文献类型：期刊文献

英文题名：Verification of stress transfer mechanism in fatigue crack growth under overload

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

年份：2023

卷号：128

外文期刊名：THEORETICAL AND APPLIED FRACTURE MECHANICS

收录：;EI(收录号：20234114860986);WOS:【SCI-EXPANDED(收录号:WOS:001091095200001)】；

基金：This work was supported by the National Natural Science Foundation of China (Grant No. 51835003) and by Innovation Program of Shanghai Municipal Education Commission (2023ZKZD42) .

语种：英文

外文关键词：Fatigue crack growth; Overload effect; Stress transfer; Crack tip blunting; Crack closure

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.