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将离散Ｋｉｒｃｈｈｏｆ理论（ＤＫＴ）平板弯曲单元和薄膜单元的组合模型引入到弹塑性有限变形的虚功率增率型原理中。采用Ｈｉｌ（１９７９）厚向各向异性屈服函数，模拟了韧性金属板材液压胀形过程的分叉失稳以及后继变形局部化的演化过程。与实验结果比较表明所建立的薄板成形有限元模型是有效的
The combined model of discrete Kirchhof theory (DKT) plate bending and thin-film elements is introduced into the virtual power-increasing principle of elastic-plastic finite deformation. The anisotropic yield function of Hil (1979) is used to simulate the bifurcation instability and subsequent deformation localization of the ductile sheet metal under hydraulic bulging. Compared with the experimental results show that the established finite element model of sheet metal forming is effective