应变测量的小程序，很有用的哟 可以当做子程序也可以直接使用-Strain measurement of small procedures, very useful yo can also be used directly as a subroutine

HYPLAS 2.0:固体超弹性和弹塑性隐式大应变和小应变有限元分析程序,本程序是<<塑性力学计算方法:理论与应用>>的附件.(Program for implicit small and large strain finite element analysis of hyperelastic and elastoplastic solids.)