7022铝合金FSJ拼连板材残余应力和变形分析  

Residual Stress and Deformation of Jointed 7022 Aluminum Alloy by FSJ

作　　者：汪洪峰[1,2] 左敦稳[1] 戴晟[1] 潘玲 

机构地区：[1]南京航空航天大学机电学院,南京210016 [2]黄山学院机电与信息工程学院,安徽黄山245041

出　　处：《材料工程》2014年第7期79-84,共6页Journal of Materials Engineering

基　　金：国家自然科学基金资助项目((51175255;51305199);安徽省高校优秀青年人才基金重点项目(2013SQRL089ZD);江苏省博士后基金(1201007C)

摘　　要：利用有限元方法对7022铝合金板材FSJ连接过程进行模拟,分别获得连接区的残余应力和变形规律,并通过实验验证模拟结果的正确性。通过模拟得出残余拉应力主要集中在连接区,连接区中间位置处在最大拉应力区,连接区两端和其他部位均是残余压应力;垂直于连接区方向上前进侧的变形也大于返回侧的变形,平行于连接区方向钥匙眼端比起始端翘起得高,整个变形如马鞍形状。FSJ process of 7022 aluminum alloy was simulated by the finite element method. The resid-ual stress and deformation laws were obtained by the simulation. The simulation results were verifiedcorrectly by the experiments. The simulation shows that the residual stress is mainly concentrated inthe jointing region. The maximum tensile stress is located in the middle of jointing region. The resid-ual compressive stress is located in the ends and other parts of jointing region. The deformation in theadvancing side in the direction of vertical the jointing region is greater than that in the retreating side.The tilting in the key eye side is higher than that in the staring side. The whole deformation is such asthe saddle shape.

关 键 词：7022铝合金 残余应力 变形 热力耦合 

分 类 号：TG404[金属学及工艺—焊接]