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基于弹脆塑性理论和细胞自动机自组织理论相结合来模拟岩石试样的应变软化行为,对岩样单轴压缩破坏过程中产生I类和II类曲线的机制进行模拟分析,利用应力-应变线性组合的控制加载方式,分别考虑不同的均质度和不同的加载控制参数的情况,并模拟非均质岩石单轴压缩破坏过程的I类和II类曲线。研究结果表明,当采用应力-应变线性组合的控制加载方式时,I类和II类曲线的出现与岩石试样的均质度和加载控制参数有很大的关系,均质度越大,岩石脆性越强,峰后越趋向于形成II类曲线;同一种岩石试样,采用不同的线性组合参数,岩样既可以表现为I类行为,也可表现为II类行为。
The strain softening behavior of rock samples was simulated based on the brittleness-plasticity theory and cellular automata self-organization theory. The mechanism of type I and type II curves during the uniaxial compression failure of rock samples was simulated and analyzed. The stress- The linear combination of control loading method, considering different homogeneity and different loading control parameters respectively, and simulating the type I and type II curves of the uniaxial compression failure process of inhomogeneous rocks. The results show that the appearance of Type I and Type II curves has a great relationship with the homogeneity and loading control parameters of rock samples when the stress-strain linear combination control loading mode is adopted. The greater the homogeneity, the higher the rock The stronger the brittleness, the more the post-peak shape tends to form a type II curve. For the same rock sample, different linear combination parameters are used, and the rock sample can behave as type I and type II, respectively.