本文通过对热弹塑性理论本构关系的研究,用虚功原理建立了有限元方程,并研制了相应的平面问题程序,程序中考虑了材料的物理、力学常数对温度的依赖性,采用了过渡元素平均加权修正技术、屈服面修正技术和不平衡修正技术。最后计算了一个简单焊接模型,得出了满意的结果。 Based on the study of the constitutive relation of thermo-elasto-plastic theory, the finite element equation is established by the principle of virtual work, and the corresponding program of plane problem is developed. The dependence of material physical and mechanical constants on temperature is taken into account in the program. Transitional Element Average Weighted Correction Technique, Yield Surface Correction Technique, and Imbalance Correction Techniques. Finally, a simple welding model is calculated and the result is satisfactory.