铝合金联装架焊接残余应力和变形数值模拟  

Numerical Simulation of Welding Residual Stress and Deformation in Aluminum Alloy Connection Framework

作　　者：廖传清 高艳芳 杨江 吴晟 王沁 王杰 朱亮亮 董红刚[2] LIAO Chuanqing;GAO Yanfang;YANG Jiang;WU Sheng;WANG Qin;WANG Jie;ZHU Liangliang;DONG Honggang(Shanghai Aerospace Equipments Manufacturer Co.,Ltd.,Shanghai 200245,China;School of Materials Science and Engineering,Dalian University of Technology,Dalian 116024,Liaoning,China)

机构地区：[1]上海航天设备制造总厂有限公司,上海200245 [2]大连理工大学材料科学与工程学院,辽宁大连116024

出　　处：《上海航天（中英文）》2020年第3期140-146,共7页Aerospace Shanghai（Chinese&English）

基　　金：国防基础科研计划资助项目(JCKY2017203B066)。

摘　　要：基于SYSWELD有限元分析软件,以某新型战术型号铝合金联装架为产品对象,选取支撑框配对组件、弹位组件和立方体组件为典型结构件进行焊接残余应力和变形数值模拟,以期表征铝合金联装架焊接过程的残余应力分布和变形趋势。结果表明:焊缝及其附近热影响区的Von-Mises应力较高,甚至超过了5A06铝合金材料的常温屈服强度;支撑框组件焊后最大变形出现于长矩形管中央,约为6.44 mm;弹位组件的焊接变形整体表现为凹向三维结构内腔,焊接变形也多集中在长矩形管上,最大变形约为5.21 mm。另外,采用对称分散焊过程产生的焊接变形量小于逐条焊缝焊接过程,但焊接残余应力趋势则相反。Based on the SYSWELD finite element analysis software,the welding residual stress and deformation of the typical structural components in a new type of aluminum alloy connection framework,i.e.,the supporting frame component,the missile position component,and the cube component,are numerically simulated.The results show that the Von-Mises stress in the weld and heat-affected zone is higher than the Von-Mises stress in the other region,and it is even exceeds the normal temperature yield strength of 5A06 aluminum alloy.The maximum deformation of the welded supporting frame component appears in the center of the long rectangular tube,and is about 6.44 mm.The overall welding deformation of the missile position component is shown as a concave 3D inner cavity,the welding deformation is mainly concentrated in the long rectangular tube,and the maximum deformation is about 5.21 mm.Besides,the welding deformation produced by the symmetrically dispersed welding process is lower than that produced by the process welding one by one,while the trend of the welding residual stress is opposite.

关 键 词：铝合金 焊接变形 联装架 SYSWELD 焊接残余应力 

分 类 号：TG422[金属学及工艺—焊接]