynamics in Structural Dynamics and Earthquake Engineering, Rethymno/Crete (Greece) 13-16 June 2007

Håkan Lane, Sebastian Berg and Martin Larsson: Finite element calculations of rail vibration countermeasures, Vehicle System Dynamics (COMDYN2007), vol 45, no 6, 2007, pp 565-581

Håkan Lane, Chuan-Yuen Ching and Nils-Erik Wiberg: Adaptive strategies for improved ride comfort over imperfect tracks, to be presented at the 3rd International Conference on Adaptive Modeling and Simulation (ADMOS2007), Gothenburg, 22-24 October 2007

VB10. External noise generation from trains

Astrid Pieringer, Wolfgang Kropp and Jens Nielsen: A time domain model for wheel/rail interaction aiming to include non-linear contact stiffness and tangential friction, Proceedings 9th International Workshop on Railway Noise (IWRN9), Feldafing/Munich (Germany) 4-8 September 2007 (to be published on CD)

Astrid Pieringer, Wolfgang Kropp and Jens Nielsen: A time domain model for wheel/rail interaction aiming to include non-linear contact stiffness and tangential friction, Notes on Numerical Fluid Mechanics and Multidisciplinary Design, vol 99 (Noise and Vibration Mitigation for Rail Transportation Systems), Springer, Berlin 2008, pp 285-291 

Astrid Pieringer and Wolfgang Kropp: Simulation of impact forces caused by wheel flats − a parameter study, 15th Nordic Seminar on Railway Technology, Hook (Sweden) May 2008, 1+36 pp (Summary and PowerPoint presentation. Available on CD)

Astrid Pieringer and Wolfgang Kropp: A fast time-domain model for wheel/rail interaction demonstrated for the case of impact forces caused by wheel flats, Proceedings Acoustics’08, Paris June-July 2008, 6 pp (available on CD). Abstract in Journal of the Acoustical Society of America (JASA), vol 123, no 5, p 3266

MU1. Mechanical properties of ballast

Mustafa Kaya, Russ Jernigan, Kenneth Runesson and Stein Sture: Reproducibility of conventional triaxial tests on ballast materials, Department of Civil, Environmental, and Architectural Engineering (CEAE), University of Colorado, Report No 1 to CHARMEC, February 1997, 43 pp

Mustafa Kaya, Russ Jernigan, Kenneth Runesson and Stein Sture: Reproducibility of conventional triaxial tests on ballast materials, Department of Civil, Environmental, and Architectural Engineering (CEAE), University of Colorado, Report No 2 to CHARMEC, May 1997, 40 pp

Lars Jacobsson: Review of research on railway ballast behaviour - Experimental findings and constitutive models, Chalmers Solid Mechanics, Report F208, Gothenburg 1998, 32 pages

Russel Jernigan: The physical modelling of soils containing oversized particles, University of Colorado at Boulder, Department of Civil, Environmental, and Architectural Engineering (CEAE), PhD Thesis, Boulder 1998, 501 pp

Lars Jacobsson: A plasticity model for cohesionless material with emphasis on railway ballast, Licentiate Thesis 1999:1, Chalmers Solid Mechanics, Gothenburg 1999, 93 pp

Lars Jacobsson and Kenneth Runesson: Integration and calibration of a plasticity model for granular materials, Proceedings IUTAM Symposium on Theoretical and Numerical Methods in Continuum Mechanics of Porous Materials, Stuttgart (Germany) September 1999, pp 215-220

Yu-Ning Ge, Lars Jacobsson, Kenneth Runesson and Stein Sture: Cyclic behaviour and elastic shake-down of coarse-sized granular materials, ASCE 14th Engineering Mechanics Conference, Austin TX May 2000, 5 pp

Lars Jacobsson and Kenneth Runesson: Computational modeling of high cycle conditioning of coarse-sized granular materials, Proceedings 2nd European Conference on Computational Mechanics (ECCM-2001), Cracow, June 26-29, 2001, 10 pp

Lars Jacobsson and Kenneth Runesson: Integration and calibration of a plasticity model for granular materials, International Journal for Numerical and Analytical Methods in Geomechanics, vol 26, 2002, pp 1-14

Lars Jacobsson and Kenneth Runesson: Computational modeling of high-cycle deformation of railway ballast, Proceedings  5th World Congress on Computational Mechanics (WCCM V), Vienna (Austria) July 2002, 12 pp (ISBN3-9501554-0-6, http://wccm.tuwien.ac.at)

MU2. New materials in wheels and rails

Johan Ahlström: Phase transformations in railway wheel steels exposed to friction heating - problem and literature survey, Chalmers Engineering Metals, Report 776/96, Gothenburg 1996, 18 pp

Johan Jergéus, Christer Odenmarck, Roger Lundén, Birger Karlsson, Peter Sotkovszki and Per Gullers: The Silinge wheel flat experiments, Chalmers Solid Mechanics, Report F202, Gothenburg 1997, 209 pp

Johan Ahlström: Phase transformations in railway wheels during wheel slide, Licentiate Thesis, Chalmers Engineering Metals, Gothenburg December 1998, 71 pp

Johan Ahlström and Birger Karlsson: Fatigue crack nucleation induced by surface shearing of railway wheels, Proceedings Fatigue '99, 7th International Fatigue Congress, Beijing (China) June 1999, pp 2609-2614

Johan Ahlström and Birger Karlsson: Microstructural evaluation and interpretation of the mechanically and thermally affected zone under railway wheel flats, Wear, vol 232, 1999, pp 1-14

Johan Ahlström and Birger Karlsson: Analytical 1D model for analysis of the thermally affected zone during railway wheel skid, Wear, vol 232, 1999, pp 15-24

Johan Ahlström and Birger Karlsson: Modelling of heat conduction and phase transformations during wheel sliding - theoretical predictions and comparison with results of full-scale experiments, Proceedings 5th International Conference on Contact Mechanics and Wear of Rail/Wheel Systems, Tokyo (Japan) July 2000, pp 287-292

Johan Ahlström and Birger Karlsson: Cyclic deformation and fatigue behaviour of microalloyed carbon steels for use in railway wheels, Proceedings Euromat 2000: Advances in Mechanical Behaviour, Plasticity, and Damage, Tours (France) November 2000, pp 1021-1026

Johan Ahlström: Thermal and mechanical behaviour of railway wheel steel, Doctoral Dissertation, Chalmers Engineering Metals, Gothenburg February 2001, 142 pp (summary and six appended papers)

Johan Ahlström and Birger Karlsson: Modified railway wheel steels – production and evaluation of mechanical properties with emphasis on low cycle fatigue behaviour, Chalmers Engineering Metals, Gothenburg 2001, 19 pp

Johan Ahlström and Birger Karlsson: Modelling of heat conduction and phase transformations during sliding of railway wheels, Wear, vol 253, nos 1-2, 2002, pp 291-300 (revised version of conference paper)

MU3. Martensite formation and damage around railway wheel flats

Johan Jergéus, Roger Lundén and Per Gullers: Martensite formation around railway wheel flats, Proceedings of the 11th International Wheelset Congress, Paris, June 18-25, 1995, pp 53-58

Johan Jergéus: Martensite formation and damage around railway wheel flats, Proceedings of 6th International Heavy Haul Conference "Strategies beyond 2000", Cape Town, April 7-11, 1997, vol 2, pp 889-904

Christer Odenmarck and Markus Wallentin: Friction heat partitioning and martensite formation at wheel/rail sliding contacts, Chalmers Solid Mechanics, Report T145, Gothenburg 1996, 49 pp

Johan Jergéus: Martensite formation and residual stresses around railway wheel flats, Proceedings IMechE, Part C: Journal of Mechanical Engineering Science, vol 212, no C1, 1998, pp 69-79

Johan Jergéus: Railway wheel flats - martensite formation, residual stresses, and crack propagation, Doctoral Dissertation, Chalmers Solid Mechanics, Gothenburg January 1998, 111 pp (summary and five appended papers)

Johan Jergéus, Christer Odenmarck, Roger Lundén, Peter Sotkovszki, Birger Karlsson and Per Gullers: Full-scale railway wheel flat experiments, IMechE Journal of Rail and Rapid Transit, vol 213, no F1, 1999, pp 1-13

Markus Wallentin, Hans Bjarnehed and Roger Lundén: Cracks around railway wheel flats exposed to rolling contact loads and residual stresses, Proceedings 6th International Conference on Contact Mechanics and Wear of Rail/Wheel Systems (CM2003), Gothenburg June 2003, vol II, pp 385-396

MU4. Prediction of life-time of railway wheels

Anders Ekberg and Hans Bjarnehed: Rolling contact fatigue of wheel/rail systems - a literature survey, Chalmers Solid Mechanics, Report F182, Gothenburg 1995, 50 pp

Anders Ekberg, Hans Bjarnehed and Roger Lundén: A fatigue life model for general rolling contact with application to wheel/rail damage, Fatigue & Fracture of Engineering Materials & Structures, vol 18, no 10, 1995, pp 1189-1199

Anders Ekberg: Rolling contact fatigue of railway wheels - computer modelling and in-field data, Proceedings 2nd MiniConference on Contact Mechanics and Wear of Rail/Wheel Systems, Budapest, July 1996, pp 154-163

Anders Ekberg: Rolling contact fatigue of railway wheels - a parametric study, Wear, vol 211, 1997, pp 280-288

Anders Ekberg: Rolling contact fatigue of railway wheels, Thesis for the Degree of Licentiate of Engineering, Chalmers Solid Mechanics, Gothenburg 1997, 55 pp

Anders Ekberg: Fatigue - a survey, Chalmers Solid Mechanics, Report U67, Gothenburg 1997, 60 pp

Anders Ekberg: Fatigue - a survey, Chalmers Solid Mechanics, Report U67, 2nd edition, Gothenburg 1998, 70 pp

Anders Ekberg: Random multiaxial fatigue initiation - 13 annotated references 1991-1998, Chalmers Solid Mechanics, Report F 209, Gothenburg 1998, 17 pp

Anders Ekberg, Reine Lindqvist and Martin Olofsson: Multiaxial fatigue - a probabilistic analysis of initiation in cases of defined stress cycles, Proceedings Fatigue '99, 7th International Fatigue Congress, Beijing (China) June 1999, pp 923-928

Anders Ekberg: Rolling contact fatigue of railway wheels - towards tread life prediction through numerical modelling considering material imperfections, probabilistic loading and operational data, Doctoral Dissertation, Chalmers Solid Mechanics, Gothenburg April 2000, 128 pp (summary and six appended papers)

Anders Ekberg and Johan Marais: Effects of imperfections on fatigue initiation in railway wheels, IMechE Journal of Rail and Rapid Transit, vol 214, no F1, 2000, pp 45-54

Elena Kabo and Anders Ekberg: Fatigue initiation in railway wheels - on the influence of defects, Proceedings 5th International Conference on Contact Mechanics and Wear of Rail/Wheel Systems, Tokyo (Japan) July 2000, pp 17-22 (to appear in Wear)

Anders Ekberg and Peter Sotkovszki: Anisotropy and rolling contact fatigue of railway wheels, International Journal of Fatigue, vol 23, no 1, 2000, pp 29-43

MU5. Mechanical properties of concrete sleepers

Rikard Gustavson: Static and dynamic loading of a floating slab structure with embedded monoblock sleepers, Chalmers Concrete Structures, Report 98:10, Göteborg 1998, 8 pp

Rikard Gustavson: Concrete sleeper subjected to static loading - an experimental study, Chalmers Concrete Structures, Report 99:4, Göteborg 1999, 32 pp

Rikard Gustavson, Kent Gylltoft and Magnus Åkesson: Concrete sleepers for railways, Proceedings Nordic Concrete Research Meeting, Reykjavik August 1999, pp 196-198

Rikard Gustavson: Static and dynamic finite element analysis of concrete sleepers, Chalmers Concrete Structures, Licentiate Thesis, May 2000, 66 pp

Rikard Gustavson and Kent Gylltoft: Cracked sleepers influence on the global track responses - coupling of a linear track model and non-linear FE analyses (to appear in IMechE Journal of Rail and Rapid Transit)

Rikard Gustavson and Kent Gylltoft: Static and dynamic response of concrete sleepers (submitted to Nordic Concrete Research)

Rikard Gustavson: Steel-encased pull-through and push-in tests of indented three-wire strands, Report 01:2, Chalmers Concrete Structures, Gothenburg March 2001, 183 pp

Rikard Gustavson: Pull-through test of strands with various surface treatments and geometries, Report 01:6, Chalmers Concrete Structures, Gothenburg June 2001, 33 pp

Rikard Gustavson and Kent Gylltoft: Static and dynamic response of concrete sleepers, Nordic Concrete Research, publ 25, no 2, 2000, pp 49-66

Karin Lundgren and Rikard Gustavson: Examining bond by a combination of numerical modelling and tests, Proceedings Nordic Concrete Research Meeting, Elsinore (Denmark) June 2002, pp 63-65

Rikard Gustavson: Steel-encased pull-through tests of strands with various properties of the strand and the concrete, Chalmers Concrete Structures, Report 02:1, Gothenburg 2002, 205 pp

Rikard Gustavson: Bond behaviour of four types of strands in sleepers during release of prestress and loading, Chalmers Concrete Structures, Report 02:14, Gothenburg 2002, 152 pp

Karin Lundgren, Rikard Gustavson and Jonas Magnusson: Finite element modelling as a tool to understand the bond mechanisms, 8 pp. To be presented at the conference Bond in Concrete – from research to standards, Budapest (Hungary) November 2002

Karin Lundgren, Rikard Gustavson and Jonas Magnusson: Finite element modelling as a tool to understand the bond mechanisms, Proceedings Bond in Concrete – from Research  to Standards, Budapest (Hungary) November 2002, pp 27-34

Rikard Gustavson: Bond response of three-wire strands: influence of strand and concrete, ibidem, pp 119-126

Rikard Gustavson: Structural behaviour of concrete railway sleepers, Doctoral Dissertation, Chalmers Concrete Structures, Gothenburg November 2002, 157 pp (summary and five appended papers)

Rikard Gustavson and Kent Gylltoft: Influence of cracked sleepers on the global track response: coupling of a linear  track model and non-linerar FE analyses, IMechE Journal  of Rail and Rapid Transit, vol 216, no F1, 2002, pp 41-51

Rikard Gustavson: Experimental studies of the bond response of three-wire strands and some influencing parameters,  RILEM Publications – Materials and Structures(in press)

Rikard Gustavson and Karin Lundgren: Modelling of bond between three-wire strands and concrete (submitted to Magazine of Concrete Research)

MU6. Rolling contact fatigue of rails

Anders Johansson and Hans Thorberntsson: Elastoplastic material model with nonlinear kinematic hardening for rolling and sliding contact fatigue, MSc Thesis EX 1997:15, Chalmers Solid Mechanics, Gothenburg November 1997, 82 pp

Lars Broman and Andreas Larsson: Rolling contact fatigue - residual stresses due to contact loads and cross sectional forces, MSc Thesis EX 1997:16, Chalmers Solid Mechanics, Gothenburg November 1997, 46 pp

Jonas Ringsberg and Lennart Josefson: Assessment of conditions for initiation of cracks in railheads due to rolling contact fatigue of rails, Proceedings Fatigue '99, 7th International Fatigue Congress, Beijing (China) June 1999, pp 2597-2602

Magnus Ekh, Anders Johansson, Hans Thorberntsson and Lennart Josefson: Models for cyclic ratchetting plasticity - integration and calibration, ASME Journal of Engineering Materials and Technology, vol 122, no 1, 2000, pp 49-55, see also Chalmers Solid Mechanics, Report F 211, Göteborg 1999, 27 pp

Joakim Mattsson and Mattias Olsson: Rolling contact fatigue in rail heads - three-dimensional FE simulations of stresses and strains, MSc Thesis EX1999:12, Chalmers Solid Mechanics, Gothenburg 1999, 40 pp

Jonas Ringsberg, Marianne Loo-Morrey, Lennart Josefson, Ajay Kapoor and John Beynon: Prediction of fatigue crack initiation for rolling contact fatigue, International Journal of Fatigue, vol 22, no 3, 2000, pp 205-215, see also Chalmers Solid Mechanics, Report F 221, Gothenburg 1999, 20 pp

Jonas Ringsberg, Hans Bjarnehed, Anders Johansson and Lennart Josefson: Rolling contact fatigue of rails - FE-modelling of residual stresses, strains and crack initiation, IMechE Journal of Rail and Rapid Transit, vol 214, no F 1, 2000, pp 7-19

