三维hashin失效判据子程序 用于判断三维建模情况下的符合材料失效分析(Three-dimensional hashin failure criterion subroutine for determining material failure analysis in the case of 3D modeling)

利用Fortran对Abaqus进行二次开发，包括UMAT、VUMAT和UEL的编写方法和简单案例。(Use Fortran for secondary development of Abaqus)