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Civil-Comp Proceedings
ISSN 1759-3433
CCP: 104
Edited by: J. Pombo
Paper 234

Multi-Interfacial Contact Behaviours of an Axle Roller Bearing Assembly of Railroad Cars

L.L. Guo1,2,3, H. Xi1,2, W. Chang1,3, J.S. Yan2, X. Hu2, X. Zhang1,3, H.Y. Wang5, S.Y. Song4, S.N. Xu4, K.J. Diao6, H. Xu1 and F.C. Wang1,2,4

1iBT Group, School of Mechanical Engineering, Xi'an Jiaotong University, China
2Railway & Tribology Centre, School of Mechanical Engineering, Wuhan University of Science & Technology, China
3Institute of Bearing Technology, United Manufacturing Groups (UMG), Yinchuan, China
4National Centre of Bearing Technology, China
5Bradford Grammar School, United Kingdom
6Sifang Rolling Stock Research Institute, Qingdao, China

Full Bibliographic Reference for this paper
L.L. Guo, H. Xi, W. Chang, J.S. Yan, X. Hu, X. Zhang, H.Y. Wang, S.Y. Song, S.N. Xu, K.J. Diao, H. Xu, F.C. Wang, "Multi-Interfacial Contact Behaviours of an Axle Roller Bearing Assembly of Railroad Cars", in J. Pombo, (Editor), "Proceedings of the Second International Conference on Railway Technology: Research, Development and Maintenance", Civil-Comp Press, Stirlingshire, UK, Paper 234, 2014. doi:10.4203/ccp.104.234
Keywords: axle bearings, railroad cars, contact mechanics, finite element model, multi-interfacial contact model (MCM), clearance difference.

A complex multi-interfacial contact mechanics model of an axle roller bearing, assembly under the given loading condition, was developed by the finite element method (FEM). The journal deformation and the multi-interfacial contact problem of two bearings of an axle bearing system, mounted on the journal of wheel shaft, were also considered. Subsequently, the multi-interfacial contact mechanics model was applied for the study of axial and radial contact load and deformation, as well as stress distribution of axle bearing assembly with two cylindrical roller bearing units, under the given conditions of loading and design parameters. It was found that there was a significant effect of journal deformation both on the radial contact load of roller against ring and the axial contact loads of roller end against ring flange in the axle bearing assembly. Additionally, the well-controlled design parameters of interfacial clearance and clearance difference of two bearings can improve the uniformed contact performance of the axle bearing assembly. The multi-interfacial contact model can be effectively employed to identify the design and manufacturing technology, as well as its application to axle bearings of railway cars during the operating condition.

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