Verification of stress transfer mechanism in fatigue crack growth under overload

被引：5
|
作者：
Wang, Chen [1 ]
Chen, Rong [1 ]
Guo, Su-Juan [1 ]
Zhu, Ming-Liang [1 ]
Xuan, Fu-Zhen [1 ]
机构：
[1] East China Univ Sci & Technol, Sch Mech & Power Engn, Key Lab Pressure Syst & Safety, Minist Educ, Shanghai 200237, Peoples R China
来源：
THEORETICAL AND APPLIED FRACTURE MECHANICS | 2023年 / 128卷
基金：
中国国家自然科学基金;
关键词：
Fatigue crack growth; Overload effect; Stress transfer; Crack tip blunting; Crack closure; MESH REFINEMENT; CLOSURE; PROPAGATION;
D O I：
10.1016/j.tafmec.2023.104104
中图分类号：
TH [机械、仪表工业];
学科分类号：
0802 ;
摘要：
Cyclic plastic finite element modeling was carried out to investigate effect of overload on fatigue crack growth under blunting and no-blunting mechanisms at different overload ratios. The stress transfer mechanism was verified and was found more obvious in the case of crack blunting though its effect was time-limited. The level of crack closure varied periodically due to gradual relaxation of compressive residual stress during crack propagation. Both the overload plastic zone and the overload affected zone were linearly correlated with overload ratio, and an overload ratio value of 1.1 was the best choice for studying overload effect.
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页数：9
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