Peridynamic analysis of rolling contact fatigue crack propagation in rail welding joints with pore defects

被引：1
作者：
Li, Shirui [1 ,2 ]
Wang, Xiaoming [1 ,2 ]
Dong, Weijia [1 ,2 ]
He, Qing [1 ,2 ]
An, Boyang [1 ,2 ]
Wang, Ping [1 ,2 ]
Yang, Bing [3 ]
机构：
[1] Southwest Jiaotong Univ, MOE Key Lab High Speed Railway Engn, Chengdu 610031, Peoples R China
[2] Southwest Jiaotong Univ, Sch Civil Engn, Chengdu 610031, Peoples R China
[3] Southwest Jiaotong Univ, State Key Lab Rail Transit Vehicle Syst, Chengdu 610031, Peoples R China
来源：
INTERNATIONAL JOURNAL OF FATIGUE | 2025年 / 190卷
基金：
中国国家自然科学基金;
关键词：
Rail welding joint; Rolling contact fatigue; Peridynamics; Crack growth; Pore defects; FRACTURE; FAILURE; MODEL; GROWTH;
D O I：
10.1016/j.ijfatigue.2024.108612
中图分类号：
TH [机械、仪表工业];
学科分类号：
0802 ;
摘要：
Pore defects are prevalent in rail welding joints and significantly contribute to the propagation of fatigue cracks. This study develops a peridynamic (PD) model that incorporates the characteristics of pore defects to analyze their impact on rolling contact fatigue behavior. Initially, compact tension (CT) fatigue tests were performed to derive and validate the bond fatigue failure model specific to rail weld materials. Subsequently, pore defects were modeled as holes in the CT specimens, with experimental results being compared to PD simulation outcomes for validation. Finally, a wheel-rail contact PD model was constructed to investigate the mechanisms of fatigue crack propagation in rail welding joints affected by pore defects.
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页数：17
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