Fatigue life evaluation of welded joints considering the local multiaxial stress/strain states and numerically determined residual stresses/strains

被引：0
作者：
Wei Shen
Renjun Yan
Xiaoxing Wang
Enqian Liu
Lin Xu
机构：
[1] Ministry of Education,Key Laboratory of High Performance Ship Technology (Wuhan University of Technology)
[2] University of Strathclyde,Department of Naval Architecture and Marine Engineering
来源：
International Journal of Steel Structures | 2017年 / 17卷
关键词：
Welding joint; residual stress; FEA; fatigue damage; multiaxial fatigue test;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
This paper puts forward a kind of calculation method of estimating fatigue crack initiation life by considering welding residual stresses as initial stresses. The numerical method could be used to quantitatively analyze the influence of residual stresses on the cumulative fatigue damage. In order to gain the distribution of weld-induced residual stresses, the FE analyses as well as measurements were carried out. Based on critical plane approach, analysis of damage parameters was performed considering both welding residual stress and biaxial loads. Subsequently, validity of the proposed numerical method is verified by analyzing fatigue test results for several typical welded joints. It is concluded that the result of the present method is closer to the experimental value than that obtained with empirical formula method in the estimation of fatigue crack initiation life of welded structures.
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页码：139 / 153
页数：14
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