摘要
在Mohr-Coulomb准则及岩石微元强度服从对数正态随机分布的基础上,结合岩石三轴应力应变试验曲线,建立了能反应岩石破裂全过程的三维损伤本构模型.在此基础上重点研究了对数正态分布参数对岩石损伤统计本构模型的影响,从而寻找出分布参数与围压σ3的关系.研究结果表明该模型形式简单、参数容易获得、与试验数据符合程度较好.依据该模型理论,在VC++开发环境中为FLAC3D开发出数值计算所需的本构模型动态链接库,然后采用该本构模型进行数值计算,将数值计算结果与理论结果和试验结果进行对比,结果表明开发的本构模型具有一定的合理性,为同类工程应用奠定了基础.
The paper establishes the three-dimensional constitutive model which expresses the rock failure process based on Mohr- Coulomb criterion, rock microunit strength conforming to logarithmic normal disturbance, and the three axis stress strain curve of rock. On the basis of this, the paper focuses on the logarithmic normal disturbance parameters influence on constitutive model of rock damage. It finds out that the relationship between the distribution parameters and the confining pressure. Results show that the model has a simple form. Its parameters are easily obtained, and the degree is in a good agreement with the experimental data. The paper develops the constitutive model dynamic link library for FLAC3D in VC＋＋, calculated with the model. Comparing with theoretical and tests results, it shows that the constitutive model has certain rationality and can use for similar engineerings.
出处
《矿业工程研究》
2017年第1期7-13,共7页
Mineral Engineering Research