Jonas Ringsberg: Cyclic ratchetting and failure of a pearlitic rail steel, presented at 36th Annual Technical Meeting Society of Engineering Science, The University of Texas at Austin, Austin TX, October 1999. Full paper in Fatigue & Fracture of Engineering Materials & Structures, vol 23, no 9, 2000, pp 747-758

Lennart Mähler: Integration of model for cyclic ratchetting plasticity, Report rep1651, Frontec Research & Technology, Gothenburg 1999, 6pp

Lennart Mähler: Rullning av järnvägshjul på räl med materialmodell för ratchetting, Report rep1644, Frontec Research & Technology, Gothenburg 1999, 9 pp

Jonas Ringsberg: Rolling contact fatigue of railway rails with emphasis on crack initiation, Doctoral Dissertation, Chalmers Solid Mechanics, Gothenburg September 2000, 130 pp (summary and five appended papers)

Lennart Josefson, Thomas Svensson, Jonas Ringsberg, Thomas Gustafsson and Jacques de Maré: Fatigue life and crack closure in specimens subjected to variable amplitude loads under plane strain conditions, Engineering Fracture Mechanics, vol 66, no 6, 2000, pp 587-600

Torbjörn Lindbäck, Jonas Ringsberg, Mattias Olsson, Lennart Josefson and Mats Näsström: Rail rolling contact fatigue caused by heavy haul train transports in cold climates, Luleå Technical University, Department of Computer Aided Design, Luleå 2000, 18 pp

Jonas Ringsberg and Lennart Josefson: A method for prediction of fatigue crack initiation in railway rails, Proceedings 6th International Conference on Biaxial/Multiaxial Fatigue and Fracture, Lisboa June 2001, pp 477-484

Jonas Ringsberg: Rolling contact fatigue of railway rails with emphasis on crack inititation, Doctoral Dissertation, Chalmers Solid Mechanics, Gothenburg 2000, 130 pp (summary and five appended papers)

Jonas Ringsberg: Life prediction of rolling contact fatigue crack initiation, International Journal of Fatigue, vol 23, no 7, 2001, pp 575-586

Jonas Ringsberg and Lennart Josefson: Finite element analyses of rolling contact fatigue crack initiation in railheads, IMechE Journal of Rail and Rapid Transit, vol 215, no F4,  2001, pp 243-259

Jonas Ringsberg: Life prediction of rolling contact fatigue  crack initiation, International Journal of Fatigue, vol 23, no 7, 2001, pp 575-586

Jonas Ringsberg and Torbjörn Lindbäck: Rolling contact fatigue analysis of rails including numerical simulations of the rail manufacturing process and repeated wheel-rail contact loads, International Journal of Fatigue, vol 25, no 6, 2003, pp 547-558

MU7. Laser treatment of wheels and rails

Simon Niederhauser and Birger Karlsson: Microstructure and mechanical properties of laser cladded steel plates, 10th International Conference on Fracture (ICF), Honolulu HI, USA, December 2001, 6 pp on CD

Simon Niederhauser and Birger Karlsson: Microstructure and mechanical properties of laser cladded steel plates, 10th International Conference on Fracture (ICF), Honolulu HI, USA, December 2001, 6 pp

Simon Niederhauser: Mechanical properties of laser cladded steel plates for railway applications, Poster ASM/Juniormat, Lausanne (Switzerland) September 2002

Simon Niederhauser: Properties of laser cladded railway steel, Licentiate Thesis, Chalmers Materials Science and Engineering, Gothenburg February 2003, 51 pp (summary and two appended papers)

Simon Niederhauser and Birger Karlsson: Comparison of fatigue behaviour of Co-Cr cladded steel plates for railway applications, Proceedings 6th International Conference on Contact Mechanics and Wear of Rail/Wheel Systems (CM2003), Gothenburg June 2003, vol II, pp 567-572

Simon Niederhauser and Birger Karlsson: Mechanical properties of laser cladded steel, 17 pp (submitted for international publication)

Simon Niederhauser and Birger Karlsson: Fatigue behaviour of a Co-Cr laser cladded steel plates for railway applications, Wear (in print)

Simon Niederhauser, Birger Karlsson, and Peter Sotkovszki: Microstructural develop¬ment in the heat affected zone of a laser cladded steel, Zeitschrift für Metallkunde (accepted for publication)

Simon Niederhauser, Birger Karlsson and Peter Sotkovszki: Microstructural analysis of a Co-Cr clad (in manuscript)

Simon Niederhauser and Birger Karlsson: Mechanical properties and microstructure of a laser cladded steel plate (in manuscript)

Simon Niederhauser, Birger Karlsson and Peter Sotkovszki: Microstructural development in the heat-affected zone of a laser-cladded steel, Zeitschrift für Metallkunde, vol 96, 2005, pp 370-376

Simon Niederhauser and Birger Karlsson: Fatigue behaviour of Co-Cr laser cladded steel plates for railway applications, Wear, vol 258, 2005, pp 1156-1164

Simon Niederhauser, Birger Karlsson and Peter Sotkovszki: Microstructural study of a Co-Cr laser clad (submitted to Zeitschrift für Metallkunde)

Simon Niederhauser: Interface between a laser clad and its substrate (to be submitted for international publication)

Simon Niederhauser, Birger Karlsson and Peter Sotkovszki: Microstructure and fatigue properties of a Fe-12.5% Cr laser cladded steel plate (submitted to Materials Science and Technology)

Simon Niederhauser: Laser cladded steel − microstructures and mechanical properties of relevance for railway applications, Doctoral Dissertation, Chalmers Materials and Manufacturing, Gothenburg December 2005, 128 pp (introduction, summary and seven appended papers)

MU8. Butt-welding of rails

Jan Henrik Sällström: Literature survey on flash and thermite welding of rails, Frontec R&T and Chalmers Solid Mechanics, Gothenburg November 1999, 12 pp

Lennart Josefson, Anders Skyttebol and Jonas Ringsberg: Numerical simulation of welding operations in connection to railway rails, Document IIW-X/XIII/XV-RSDP-75-02 presented at IIW (International Institute of Welding) General Assembly, Copenhagen (Denmark) June 2002, 2 pp

Anders Skyttebol and Lennart Josefson: Numerical simulation of flash butt-welding of railway rails, Proceedings 7th International Seminar on Numerical Analysis of Weldability, GrazSeggau (Austria) September-October 2003, 21 pp (to appear)

Anders Skyttebol, Lennart Josefson and Jonas Ringsberg: Fatigue crack growth in a welded rail under the influence of residual stresses, Engineering Fracture Mechanics (special issue on fracture mechanics of railway components, to appear)

Anders Skyttebol: Models for high temperature recovery in welding simulations, Research Report 2004:9, Chalmers Applied Mechanics, Gothenburg, 15 pp

Anders Skyttebol, Peter Sotkovszki, Lennart Josefson and Hans Johansson: Microstructural evaluation and mechanical properties of the welded zone in flash-butt welded rails (submitted to Science and Technology of Welding and Joining), 17 pp

Anders Skyttebol: Continuous welded railway rails - residual stress analyses, fatigue assessments and experiments, Doctoral Dissertation, Chalmers Applied Mechanics, Gothenburg September 2004, 219 pp (summary and six appended papers)

MU9. Rolling contact fatigue of railway wheels

Elena Kabo and Anders Ekberg: Fatigue initiation in railway wheels - on the influence of defects (to appear in Wear). Also presented at 5th International Conference on Contact Mechanics and Wear of Wheel/Rail Systems in Tokyo, Japan, July 25-28, 2000

Anders Ekberg, Elena Kabo and Hans Andersson: Predicting rolling contact fatigue of railway wheels, Chalmers Solid Mechanics, Report F232, Gothenburg 2001, 7 pp (presented at 13th International Wheelset Congress in Rome, September 17-21, 2001)

Anna Hansson: Contact mechanics - exploring some limitations of Hertzian theory, MSc Thesis EX 2001:3, Chalmers Solid Mechanics, Gothenburg April 2001, 23 pp

Anders Ekberg, Elena Kabo and Hans Andersson: An engineering model for rolling contact fatigue (accepted for publication in Fatigue & Fracture of Engineering Materials & Structures)

Anders Ekberg, Elena Kabo and Hans Andersson: Predicting rolling contact fatigue of railway wheels, Proceedings 13th International Wheelset Congress, Rome (Italy), September 2001, 7 pp

Elena Kabo: Material defects in rolling contact fatigue of railway wheels – influence of overloads and defect clusters, International Journal of Fatigue, vol 24, no 8, 2002, pp 887-894

Anders Ekberg and Roger Lundén: Rolling contact fatigue of railway wheels – towards validation of a predictive model, Proceedings of the 8th International Fatigue Congress FATIGUE ´2002, Stockholm (Sweden) June 2002, EMAS Higher Education Press, vol 2, pp 843-850

Anders Ekberg: Surface cracks in rolling contact – a brief review with focus on railway wheels, Chalmers Applied Mechanics, Gothenburg 2002 (in preparation)

Elena Kabo and Anders Ekberg: Fatigue initiation in railway wheels – a numerical study of the influence of defects, Wear, vol 253, nos 1-2, 2002, pp 26-34

Anders Ekberg, Elena Kabo and Hans Andersson: An engineering model for prediction of rolling contact fatigue of  railway wheels, Fatigue & Fracture of Engineering Materials  & Structures, vol 25, no 10, 2002, pp 899-909

Anders Ekberg and Elena Kabo: Rolling contact fatigue of railway wheels and rails – an overview, Proceedings Rolling Contact Fatigue: Applications and Development, Brescia (Italy) November 2002, pp 5-26

Elena Kabo and Anders Ekberg: The influence of defects  in rolling contact fatigue, ibidem, pp 85-93

Elena Kabo and Anders Ekberg: Material defects in rolling contact fatigue of railway wheels – the influence of defect size, Proceedings 6th International Conference on Contact Mechanics and Wear of Rail/Wheel Systems (CM2003), Gothenburg June 2003, vol I, pp 119-125

Anders Ekberg and Elena Kabo: Rolling contact fatigue of railway wheels and rails – an overview, ibidem, Appendix II,  pp 11-24

Anders Ekberg, Elena Kabo and Jens Nielsen: Integrating rolling contact fatigue analysis with simulation of dynamic  train-track interaction, Proceedings 3rd International Conference “XXICentury Rolling Stock (ideas, requirements, projects)”, St Petersburg (Russia) July 2003, 11 pp

Anders Ekberg and Elena Kabo: Rolling contact fatigue of railway wheels and rails – an overview (previously announced conference paper now accepted for publication in Wear)

Anders Ekberg, Elena Kabo and Hans Andersson: Answer to a letter to the editor from M Ciavarella and H Maitournam, Fatigue & Fracture of Engineering Materials & Structures, vol 27, no 6, 2004, pp 527–528

Jens Nielsen, Anders Ekberg, Elena Kabo and Roger Lundén: Integrated analysis of dynamic train–track interaction and rolling contact fatigue, Proceedings 14th International Wheelset Congress, Orlando FL, USA, October 2004, 15 pp on CD (this paper was announced in the previous semi-annual report)

Jens Nielsen, Anders Ekberg and Roger Lundén: Influence of short-pitch wheel/rail corrugation on rolling contact fatigue, Chalmers Applied Mechanics, Gothenburg December 2004, 30 pp (submitted for international publication. Also listed under project TS8)

Anders Ekberg: Report on flange wear of timber wagons in Sweden, Chalmers Industriteknik (CIT), Gothenburg August 2004, 9 pp (restricted availability)

Jens Nielsen, Anders Ekberg and Roger Lundén: Influence of short-pitch wheel/rail corrugation on rolling contact fatigue, IMechE Journal of Rail and Rapid Transit (new title of previously announced paper; accepted for publication). Also listed under project TS8

Anders Ekberg: Report on multiaxial fatigue evaluation of railway axles, Chalmers Applied Mechanics, Gothenburg 2005, 5 pp (classified) 

Anders Ekberg: Hjulskador på papperstransportvagnar (Wheel damage on freight wagons for paper, in Swedish), Chalmers Applied Mechanics, Gothenburg 2005, 13 pp (classified)

Anders Ekberg: Besök hos MTAB/LKAB i Kiruna (Visit to MTAB/LKAB in Kiruna, in Swedish), Chalmers Applied Mechanics, Gothenburg 2005, 9 pp (classified)

Jens Nielsen, Anders Ekberg and Roger Lundén: Influence of short-pitch wheel/rail corrugation on rolling contact fatigue, IMechE Journal of Rail and Rapid Transit, vol 219, no F3, 2005, pp177–187 (also listed under project TS8)

Elena Kabo, Jens Nielsen and Anders Ekberg: Prediction of dynamic train-track interaction and subsequent material deterioration, 19th IAVSD Symposium, Three Page abstracts, Milan (Italy) August– September 2005, 3 pp (available on CD. Also listed under project TS8)

Elena Kabo, Jens Nielsen and Anders Ekberg: Prediction of dynamic train-track interaction and subsequent material deterioration in the presence of insulated rail joints (submitted to Vehicle System Dynamics. Also listed under project TS8)

Elena Kabo, Jens Nielsen and Anders Ekberg: Prediction of dynamic train-track interaction and subsequent material deterioration in the presence of insulated rail joints, Vehicle System Dynamics (in press. Also listed under project TS8. This paper was announced in the previous semi-annual report) 

Robert Fröhling, Anders Ekberg and Elena Kabo: Developing hollow wear limits based on field experience and numerical simulations (to be presented at 7th International Conference on Contact Mechanics and Wear of Rail/Wheel Systems (CM2006), Brisbane (Australia) September 24-27, 2006) 

Tord Karlsson, Andrea Ghidini, Andrea Gianni and Anders Ekberg: Innovative bainitic steel grade for solid wheels tested in arctic heavy haul operations (to be presented at 7th International Conference on Contact Mechanics and Wear of Rail/Wheel Systems (CM2006), Brisbane (Australia) September 24-27, 2006) 

Björn Paulsson, Martin Platzer and Anders Ekberg: INNOTRACK – Innovative Track System – a unique approach from infrastructure managers and competitive track supply industry to develop the innovative products of the future, Poster at 7th World Congress on Railway Research, Montreal June 2006 

Anders Ekberg, Tore Vernersson and Roger Lundén: Iron Ore Line, Kiruna, Sweden: Risk of cracking of locomotive wheels due to very high thermal brake powers, Chalmers Applied Mechanics, Gothenburg 2006, 21 pp (availability restricted) 

Tore Vernersson and Anders Ekberg: Iron Ore Line, Kiruna, Sweden: Comparison of field measurements to numerical simulations, Chalmers Applied Mechanics, Gothenburg 2006, 5 pp (availability restricted)

MU10. Crack propagation in railway wheels

Eka Lansler and Elena Kabo: Sub-surface crack face displacements in railway wheels, Proceedings 6th International Conference on Contact Mechanics and Wear of Rail/Wheel Systems (CM2003), Gothenburg June 2003, vol II, pp 369-375

Eka Lansler and Elena Kabo: Subsurface crack face displacements in railway wheels, Wear, vol 258, no 7-8, pp 1038-1047

Eka Lansler: Subsurface rolling contact fatigue cracks in railway wheels – elastoplastic deformations and mechanisms of propagation, Licentiate Thesis, Chalmers Applied Mechanics, Gothenburg December 2004, 60 pp (summary and two appended papers)

Eka Lansler, Anders Ekberg, Elena Kabo and Hans Andersson: The influence of plastic deformations on growth of subsurface rolling contact fatigue cracks in railway wheels, IMechE Journal of Rail and Rapid Transit (accepted for publication. This paper was announced in a previous semi-annual report)

Anders Ekberg, Elena Kabo, Jens Nielsen and Roger Lundén: Subsurface initiated rolling contact fatigue of railway wheels as generated by rail corrugation, Chalmers Applied Mechanics, Gothenburg 2006 (submitted for international publication. Also listed under project TS8)

Alejandro Martinez: Cross-sectional cracks in rails – evaluation of stress intensity factors, MSc Thesis 2006:16, Chalmers Applied Mechanics / Division of Material and Computational Mechanics, Gothenburg 2006, 47 pp

Roger Lundén: Elastoplastic modelling of subsurface crack growth in rail/wheel contact problems, Chalmers Applied Mechanics, Gothenburg 2006 (submitted to Fatigue & Fracture of Engineering Materials & Structures) 

