A 2D peridynamic model for fatigue crack initiation of railheads

被引：27
|
作者：
Ma, Xiaochuan [1 ,2 ]
Xu, Jinhui [1 ]
Liu, Linya [1 ]
Wang, Ping [2 ]
Feng, Qingsong [1 ]
Xu, Jingmang [2 ]
机构：
[1] East China Jiaotong Univ, Engn Res Ctr Railway Environm Vibrat & Noise, Minist Educ, Nanchang 330013, Jiangxi, Peoples R China
[2] Southwest Jiaotong Univ, MOE Key Lab High Speed Railway Engn, Chengdu 610031, Peoples R China
来源：
INTERNATIONAL JOURNAL OF FATIGUE | 2020年 / 135卷
基金：
中国国家自然科学基金;
关键词：
Fatigue; Peridynamic theory; Railhead cracks; Initiation; Wheel-rail contact; RAIL; WEAR; PREDICTION;
D O I：
10.1016/j.ijfatigue.2020.105536
中图分类号：
TH [机械、仪表工业];
学科分类号：
0802 ;
摘要：
Due to the use of PDEs (Partial Differential Equations), classical continuum mechanics is difficult to solve the problems of discontinuous deformation. Using integral equations, peridynamic theory can overcome this difficulty. A 2D method for predicting fatigue crack initiation of railheads was presented based on the peridynamic theory. First, the reasonable values of the model parameters were analyzed. Second, the accuracy of the method was verified through comparisons with the results of classical continuum mechanics and existing conclusions in the literature. Finally, the effects of wheel-rail rolling-sliding status, friction coefficient, and wheel load on fatigue crack initiation were analyzed and discussed.
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页数：12
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