Fatigue Life of 7005 Aluminum Alloy Cruciform Joint Considering Welding Residual Stress

被引：12
|
作者：
Ma, Jianxiao [1 ,2 ]
Wang, Ping [1 ,3 ]
Fang, Hongyuan [2 ]
机构：
[1] China Nucl Power Engn Co Ltd, State Key Lab Nucl Power Safety Monitoring Techno, Shenzhen 518172, Peoples R China
[2] Harbin Inst Technol, State Key Lab Adv Welding & Joining, Harbin 150001, Peoples R China
[3] Harbin Inst Technol, Sch Ocean Engn, Weihai 264209, Peoples R China
来源：
MATERIALS | 2021年 / 14卷 / 05期
关键词：
total fatigue life; cruciform join; welding residual stress; stress intensity factor; stress concentration;
D O I：
10.3390/ma14051253
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
An evaluation method is proposed for determining the full fatigue life of aluminum alloy cruciform joint, including the crack initiation and propagation with welding residual stress. The results of simulations have shown that the boundary between the initiation and propagation stage is not constant, but a variable value. The residual stress leads to a significant reduction in both stages, which is more severe on initiation. With considering residual stress, the ratio of crack initiation to total life is below 7%. The effect of residual stress varies with external loading; when external load is lower, the residual stress has a greater effect.
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页码：1 / 20
页数：20
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