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.
出处
《材料工程》
EI
CAS
CSCD
北大核心
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)
关键词
7022铝合金
残余应力
变形
热力耦合
7022 aluminum alloy
FSJ
residual stress
deformation
thermal-mechanical coupling
作者简介
通讯作者：左敦稳（1962-），男，教授，博导，研究方向：FSJ连接技术、高速铣削、金刚石涂层等，联系地址：南京航空航天大学机电学院（210016），E-mail：imit505@nuaa．edu．cn