Robert Fröhling, Anders Ekberg and Elena Kabo: Developing hollow wear limits based on field experience and numerical simulations, Proceedings 7th International Conference on Contact Mechanics and Wear of Rail/Wheel Systems (CM2006), Brisbane (Australia) September 2006, vol 2, pp 599-607 (revised version submitted to Wear)

Tord Karlsson, Andrea Ghidini, Andrea Gianni and Anders Ekberg: Innovative bainitic steel grade for solid wheels tested in arctic heavy haul operations, Proceedings 7th International Conference on Contact Mechanics and Wear of Rail/Wheel Systems (CM2006), Brisbane (Australia) September 2006, vol 1, pp 303-308 (revised version submitted to Wear)

Andrea Gianni, Tord Karlsson, Andrea Ghidini and Anders Ekberg: Bainitic steel grade for solid wheels: metallurgical, mechanical and in-service testing, Proceedings  International Heavy Haul Association Specialist Technical Session (IHHA2007), Kiruna (Sweden) 11-13 June 2007, pp 701-711

Anders Ekberg, Elena Kabo, Jens Nielsen and Roger Lundén: Subsurface initiated rolling contact fatigue of railway wheels as generated by rail corrugation, International Journal of Solids and Structures (accepted for publication. Also listed under project SP11)

MU11. Early crack growth in rails

Jonas Ringsberg: Modelling the behaviour of short crack propagation in rails, Proceedings of the 8th International Fatigue Congress FATIGUE ´2002, Stockholm (Sweden) June 2002, EMAS Higher Education Press, vol 5, pp 3015–3022

Jonas Ringsberg and Anders Bergkvist: A study on the behaviour of short surface-breaking cracks, Proceedings Workshop on the Application of Fracture Mechanics to Railway Components, GKSS, Geesthacht (Germany) April 2003, 2 pp (abstract only)

Jonas Ringsberg: Shear mode growth of short surface-breaking RCFcracks, Proceedings 6th International Conference on Contact Mechanics and Wear of Rail/Wheel Systems (CM2003), Gothenburg June 2003, vol I, pp 29-38

Jonas Ringsberg and Anders Bergkvist: On propagation of short rolling contact fatigue cracks, Fatigue & Fracture of Engineering Materials & Structures, vol 26, no 10, 2003, pp 969-983

Anders Bergkvist: On the crack driving force in elastic-plastic fracture mechanics with application to rolling contact fatigue in rails, Licentiate Thesis 2005:20, Chalmers Applied Mechanics, Gothenburg June 2005, 73 pp (including one appended paper)

Johan Tillberg: Computation of the crack-driving force in elastic-plastic materials – a comparative study, MSc Thesis 2005:65, Chalmers Applied Mechanics, Gothenburg December 2005, 44 pp

MU12. Contact and crack mechanics for rails

Per Heintz: Adaptive goal-oriented finite element computation of the energy release rate at crack growth, MSc Thesis EX2001:9, Chalmers Applied Mechanics, Gothenburg 2001, 58 pp

Per Heintz, Fredrik Larsson, Peter Hansbo and Kenneth Runesson: On error control and adaptivity for computing material forces in fracture mechanics (invited paper), Proceedings 5th World Congress on Computational Mechanics (WCCM V), Vienna (Austria) July 2002, ISBN3-9501554-0-6, http://wccm.tuwien.ac.at, 10 pp

Per Heintz and Klas Samuelsson: On adaptive strategies and error control in fracture mechanics, Computers & Structures, vol 82, pp 485-497, 2004

Per Heintz, Fredrik Larsson, Peter Hansbo and Kenneth Runesson: On adaptive strategies and error control for computing material forces in fracture mechanics, International Journal for Numerical Methods in Engineering, vol 60, pp 1287-1299, 2004

Per Heintz and Peter Hansbo: A stabilized Lagrange multiplier method for contact phenomena, Proceedings 6th International Conference on Contact Mechanics and Wear of Rail/Wheel Systems (CM2003), Gothenburg June 2003, vol I, pp 253-257

Per Heintz and Peter Hansbo: Consistent and inconsistent Lagrange multiplier methods for the finite element solution  of unilateral contact problems using non-matching meshes, Presented at 7th US National Congress on Computational Mechanics, Albuqerque NM,USA, July 2003, 1p (abstract only)

Per Heintz: On computational contact and fracture mechanics, Licentiate Thesis, Chalmers Applied Mechanics, Gothenburg December 2003, 70 pp (summary and three appended papers)

Per Heintz and Peter Hansbo: A discontinuous Galerkin method for crack propagation, Book of Abstracts 4th European Congress on Computational Methods in Applied Sciences and Engineering (ECCOMAS 2004), Jyväskylä (Finland) July 2004, vol II, p 461

Per Heintz and Peter Hansbo: Stabilized Lagrange multiplier methods for elastic contact, Computer Methods in Applied Mechanics and Engineering, vol 195, pp 4323-4333, 2006

Per Heintz: On the numerical modelling of quasi-static crack growth in linear elastic fracture mechanics, International Journal for Numerical Methods in Engineering, vol 65, pp 174--189, 2006

Per Heintz and Peter Hansbo: A stabilized Lagrange multiplier method for elastic contact with friction, Proceedings 8th US National Congress on Computational Mechanics, Austin (TX) July 2005 (abstract 1 p available on CD)

Per Heintz and Peter Hansbo: Stabilized Lagrange multiplier methods for bilateral contact with friction, Computer Methods in Applied Mechanics and Engineering, vol 195, 2006, pp 4323-4333 (this paper was announced in the previous semi-annual report) 

Per Heintz: On the numerical modelling of quasi-static crack growth in linear elastic fracture mechanics, International Journal for Numerical Methods in Engineering, vol 65, 2006, pp 174-189 (this paper was announced in a previous semi-annual report)

Peter Hansbo and Per Heintz: Finite element modeling of cohesive cracks by Nitsche's method, presented at 16th European Conference on Fracture (ECF16), Alexandroupolis (Greece) July 2006. Abstract in Fracture of Nano and Engineering Materials and Structures (edited by E E Gdoutos), Springer, Berlin 2006, p 947 (full paper on CD)

Per Heintz:  Finite element procedures for the numerical simulation of crack propagation and bilateral contact, Doctoral Dissertation, Chalmers Applied Mechanics, Gothenburg September 2006, 103 pp (introduction, summary and five appenden papers)

MU13. Wheel and rail materials at low temperatures

Johan Ahlström and Birger Karlsson: Fatigue behaviour of  rail steel – a comparison between strain and stress controlled loading, Proceedings 6th International Conference on Contact Mechanics and Wear of Rail/Wheel Systems, Gothenburg  June 2003, vol II, pp 541-546

Johan Ahlström, Birger Karlsson and Michael Mirsch: Low cycle fatigue behaviour of railway wheel steels including temperature effects, abstract submitted to International Conference on Fracture (ICFII), Turin (Italy), March 2005

Johan Ahlström and Birger Karlsson: Fatigue behaviour of rail steel – a comparison between strain and stress controlled loading, Wear (accepted for publication)

Johan Ahlström, Birger Karlsson and Michael Mirsch: Low cycle fatigue behaviour of railway wheel steels including temperature effects, Extended Abstract submitted to 11th International Conference on Fracture (ICF11), Turin (Italy) March 2005 (accepted; this paper was announced in the previous semi-annual report)

Johan Ahlström and Birger Karlsson: Fatigue behaviour of rail steel – a comparison between strain and stress controlled loading, Wear (in print; this paper was announced in the previous semi-annual report)

Göran Johansson, Johan Ahlström and Magnus Ekh: Parameter identification and modeling of large ratcheting strains in carbon steel (submitted to Computers and Structures). Also listed under project MU14

Johan Ahlström, Birger Karlsson and Michael Mirsch: Low cycle fatigue behaviour of railway wheel steels including temperature effects, Proceedings 11th International Conference on Fracture (ICF11), Turin (Italy) March 2005, 6 pp on CD

Johan Ahlström and Birger Karlsson: Fatigue behaviour of rail steel – a comparison between strain and stress controlled loading, Wear, vol 258, 2005, pp 1187-1193

Alexander Timmer: Investigation of the microstructure and temperature impact on the low cycle fatigue behaviour of a medium carbon, low alloyed railway wheel steel, Project Report, Chalmers Materials and Manufacturing Technology, Gothenburg 2006, 62 pp 

Johan Ahlström and Birger Karlsson: The fatigue properties of modified railway wheel steels as influenced by low temperature and grain size, Proceedings 9th International Fatigue Congress (IFC9), Atlanta GA (USA) May 2006, 10 pp (on CD) 

Niklas Köppen, Johan Ahlström and Birger Karlsson: Static and cyclic behaviour of near fully pearlitic railway steel – influence of temperature and prestrain, Proceedings 9th International Fatigue Congress (listed under project MU16)

MU14. Damage in track switches

Göran Johansson, Magnus Ekh and Kenneth Runesson: Computational modeling of inelastic large ratcheting strains, International Journal of Plasticity (accepted for publication)

Göran Johansson: Constitutive modeling of large ratcheting strains in carbon steel, Licentiate Thesis, Chalmers Applied Mechanics, Gothenburg June 2004, 62 pp (summary and two appended papers)

Göran Johansson, Johan Ahlström and Magnus Ekh: Parameter identification and modeling of large ratcheting strains in carbon steel (submitted to Computers and Structures). Also listed under project MU13

Göran Johansson, Andreas Menzel and Kenneth Runesson: Modeling of anisotropic inelasticity in pearlitic steel at large strains due to deformation induced substructure evolution, European Journal of Mechanics – A/Solids, vol 24, 2005, pp 899-918

Göran Johansson and Magnus Ekh: Modeling of large ratcheting strains with large time increments, Proceedings 8th International Conference on Computational Plasticity, COMPLAS2005, Barcelona (Spain) September 2005, pp 763-765

Göran Johansson and Alexander Santos: Measurements of geometry changes in railway turnout components, Research Report 2005:7, Chalmers Applied Mechanics, Gothenburg 2005, 12 pp 

Göran Johansson: Simulation of damage in railway turnout components, Research Report 2005:8, Chalmers Applied Mechanics / Division of Material and Computational Mechancs, Gothenburg 2006, 15 pp 

Göran Johansson: On the non-oscillation criterion for multiplicative anisotropic plasticity at large simple shear deformation, Chalmers Applied Mechanics / Division of Material and Computational Mechanics, Gothenburg 2006 (submitted for international publication) 

Göran Johansson and Magnus Ekh: On the modeling of evolving anisotropy and large strains in pearlitic steel, European Journal of Mechanics – A/Solids, vol 25, no 6, pp 1041-1060

Göran Johansson: On the modeling of large ratcheting strains and anisotropy in pearlitic steel, Doctoral Dissertation, Chalmers Applied Mechanics, Gothenburg September 2006, 169 pp (introduction, summary and five appended papers)

Göran Johansson and Magnus Ekh: Modeling of large ratcheting strains with large time increments, Engineering Computations, vol 24, no 3, 2007, pp 221-236

Göran Johansson: ABAQUS-UMAT implementation of a large strain hyper-elastoplastic model with kinematic hardening, Research Report 2008:01, Chalmers Applied Mechanics, Gothenburg 2008, 11 pp

MU15: Microstructural development during laser coating

Alexandre Gorski: Tempering of rail and railway-wheel  steels, MSc Thesis EX16/2002, Chalmers Materials Science and Engineering, Gothenburg 2002, 42 pp + Appendix 13 pp

Johan Ahlström, Birger Karlsson and Simon Niederhauser: Modelling of laser cladding of medium carbon steel – a first approach, Proceedings 2nd International Conference on  Thermal Process Modelling and Computer Simulation, Nancy (France) March-April 2003, 8 pp. This report is under review for inclusion in Journal de Physique IV

Johan Ahlström, Birger Karlsson and Simon Niederhauser: Modelling of laser cladding of medium carbon steel - a first approach, Journal de Physique IV, vol 120, 2005, pp 405-412

Peter Krahl: Short time tempering behaviour of martensite in steel, Project Thesis 25/2004, Chalmers Materials Science and Engineering, Gothenburg 2004, 45 pp

MU16: Alternative materials for wheels and rails

Niklas Köppen, Johan Ahlström and Birger Karlsson: The effect of prestrain on fatigue properties of rail¬way materials at low climatic temperatures, abstract submitted to International Conference on Fracture (ICF11), Turin (Italy), March 2005

Niklas Köppen, Johan Ahlström and Birger Karlsson: Static and cyclic behaviour of near fully pearlitic railway steel – influence of temperature and prestrain, Proceedings 9th International Fatigue Congress (IFC9), Atlanta GA (USA) May 2006, 8 pp (on CD. Also listed under project MU13) 

Niklas Köppen and Birger Karlsson: Tensile deformation behaviour of near fully pearlitic steels at various temperatures and strain rates (submitted to Metallurgical and Materials Transactions A)

Niklas Köppen: Deformation behaviour of near fully pearlitic steels during monotonic and cyclic loading, Licentiate Thesis, Chalmers Materials and Manufacturing Technology, Gothenburg November 2006, 66 pp (introduction, summary and two appended papers)

Peter Krahl: Fatigue properties of a martensitic steel for use in highly stressed railway components, MSc Thesis 100/2007, ISSN 1652-8913, Chalmers Materials and Manufacturing Technology, Gothenburg 2007, 43 pp

Samuel Österberg: Fatigue properties of an austenitic Mn-steel for use in highly stressed railway components, MSc Thesis 101/2007, ISSN 1652-8913, Chalmers Materials and Manufacturing Technology, Gothenburg 2007, 34 pp

Johan Ahlström and Birger Karlsson: Modified railway wheel steels – production and evaluation of mechanical properties with emphasis on low cycle fatigue behaviour (submitted for publication)

Johan Ahlström and Birger Karlsson: Low cycle fatigue behaviour of alternative steels for highly stressed rail components, Proceedings 6th International Conference on Low Cycle Fatigue (LCF6), Berlin (Germany) September 2008, 6 pp (so far only available on CD)

Magnus Hörnqvist, Birger Karlsson and Johan Ahlström: Unloading stiffness of near fully pearlitic steel UIC-R8/R8T during cyclic plastic straining, ibidem, 6 pp (so far only available on CD)

MU17. Elastoplastic crack propagation in rails

Johan Tillberg, Fredrik Larsson and Kenneth Runesson: Elastoplastic fracture mechanics with application to fatigue crack propagation in rails, Proceedings  Svenska Mekanikdagar 2007, Luleå (Sweden) 13-15 June 2007, p 4:20

Johan Tillberg and Fredrik Larsson: On the role of material dissipation for the crack-driving force, Proceedings  20th Nordic Seminar on Computational Mechanics (NSCM-20), Gothenburg 23-24 November 2007, 4 pages

Johan Tillberg: Multiple crack interaction with RCF loading, 15th Nordic Seminar on Railway Technology, Hook (Sweden) May 2008, 1+12 pp (Summary and PowerPoint presentation. Available on CD)

Johan Tillberg: Elastic-plastic fracture mechanics and RCF in rails, Licentiate Thesis, Chalmers Applied Mechanics, June 2008, 70 pp (introduction, summary and two appended papers)

MU18. Wheels and rails at high speeds and axle loads

Johan Sandström and  Anders Ekberg: Predicting crack growth and risks of rail breaks due to wheelflat impacts in heavy haul operations, Proceedings International Heavy Haul Association Specialist Technical Session (IHHA 2007), Kiruna (Sweden) 11-13 June 2007, pp 379-388

Johan Sandström, Anders Ekberg and Elena Kabo: Isolerskarvar – jämförelse mellan 4 mm och 8 mm skarvöppning (Insulated rail joints – a comparison between IRJ widths of 4 mm and 8 mm; in Swedish), progress report to Banverket, 6 pp

Johan Sandström: Low-cycle fatigue assessment of insulated rail joints from numerical simulations featuring contact and non-linear plastic hardening, Proceedings 20th Nordic Seminar on Computational Mechanics (NSCM-20), Gothenburg 23-24 November 2007, 3 pp

Johan Sandström: Tracks and wheels for higher speeds and axle loads on Swedish railways, 15th Nordic Seminar on Railway Technology, Hook (Sweden) May 2008, 1+22 pp (Summary and PowerPoint presentation. Available on CD)

Johan Sandström and Anders Ekberg: A numerical study of the mechanical deterioration of insulated rail joints (Submitted for international publication. Also listed under project EU10)

MU20. Wear impact on RCF of rails

Jim Brouzoulis: Crack progation in linear elasticity based on the concept of material forces, MSc Thesis 2007:60, Chalmers Applied Mechanics, Gothenburg 2007, 45 pp

