运用ANSYS对焊缝残余应力及温度场分析

The Analysis of the Temperature Environment and the Welding Line'S Remaining Stress Based on ANSYS

在焊接过程中,高温移动热源及之后的快速冷却,使得在焊缝及其附近区域产生了残留的拉应力,由此产生热应力场和残余应力。为预测焊接变形,采用有限元软件ANSYS中生死单元技术和热-结构耦合技术对异种材料钢铜连接处的铝焊缝进行数值分析,得出焊缝焊接残余应力、温度场分布情况,进而为制定正确的焊接工艺、改善焊缝性能等实际生产和使用提供理论依据。

In the welding process,moving high temperature and subsequent rapid cooling cause residual tensile stress at the weld and adjacent fields,hence generate thermal stress and residual stress.In order to predict welding deformation,adopting birth-dead and hot-structural coupling skills of the finite element soft ware ANSYS to simulate welding process of dissimilar materials steel-copper,the distribution of weld residual stress and temperature field can be grasp.These provide theory basis for formulating correct welding process and improving weld performance.