Experimental Verification and Estimation of Fatigue Crack Growth Delay due to Single Overload

被引：1
|
作者：
Wu, Hao [1 ]
Zhu, Jun [2 ]
机构：
[1] Tongji Univ, Sch Aerosp Engn & Appl Mech, Shanghai 200092, Peoples R China
[2] Nantong Taisheng Blue Isl Offshore Co Ltd, Nantong 226259, Peoples R China
来源：
ADVANCES IN MATERIALS SCIENCE AND ENGINEERING | 2022年 / 2022卷
基金：
中国国家自然科学基金;
关键词：
PREDICTION; CONSTANT; CLOSURE; PROPAGATION; MODEL; LIFE; HOLE;
D O I：
10.1155/2022/3715840
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
A novel crack driving force parameter based on the plastic zone size for overload/constant amplitude loading is proposed to estimate the fatigue crack growth (FCG) and the beneficial fatigue life due to overload. By considering the stress distribution in the plastic zone, the effective stress intensity factor (SIF) integrated from equivalent residual stress is presented. It is illustrated that the FCG rate decreases rapidly after overload and then gradually returns to the baseline FCG rate. Besides, the overload ratio R-pic has a significant influence on the affected length a(d) and the beneficial fatigue life N-d.
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页数：10
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