摘要
由于蜂窝夹套焊缝受力情况比较复杂,焊接部位经常出现焊缝开裂引起泄漏,焊接残余应力是重要的影响因素之一。运用大型有限元分析软件ABAQUS的热—力耦合功能,对304不锈钢蜂窝夹套的塞焊和填角焊两种焊接方式进行有限元模拟,得到了这两种焊接接头的残余应力分布情况。结果表明,塞焊焊接方式的蜂窝夹套焊缝处的残余应力大于采用填角焊方式的。采用塞焊方式蜂窝孔处的焊接残余应力较高,焊完第二个蜂窝孔后对第一个蜂窝孔的残余应力影响较大。而采用填角焊方式则这种影响较小。对塞焊和填角焊焊缝进行强度计算,结果表明填角焊焊缝的承载能力较好。研究结果为蜂窝夹套进行分析设计和控制焊缝开裂提供了理论基础。
Due to the complexity of loading case in dimple jacket weld,the problem of leakage is always happened in weld,which is induced by cracks in weld.Welding residual stress is one of the main affected factors.By the finite element analysis code ABAQUS and the function of coupling process between heat and stress,the methods of plug welding and fillet welding were simulated for 304 stainless steel dimple jacket and the distribution of welding residual stress was obtained.The results indicated that the residual stress of plug welding was higher than the residual stress of fillet welding in weld.The much higher residual stress was produced by plug welding in the hole of dimple jacket,and the residual stress of first dimple jacket hole was affected greatly after the second hole had been welded.But the affection was little when the method of fillet welding was applied.Intensity calculation for plug welding and fillet welding was carried out,and the results shown that loading bearing capacity of fillet welding is better.The research results provided theory base for the analysis design and controlling welding cracks of dimple jacket.
出处
《焊接学报》
EI
CAS
CSCD
北大核心
2007年第12期81-84,共4页
Transactions of The China Welding Institution
关键词
蜂窝夹套
填角焊
塞焊
焊接残余应力
有限元分析
dimple jacket
fillet welding
plug welding
welding residual stress
finite element analysis
