Abstract Redistribution of residual stress during crack growth in butt welded joint of Al5083-H111 was studied. Furthermore, the effect of post weld heat treatment and removing the weld reinforcements on fatigue crack growth rate was investigated. Three dimensional simulations of welding process and fatigue crack growth were conducted. It was shown that removing the weld reinforcements causes an increase in the residual stress. A correlation between the fatigue crack growth rate data of welded joints can be obtained with that of the parent metal by considering the weld geometry and redistribution of residual stresses in calculation of stress intensity factor.

中文翻译：

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残余应力再分布和焊缝钢筋几何形状对对接焊缝疲劳裂纹扩展的影响

摘要 研究了Al5083-H111对接焊缝裂纹扩展过程中残余应力的再分布。此外，还研究了焊后热处理和去除焊缝增强材料对疲劳裂纹扩展速率的影响。进行了焊接过程和疲劳裂纹扩展的三维模拟。结果表明，去除焊缝增强材料会导致残余应力增加。通过在应力强度因子计算中考虑焊缝几何形状和残余应力的重新分布，可以获得焊接接头疲劳裂纹扩展速率数据与母材之间的相关性。