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焊接过程的数值模拟是焊接技术从“技艺”走向“科学”的重要标志之一。利用热弹塑性理论建立了焊接过程动态位移场的本构方程 ,并根据高温区的特点建立了包含材料非线性、变化环境参数等因素在内的位移场有限元分析模型 ;利用ANSYS实现了基于间接耦合的热 -力学场的计算 ,利用激光电子散斑干涉测量技术测得的实际位移场与有限元计算结果进行了比较 ,证明计算结果与实测结果吻合良好
The numerical simulation of welding process is one of the important symbols of welding technology from “art” to “science”. The constitutive equation of the dynamic displacement field of the welding process is established by using thermo-elasto-plastic theory. According to the characteristics of the high temperature zone, the finite element analysis model of the displacement field including material nonlinearity and varying environmental parameters is established. By using ANSYS, The indirect coupled thermal-mechanical field calculation, the actual displacement field measured by laser speckle speckle interferometry and the finite element calculation results are compared, and the calculated results are in good agreement with the measured results