Jim Brouzoulis, Fredrik Larsson, Johan Tillberg and Kenneth Runesson: Crack progation in linear elasticity based on the concept of material forces, Proceedings 20th Nordic Seminar on Computational Mechanics (NSCM-20), Gothenburg 2007, 3 pp

Jim Brouzoulis: Fatigue crack propagation in rails, 15th Nordic Seminar on Railway Technology, Hook (Sweden) May 2008, 1+27 pp (Summary and PowerPoint presentation. Available on CD)

MU21. Thermal impact on RCF of wheels

Håkan Hansson and Anders Ekberg: Thermal impact on RCF of wheels, 15th Nordic Seminar on Railway Technology, Hook (Sweden) May 2008, 1+18 pp (Summary and PowerPoint presentation. Available on CD)

MU22. Improved criterion for surface initiated RCF

Anders Ekberg, Elena Kabo, Jens Nielsen and Roger Lundén: Subsurface initiated rolling contact fatigue of railway wheels as generated by rail corrugation, International Journal of Solids and Structures, vol 44, 2007, pp 7975–7987

Roger Lunden: Elastoplastic modelling of subsurface crack growth in rail/wheel contact problems, Fatigue & Fracture of Engineering Materials & Structures, vol 30, no 10, 2007, pp 905-914

Robert Fröhling, Anders Ekberg and Elena Kabo: The detrimental effects of hollow wear
- field experiences and numerical simulations, Wear, vol 265, nos 9-10, 2008, pp 1283-1291

Andrea Gianni, Tord Karlsson, Andrea Ghidini and Anders Ekberg: Bainitic steel grade for solid wheels: metallurgical, mechanical and in-service testing, IMechE Journal of Rail and Rapid Transit (accepted for publication)

Björn Paulsson and Roger Lundén: State of-the-Art Research – Introduction, in Wheel/Rail Interface Handbook (editors Roger Lewis and Ulf Olofsson), Woodhead Publishing, Cambridge (UK) (in press)

MU23. Material behaviour at rapid thermal processes

MU24. High-strength steels for rails

Johan Ahlström, Birger Karlsson, Martin Schilke and Krste Cvetkovski: Materialteknisk forskning inom CHARMEC – stål i hjul, räler och växlar (Research in material technology within CHARMEC – steel in wheels, rails and switches; in Swedish), 15th Nordic Seminar on Railway Technology, Hook (Sweden) May 2008, 1+12 pp (Summary and PowerPoint presentation. Available on CD)

SD1. Braking of freight trains - a systems approach

Daniel Thuresson: Thermomechanical analysis of friction brakes, Proceedings 2000 Brake Colloquium and Engineering Display, SAE\P-00/358, San Diego CA October 2000, pp 149-160

Daniel Thuresson: Thermo-mechanical behaviour of sliding contact, Licentiate Thesis, Chalmers Machine and Vehicle Design, Gothenburg May 2001, 77 pp (summary and two appended papers)

Daniel Thuresson: Influence of material properties on sliding contact braking applications, Chalmers Machine and Vehicle Design, Gothenburg 2001, 17 pp (submitted for international publication)

Daniel Thuresson: Influence of material properties on sliding contact braking applications, Wear, vol 257, nos 5-6, 2004, pp 451-460 

Daniel Thuresson: Stability of sliding contact – comparison of a pin and a finite element model, Chalmers Applied Mechanics, Gothenburg 2005, 20 pp (submitted for international publication)

Daniel Thuresson: A pin model and full scale testing of a block brake, Chalmers Applied Mechanics, Division of Mechanical Systems, Gothenburg 2006

Daniel Thuresson: Stability of sliding contact – comparison of a pin and a finite element model, Wear, vol 261, nos 7-8, 2006, pp 896-904

Daniel Thuresson: A pin model and full scale testing of a block brake, Chalmers Applied Mechanics, Gothenburg 2006, 33 pp

Daniel Thuresson: Thermomechanics of block brakes, Doctoral Dissertation, Chalmers Applied Mechanics, Gothenburg October 2006, 156 pp (introduction, summary and four appended papers)

SD2. Sonar pulses for braking control - a prestudy

Hans Sandholt and Bengt Schmidtbauer: On sonar transmission through the train brake system: phase 1 - literature and baseline models, Chalmers Mechatronics, Report I-98/004, Gothenburg 1998, 10 pp

Hans Sandholt: On sonar transmission through the train brake system: progress report 1, Chalmers Mechatronics, Report I-98/005, Gothenburg 1998, 5 pp

Hans Sandholt and Bengt Schmidtbauer: On sonar transmission through the train brake system: progress report 2, Chalmers Mechatronics, Report I-99/001, Gothenburg 1999, 11 pp

Hans Sandholt: On sonar transmission through the train brake system: experimental notes from the tests on cargo wagons at SweMaint, Chalmers Mechatronics, Report I-99/002, Gothenburg 1999, 5 pp

Hans Sandholt and Bengt Schmidtbauer: On sonar transmission through the train brake system: test report from tests at SAB WABCO in Piossasco/Italy, Chalmers Mechatronics, Report I-99/003, Gothenburg 1999, 19 pp

Hans Sandholt: On sonar transmission through the train brake system - a noise characterizing experiment, Chalmers Mechatronics, Report I-00/001, Gothenburg 2000, 5 + 99 pp

Hans Sandholt and Bengt Schmidtbauer: Sonar transmission through the train brake system: final report of prestudy (phase 2), Chalmers Mechatronics, Report I-00/002, Gothenburg 2000, 9 pp

SD3. Computer control of braking systems for freight trains

Roger Johansson: Dependability characteristics and safety criteria for an embedded distributed brake control system  in railway freight trains, Report no 8, Chalmers Lindholmen University College (Electrical and Computer Engineering), Gothenburg 2001, 16 pp

Roger Johansson and Jan Torin: On calculating guaranteed message response times on the SAE J1939 bus, Chalmers Lindholmen University College (Electrical and Computer Engineering), Report no 10, 9 pp

Roger Johansson, Per Johannessen, Kristina Forsberg, Håkan Sivencrona and Jan Torin: On communication requirements  for control-by-wire applications, Proceedings 21st International System Safety Conference 2003 (ISSC21), Ottawa (Canada) August 2003, pp 1123-1132

Roger Johansson: Time and event triggered communication scheduling for automotive applications, Report no 17, Chalmers Lindholmen University College (Electrical and Computer Engineering), Gothenburg September 2004, 18 pp

Roger Johansson: A fault-tolerant architecture for computer-based railway vehicle brake systems, IMechE Journal of Rail and Rapid Transit, vol 218, no F3, 2004, pp 189-201 (this paper was announced in the previous semi-annual report)

Roger Johansson and Per Johannessen: GAST – General application development boards for safety critical time-triggered systems, Proceedings 22st International System Safety Conference (ISSC22), Providence RI, USA, August 2004, pp 32-39

Roger Johansson: Time and event triggered communication scheduling for the CAN bus, 37 pp (submitted to Journal of Network & Computer Applications)

Roger Johansson: On future computer based train vehicle control systems, 26 pp (submitted to Transportation Research Part C: Emerging Technologies)

Roger Johansson and Sverker Steen: An implementation of brake-by-wire in railway cars, 29 pp (submitted to Journal of Systems Architecture)

Roger Johansson: On distributed control-by-wire systems for critical applications, Doctoral Dissertation, Chalmers Computer Science and Engineering, Gothenburg June 2005, 175 pp (summary and seven appended papers)

SD4. Control of block braking

Tore Vernersson: Control of railway block braking - thermomechanical performance of wheels: a literature survey, Chalmers Applied Mechanics, Research Report 2002:6, Gothenburg 2002, 71 pp

Jens Nielsen, Roger Lundén, Anders Johansson and Tore Vernersson: Train-track interaction and mechanisms of irregular wear on wheel and rail surfaces, Vehicle System Dynamics, vol 40, nos 1-3, 2003, pp 3-54. Presented as an invited Keynote Lecture at the 18th International Symposium Dynamics of Vehicles on Roads and Tracksin Atsugi, Kanagawa (Japan) August 2003

Tore Vernersson: Thermal modelling of railway tread braking, Chalmers Applied Mechanics, Gothenburg 2004 (in preparation; to be submitted for international publication)

Tore Vernersson: Temperatures at railway tread braking - Part 1: Modelling, Chalmers Applied Mechanics, Gothenburg 2005 (to be submitted for international publication)

Tore Vernersson: Temperatures at railway tread braking - Part 2: Calibration and numerical examples, Chalmers Applied Mechanics, Gothenburg 2005 (in preparation; to be submitted for international publication)

Tore Vernersson and Roger Lundén: Tread braking of railway wheels – wheel and block temperatures and the influence of rail chill, Proceedings 8th International Heavy Haul Conference (IHHC8), Rio de Janeiro (Brazil) June 2005, pp 253-260

Tore Vernersson: Block wear and estimated brake power on the Coal Link: Conventional vs BFCB rigging, Chalmers Applied Mechanics, Gothenburg 2005, 5 pp 

Tore Vernersson: Temperatures at railway tread braking – Part 1: Modelling (submitted to Journal of Rail and Rapid Transit)

Tore Vernersson: Temperatures at railway tread braking – Part 2: Calibration and numerical examples (submitted to IMechE Journal of Rail and Rapid Transit)  

Tore Vernersson and Roger Lundén: Temperatures at railway tread braking – Part 3: Wheel and block temperatures and the influence of rail chill (submitted to IMechE Journal of Rail and Rapid Transit)  

Tore Vernersson: Tread braking of railway wheels – noise-related tread roughness and dimensioning wheel temperatures: field tests, rig measurements and numerical simulations, Doctoral Dissertation, six appended papers)

SD5. Active and semi-active systems in railway vehicles

Jessica Fagerlund, Jonas Sjöberg and Thomas Abrahamsson: Passive railway car secondary suspension – force, power, deflections, roll and comfort, Chalmers Signals and Systems, Gothenburg 2005, 28 pp (restricted availability)

Jessica Fagerlund, Jonas Sjöberg and Thomas Abrahamsson: Briefly on passive railway car secondary suspension – force, power, deflection, roll and comfort, Mekatronikmöte, Halmstad November 2005, 3 pp

SD6. Adaptronics for bogies and other railway components

SD8. Wear of disc brakes and block brakes

Tore Vernersson and Roger Lundén: Temperatures at railway tread braking – a parametric study, 15th Nordic Seminar on Railway Technology, Hook (Sweden) May 2008, 1+21 pp (Summary and PowerPoint presentation. Available on CD)

EU1. EuroSABOT

Martin Petersson, Tore Vernersson and Roger Lundén: Full-scale block braking of railway wheels I - Experiments performed on the Adtranz/Chalmers inertia dynamometer to investigate the roughness growth of freight car wheels, Brite/EuRam III EuroSABOT Technical Report 2H7U25T12.OB, Chalmers Solid Mechanics, Gothenburg 1997, 55 pp (availability restricted). See also VB2

Cédric Pouligny: Analysis of temperature and roughness of tread braked railway wheels, MSc Thesis EX 1998:3, Chalmers Solid Mechanics, Gothenburg 1998, 29 pp

Tore Vernersson, Martin Petersson and Martin Hiensch: Thermally induced roughness of railway wheels, Proceedings of the 12th International Wheelset Congress, Qingdao, China, September 1998, pp 68-75*. See also VB2

Tore Vernersson: EuroSABOT WP3 benchmark study using the "Chalmers model", EuroSABOT Technical Report 3H9 J29T1 OA1, Chalmers Solid Mechanics, Gothenburg 1999, 29 pp

Martin Petersson, Roger Lundén and Cédric Pouligny: Full-scale block braking of railway wheels II - testing of block prototypes on the Adtranz/Chalmers inertia dynamometer, EuroSABOT Technical Report 4H9 L21T1 OZ1, Chalmers Solid Mechanics, Gothenburg 1999, 124 pp

P H de Vos and A A van Lier: EuroSABOT final report - technical part, EuroSABOT Technical Report 6N9 O11T1 DA, NS Technical Research, Utrecht (the Netherlands) 1999, 68 pp

EU2. Silent Freight

Martin Petersson: Appendix 7 (25 pp) of Silent Freight - state-of-the-art study (G Haines, editor), Brite/EuRam III Silent Freight Technical Report 1L6 Y14T1 DB, LUL Technology Services, London 1996, 14 pp + appendices

Jens Nielsen and Markus Wallentin: Design of a perforated wheel, Brite/EuRam III Silent Freight Technical Report 3H7 O28T1 DA, Chalmers Solid Mechanics, Gothenburg 1998, 14 pp + appendices

Jens Nielsen: Acoustic short-circuiting in perforated Adtranz AD860 railway wheel - a parametric study, Brite/EuRam III Silent Freight Technical Report 3H8 M08T1 DA, Chalmers Solid Mechanics, Gothenburg 1998, 21 pp

Anders Daneryd, Jens Nielsen, Eva Lundberg and Anders Frid: On vibroacoustic and mechanical properties of a perforated railway wheel, Proceedings 6th International Workshop on Railway Noise, Île des Embiez (France) November 1998, pp 305-317

EU3. Silent Track

Tomas Fernström: Structural dynamics optimization of railway sleepers, MSc Thesis EX 1997:14, Chalmers Solid Mechanics, Gothenburg 1997, 41 pp

Jens Nielsen: Parametric study on low noise sleeper design, Brite/EuRam III Silent Track Technical Report 80801/3/CHAL/T/A1/prel-sleepdesign, Chalmers Solid Mechanics, Gothenburg 1998, 29 pp

Jens Nielsen: Structural dynamics optimisation of railway sleepers, SVIB AU2 Symposium, Riksgränsen April 1998, 10 pp

Jens Nielsen: Acoustic optimisation of railway sleepers, Proceedings 6th International Workshop on Railway Noise, Île des Embiez (France) November 1998, pp 252-263. Also in Journal of Sound and Vibration, vol 231, no 3, 2000, pp 753-764

Jens Nielsen: Rail roughness generation and growth - influence of track parameters, Silent Track Technical Report 92501/2/CHAL/T/A/RGGUPP, Chalmers Solid Mechanics, Gothenburg 1999, 22 pp

Johan Oscarsson and Jens Nielsen: Dynamic train/track interaction with state-dependent track properties, Silent Track Technical Report 92704/2/CHAL/T/Z/STATEDEP, Chalmers Solid Mechanics, Gothenburg 1999, 19 pp (part of Johan Oscarsson's licentiate thesis)

Jens Nielsen: Rail roughness generation and growth in the Netherlands - simulation vs experiments, Silent Track Technical Report 92009/2/CHAL/T/Z3/RGG-simulation Soest, Chalmers Solid Mechanics, Gothenburg 1999, 26 pp

Martin Hiensch, Jens Nielsen and Edwin Verheijen: Rail corrugation in the Netherlands - measurements and numerical simulations, Proceedings 5th International Conference on Contact Mechanics and Wear of Rail/Wheel Systems, Tokyo (Japan) July 2000, pp 81-88 (to appear in Wear)

Martin Hiensch, Jens Nielsen and Edwin Verheijen: Rail corrugation in the Netherlands – measurements and simulations, Wear, vol 253, nos 1-2, 2002, pp 140-149 (revised version of conference paper)

Jens Nielsen: Numerical prediction of rail roughness growth on tangent railway tracks, Journal of Sound and Vibration, vol 267, no 3, 2003, pp 537-548

EU4. ICON

Anders Johansson and Hans Thorberntsson: Elastoplastic material model with nonlinear kinematic hardening for rolling and sliding contact fatigue, Thesis for the Degree of Master of Science, Report EX 1997:15, Chalmers Solid Mechanics, Gothenburg, November 1997, 82 pp

Lars Broman and Andreas Larsson: Rolling contact fatigue - Residual stresses due to contact loads and cross sectional forces, Thesis for the Degree of Master of Science, Report EX 1997:16, Chalmers Solid Mechanics, Gothenburg, November 1997, 46 pp

Johansson, M, Johansson, A, Thorberntsson, H, and Josefson, B L: Models for cyclic ratchetting plasticity - integration and calibration, ASME Journal of Engineering Materials and Technology, vol 122, 2000, pp 49-55

Jonas Ringsberg: Cyclic ratchetting and failure of a pearlitic rail steel, presented at the 36th Annual Technical Meeting Society of Engineering Science, The University of Texas at Austin, Austin TX, October 1999. An extended version has been submitted for publication in Fatigue & Fracture of Engineering Materials & Structures.

