【作者】 潘鹏志； 冯夏庭； 周辉；

【Author】 Pan Pengzhi, Feng Xiating, Zhou Hui(Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan 430071 )

【机构】 中国科学院武汉岩土力学研究所；

【摘要】 将细胞自动机的自组织理论与弹塑性理论相结合,推导了分析平面塑性问题的细胞自动机更新规则,采用Weibull随机分布模拟岩石类材料的非均质性,元胞单元服从简单的本构关系和一定的强度准则,建立平面弹塑性细胞自动机模型,开发了相应的数值分析软件。利用该模型在细观尺度上模拟脆塑性岩石类材料的单轴压缩破坏过程,给出岩石单轴压缩全程应力-应变曲线和声发射曲线,数值模拟结果与典型实验结果吻合较好。更多还原

【Abstract】 Combined with self-organized theory of cellular automata and elasto - plastic theory, the elasto-plastic cellular automata updating rule is presented. The Weibull stochastic allocation is adopted to simulate the heterogeneity of rocks. Each cell element is assumed to submit simple constitutive relation and certain yield criterion. The plane elasto-plastic cellular automata model is built and the corresponding analytical software is compiled. The fracture process of rocks with brittle-plasticity under uniaxial compression in meso-scope is simulated. The complete stress-strain relation and acoustic emission curve, which are well consistent with the experiment results, are presented.更多还原