异种金属搅拌摩擦焊接应力应变场有限元分析  

Stress-Strain Field Finite Element Analysis of Heterogenous Metals Friction Stir Welding(FSW)

作　　者：刘小文[1] 李捷[1] 薛敬凯[1] 

机构地区：[1]西北工业大学材料学院,西安710072

出　　处：《机械科学与技术》2009年第11期1530-1534,1540,共6页Mechanical Science and Technology for Aerospace Engineering

基　　金：国家自然科学基金项目(50275123)资助

摘　　要：在FSW产热过程理论分析的基础上,根据搅拌头外形尺寸,建立了FSW三维传热有限元模型。利用有限元分析软件ANSYS,结合几个测温点温度变化的实验数据,通过间接热力耦合分析法对紫铜板与黄铜板FSW过程进行了模拟。分析结果表明:3 mm厚T2与H62的FSW其焊接热源为线热源,在模拟计算时可进一步将模型简化为二维平面模型;焊接的中间时段,搅拌头周围温度分布基本上达到稳定状态;等效应力与等效应变的变化与温度的变化趋势相同,厚度方向不同位置的应力应变变化接近一致。According to the physical dimension of the tool, a 3D finite element heat-transfer model of FSW was built on the basis of theoretical analysis of heat-transfer. With the finite element analysis software ANSYS and limited measured temperature data, red copper and brass FSW process thermal-structural coupled analysis was done. The results show that the heat source of 3 mm thick T2 and H62 sheetmetal FSW is the line heat source. The analogy model can be further simplified as 2D planar model. The temperature distribution around the tool reaches steady state in the intermediate stage of the welding. The variation tendency of equivalent stress and equivalent strain conforms with that of the temperature. On thickness direction, variations of stress and strain in different positions are consistent.

关 键 词：应力应变场 搅拌摩擦焊 有限元分析 

分 类 号：TG404[金属学及工艺—焊接]