镁合金 AZ31D 热粘塑性模型的参数识别

摘要

通过联合实数编码遗传算法和一些经典的局部优化方法，构造了一种混合型的全局优化方法并用于开发一个专用的参数识别程序。使用这个专用程序进行了镁合金 AZ31D 的参数识别。变形试验和数值模拟结果的比较显示，本参数识别方法及其所得到的材料参数都是可用的。所得到的本构参数可用于镁合金零件热塑性成形的数值模拟。%A hybrid global optimization method combining the Real -coded genetic algorithm and some classical local optimization methods is constructed and applied to develop a special program for pa-rameter identification. The parameter identification for magnesium alloy AZ31D is carried out by using the program. A comparison of deformation test and numerical simulation shows that the parameter identi-fication and the obtained material parameters are all available. The obtained constitutive parameters can be used for numerical simulation of hot plastic forming of the magnesium alloy parts.