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用屈服函数和势能函数的偏导数重新定义了岩石的局部化变形带的判定条件,给出了新的局部化变形条件及临界模量.通过对Rudnicki和Rice(1975)为研究剪切带发生条件而建立的本构关系加以改进并放宽限定条件,提出了用四分之一椭圆帽盖模型以及与之相切的圆来简化势能函数,获得了简化模型,并在此简化模型基础上,取得了变形带发生的判定条件以及简化后的临界模量.同时还给出了简化理论模型的结果;通过压缩带和剪切带的产生顺序以及判定条件验证了简化模型的正确性,并与Issen等(2001)的理论模型进行了对比,讨论了简化模型的优越性以及在三轴对称压缩试验中的实用性.
By using the partial derivative of the yield function and the potential energy function, the conditions for determining the localized deformation zone of the rock are redefined, and the new localized deformation conditions and critical moduli are given. By studying the shear banding by Rudnicki and Rice (1975) Conditions and the constitutive relations established to be relaxed and relaxed, proposed a quarter-elliptical cap model and the tangent of the circle to simplify the potential energy function, obtained a simplified model, and based on this simplified model, The conditions for the determination of the deformation zone and the simplified critical mass are obtained, and the results of the simplified theoretical model are also given. The correctness of the simplified model is verified by the order of occurrence of the compression zone and the shear zone and the determination conditions. Issen et al. (2001) compared theoretical models to discuss the superiority of simplified models and their applicability in triaxial symmetric compression tests.