|Table of Contents|

Citation:
　Haiyang Gao,Guangen Luo,Pengfei Xu,et al.Mutual Influence of Welding Residual Stress Redistribution and Surface Crack Propagation[J].Journal of Marine Science and Application,2026,(2):561-574.[doi:10.1007/s11804-025-00626-3]
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Mutual Influence of Welding Residual Stress Redistribution and Surface Crack Propagation

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Title:
Mutual Influence of Welding Residual Stress Redistribution and Surface Crack Propagation
Author(s):
Haiyang Gao;  Guangen Luo;  Pengfei Xu;  Ying Chai;  Liangbi Li
Affilations:
Author(s):
Haiyang Gao;  Guangen Luo;  Pengfei Xu;  Ying Chai;  Liangbi Li
School of Naval architecture and Ocean Engineering, Jiangsu University of Science and Technology, Zhenjiang, 212100, China
Keywords:
Fatigue crack propagation|Welding residual stress redistribution|Extended finite element method|Mutual influence analysis|Surface crack
分类号:
-
DOI:
10.1007/s11804-025-00626-3
Abstract:
The crack propagation life of welded ship structures is considerably influenced by welding residual stresses, which are redistributed as cracks propagate. Therefore, studying the mutual interaction between welding residual stress redistribution and surface crack propagation is crucial for accurately predicting the crack propagation life of welded structures. This research uses TC4 titanium alloy specimens, applying the extended finite element method to investigate the welding residual stress redistribution during surface crack propagation. The cyclic iteration analysis method is proposed to simultaneously consider the redistribution of welding residual stresses and crack propagation. The results show that 1) the welding residual stresses at the surface crack tip and crack depth initially increase, then decrease with crack propagation, and 2) the predicted fatigue crack propagation life, when welding residual stress is not considered, is 2.01 times longer than the corresponding fatigue crack propagation life using the proposed method, which accounts for welding residual stress. In addition, when the welding residual stress is set to a constant value of 0.3 σy, the fatigue crack propagation life prediction becomes overly conservative, yielding only 0.39 times the fatigue crack propagation life predicted based on the mutual influence of welding residual stress redistribution. The fatigue crack propagation life prediction method proposed in this study, which considers the interaction between welding residual stress redistribution and crack propagation, offers a more reasonable approach. It lays the foundation for accurate prediction of fatigue crack propagation life in welded structures.

References:

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Memo

Memo:
Received date:2025-2-1;Accepted date:2025-3-4。<br>Foundation item:The research reported in this paper is supported by the National Major Project.<br>Corresponding author:Guangen Luo,E-mail:luoge@just.edu.cn
Last Update: 2026-06-08