5A06铝合金焊接残余应力有限元分析  

Finite Element Analysis of Residual Stress for 5A06 Aluminum Welded Joint

作　　者：米国发[1] 赵大为[1] 董翠粉[1] 牛济泰[1,2] 

机构地区：[1]河南理工大学材料科学与工程学院,河南焦作454003 [2]哈尔滨工业大学现代焊接生产技术国家重点实验室,黑龙江哈尔滨150001

出　　处：《热加工工艺》2010年第3期128-130,共3页Hot Working Technology

基　　金：国家自然科学基金资助项目(90205035)

摘　　要：利用热弹塑性有限元方法对5A06铝合金焊接接头的温度场和残余应力场进行模拟。有限元模型中选用三维实体单元,考虑材料物理性能随温度的变化和周边对流、辐射散热的影响。在模型中运用移动的三维双椭球体热源作为输入热源来模拟焊接过程,最终获得了焊接温度场和残余应力场。将有限元计算结果与残余应力的实测结果进行了对比,模拟结果与实测值有较好的一致性。Temperature and stress field of 5A06 aluminum welded joint was simulated by using thermal-elastoplastic finite element method. The 3-D solid elements were used in FEM model, and the effect of temperature, and the heat convection and radiation of boundary on material properties were considered. The temperature field and residual stress field were obtained by using 3-D double-ellipsoidal heat source model to simulate welded process. The results of prediction and actual measured were compared and the results coincided with each other.

关 键 词：热源模型 残余应力 有限元 热弹塑性 

分 类 号：TG146.21[一般工业技术—材料科学与工程] TG456.2[金属学及工艺—金属材料]