abaqus的vumat子程序，neo-hookean超弹性子程序-neo-hookean subroutine for vumat of abaqus

abaqus 超弹分析（umat）子程序(ABAQUS hyperelastic analysis (UMAT) subroutine)

实现Cu基材料的本构关系的回滞模型，可用于超弹性材料的子程序，但对于残余应变的实现不足(A hysteresis model for realizing the constitutive relationship of Cu-based materials can be used for subroutines of superelastic materials, but the implementation of residual strain is insufficient.)