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Using the Pietruszczak-Mroz anisotropic failure criterion to model the strength of stratified rocks
International Journal of Rock Mechanics and Mining Sciences ( IF 3.780 ) Pub Date : 2020-04-04 , DOI: 10.1016/j.ijrmms.2020.104312
Jiu-Chang Zhang; Su-Hua Zhou; Zhi-Nan Lin; Chun-Xiu Han

The strength of stratified rocks is closely related to their inherent structural anisotropy, which cannot be accurately represented by the isotropic failure criteria. In this study, the Pietruszczak-Mroz (PM) anisotropic failure criterion was used to describe the directional dependency of strength of stratified rocks. In the meridian plane, the frictional coefficient was established by incorporating an anisotropic variable defined as a joint invariant of fabric and stress tensors. In the deviatoric plane, the anisotropic failure surface was characterized by a smooth shape function of Lode's angle. The material parameters for the failure criterion can be determined using the triaxial test. The PM anisotropic criterion was utilized to predict the anisotropic strength of specific stratified rocks. Analysis of the experimental data validated the assertion that PM anisotropic criterion has excellent ability to model the anisotropic strength features of stratified rocks.
更新日期:2020-04-21

 

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