动态荷载作用下岩石变形破坏过程模拟方法研究  

Research on Simulation Method of Rock Deformation Failure Process under Dynamic Load

作　　者：罗佳湘 张超 LUO Jiaxiang;ZHANG Chao(School of Civil Engineering,Hunan University of Science and Technology,Xiangtan 411201,Hunan,China)

机构地区：[1]湖南科技大学土木工程学院,湖南湘潭411201

出　　处：《工程技术研究》2024年第18期1-4,共4页Engineering and Technological Research

摘　　要：岩石动态变形过程受围压与应变率影响显著。文章首先分析中高应变率、应力水平与岩石动态力学特征之间的关联性,提出岩石微元体模型,分别以损伤弹性体与黏性体反映静态应力分量和动态惯性应力分量。然后基于统计损伤理论和黏性体的力学特征确定损伤弹性体与黏性体的应力-应变分量关系,得到动态组合统计损伤本构模型。最后得出结论:该模型可反映中高应变率对岩石变形的影响,具有一定的优越性。The dynamic deformation process of rock is significantly affected by confining pressure and strain rate.This paper first analyzes the correlation among medium and high strain rate,stress level,dynamic mechanical characteristics of rock,and puts forward a rock micro-element model,which reflects the static stress component and the dynamic inertial stress component by the damaged elastomer and the viscous body respectively.Then,based on the statistical damage theory and the mechanical characteristics of the viscous body,the stress-strain component relationship between the damaged elastomer and the viscous body is determined,and the dynamic combined statistical damage constitutive model is obtained.Finally,it is concluded that the model can refl ect the influence of medium and high strain rates on rock deformation,and has certain advantages.

关 键 词：围压效应 应变率 动态应力 黏性元件 动态变形破坏 

分 类 号：TU45[建筑科学—岩土工程]