A Statistical Damage Constitutive Model of Anisotropic Rock: Development and Validation

The damage constitutive model is of great significance to research the stress-strain relationship and evolution rock under loading in engineering. In order investigate effect anisotropic characteristic on evolution, a statistical true triaxial condition was developed. this study, plane which existed perpendicular coordinate axis extracted from representative volume element (RVE) rock. assumed be composed abundant mesoscopic elements whose failure strength satisfied Weibull distribution. According number each direction loading, variable established based proposed concept areal damage. A developed by using strain equivalent hypothesis generalized Hooke model. Subsequently, parameters were determined method total differential. Thus, various stress conditions can conveniently evaluated validated tests rocks conventional triaxial, respectively. Moreover, for purpose studying influence model, sensitivity analyses mechanical carried out. results clearly demonstrate conditions.