说明：  利用Fortran语音对abaqus进行二次开发，模拟各项同性材料的非线性强化，可以在后面加损伤模拟各项同性材料的全过程
(Using Fortran voice for secondary development of abaqus, simulating the nonlinear strengthening of various isotropic materials can be added damage to simulate the entire process of various isotropic materials)