Joakim Mattsson and Mattias Olsson: Rolling contact fatigue in rail heads - Three-dimensional FE simulations of stresses and strains, Chalmers Solid Mechanics, MSc Thesis EX1999:12, Göteborg, 1999, 40 pp

Ringsberg, J W, Loo-Morrey, M, Josefson, B L, Kapoor, A, and Beynon, J H: Prediction of fatigue crack initiation for rolling contact fatigue, International Journal of Fatigue, vol 22, 2000, pp 205-215

Ringsberg, J W, Bjarnehed, H, Johansson, A, and Josefson, B L: Rolling contact fatigue of rails - FE-modelling of residual stresses, strains and crack initiation, IMechE Journal of Rail and Rapid Transit, vol 214, no F 1, 2000, pp 7-19

Ringsberg, J W: Cyclic ratchetting and failure of a pearlitic rail steel, 36th Annual Technical Meeting of Society of Engineering Science, The University of Texas at Austin, Austin TX, USA, October 1999 (accepted by Fatigue & Fracture of Engineering Materials & Structures)

Ringsberg, J W, and Josefson, B L: Finite element analyses of rolling contact fatigue crack initiation in railheads (accepted by IMechE Journal of Rail and Rapid Transit)

Josefson, B L, Ringsberg, J W, Olsson, M, Näsström, M and Lindbäck, T: Rail rolling contact fatigue caused by heavy haul train transports in cold climates

EU5. EuroBALT II

Tore Dahlberg: Bibliography for EuroBALT II project on railroad ballast used as track substructure, Linköping University, IKP, Linköping 1997:

• Part 1 - Literature review of research on railroad ballast used in track sub-structure (48 references), 19 pp
• Part 2 - Bibliography for EuroBALT II project on railroad ballast used as track substructure, 91 pp
• Part 3 - Thesaurus to the Bibliography, 11 pp
  See also http://www.solid.ikp.liu.se/research/tore.htm

Tore Dahlberg: Review of research on railroad ballast used in track substructure, Proceedings VTI's and KFB's TransportForum, Linköping (Sweden) January 13-14, 1999, 17 pp

Tore Dahlberg: Further developments of the DIFF train/track interaction model for the EUROBALT II project, Report for the EUROBALT II meeting in York (UK), March 8-9, 1999, Linköping University, IKP, 15 pp

Tore Dahlberg: The Goose Hill measurements, Report for the EUROBALT II meeting in Malmö (Sweden), June 21-23, 1999, Linköping University, IKP, 12 pp

Johan Oscarsson and Per Linusson: Verification of dynamic train/track interaction models, Brite/EuRam III Project EUROBALT II, Technical Report 4C/991213/T1/DA, Chalmers Solid Mechanics, Gothenburg 1999, 16 pp

Fredrik Månsson and Tore Dahlberg: Investigation of how track parameters influence the short-term dynamics of the train/track interaction with special emphasis on factors influencing the long-term deterioration, Linköping University, IKP, Linköping (Sweden) 2000:

• Part 1 - Non-linear track model, EUROBALT Report 6C/000717/T1/OA, 30 pp
• Parts 2 and 3 - Linear track model, EUROBALT Report 6C/000405/T1/OA, 30 pp

Tore Dahlberg: Proposals for parametric study in the EuroBALT II project by use of the DIFF computer program, presented at EuroBALT II meeting at Munich EuroBALT Report 6C/991210/T1/DA, December 14-15, 1999 (revised 00-01-20)

Tore Dahlberg: Some railroad settlement models - a critical review, Report presented at EuroBALT II meeting at Munich, December 14-15, 1999. Full report in IMechE Journal of Rail and Rapid Transit (in press)

Tore Dahlberg: Review of works performed in the EUROBALT II project, Work Package 1, State-of-the-art, EUROBALT Report 6C/000817/T1/DA, 12 pp

Tore Dahlberg: Developments of the train/track interaction model DIFF for the EUROBALT II project, EUROBALT Report 6C/000707/T1/OA, 18 pp

Johan Oscarsson: Dynamic train/track interaction - variability due to track property scatter, Report F229, Chalmers Solid Mechanics, Gothenburg 2001, 20 pp

Johan Oscarsson: Latin hypercube sampling - for simulation of train/track interaction with stochastic track properties, Report F230, Chalmers Solid Mechanics, Gothenburg 2001, 25 pp

Summary reports of Chalmers contribution:

• WP1: Review of works performed in WP1 of the EUROBALT II project, State-of-the-art. EUROBALT Report 6C/000817/T1/DA, 12 pp
• WP3: Chalmers University´s contributions to WP3, September 13, 2000, 4 pp
• WP4: Developments in the EUROBALT II project of the computer program DIFF for train/track interaction simulation, EUROBALT Report 4C/000707/T/OA, 18 pp
• WP6: Chalmers University´s contributions to EUROBALT II project WP6, September 13, 2000, 7 pp

Tore Dahlberg: Some railroad settlement models – a critical review, IMechE Journal of Rail and Rapid Transit, vol 215,  no F4, 2001, pp 289-300

EU6. HIPERWHEEL

Anders Ekberg, Elena Kabo and Hans Andersson: Predicting rolling contact fatigue of railway wheels, Chalmers Solid Mechanics, Report F232, Gothenburg 2001, 7 pp. Presented at 13th International Wheelset Congress in Rome, September 17-21, 1996

Mauro Cavalletti, Anders Ekberg, Alan Facchinetti, Giampaolo Mancini and Maurizio Stanca: Prediction of rail vehicle mission loads and RCF damage by multibody modelling, Proceedings  1st MSC.ADAMS European User Conference, London (UK) November 2002, 12 pp on CD

Anders Ekberg, Elena Kabo and Hans Andersson: An engineering model for prediction of rolling contact fatigue of railway wheels (see under project MU9) Anders Ekberg: Predicting fretting fatigue of railway wheel/ axle assemblies – a state-of-the-art survey, Chalmers Applied Mechanics, Gothenburg 2003 (in progress)

Anders Ekberg: Numerical prediction of fretting of railway axles, Proceedings International Seminar on Railway Axles at Imperial College, London (UK) September 2003, 37 pp on CD

Jens Nielsen and Claes Fredö: Multi-disciplinary optimization of railway wheels, 8th International Workshop on Railway Noise (IWRN8), Buxton UK, 8-11 September 2004 (accepted for presentation)

Anders Ekberg: Predicting fretting fatigue of railway wheel-axle assemblies - a state-of-the-art survey, Research Report 2004:10, Chalmers Applied Mechanics, Gothenburg 2004, 38 pp

Anders Ekberg: Fretting fatigue of railway axles – review of predictive methods and outline of a finite element model, IMechE Journal of Rail and Rapid Transit, vol 218, pp 299–316, 2004

Jens Nielsen and Claes Fredö: Multi-disciplinary optimization of railway wheels, Proceedings 8th International Workshop on Railway Noise (IWRN8), Buxton, Derbyshire, UK, September 2004, pp 35-46 (submitted to Journal of Sound and Vibration). This paper was announced in the previous semi-annual report

Roger Lewis, Rob S Dwyer-Joyce, Stefano Bruni, Anders Ekberg, Mauro Cavalletti, Kamel Bel Knani: A new CAE procedure for railway wheel tribological design, Proceedings 14th International Wheelset Congress, Orlando FL, USA, October 2004, 14 pp on CD

Roger Lewis, Stefano Bruni, Anders Ekberg and Rob S Dwyer-Joyce: A design tool for railway wheels incorporating damage models and dynamic simulations, Proceedings 2005 Joint Rail Conference, Pueblo CO (USA) 16–18 March 2005, 9 pp on CD

EU7. INFRASTAR

Internal reports (restricted availability):

• Dynamic train-track interaction model of RATP metro
• INFRASTAR test specification
• Contact load data from curving of a standard Malmbanan bogie

Martin Hiensch, Ajay Kapoor, Lennart Josefson, Jonas Ringsberg, Jens Nielsen and Francis Franklin: Two-material rail development to prevent rolling contact fatigue and to reduce noise levels in curved rail track, Proceedings 5th World Congress on Railway Research (WCRR 2001), Cologne (Germany) November 2001, 16 pp on CD. At the congress this work was awarded the prize for best paper in its category

Ajay Kapoor, Jonas Ringsberg, Lennart Josefson and Francis Franklin: Shakedown limits in three-dimensional wheel-rail rolling-sliding contacts, Proceedings 8th International Fatigue Congress FATIGUE ’2002, Stockholm (Sweden) June 2002,  vol 2, pp 1365-1372

Martin Hiensch, Francis Franklin, Jens Nielsen, Jonas Ringsberg, Geert-Jaap Weeda, Ajay Kapoor and Lennart Josefson: Prevention of RCF damage in curved track through development of the INFRA-STAR two-material rail, Fatigue & Fracture of Engineering Materials & Structures, vol 26, no 10, 2003,  pp 1007-1017

Martin Hiensch, Per-Olof Larsson, Olof Nilsson, Didier Levy, Ajay Kapoor, Francis Franklin, Jens Nielsen, Jonas Ringsberg and Lennart Josefson: Two-material rail development: field test results regarding rolling contact fatigue and squeal noise behaviour, Proceedings 6th International Conference on Contact Mechanics and Wear of Rail/Wheel Systems (CM2003), Gothenburg June 2003, vol I, pp 39-47

Martin Hiensch: Two-material rail combats rolling contact fatigue, Railway Gazette International, September 2003,  pp 587-590

Martin Hiensch, Per-Olof Larsson, Olof Nilsson, Didier Levy, Ajay Kapoor, Francis Franklin, Jens Nielsen, Jonas Ringsberg and Lennart Josefson: Development of a two-material rail  for RCFand noise control, Proceedings 6th World Congress  on Railway Research (WCRR 2003), Edinburgh (UK) October 2003, 12 pp

Jonas Ringsberg, Anders Skyttebol and Lennart Josefson: Investigation of the rolling contact fatigue resistance of laser-cladded twin-disc specimens: FE simulation of laser cladding, grinding and a twin-disc test, submitted for publication in International Journal of Fatigue

Jonas Ringsberg, Francis Franklin, Lennart Josefson, Ajay Kapoor and Jens Nielsen: Fatigue design of surface coated railway rails using shakedown theory, finite element calculations, and lab and field trials, submitted for publication in International Journal of Fatigue 

EU8. ERS

Jan Henrik Sällström, Martin Helgen, Tore Vernersson and Roger Lundén: ERS state-of-the-art report, Version 3,  Chalmers Applied Mechanics, Gothenburg September 2003,  43 pp + Appendix 71 pp

Jan Henrik Sällström, Martin Helgen, Tore Vernersson and Roger Lundén: WP2 Thermo-mechanical modelling report, Preliminary version A, EU Project ERS, Chalmers Applied Mechanics, Gothenburg December 2004, 38 pp + appendices

Jan Henrik Sällström, Martin Helgen, Tore Vernersson and Roger Lundén: Task 2.2 Thermomechanical modelling and Task 2.5 Wheel thermomechanical calculation, Preliminary version B, EU Project ERS, Chalmers Applied Mechanics, Gothenburg August 2005

Jan Henrik Sällström, Martin Helgen, Tore Vernersson and Roger Lundén: Task 2.2 Thermomechanical modelling and Task 2.5 Wheel thermomechanical calculation, Preliminary version C, EU Project ERS, Chalmers Applied Mechanics, Gothenburg November 2005 (preliminary version B of this report was listed in the previous semi-annual report), 66 pp + Appendices 166 pp

EU9. EURNEX

EURNEX: Position paper on railway infrastructure and signalling, Version 1 of 13 March 2006, Chalmers Applied Mechanics, Gothenburg 2006, 46 pp

EURNEX: Position paper on railway infrastructure and signalling, Version 2 of 22 July 2006, Chalmers Applied Mechanics, Gothenburg 2006, 50 pp

EU10. INNOTRACK

Björn Paulsson, Martin Platzer and Anders Ekberg: INNOTRACK – Innovative Track System — a unique approach from infrastructure managers and competitive track supply industry to develop the innovative products of the future, Poster at 7th World Congress on Railway Research, Montreal (Canada) June 2006, 12 pp 

Roger Lundén and Peter Pointner: EU project INNOTRACK – Innovative Track Systems, Plenary Lecture at 7th International Conference on Contact Mechanics and Wear of Rail/Wheel Systems, Brisbane (Australia) September 2006

Björn Paulsson: INNOTRACK – Innovative Track System – A unique approach of infrastructure managers and competitive track supply industry for developing the innovative products of the future (Keynote Speech), Proceedings International Heavy Haul Association Specialist Technical Session (IHHA2007), Kiruna (Sweden) 11-13 June 2007, pp 5-15 

Elias Kassa and Jens Nielsen: Dynamic interaction between train and railway turnout – full-scale field tests and validation of simulation models, oral presentation at the 20th IAVSD Symposium in Berkeley CA (USA) 13-17 August 2007 (accepted for publication in Vehicle System Dynamics. Also listed under project TS7)

Jens Nielsen: Rail roughness level assessment based on high-frequency wheel/rail contact force measurements, Proceedings 9th International Workshop on Railway Noise (IWRN9), Munich (Germany) 4–8 September 2007, 6 pp (also listed under project SP11) 

Ulla Espling and Anders Ekberg: INNOTRACK – INNOvative TRACK systems, 15th Nordic Seminar on Railway Technology, Hook (Sweden) May 2008, 1+39 pp (Summary and PowerPoint presentation. Available on CD) 

Johan Sandström and Anders Ekberg: A numerical study of the mechanical deterioration of insulated rail joints (Submitted for international publication. Also listed under project MU18)

SP1. Lucchini Sweden AB (bilateral agreement)

Roger Lundén, Jürgen Schneider and Tore Vernersson: New wheelsets for 25 and 30 tonne axle loads, Presented at 6. Internationale Schienenfahrzeugtagung, Dresden (Germany) October 2003, 6 pp

SP2. Noise from Swedish railways

SP3. Track force measurements on X2

SP4. VAE AG gmbh (bilateral agreement)

SP5. voestalpine Schienen gmbh (bilateral agreement)

SP6.  Development of a quiet rail

SP7.  Lateral track stability

Erland Johnson: Att förebygga solkurvor – mätning av axialkrafter i järnvägsräls (To provide against sun-kinks - measurement of axial forces in rails, in Swedish), Working Report 2004:11, SP Building Technology and Mechanics, Borås 2004, 11 pp

Erland Johnson: Measurement of forces and neutral temperatures in railway rails - an introductory study, Report 2004:11, SP Building Technology and Mechanics, Borås 2004, 69 pp

Elena Kabo, Anders Ekberg and Lars Jacobsson: Railway track stability – a state-of-the-art survey, Research Report 2004:2, Chalmers Applied Mechanics, Gothenburg 2004, 94 pp

Elena Kabo, Anders Ekberg and Lars Jacobsson: Spårstabilitet − en introduktion för bantekniker (Track stability − an introduction for track technicians, in Swedish), Research Report 2004:3, Chalmers Applied Mechanics, Gothenburg 2004, 20 pp

Erland Johnson: Vibrationsmetoder för mätning av axialkraft i järnvägsräl (Vibrational methods for measuring axial rail force, in Swedish), SP Technical Note 2005:8, Building Technology and Mechanics, SP Swedish National and Testing and Research Institute, Borås 2005, 20 pp

Erland Johnson: Vibrational methods for measuring axial rail force, SP Technical Note 2005:11, Building Technology and Mechanics, SP Swedish National and Testing and Research Institute, Borås 2005, 47 pp

Lars Jacobsson: A plasticity model for ballast resistance, SP Report 2005:27, Building Technology and Mechanics, SP Swedish National and Testing and Research Institute, Borås 2005, 35 pp

Lars Jacobsson: User element for ABAQUS designed to represent ballast resistance, SP Technical Note 2005:12, Building Technology and Mechanics, SP Swedish National and Testing and Research Institute, Borås 2005, 12 pp

Erland Johnson: The mathematics behind a guided wave technique for rail force determination, SP Technical Note 2005:10, Building Technology and Mechanics, SP Swedish National and Testing and Research Institute, Borås 2005, 24 pp

Elena Kabo: Ballastgeometrins inverkan på spårets sidomotstånd: en parameterstudie (Influence of ballast geometry on the lateral resistance of the track: a parametric study, in Swedish), Research Report 2005:09, Chalmers Applied Mechanics, Gothenburg 2005, 29 pp

