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在研究岩石变形破坏时,现在采取的弹塑性分析,多是根据岩石在不同的应力状态下的典型破坏现象,提出强度理论(破坏准则),进而在导出岩石的本构关系基础上进行分析计算的。一般说来,岩石在不同应力状态下,基本破坏形式可分下面三类:(1)脆性拉伸破坏,(2)剪切破坏,(3)塑性流动破坏。 这三种破坏类型,基本上可以归结为流动和断裂(拉断和剪断)两种破坏形式。与此
In the study of rock deformation and failure, the present elasto-plastic analysis is mostly based on the typical failure phenomenon of rock under different stress conditions. The strength theory (failure criterion) is proposed, and then the analysis and calculation of the rock constitutive relationship of. In general, the rock under different stress conditions, the basic form of damage can be divided into the following three categories: (1) brittle tensile damage, (2) shear failure, (3) plastic flow failure. These three types of damage can basically be attributed to flow and fracture (pull off and shear) two forms of damage. With this