铝合金平板钨极氩弧焊数值模拟与残余应力预测  

Simulation on TIG Welding of Aluminum Alloy Plate and Residual Stress Predicting

作　　者：金成[1] 牛济泰[1] 何世禹[1] 陈永[2] 

机构地区：[1]哈尔滨工业大学材料科学与工程学院,黑龙江哈尔滨150001 [2]郑州大学材料科学与工程学院,河南郑州450001

出　　处：《机械工程材料》2007年第3期58-59,62,共3页Materials For Mechanical Engineering

基　　金：国家自然科学基金(90205035)

摘　　要：利用ABAQUS有限元软件对铝合金平板钨极氩弧焊(TIG)焊接过程进行了数值模拟。首先应用移动的椭圆高斯分布表面热源作为输入热源,对TIG焊过程中的焊件温度场及应力场进行了模拟计算。高度不均匀的焊接温度场,导致构件中产生较大的残余应力与变形。最后,对冷却后的平板残余应力进行了预测,并将有限元计算结果与残余应力的实测结果进行了对比,两者吻合很好。The simulation of aluminum alloy plate tungsten inert gas welding （TIG） process using finite element software-ABAQUS was researched. Firstly, the welding temperature field was calculated using elliptical surface Gaussian distributions as the input heat source. The highly non-uniform welding temperature file caused large residual stress and deformation in the welding plate. The welding residual stress of the welded plate was predicted after it cooled down. The results of prediction and actual measured were contrasted finally. Results are verified the applicability of the welding simulation.

关 键 词：铝合金 TIG焊 残余应力 有限元 

分 类 号：TG404[金属学及工艺—焊接]