各向异性岩石流变损伤力学特性实验与本构模型研究

项目名称： 各向异性岩石流变损伤力学特性实验与本构模型研究

项目编号： No.51479049

项目类型： 面上项目

立项/批准年度： 2015

项目学科： 水利工程

项目作者： 徐卫亚

作者单位： 河海大学

项目金额： 84万元

中文摘要： 应用岩石全自动三轴流变力学实验系统，开展各向异性岩石三轴流变力学特性试验，研究不同围压和应力加载路径下的各向异性岩石三轴流变力学特性，分析各向异性程度、应力路径对各向异性岩石长期流变的影响规律；研究不同围压和应力路径下的各向异性岩石流变损伤破坏模式随时间演化规律，揭示各向异性岩石流变-损伤-破坏的时效演化机制；研究各向异性岩石流变长期强度准则，建立反映各向异性的岩石非线性弹塑性损伤特性和流变损伤特性的非线性黏弹塑性流变损伤本构模型。研究成果将有助于深化各向异性岩石流变力学与流变损伤力学理论的发展，有助于岩石工程长期稳定性与安全性的工程实践应用。

中文关键词： 岩石力学；各向异性；流变力学实验；流变损伤；本构模型

英文摘要： Rheological tests are conducted on an anisotropic rock within a rock automatic rheological triaxial test system. Rheological characteristics of the anisotropic rock under various confining pressures and stress-loading paths are studied. The effects of anisotropic degree and stress-loading paths on long-term rheological strain curves of the anisotropic rock are analyzed. The time-dependent evolutionary law about rheological damage and failure modes are investigated to express the mechanisms of rheology-damage-failure of anisotropic rock. The long-term strength criterion for anisotropic rocks are proposed. A nonlinear elasto-plastic damage model and a rheological damage nonlinear visco-elasto-plastic model for anisotropic rocks are developed. This research not only take benefit to the developments of rheology and damage theory in rock mechanics, but also significantly useful to solve the problems about long-term stabilities and safety in important rock engineering.

英文关键词： rock mechanics;anisotropic rock;rheological mechanics test;rheological damage;constitutive model