岩石流变损伤本构方程.pdf

第27卷增刊 2006年10月岩土力学 Rock and SoilMechanics Supp. 文章缩号I 1000--7598--(2006)增刊一0046—05 岩石流变损伤本构方程万玲1,一,彭向和1,一,杨春和3,任中俊1 (,重庆400044:,重庆400044; ,武汉430071) 摘要·根据岩石材料的微结构机理,基于简单机械模型,通过在不可逆应变和牛顿时间所构成的空间中合理的定义广义时间、引入四阶各向异性损伤张量,建立了岩石的流变损伤本构方程。该模型能够考虑复杂应力状态下材料的响应特性,各向异性损伤及其损伤的方向特征,静水压力的影响等。发展了相应的数值分析方法,并根据泥岩三轴蠕变试验结果进行了验证。关键词:岩石;流变;损伤;本构方程中图分类号l TU452 文献标识码:A Arheology damage constitutive equation ofrocks WAN Ling l,2 PENG Xiang—he,1一,YANG Chun—he3,REN Zhong-junl Resources and Environmental Science,Chongqing University,Chongqing伽0044,China; Exploitation Southwest Resources&Environmental Control Engineering。Ministry Education。Cbongqing Chongqing Rock and Mechanics,Chine∞Academy Sciences,Wuhan 430071,China) Abstract,Based on themicrostructure—mechanisms ofrock materials and asimple mechanical model,a rheology damage constitutive equation proposed by introducing generalized time defined the space ofirreversible strain and Newtonian time,and an anisotropic damage tensor ofrank anisotropic evolution and unilateral effectofdamage as well as theeffectofhydrostatic pressure can betaken into account theproposed corresponding numerical analysis developed;and thecreep,inelastic anddamage behaviors ofclaystone are shows thatthecalculated resultsagree wellwith theexperimental observation. Th