ICRI Project: Friction Modelling

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Friction Modelling

Friction Modelling

Leaders: Klaus Six, Virtual Vehicle and Edwin Vollebregt, VORtech

Description: Friction in the wheel-rail contact is an important part of this complex tribological system and therefore has a high influence on Vehicle Track Interaction (VTI). To realize high quality VTI predictions (vehicle/traction/braking dynamics, wear, damage, etc.), reliable friction models taking into account the most important tribological phenomena are of high importance.

Status: VORtech received research funding from the US FRA for improved modeling of creep-forces. Physics-based sub-models for temperature and solid third-body layers have been developed and implemented into CONTACT. Further, CONTACT was implemented in GENSYS, UM, NUCARS and SIMPACK, and used to simulate measurements of NRC’s full-scale wheel, brake and bearing test-rig. The final report is submitted to the FRA and is going through an editorial process.

Sheffield University & Virtual Vehicle & LBFoster received research funding of the FRA, for developing a model to predict carry down, consumption and related friction of TOR friction modifier products applied by field side application devices.  Small-scale and full-scale experiments have been carried out. Furthermore, a theoretical model has been developed which has been parameterized and validated by the experimental data. The work has been published at the TRB-2019 conference [1] and the IAVSD-2019 conference [2]. The final report is currently being finalized.

Last review: 08MAR18 see Downloads

Publications:

[1] K. Six, Z.S. Lee, G. Trummer, R. Lewis, Testing and modeling the effects of friction modifiers on creep forces in the wheel-rail interface, in: The Transportation Research Board (TRB) 98th Annual Meeting (2019), Washington, D.C., USA.

[2] Z.S. Lee, G. Trummer, K. Six, R. Lewis, Wheel/rail creep force model for wayside application of top of rail products incorporating carry on and consumption effects, in: 26th International Symposium on Dynamics of Vehicles on Roads and Tracks (IAVSD2019), Gothenburg, Sweden.

 

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