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PROCEEDINGS OF THE SECOND INTERNATIONAL CONFERENCE ON RAILWAY TECHNOLOGY: RESEARCH, DEVELOPMENT AND MAINTENANCE
Edited by: J. Pombo
Numerical Analysis of High-Speed Wheel/Rail Adhesion Considering Non-Newtonian Interfacial Liquids, Elastic-Plastic Contact and Temperature
B. Wu, Z. Wen, H. Wang, M. Zhu and X. Jin
State Key Laboratory of Traction Power, Southwest Jiaotong University, Chengdu, China
B. Wu, Z. Wen, H. Wang, M. Zhu, X. Jin, "Numerical Analysis of High-Speed Wheel/Rail Adhesion Considering Non-Newtonian Interfacial Liquids, Elastic-Plastic Contact and Temperature", in J. Pombo, (Editor), "Proceedings of the Second International Conference on Railway Technology: Research, Development and Maintenance", Civil-Comp Press, Stirlingshire, UK, Paper 14, 2014. doi:10.4203/ccp.104.14
Keywords: wheel-rail adhesion, interfacial liquid, elastic-plastic asperity contact, thermal, non-Newtonian.
The aim of this paper is to develop a numerical model to study the adhesion characteristics of wheel/rail at the high-speed rolling/sliding condition under water or oil contamination. A non-Newtonian thermal line contact model including roughness effect under water or oil contamination is proposed. The Eyring rheology model is used to describe the non-Newtonian flow of the lubricant. The statistical elastic-plastic asperity micro-contact model by Zhao et al. (ZMC) is applied to obtain the asperity contact pressure. Through the detailed numerical analysis, the pressure field of both the interfacial liquids and the elastic-plastic asperity contact and the temperature field can be obtained under liquid contamination. The present work also gives a primary discussion on the effect of train speed on the wheel/rail adhesion. The numerical results show that the train speed affects the wheel/rail adhesion significantly.
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