岩石试样弹塑性破裂过程数值模拟比较研究

Comparative study on elastic-plastic failure process of rock specimen by means of numerical simulation

应用岩石弹塑性破裂过程分析软件(REPFPA),对岩石试样的弹塑性破裂过程进行了一系列的数值模拟比较研究。分别研究随机数发生器种子值、统计分布函数的形态参数m、单元数目、应力应变状态、试样中心有无弱区、边界条件、材料参数随机赋值方式等条件对岩石试样弹塑性破裂过程的影响。不仅在计算机上再现了岩石试样的弹塑性破裂过程,而且得出许多有意义的结论。这些问题的解决对于用数值模拟方法研究岩体工程的宏观力学性能是很有意义的工作。

Applying the software of Rock Elastic-Plastic Failure Process Analyzing - REPFPA, a series of comparison studies are made on the elastic-plastic failure process of rock specimen by means of numerical simulation. Influences of the conditions, such as seed value of randomizer, the form parameter of statistical distributing function m, cell number, stress strain state, if there are weak areas in the center of specimens, limit conditions, random evaluating method of material factor on the elastic-plastic failure process of rock specimen are discussed. Not only reproduction of the elastic-plastic failure of rock specimen is made in the computer but also many constructive conclusions are drawn. The solution to these problems is significant for the study on the macro-mechanical property of rock-masses by adopting the method of numerical simulation.