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根据单轴受力特性曲线唯象地考察岩石材料损伤演化,定义弹性应变表示的一维损伤变量及其本构模型,利用双剪强度理论将其推广至三维模型.塑性是潜在破坏面的摩擦滑移,在传统塑性理论的框架中,建立了基于摩尔-库仑强度理论与潜在滑移面摩擦软-硬化特性的各向异性损伤弹塑性本构关系.结果表明,计算的损伤演化与CT观测结果符合很好,用本文的弹塑性模型反映损伤材料的力学特性是可行的.
According to the uniaxial stress characteristics curve, the damage evolution of rock material is investigated phenomenologically, the one-dimensional damage variable and its constitutive model of elastic strain are defined, and the two-shear strength theory is used to extend it to three-dimensional model. Plasticity is the potential failure surface friction In the framework of the traditional plastic theory, an elasto-plastic constitutive model of anisotropic damage based on the Mohr-Coulomb strength theory and the potential friction-softening behavior of the sliding surface is established. The results show that the calculated damage evolution and CT observation The result is in good agreement. It is feasible to use the elasto-plastic model of this paper to reflect the mechanical properties of the damaged material.