Henrik Snygg: Resonansstudie av spårsystem – räl, pads, slipers och ballast (Resonance study of track systems – rail, pads, sleepers and ballast, in Swedish), SP Technical Note 2006:10, Building Technology and Mechanics, SP Swedish National and Testing and Research Institute, Borås 2006, 34 pp

Elena Kabo: A numerical study of the lateral ballast resistance in railway tracks, IMechE Journal of Rail and Rapid Transit (accepted for publication) 

Gunnar Kjell: An investigation of the uncertainties in the estimated load levels when using the guided wave technique, SP Technical Note 2006:17, Building Technology and Mechanics, SP Swedish National Testing and Research Institute, Borås 2006, 22 pp

Gunnar Kjell: Using the guided wave technique for determination of an axial rail force, SP Technical Note 2006:18, ibidem, Borås 2006, 30 pp

Gunnar Kjell: Resonance frequency measurement in an axially loaded rail, SP Technical Note 2006:19, ibidem, Borås 2006, 21 pp

Gunnar Kjell: Measurement of axial rail force - experimental set-up for a full scale laboratory experiment, SP Technical Note 2006:20, ibidem, Borås 2006, 20 pp

Erland Johnson and Gunnar Kjell: Resonance frequency modelling and measurement in a railway system including rail, pads, sleepers and ballast, SP Technical Note 2006:21, ibidem, Borås 2006, 13 pp

Robert Lillbacka: A finite element program for solving dispersion relation in long beams with arbitrary cross section, SP Technical Note 2006:27, ibidem, Borås 2006, 10 pp

Elena Kabo and Anders Ekberg: Numerisk prediktering av uppkomst av solkurvor – modellering, analys, inledande parameterstudie samt indatagenerering (Numerical prediction of the formation of sun-kinks – modelling, analysis, preliminary parametric study and input data generation; in Swedish), Research Report 2007:02, Chalmers Applied Mechanics, Gothenburg 2007, 16 pp

Anders Ekberg and Elena Kabo: PRESOL – pre-processor för solkurveanalys (PRESOL – a pre-processor for sun-kink analysis; in Swedish), Research Report 2007:03, Chalmers Applied Mechanics, Gothenburg 2007, 11 pp

Erland Johnson, Gunnar Kjell, Lars Jacobsson, Robert Lillbacka, Anders Ekberg and Elena Kabo: Lateral spårstabilitet – slutrapport (Lateral track stability – final report; in Swedish), Research Report 2007:04, Chalmers Applied Mechanics, Gothenburg 2007, 31 pp

SP8. Design of insulated joints

Jens Nielsen, Modellering av isolerskarv i DIFF, Department of Applied Mechanics, Research report 2004:13, Chalmers University of Technology, Göteborg, Sweden, 7 pp, 2004 (in Swedish)

Elena Kabo, Förstudie. Isolerskarvars inverkan på spårets mekaniska egenskaper: en finit elementanalys, Department of Applied Mechanics, Research report 2004:14, Chalmers University of Technology, Göteborg, Sweden, 12 pp, 2004 (in Swedish)

Elena Kabo, Jens Nielsen & Anders Ekberg, Prediction of dynamic train--track interaction and subsequent material deterioration, 19th IAVSD symposium, Milano, Italy, 29 August -- 2 September, 3pp, 2005

Elena Kabo, Jens Nielsen & Anders Ekberg, Prediction of dynamic train--track interaction and subsequent material deterioration in the presence of insulated rail joints, 10 pp, 2005, submitted for International Publication

SP9. Sleeper design for 30 tonnes axle load

SP10. Noise reduction measures and EU project QCITY

Nicolas Renard, Jens Nielsen, Henrik Malker and Henrik Samuelsson: Definition of a reference system for freight trains to compare against in quantification analyses – the Tjörnarp site for railway noise studies, Technical Report, QCITY, EU Sixth Framework Programme, Contract no TIP4-CT-2005-516420, 19 pp and 10 appendices

Simon Gripner: Studie av samband mellan RoV-nivåer och kurvatur (Studies of relationship between RoV levels and curvature; in Swedish), Report, Banverket BBS, Borlänge (Sweden) July 2006, 7 pages + 12 appendices. RoV = Räfflor och Vågor (Grooves/corrugations and Waves)

Simon Gripner: Analys av STRIX:s RoV-mätningars hastighetsberoende (Analysis of speed dependence of RoV measurements by STRIX; in Swedish), Report, Banverket BBS, Borlänge (Sweden) August 2006, 4 pages + 3 appendices

Jens Nielsen: Banverkets FUD-projekt med fokus på rullkontaktbuller – status januari 2007 och förslag på fortsättning (Banverket research projects on rolling noise – status January 2007 and suggestions for continued research; in Swedish), Research Report 2007:06, Chalmers Applied Mechanics, Gothenburg 2007, 17 pp

Jan Spännar: Tersbandsdiagram för räfflor och vågor – tolknings- och värderingsstöd (Roughness level spectra in 1/3 octave bands – a handbook for interpretation and assessment of measurement results; in Swedish), Banverket, Report BVH 1588, Borlänge 2007, 28 pp (preliminary version)

Jan Spännar: A new approach of assessing rail roughness, Proceedings 4th International Conference on Railway Condition Monitoring, Derby (UK) June 2008, 5 pp (available on CD)

SP11. Vertical contact forces of high-speed trains

Anders Johansson: Rail roughness measurements, rail grinding strategies and numerical simulations of rail roughness growth – a literature survey, preliminary version March 2006, Chalmers Applied Mechanics, Gothenburg 2006, 20 pp 

Per Gullers, Lars Andersson and Roger Lundén: High-frequency vertical wheel–rail contact forces – field measurements and influence of track irregularities, Proceedings 7th International Conference on Contact Mechanics and Wear of Rail/Wheel Systems (CM2006), Brisbane (Australia) September 2006, vol 1, pp 137‑143 (submitted for possible publication in Wear)

Jens Nielsen: High-frequency vertical wheel–rail contact forces – validation of a prediction model by field testing, Proceedings 7th International Conference on Contact Mechanics and Wear of Rail/Wheel Systems (CM2006), Brisbane (Australia) September 2006, vol 1, pp 41-48 (submitted for publication in Wear. Also listed under project TS8)

Jens Nielsen: Rail roughness level assessment based on high-frequency wheel–rail contact force measurements, to be presented at 9th International Workshop on Railway Noise (IWRN9), Feldafing/Munich (Germany) 4-8 September 2007

Anders Ekberg, Elena Kabo, Jens Nielsen and Roger Lundén: Subsurface initiated rolling contact fatigue of railway wheels as generated by rail corrugation, International Journal of Solids and Structures (accepted for publication. Also listed under project MU10)

Anders Ekberg and Elena Kabo: Realtidsanalys av utmattningspåkänning från uppmätta spårkrafter, Chalmers Tillämpad mekanik, Forskningsrapport 2007:11, Göteborg 2007, 7+1 pp (summary in Swedish of the two reports below)

Anders Ekberg and Elena Kabo: The influence of vertical load transients on wheel and rail deterioration, Chalmers Applied Mechanics, Research Report 2007:12, Gothenburg 2007, 20 pp

Elena Kabo and Anders Ekberg: Index for real-time prediction of sub-surface initiated rolling contact fatigue in railway wheels, Chalmers Applied Mechanics, Research Report 2007:13, Gothenburg 2007, 12 pp

Jens Nielsen: Rail roughness level assessment based on high-frequency wheel-rail contact force measurements, Proceedings 9th International Workshop on Railway Noise (IWRN9), Munich (Germany) 4-8 September 2007, 6 pp (also listed under project EU10)

Jens Nielsen: Rail roughness level assessment based on high-frequency wheel-rail contact force measurements, Notes on Numerical Fluid Mechanics and Multidisciplinary Design, vol 99 (Noise and Vibration Mitigation for Rail Transportation Systems), Springer, Berlin 2008, pp 355-362 (announced in previous semi-annual reports) 

Jens Nielsen: High-frequence vertical wheel-rail contact forces – validation of a prediction model by field testing, Wear, vol 265, nos 9-10, pp 1465-1471 (announced in previous semi-annual reports)

Per Gullers, Lars Andersson and Roger Lundén: High-frequency vertical wheel-rail contact forces – field measurements and influence of track irregularities, Wear, vol 265, nos 9-10, pp 1472-1478

SP12. New sleeper specifications

Rikard Bolmsvik and Jens Nielsen: Dimensionerande böjmoment i sliprar vid 35 tons axellast (Dimensioning bending moments in sleepers for axle load 35 tonnes; in Swedish), Research Report 2006:9, Chalmers Applied Mechanics, Gothenburg 2006, 44 pp

SP13. Alarm limits for wheel damage

Jens Nielsen, Anders Ekberg and Elena Kabo: Larmgräns för hjulskadedetektorer – en utredning av risk för rälbrott på Malmbanan (Alarm limit for wheel damage detectors – an investigation of risks of rail fracture on the Iron Ore Line; in Swedish), Research Report 2007:05, Chalmers Applied Mechanics, Gothenburg 2007, 39 pp

Jens Nielsen, Elena Kabo and Anders Ekberg: Alarm limits for wheel flats, 15th Nordic Seminar on Railway Technology, Hook (Sweden) May 2008, 1+27 pp (Summary and PowerPoint presentation. Available on CD)

SP14. Particle emissions and noise from railways

SP15. Computer program for design of block brakes

Tore Vernersson: Tread braking of railway wheels – dimensioning wheel temperatures, Chalmers Applied Mechanics / Division of Dynamics (preliminary version June 2008), 45 pp

Support research

Bengt Åkesson, Hans Bjarnehed, Hans Andersson and Lennart Josefson: Routine FE determination of stress intensity factors at curved crack fronts using a Müller-Breslau influence function technique. Presented at IUTAM Symposium on Innovative Computational Methods for Fracture and Damage, University College Dublin, June 30- July 5, 1996, 25 pp. Published in Computational Mechanics, vol 19, 1997, pp 481-489.

Mikael Enelund, Lennart Mähler, Kenneth Runesson and Lennart Josefson: Unified formulation and integration of the standard viscoelastic solid with integer and fractional order rate laws, Chalmers Solid Mechanics, Report F192, Gothenburg 1996, 26 pp. Presented at 19th International Congress of Theoretical and Applied Mechanics (ICTAM) in Kyoto, August 25-31, 1996 (accepted for publication in International Journal of Solids and Structures)

Surveys and popular reports and articles

Bengt Åkesson, Tore Dahlberg and Roger Lundén: Railway mechanics research 1987-1995 at Chalmers University in Gothenburg - dynamic train/track interaction and railway wheelsets, Chalmers Solid Mechanics, Report F185, Gothenburg 1996, 42 pp

Tore Dahlberg: Järnvägsforskning vid Chalmers hållfasthetslära (in Swedish), Modern Järnväg, no 3, 1995, pp 10-11

Tore Dahlberg: Chalmers Railway Mechanics - CHARMEC, The Cairn Tribune (Chalmers Alumni International Resources Network), Chalmers, no 3, 1996, pp 15-16

Bengt Åkesson: NUTEKs kompetenscentrum Chalmers Järnvägsmekanik - nuläge och tioårsperspektiv (in Swedish), VTIs och KFBs Forskardagar, Linköping, January 10-11, 1996, 1 p (abstract only)

Bengt Åkesson: Tågen på spåren - om järnvägens mekanik (The trains on the track - on the mechanics of railways, in Swedish), The William Chalmers Lecture of 5 November 1996, Chalmers University of Technology, 1997, 27 pp

Bengt Åkesson: Chalmers järnvägsmekanik - CHARMEC, SVIBNytt (Skandinaviska Vibrationsföreningen), december 1997/januari 1988, sid 20-25

Bengt Åkesson: Chalmers järnvägsmekanik - CHARMEC (Chalmers railway mechanics - CHARMEC, in Swedish), SVIB VibrationsNytt (Scandinavian Vibration Society), vol 15/16, no 4/1, December/January 1997/98, pp 20-25

Bengt Åkesson and Roger Lundén: CHARMEC Biennial Report 1 July 1995 - 30 June 1997, Chalmers Solid Mechanics, Gothenburg January 1998, 28 pp

Roger Lundén and Bengt Åkesson (editors): Sammanfattningar av föredrag vid Seminariet i Järnvägsmekanik i Göteborg 12-13 mars 1998 (Summaries of papers read at the Seminar in Railway Mechanics in Gothenburg 12-13 March 1998, in Swedish and English), Chalmers Solid Mechanics, Gothenburg March 1998, 43 pp

Bengt Åkesson: Eisenbahnforschung im Kompetenzzentrum CHARMEC an der TH Chalmers, Railway Seminar Deutsche Bahn/Inexa Profil, Berlin (Germany) June 1999, 5 pp

Roger Lundén: CHARMEC Intermediate Report 1 July 1997 - 30 September 1999, Chalmers Solid Mechanics, Gothenburg September 1999, 12 pp (for the fair "Nordic Rail 99" in Jönköping 5-7 October 1999)

Roger Lundén: Kompetenscentret CHARMEC (The Competence Centre CHARMEC, in Swedish), Modern Järnväg, no 2, 2000, pp 12-13

Bengt Åkesson and Roger Lundén: CHARMEC Triennial Report 1 July 1997 - 30 June 2000, Chalmers University of Technology, Gothenburg March 2001, 58 pp

Anders Ekberg, Elena Kabo, Jens Nielsen and Jonas Ringsberg: Researchers on the track of wheel-rail interaction, Railway Gazette International, June 2003, pp 397-399

Bengt Åkesson and Roger Lundén: CHARMEC Triennial Report 1 July 2000 - 30 June 2003, Chalmers University of Technology, Gothenburg March 2004, 82 pp

Anders Ekberg, CHARMEC – Ett kompetenscentrum inom järnvägsmekanik, Tekniska Magasinet (web-based journal of the Technical Association), www.tekniskasamfundet.org/magasinet/mag03-05/mag03-05_htm/mag03-05_charmec.htm, December 2003 (in Swedish)

Miscellaneous

Roger Lundén: LKAB invests in 30 tonne axleloads, Railway Gazette International, vol 154, no 9, 1998, pp 585-588 (3 pages). Extended reprints available

Björn Paulsson: Assessing the track costs of 30 tonne axleloads, Railway Gazette International, vol 154, no 11, pp 785-788 (3 pages). Extended reprints available

Jens Nielsen and Annika Stensson: Enhancing freight railways for 30 tonne axleloads, IMechE: Journal of Rail and Rapid Transit (in printing November 1999)

Roger Lundén and Bernt Andersson: Heavier and longer electric trains with higher axle loads - an example from the "Iron Ore Line" in the north of Sweden (in English and Russian), Swedish/Russian Seminar at Petersburg State Transport University, St Petersburg (Russia) May 2000, 37 pp

Anders Ekberg, Elena Kabo and Jonas Ringsberg (editors): Proceedings 6th International Conference on Contact Mechanics and Wear of Rail/Wheel Systems (CM2003), vols I&II  (ISBN91-631-3928-6 & 91-631-3929-4)+Appendices I,II&III, 572+19+24+14 pp

Roger Lundén, Thomas Nordmark and Björn Paulsson: Enhancing iron ore transportation in Sweden, Proceedings 7th International Heavy Haul Conference, Brisbane (Australia)  June 2001, pp 91-106

Robert Fröhling, Tord Karlsson and Roger Lundén: New  LKABiron ore wagons with self-steering bogies and rapid unloading system, ibidem, pp 161-166

Roger Lundén, Johan Marais and Stefan Schrader: Developing wheelsets for 30 tonne axle loads, Railway Gazette International, September 2001, pp 631-634

Anders Ekberg: Surface cracks in rolling contact – a brief  review with focus on railway wheels, Chalmers Applied Mechanics, Gothenburg 2002, 14 pp

Roger Lundén (Guest Editor): Special Issue Fatigue &  Fracture of Engineering Materials & Structures, vol 26,  no 10, 2003, pp 861-1031

Railway Engineering Research at the Division of Solid Mechanichs, Chalmers 1988-1995

Extract from Report F185 , (pdf-file 111 kB) Division of Solid Mechanics, Chalmers

