一种统计损伤本构模型的UMAT开发

he commercial FEM software ABAQUS has both powerful capacity for numerically solving varied large-scale nonlinear problems in engineering practice and user-friendly possibility for extending material libraries to consider the given constitutive model of a specific material. Statistical damage constitutive model assumes that the intensity of the various cell obey the law of statistical distribution, the model that the rock damage is well received within the random distribution of defects in the rock dominance, but also by the rock internal stress - strain state influence.In this paper, A statistical damage constitutive model is numerically implemented by virtue of the interface of UMAT. Then the uniaxial compression test is simulated by using the ABAQUS with the extended UMAT