Research on the Damage Mechanism of Rolling Contact Fatigue of Wheel-Rail Contact Under the Influence of Wheel Surface Defects

作     者：Chen, Daoyun Zhong, Minshi Mou, Minghui Xiao, Qian Liu, Xinlong Yang, Wenbin Zhu, Shaoguang Liu, Baochen Lin, Fengtao 

作者机构：Railway Industry Key Laboratory of Intelligent Operation and Maintenance of Rolling Stock East China Jiaotong University Nanchang330013 China State Key Laboratory of Performance Monitoring Protecting of Rail Transit Infrastructure East China Jiaotong University Nanchang330013 China School of Transportation Engineering East China Jiaotong University Nanchang330013 China Network and Information Center East China Jiaotong University Nanchang330013 China China Academy of Railway Sciences Corporation Limited Beijing100081 China 

出 版 物：《SSRN》 

年 卷 期：2024年

核心收录：

主　　题：Surface defects 

摘      要：Severe rolling contact fatigue(RCF) can be affected by wheel surface defects, which will threaten the operational safety of rail vehicles. In order to explore the wheel RCF damage mechanism under the influence of surface defects, this study used an indentation device to prepare surface defects. Twin-disc RCF and wear test and finite element analysis (FEA) were conducted, and the influence of surface defects on wheel RCF damage was explored by observing the surface and cross-section of wheel defects. The results show that as the number of rolling increases, the RCF crack generates in the maximum stress concentration area of ​​the defect, that is, the middle edge area of ​​the defect, and expands in a C shape. The leading edge of the defect spalls off first due to the large amount of laminar cracks. As the cracks continue to propagate, eventually large pieces of spalling can be seen. The FEA results show that the residual stress distributed on the shoulder around the defect is the largest. The maximum residual tensile stress is located on the lower surface of the defect and the largest stress concentration is located on both sides of the middle edge of the defect when the wheel is rolling. © 2024, The Authors. All rights reserved.