Wheels, Axles and Brakes - published papers and reports 1988-1995

Research

1. R Lundén: Järnvägshjul med krympförband - beräkningar och experiment för verifiering av toleranser (Railway wheels with shrink-fit assembly - calculations and experiments, in Swedish). A joint project with ABB Sura Traction AB. Report F110, Division of Solid Mechanics, Chalmers University of Technology, Göteborg, Sweden, 39 pp, 1988.
2. R Lundén: Tread braked wheels of railway freight cars. On admissible combinations of axle loads, train speeds and signalling distances for solid wheel SJ 57H. A joint project with ABB Sura Traction AB. Report F112, Division of Solid Mechanics, Chalmers University of Technology, Göteborg, Sweden, 37 pp, 1989. Condensed version published in Proceedings of the Institution of Mechanical Engineers, Journal of Rail and Rapid Transit, vol 205 (Part F), pp 21-33, 1991.
3. M Fermér and R Lundén: Transient brake temperatures found by use of analytical solutions for finite hollow cylinders. A joint project with ABB Sura Traction AB. Report F134, Division of Solid Mechanics, Chalmers University of Technology, Göteborg, Sweden, 29 pp, 1990. Also in Proceedings of the Institution of Mechanical Engineers, Journal of Mechanical Engineering Science, vol 205 (Part C), pp 189-200, 1991.
4. R Lundén: Contact region fatigue of railway wheels under combined mechanical rolling pressure and thermal brake loading. A joint project with ABB Sura Traction AB. Report F135, Division of Solid Mechanics, Chalmers University of Technology, Göteborg, Sweden, 18 pp, 1990. Also in Wear, Vol 144, No 1-2, pp 57-70, 1991 (this issue of Wear constitutes Proceedings of 3rd International Conference on Contact Mechanics and Wear of Rail/Wheel Systems, Cambridge, UK, July 1990).
5. M Fermér: Brake discs for passenger trains - a theoretical and experimental comparison of temperatures and stresses in solid and ventilated discs. A joint project with ABB Sura Traction AB. Report F139, Division of Solid Mechanics, Chalmers University of Technology, Göteborg, Sweden, 16 pp, 1991. Also in Proceedings of the Institution of Mechanical Engineers, Journal of Rail and Rapid Transit, vol 206 (Part F), pp 37-46, 1992.
6. M Fermér: User's manual for AXITEMP - a computer program for calculating transient axisymmetric temperature distributions in finite hollow cylinders. A joint project with ABB Sura Traction AB. Report F141, Division of Solid Mechanics, Chalmers University of Technology, Göteborg, Sweden, 17 pp, 1991.
7. M Fermér: Flexible wheels for railway freight cars considering thermal and mechanical aspects of block braking. Proceedings Tenth International Wheelset Congress, Sydney, Australia, pp 277-281, 1992.
8. R Lundén: Cracks in railway wheels under rolling contact load. Proceedings Tenth International Wheelset Congress, Sydney, Australia, pp 163-167, 1992.
9. J Jergéus and R Lundén: Thermally damaged railway wheels detected through a later measuring of residual deformations. A joint project with ABB Sura Traction AB. Report F146, Division of Solid Mechanics, Chalmers University of Technology, Göteborg, Sweden, 32 pp, 1992.
10. T Dahlberg, R Lundén and B Åkesson: Report of railway engineering research at Chalmers University in Göteborg. Proceedings of the Institution of Mechanical Engineers, Journal of Rail and Rapid Transit, vol 206 (Part F), pp 145-148, 1993.
11. M Fermér: Optimization of a railway freight car wheel by use of a fractional factorial design method. A joint project with ABB Sura Traction AB. Report F170, Division of Solid Mechanics, Chalmers University of Technology, Göteborg, Sweden, 17 pp, 1993. Also in Proceedings of the Institution of Mechanical Engineers, Journal of Rail and Rapid Transit, vol 208 (Part F), pp 97-107, 1994.
12. M Fermér and J C O Nielsen: Wheel/rail contact forces for flexible versus solid wheels due to tread irregularities. Proceedings 13th IAVSD Symposium on Dynamics of Vehicles on Roads and on Tracks, Chengdu, Sichuan, China, pp 142-157, 1993.
13. M Fermér: Railway wheelsets - Theory, experiments and design considering temperatures, stresses and deformations as induced by braking loads and contact forces. PhD Dissertation, Division of Solid Mechanics, Chalmers University of Technology, Göteborg, Sweden, 78 pp, 1993.
14. M Fermér and J C O Nielsen: Vertical train/track interaction with soft and stiff railpads - theory and full-scale experiments. Proceedings of the Institution of Mechanical Engineers, Journal of Rail and Rapid Transit, vol 209 (Part F), pp 39-47, 1995.
15. S Hammarlund, Å Jahlenius, T Dahlberg: Goose Hill measuresments confirms X2000's low dynamic track forces. Railway Gazette International, vol 150(7), pp 439-444, 1994.
16. J Jergéus: Wheel flats and martensite formation in railway wheel treads - a literature survey. Report F156, Chalmers University of Technology, Division of Solid Mechanics, Göteborg, Sweden, 1992, 19 pp.
17. J Jergéus. Martensite formation in railway wheel flats. Licentiate thesis No 1994:4, Chalmers University of Technology, Division of Solid Mechanics, Göteborg, Sweden, 1994, 48 pp.
18. J Jergéus, R Lundén and P Gullers. Martensite formation around railway wheel flats. Proceedings of the 11th International Wheelset Congress, Paris, France, June 1995, pp. 53-58.
19. J Jergéus. Martensite formation and residual stresses around railway wheel flats. In preparation (Oct 95). To be submitted for international publication.
20. A Ekberg, H Bjarnehed and R Lundén: A fatigue life model for general rolling contact with application to wheel/rail damage. A joint project with ABB Sura Traction AB and the Mechanical Systems Division of ABB Traction AB. Fatigue and Fracture of Engineering Materials & Structures, vol 18(10), pp 1189-1199, 1995.
21. A Ekberg, H Bjarnehed: Rolling contact fatigue of wheel/rail systems - a literature survey. A joint project with ABB Sura Traction AB and the Mechanical Systems Division of ABB Traction AB. Report F182, Division of Solid Mechanics, Chalmers University of Technology, Göteborg, Sweden, 50 pp, 1995 (in printing nov. 1995).
22. T Vernersson and R Lundén: Stresses in Rc-locomotive tyres - On the influence of shrink-fit and braking stresses on rolling contact fatigue. A joint project with ABB Sura Traction AB. Report F183, Division of Solid Mechanics, Chalmers University of Technology, Göteborg, Sweden, ?? pp, 1995. In preparation (Oct 95).

Student reports

1. A Ahlm, P Fejde, K Grundberg and R Langer: Axlar, lager och lagerboxar till järnvägsfordon (Axles, bearings and axleboxes for railway vehicles, in Swedish). A joint project with ABB Sura Traction AB. Student Report T112, Division of Solid Mechanics, Chalmers University of Technology, Göteborg, Sweden, 58 pp, 1988.
2. J Bergström and L Granlund: Brake discs for rail vehicles. A joint project with ABB Sura Traction AB. Student Report T113, Division of Solid Mechanics, Chalmers University of Technology, Göteborg, Sweden, 54 pp, 1988.
3. F Berghel, E Grundberg, J Jergéus and Ö Johansson: Optimal utformning av skiva hos järnvägshjul (Optimal design of disc of railway wheel, in Swedish). A joint project with ABB Sura Traction AB. Student Report T120, Division of Solid Mechanics, Chalmers University of Technology, Göteborg, Sweden, 43 pp, 1990.
4. J Jergéus: Wheel/rail contact problems modelled with three-dimensional finite elements in a supercomputer. A joint project with ABB Sura Traction AB. Student Report T125, Division of Solid Mechanics, Chalmers University of Technology, Göteborg, Sweden, 40 pp, 1991.
5. K Andersson, K Johnsson, H Simonsen and E Wang: Martensite formation in railway wheel treads. A joint project with ABB Sura Traction AB. Student Report T126, Division of Solid Mechanics, Chalmers University of Technology, Göteborg, Sweden, 40 pp, 1991.
6. S Berglund, R Karlsson, P-A Olsson and C Stubner: Formation of wheel flats and martensite in railway wheel treads. A joint project with ABB Sura Traction AB. Student Report T131, Division of Solid Mechanics, Chalmers University of Technology, Göteborg, Sweden, 48 pp, 1992.
7. L Mähler: Fracture of railway wheels exposed to high braking temperatures. A joint project with the Swedish State Railroad Company (SJ) and ABB Sura Traction AB. Student Report T132, Division of Solid Mechanics, Chalmers University of Technology, Göteborg, Sweden, 35 pp, 1992.
8. J Ahldén, K Mehtola A Normén and S Sjödin: Hydrogen embrittlement of railway wheels. A joint project with ABB Sura Traction AB. Student Report T134, Division of Solid Mechanics, Chalmers University of Technology, Göteborg, Sweden, 48 pp, 1994.
9. O Cato, T Göransson, P Johansson and A Lindberg: Acoustically short-circuited railway wheels - a preliminary experimental study. A joint project with ABB Sura Traction AB. Student Report T135, Division of Solid Mechanics, Chalmers University of Technology, Göteborg, Sweden, 39 pp, 1995.
10. O Kämmerling: Vibrational modes of railway wheels. Student Report T137, Division of Solid Mechanics, Chalmers University of Technology, Göteborg, Sweden, 32 pp, 1995.

