Elastoplastic modelling of subsurface crack growth in rail/wheel contact problems

被引：0
|
作者：
Lunden, R. [1 ]
机构：
[1] Chalmers Univ Technol, CHARMEC, Dept Appl Mech, S-41296 Gothenburg, Sweden
来源：
FATIGUE & FRACTURE OF ENGINEERING MATERIALS & STRUCTURES | 2007年 / 30卷 / 10期
关键词：
crack propagation; strip-yield model; subsurface crack;
D O I：
10.1111/j.1460-2695.2007.01160.x
中图分类号：
TH [机械、仪表工业];
学科分类号：
0802 ;
摘要：
Propagation of small subsurface cracks subjected to shear under repeated rolling contact load is studied. An analytical crack model (Dugdale) with plastic strips at the two crack tips is employed. Compressive stresses promoting crack closure and friction between crack faces are considered. The triaxial stress state is used in the yield criterion. A damage criterion is suggested based on experimental LCF data. In a numerical study, critical crack lengths are found below which propagation of an existing crack should be effectively suppressed.
引用
收藏
页码：905 / 914
页数：10
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