基于ABAQUS二次开发的岩石力学试验数值仿真系统

岩石力学试验是研究岩石力学特性,获取力学参数的重要途径。为研究不同荷载作用下不同尺寸试块的破坏过程,利用Python语言对ABAQUS软件进行二次开发,建立岩石力学试验过程的参数化数值模拟仿真系统。将考虑剪切效应的Drucker-Prager破坏准则编入vusdfld子程序中,引入失效单元删除算法研究荷载作用下岩石试块变形破坏过程,实现了岩石力学试验过程的数值仿真。以花岗岩试块三轴压缩试验为例,验证了仿真系统的有效性。该系统可根据用户需要与实验室加载平台进行数据匹配,极大提高了建模和分析效率,同时丰富了力学试验内容。

Numerical simulation system for rock mechanics test based on ABAQUS secondary development

Rock mechanics test is an important way to study rock mechanics properties and obtain mechanical parameters. In order to research the damage process of rock specimens with various sizes under different load levels, the Python language is used to make secondary development for ABAQUS and the parameterized numerical simulation system for rock mechanics test is established. The Drucker-Prager failure criterion considering shear effect is programmed into VUSDFLD subroutine and the failure element deletion algorithm is introduced to study the deformation and damage process of rock specimens. Then the triaxial compression test of granite block is taken as an example to verify the validity of the simulation system. The system can match with the laboratory loading platform according to the users'' need, improve the efficiency of modeling and analysis, and enrich the content of mechanics test.