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采用大变形刚粘塑性有限元法模拟超塑性恒压轴对称充模胀形过程、分析了模具几何参数及材料参数对胀形过程中材料的流变行为、胀形制许厚度分布和成形时间的影响规律。给出了质点的流动轨迹、不同时刻制件的剖面形状及应力、应变分布；基于修正的Gurson粘塑性势推导了内部空洞体积分数累积增大模型并据此进行了变形-损伤耦合计算．
The large deformation rigid visco-plastic finite element method was used to simulate the superplastic constant pressure axial symmetric filling and bulging process. The influence of the geometrical parameters of the mold and the material parameters on the rheological behavior, the thickness distribution of the bulging forming and the forming time were analyzed. law. The trajectory of particles, the shape of cross section, the distribution of stress and strain at different time points are given. Based on the modified Gurson visco-plastic potential, the model of cumulative increase of internal void volume fraction is deduced and the deformation-damage coupling calculation is carried out.