Train/track interaction - published papers and reports

Research papers with Abstracts

1. T Dahlberg: Dynamic interaction between train and track - A literature survey (with 133 references). Report F120, Division of Solid Mechanics, Chalmers University of Technology, Gothenburg, Sweden, 21 pp, 1989
2. T Dahlberg: Vehicle-Bridge Interaction - Part 1. Report F90, Division of Solid Mechanics, Chalmers University of Technology, Gothenburg, Sweden, 17 pp, 1984
3. T Dahlberg: Vehicle-Bridge Interaction - Part 2. Report F92, Division of Solid Mechanics, Chalmers University of Technology, Gothenburg, Sweden, 29 pp, 1984
4. T Dahlberg: Vehicle-Bridge Interaction. Vehicle System Dynamics, Vol 13, No 4, pp 187-206, 1984
   SUMMARY: of references 2, 3, and 4: With the emergence of high-speed trains, dynamic loads on bridges have changed. A method for estimation of the time-dependent vehicle-bridge interaction forces has been developed. The increase (or decrease) of the bridge response due to dynamic effects was determined. The moving constant-force problem was reviewed in some detail. Results obtained by the present method for the moving-mass problem were compared with existing experimental and theoretical results as reported in the literature. A parametric study of bridge responses was made. The parameters varied were the vehicle speed, the ratio of vehicle mass to bridge mass, the ratio of vehicle eigenfrequency to bridge eigenfrequency, and the relative damping of the vehicle. Finally, the influence of an initial bridge deflection was discussed.
5. T Dahlberg: Structural responses to moving forces determined by reciprocity relations. Vehicle System Dynamics, Vol 19, No 3, pp 113-130, 1990
   SUMMARY: Reciprocity relations are valid also for dynamic problems. In this paper, the reciprocity relation was first used to determine the response of a simply supported beam subjected to an arbitrarily time-varying force moving with constant speed. Then the reciprocity relation was used to determine the response of a beam-like structure (a beam on mass-spring supports, a model of a railway track) subjected to a moving constant force. Numerical solutions, including also a pair of moving forces, were given.
6. J C O Nielsen: Eigenfrequencies and eigenmodes of beam structures on elastic foundation. Journal of Sound and Vibration, Vol 145(3), pp 479-487, 1991
   SUMMARY: A method for determining the eigenfrequencies of continuous structures containing beams in plane bending-shearing vibration was presented. Each beam member may rest on a general Winkler-type elastic foundation (including the Pasternak foundation as a special case) and may carry a large static axial load calling for use of a second-order theory. The method could preferably be implemented in the Wittrick-Williams bisection algorithm. A numerical verification was given for a repetitive structure where an alternative solution is available through the use of exact difference equations. Practical applications to a rail/pad/sleeper system on its ballast and roadbed were foreseen.
7. J C O Nielsen and T J S Abrahamsson: Complex eigensolutions used for beam structures on elastic foundation loaded by moving nonlinear dynamic systems. Ninth International Modal Analysis Conference, 15-18 April 1991, Florence, Italy, Proceedings, vol 2, pp 1110-1116, Union College, Schenectady NY, 1991
8. L Ågårdh: Reinforced concrete sleepers. Determination of resonance frequencies, modal dampings and modal shapes by use of experimental modal analysis (in Swedish), The Swedish National Testing Institute, Report SP-AR 1009-09, Byggnadsteknik, Borås, Sweden, 43 pp, 1990
9. T Dahlberg and J C O Nielsen: Dynamic behaviour of free-free and in-situ concrete railway sleepers. International Symposium on Precast Concrete Railway Sleepers, 8-11 April 1991, Madrid, Spain, Proceedings, pp 393-416, Colegio de Ingenieros de Caminos, Canales y Puertos, Madrid, Spain (also Report F138, Division of Solid Mechanics, Chalmers University of Technology, Gothenburg, Sweden, 1991, 17 pages)
   SUMMARY: The dynamic behaviour of free-free and in-situ concrete railway sleepers was studied. A method developed by Nielsen (reference 6 above) to calculate eigenfrequencies and eigenmodes of general beam structures on a general elastic foundation was used. Measurements on free-free precast concrete railway sleepers have been performed. Calculated and measured eigenfrequencies and eigenmodes in bending vibration in the vertical plane of the sleepers were compared. It was found that, except for the lowest two bending mode eigenfrequencies, the refined Rayleigh-Timoshenko beam theory was required for the eigenfrequency and eigenmode calculations. The natural frequencies of a beam on an elastic foundation (i. e., the in-situ sleeper) will differ from those obtained for the free-free beam (sleeper). The foundation introduces two eigenfrequencies coupled to two almost rigid-body eigenmodes (translation and rotation) of the sleeper. The lower eigenfrequencies in bending are also influenced by the foundation stiffnesses, whereas higher eigenfrequencies are almost unaffected. Dynamic responses (bending moments) of a sleeper as a component in a track structure subjected to transient excitation were investigated. It was found that an irregular rail profile had a significant influence on the dynamic responses.
10. J C O Nielsen and T J S Abrahamsson: Coupling of physical and modal components for analysis of moving nonlinear dynamic systems on general beam structures. International Journal for Numerical Methods in Engineering, Vol 33, pp 1843-1859, 1992 (also Division of Solid Mechanics, Chalmers University of Technology, Gothenburg, Sweden, 22 pp, 1990)
    SUMMARY: A general, well-structured and efficient method is advanced for the solution of a large class of dynamic interaction problems including a nonlinear dynamic system running at a prescribed time-dependent speed on a linear track or guideway. The method uses an extended state-space vector approach in conjunction with a complex modal superposition. It allows for the analysis of structures containing both physical and modal components. The physical components studied here are vehicles modelled as linear or nonlinear discrete mass-spring-damper systems. The modal component studied is a linear continuous model of a track structure containing beam elements which can be generally damped and which can be embedded in a three-parameter damped Winkler-type foundation. The complex modal parameters of the track structure are solved for. Algebraic equations are established which impose constraints on the transverse forces and accelerations at the interfaces between the moving dynamic systems and the track. An irregularity function modelling a given nonstraight profile of the nonloaded track or a noncircular periphery of the wheels is also accounted for. Loss of contact and recovered contact between a vehicle and the track can be treated. The system of coupled first-order differential equations governing the motion of the vehicles and the track and the set of algebraic constraint equations are together compactly expressed in one unified matrix format. A time-variant initial-value problem is thereby formulated such that its solution can be found in a straight-forward way by use of standard time-stepping methods implemented in existing subroutine libraries. Examples for verification and application of the proposed method are given. The present study should be of particular value in railway engineering.
11. Å Fenander and A Igeland: Nonlinear vehicles on randomly profiled tracks - Monte Carlo simulation of excitation and frequency analysis of response. Report T127, Division of Solid Mechanics, Chalmers University of Technology, Gothenburg, Sweden, 21 pp, 1991
12. T Dahlberg, Å Fenander, A Igeland and J Nielsen: Railway vehicle on randomly profiled track. Proceedings Skandinavisk forum for stokastisk mekanik II, Instituttet for Bygningsteknik, Aalborg Universitetscenter, Aalborg, Denmark (also Report F150, Division of Solid Mechanics, Chalmers University of Technology, Gothenburg, Sweden, 12 pp, 1991)
    SUMMARY: A method has been developed, implemented and applied for the study of the dynamic vertical interaction between a moving dynamic system (a vehicle) and a continuous beam structure (the track). The dynamic interaction problem is solved in a unified manner by use of an extended state-space vector approach. The time-variant initial-value problem is formulated in such a way that its solution can be found by use of a standard time-stepping method. An initial random irregularity of the track height profile (an irregularity on the railhead) and/or an initial random out-of-roundness of the wheel may be handled. In this report the wheel/rail contact force is analysed when the rail height profile has a random irregularity.
13. J C O Nielsen: Nonlinear vehicles traversing a rail structure. Thesis for the Degree of Licentiate of Engineering, Division of Solid Mechanics, Chalmers University of Technology, Gothenburg, Sweden, 1991, 4 pp and two appended papers
14. J C O Nielsen: Dynamic interaction between wheel and track - A parametric search for best performance of railway tracks. Vehicle System Dynamics, Vol 23, No 2, pp 115-132, 1994 (also Report F147, Division of Solid Mechanics, Chalmers University of Technology, Gothenburg, Sweden, 1991)
    SUMMARY: The dynamic vertical interaction between a moving rigid wheel and a flexible railway track was studied. A round and smooth wheel tread and an initially straight and noncorrugated rail surface were assumed. A linear three-dimensional beam structure model of a finite portion of the track was suggested including rails, pads, sleepers and ballast with spatially nonproportional damping. The full interaction problem was numerically solved by use of an extended state-space vector approach in conjunction with complex modal superposition for the track. Transient bending stresses in sleepers and rails were calculated. The influence of seven selected track parameters on the dynamic behaviour of the track was investigated. A two-level fractional factorial design method was used in the search for a combination of numerical levels of these parameters making the maximum bending stresses a minimum.
15. M Fermér and J C O Nielsen: Wheel/rail contact forces for flexible versus solid wheels due to tread irregularities. Proceedings of the 13th IAVSD Symposium on the Dynamics of Vehicles on Roads and on Tracks, Chengdu, China, 23-27 august 1993, pp 142-157
16. J C O Nielsen and M Fermér: Vertical dynamic train/track interaction - Verifying a theoretical model by full-scale experiments. Twelfth International Modal Analysis Conference, Jan 31 - Feb 3, 1994, Honolulu, HI, Proceedings, Vol 2, pp 1583-1590, Union College, Schenectady NY, 1994
    SUMMARY: of 15 and 16: The vertical dynamic behaviour of a railway vehicle with flexible wheels is compared to that of a vehicle with standard solid wheels. Full-scale field experiments performed on a portion of a recently built railway track for high-speed trains are reported. Flexible and solid wheels without and with wheelflats were instrumented for measurement of transient vertical wheel/rail contact forces. Accelerations and strains in the track structure were measured in parallel. The location of the instrumented wheelset in relation to the instrumented portion of the track was determined at each instant of time. Flexible wheels are shown to considerably reduce the contact forces. A linear mathematical model of the track is suggested based on a previously reported technique for solving vertical interaction problems. Track parameters determined at the test-site are used as input to the model. Numerical results show acceptable agreement with measured responses.
17. J C O Nielsen and A Igeland: Vertical Dynamic Interaction between Train and Track - Influence of Wheel and Track Imperfections. Report F169, Division of Solid Mechanics, Chalmers University of Technology, Gothenburg, Sweden, 1993, 19 pp. Accepted for publication in Journal of Sound and Vibration.
    SUMMARY: The vertical dynamic behaviour is investigated for a railway bogie moving on a rail which is discretely supported, via railpads, by sleepers resting on an elastic foundation. The transient interaction problem is numerically solved by use of an extended state-space vector approach in conjunction with a complex modal superposition for the track. Application examples are given in which the influences of three types of practically important imperfections in the compound vehicle/track system are investigated. The first is a sinusoidal corrugation of the railhead and the second a skid flat on the wheel tread (a wheelflat). The third imperfection is a case where a single sleeper has lost its support due to erosion of the ballast. Physical explanations of the calculated interaction behaviour are given.
18. J C O Nielsen: Train/track interaction. Coupling of Moving and Stationary Dynamic Systems - Theoretical and Experimental Analysis of Railway Structures Considering Wheel and Track Imperfections. Dissertation, Division of Solid Mechanics, Chalmers University of Technology, Gothenburg, Sweden, 1993, 17 pp and five appended papers
19. J C O Nielsen: DIFF - A computer program for numerical analysis of vertical dynamic train/track interaction. Theory manual and User's manual. Publication no 34, Division of Solid Mechanics, Chalmers University of Technology, Gothenburg, Sweden, 1994, 77 pp
20. M Fermér and J C O Nielsen: Vertical interaction between train and track with soft and stiff railpads - full-scale experiments and theory. Proceedings of the Institution of Mechanical Engineers, Part F: Journal of Rail and Rapid Transit, Vol 209 No F1, pp 39-47, 1995 (Report F175, Division of Solid Mechanics, Chalmers University of Technology, Gothenburg, Sweden, 1994, 30 pp)
    SUMMARY: The vertical dynamic interaction between a running freight wagon and a tangent railway track has been investigated experimentally and numerically. Standard solid wheels without and with wheelflats were instrumented for measurement of transient vertical wheel/rail contact forces. Accelerations and strains in the track structure were measured in parallel. The location of the instrumented wheelset in relation to the instrumented portion of the track was determined at each instant of time. A portion of the track was equipped with railpads considerably stiffer than the soft ones used as standard in Sweden. The influence of train speed and axle load on dynamic responses was studied and compared for the two test sites. Track parameters determined at the test site were used as input to a mathematical model. Numerical results show acceptable agreement with measured responses. In the presence of wheelflats, dynamic contact forces were largely affected by pad stiffness. However, for some of the loading cases investigated, it was observed that soft pads did not always lead to lower contact forces. Maximum dynamic responses generally increased with increasing train speed.
21. T Dahlberg: Rail corrugation formation - A literature survey. Report F158, Solid Mechanics, CTH, Gothenburg 1993, 10 pp
22. A Igeland: Railhead Corrugation Growth on Tangent Tracks. In Railhead Corrugation on Tangent Tracks - Consequences and Causes, Thesis for Degree of Licentiate of Engineering, Report F173, Division of Solid Mechanics, Chalmers University of Technology, Gothenburg, Sweden, 24 pp, 1994
23. A Igeland: Dynamic train/track interaction can explain rail corrugation growth. Proceedings of the 13th International Modal Analysis Conference, Nashville, Tennessee USA, 1995, pp 126-132 (condensed version of 22)
24. A Igeland: Railhead corrugation growth explained by dynamic interaction between track and bogie wheelsets. Submitted September 1995 for publication in Proceedings of the Institution of Mechanical Engineers, Part F Journal of Rail and Rapid Transit
    SUMMARY: of references 22, 23, 24: Railhead corrugation growth on tangent tracks due to wear from driven locomotive wheels is investigated. The study sets out from an assumed random initial railhead irregularity. Measurements on a newly-built track are exploited. The wear is assumed to be a function of creep and friction force. A semi-empirical relationship between creep, friction force and normal contact force based on rolling contact mechanics is employed. Only longitudinal creep and creep forces are taken into account. The normal contact forces between the moving wheels and the rail are determined by use of a time-stepping method, allowing for a non-linear hertzian contact stiffness, together with complex modal superposition for the track structure. Numerical examples are given. It is found that the two wheelsets of a travelling bogie interact and should be considered in the same calculation. The bogie wheelbase is an important parameter.
25. A Igeland: Time domain solution of the dynamic interaction between railroad structures and moving loads. The Third International Congress on Industrial and Applied Mathematics, Hamburg, 3-7 July 1995, 4 pp
26. Å Fenander: In situ stiffness of railway pads evaluated through comparison between measurements and calculations. Report F160, Division of Solid Mechanics, Chalmers University of Technology, Gothenburg, Sweden, 8 pp, 1993
    SUMMARY: Eigenfrequencies have been measured in the laboratory for a free-free concrete railway sleeper with a piece of rail attached to the sleeper and with different railpads between sleeper and rail. In parallel, a finite element model of the sleeper with pad and rail has been developed and eigenfrequencies have been evaluated. The results of measurements and calculations are compared. By adapting the pad stiffness in the calculation model to reproduce the measured eigenfrequencies one may estimate the real stiffness of different pads. The value of pad stiffness is found to have a great influence on some eigenfrequencies and less influence on others.
27. Å Fenander: Modelling Damping by Use of Fractional Derivatives. Thesis for the Degree of Licentiate of Engineering, Division of Solid Mechanics, Chalmers University of Technology, Gothenburg, Sweden, 22 pp, 1994
28. Å Fenander: Modal Synthesis when Modelling Damping by Use of Fractional Derivatives. Proceedings of 36th AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics and Materials Conference, New Orleans, April 10-13 1995, pp 221-230
29. Å Fenander: Modal Synthesis when Modelling Damping by Use of Fractional Derivatives. Paper submitted June 1995 for possible publication in AIAA Journal, 10 pp
    SUMMARY: of references 27, 28, 29: The fractional derivative damping model is compared to other damping models used for mechanical systems. In some examples, which are solved in the Fourier domain, the influence of the different parameters in the fractional derivative model is studied. For large structures, modal synthesis can be used to solve the equations of motion in the time domain. A state-space vector, containing fractional derivatives of the displacement, is then introduced. The resulting system of equations is decoupled by use of the complex eigenvectors of the system. The solutions of the decoupled equations are superposed, weighted by the eigenmodes, to give the response of the structure. A method to reduce the computational effort is suggested.
30. T Dahlberg: Dynamic interaction between train and track - calculations and full-scale experiments. Nordic Conference on Vehicle and Machine Vibrations, September 6-8 1994, on board Silja Europa. Swedish Vibration Society WG2 SVIB-AU2, and the Royal Swedish Academy of Engineering Sciences IVA, 12 pp
31. T Dahlberg: Dynamic interaction between train and track - calculations and full-scale experiments. Proceedings 3rd International Conference on Traffic Effects on Structures and Environment, September 13-16 1994, The High Tatras (Strbské Pleso), Slovakia, Vol I, pp 93-101
32. T Dahlberg: Vertical dynamic train/track interaction - verifying a theoretical model by full-scale experiments. Proceedings of the 3rd Herbertov Workshop, Interaction of Railway Vehicles with the Track and its Substructure, September 19-23 1994, Herbertov, Czech Republic. Supplement to Vehicle System Dynamics, Vol 24, pp 45-57, 1995. Swets & Zeitlinger, Lisse. (Also Report F176, Division of Solid Mechanics, Chalmers University of Technology, Gothenburg, Sweden, 13 pp, 1995)
    SUMMARY: of 30, 31 and 32: A numerical method has been developed by which the dynamic behaviour of railway track and vehicle components may be investigated. Parameters such as speed, axle load, wheel base of a bogie, rail corrugations, wheelflats etc may be taken into account. In order to verify the computational method, a full-scale measurement program was accomplished on the West Coast line in Sweden. Test results are presented and compared to calculations. In order to investigate the influence of pad stiffness, the soft railway pads were replaced by stiffer pads along a limited portion of the track. These measurements are discussed in [31].

Articles and reports

1. T Dahlberg and J Nielsen: En studieresa till England. Report F160, Division of Solid Mechanics, Chalmers University of Technology, Gothenburg, Sweden, 8 pp, 1993
2. T Dahlberg: Dynamic interaction between railway vehicle and track. Final report of a three-year railway engineering research program. Report F140, Division of Solid Mechanics, Chalmers University of Technology, Gothenburg, Sweden, 20 pp, 1991
3. T Dahlberg: Dynamisk interaktion mellan tåg och bana, Modern Järnväg, No 3, pp 14-15, 1991
4. J Nielsen: Spårmodeller för studium av vertikal samverkan mellan fordon och bana. Dokumentation till doktorandkurs TC911, Samverkan fordon/bana, KTH, 8 pp, 1991
5. T Dahlberg, R Lundén and B Åkesson: Report of Railway Engineering Research at Chalmers University in Gothenburg, Proc Instn Mech Engrs, Part F: Journal of Rail and Rapid Transit, Vol 206, pp 145-148, 1992
6. T Dahlberg, R Lundén and B Åkesson: Railway Engineering Research at Chalmers, Proceedings VTI:s och TFB:s Forskardagar, Linköping, 8-9 January 1992, pp 234-240
7. T Dahlberg and J Nielsen: Dynamic interaction between wheel and track - A parametric search towards an optimal design of rail structures, Proceedings VTI:s och TFB:s Forskardagar, Linköping, 8-9 January 1992, pp 242-250
8. T Dahlberg, S Westberg and B Åkesson: Modelling the dynamic interaction between train and track, Railway Gazette International, June 1993, 407, 409, 411-412
9. T Dahlberg: Dynamisk samverkan mellan tåg och spår, CIC-Nytt (Chalmers Innovationscentrum), Vol 13 No 2, pp 36-38, 1993
10. T Dahlberg: Stokastiska svängningar - med speciell tillämpning på fordonsvibrationer, Skrift U60, Hållfasthetslära, CTH, Göteborg 1993, 92 pp
11. T Dahlberg, B Paulsson and B Åkesson: Dynamisk samverkan mellan tåg och spår - beräkningar och fullskaleexperiment, Proceedings VTI:s och KFB:s Forskardagar, Linköping, 12-13 January 1994, 7 pp
12. J Nielsen: Forskning för bättre järnvägsspår, SVEN (Swedish Vehicular Engineering News Forum) No 1, 1994, p 7
13. T Dahlberg, S Hammarlund and Å Jahlenius: Goose Hill measurements confirm X2000's low dynamic track forces, Railway Gazette International, Vol 150, No 7, pp 439-444, July 1994
14. T Dahlberg: Tåginducerade vibrationer i järnvägsspår - beräkningsmodell och fullskaleexperiment. Nordisk Järnbane Tidskrift, Årg 120, Nr 1994:5, pp 16-17
15. T Dahlberg: Järnvägsforskning vid Chalmers hållfasthetslära, Modern Järnväg, Juni, 1995
16. T Dahlberg: Spårdynamik och höga axellaster, Konferensrapport från seminarium om Gångdynamisk simulering och prediktering av underhållsrelaterade spårkrafter vid höga axellaster, Banverket och Luleå tekniska högskola, Luleå, Maj 1995, 5 sidor

Student reports

1. G Johansson, P Skoglund and L-G Skötte: Dynamic effects of a high speed train on a bridge (in Swedish), Student Report, Division of Solid Mechanics, Chalmers University of Technology, Gothenburg, Sweden, 37 pp, 1983
2. S Alfredsson, O Arnez, R Svensson and A Wibrink: Interaction between vehicle and rail (in Swedish), Student Report, Division of Solid Mechanics, Chalmers University of Technology, Gothenburg, Sweden, 36 pp, 1988
3. A Andersson, L Bergman, M Enelund and R Malkolmsson: Dynamic interaction between train and track (in Swedish), Student Report, Division of Solid Mechanics, Chalmers University of Technology, Gothenburg, Sweden, 42 pp, 1990
4. F Hansson, P Mellander, Y Saberi-Majd and A Shahdaei: Non-linear vehicle on bridge with random road profile (in Swedish), Student Report, Division of Solid Mechanics, Chalmers University of Technology, Gothenburg, Sweden, 50 pp, 1991
5. P Johansson, C Linusson, U Lindstedt and L Zetterberg: The role of rail pads in a railway model (in Swedish), Student Report, Division of Solid Mechanics, Chalmers University of Technology, Gothenburg, Sweden, 31 pp, 1992
6. P Govik, B Lennartsson, S Petersen, S Thynelius, E Tivesten and J Östberg: Dynamic properties of railway tracks (in Swedish), Student Report, Division of Solid Mechanics, Chalmers University of Technology, Gothenburg, Sweden, 63 pp, 1993
7. M Ericson, J Frendin, L Nordström, P Sandberg and R Torsein: Railway track vibrations - some dynamic models (in Swedish), Student Report, Division of Solid Mechanics, Chalmers University of Technology, Gothenburg, Sweden, 48 pp, 1994
8. A T A de Brito and D A Coelho: Theoretical and experimental analysis of railway beams, Student Report, Division of Solid Mechanics, Chalmers University of Technology, Gothenburg, Sweden, 28 pp, 1994
9. D A Coelho: Dynamic analysis of the overhead contact line (in electrically powered railway systems), Student Report, Division of Solid Mechanics, Chalmers University of Technology, Gothenburg, Sweden, 6 pp, 1994
10. T Broberg, P Johansson, P A Jönsson, S Larsson and U Lång: Railway track vibrations - a Benchmark test and a sleeper vibration study, Student Report, Division of Solid Mechanics, Chalmers University of Technology, Gothenburg, Sweden, 46 pp, 1995