【摘要】 结合界面元方法的特点,在交界面上考虑相邻块体的材料和变形特征,不需增加任何形式的夹层单元,即可有效模拟块体的不连续变形。并导出了各向同性材料的界面应力公式以及非线性本构关系,根据摩尔-库仑屈服准则建立了弹塑性迭代的数值计算方法,并以此为基础,编制相应的计算程序。利用数值算例与理论值结果的对比分析,验证了界面元方法具有原理简单、可模拟不连续面及应力精度高等优势。更多还原

【Abstract】 Materials and deformation characteristics are considered between two adjacent elements based on three-dimensional (3-D) interface stress element (ISE). Noncontinuous deformation of blocks can be simulated efficiently without any special fault element. Interface stress formulae of isotropic materials and nonlinear constitutive relations are given, and numerical calculation methods of elasto-plastic iteration are established comply with Mohr-Coulomb yield criterion. Corresponding programs are developed. Solutions of failure simulation analysis of numerical models are compared with theoretical results, and advantages of ISE are proved in simple principles, easy simulation of noncontinuous blocks and high calculation precision.更多还原