| 岩石流变损伤本构方程 |
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| 引用本文： | 万 玲,彭向和,杨春和,任中俊.岩石流变损伤本构方程[J].岩土力学,2006,27(Z1):46-50. |
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| 作者姓名： | 万 玲 彭向和 杨春和 任中俊 |
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| 作者单位： | 1. 重庆大学 资源及环境科学学院，重庆 400044；2. 重庆大学 西南资源开发及环境灾害控制工程教育部重点实验室，重庆 400044；
3. 中国科学院武汉岩土力学研究所，武汉 430071 |
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| 基金项目： | 重庆市科委应用基础研究项目（No.7943）及重庆市自然科学基金项目（No.CSTC, 2004BB0060）资助. |
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| 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。
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| 关 键 词： | 岩石 流变 损伤 本构方程 |
| 收稿时间： | 2006-05-22 |
A rheology damage constitutive equation of rocks |
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| WAN Ling,PENG Xiang-he,YANG Chun-he,REN Zhong-jun.A rheology damage constitutive equation of rocks[J].Rock and Soil Mechanics,2006,27(Z1):46-50. |
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| Authors: | WAN Ling PENG Xiang-he YANG Chun-he REN Zhong-jun |
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| Institution: | 1. College of Resources and Environmental Science, Chongqing University, Chongqing 400044, China;
2. Key Lab. for the Exploitation of Southwest Resources & Environmental Disaster Control Engineering, Ministry of Education, Chongqing University, Chongqing 400044, China; 3. Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan 430071, China |
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| Abstract: | Based on the microstructure-mechanisms of rock materials and a simple mechanical model, a rheology damage constitutive equation is proposed by introducing generalized time defined in the space of irreversible strain and Newtonian time, and an anisotropic damage tensor of rank four. The anisotropic evolution and unilateral effect of damage as well as the effect of hydrostatic pressure can be taken into account in the proposed model. The corresponding numerical analysis is developed; and the creep, inelastic and damage behaviors of claystone are analyzed. It shows that the calculated results agree well with the experimental observation. The influence of stress level on the creep can be well described with the model. |
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| Keywords: | rock rheology damage constitutive equation |
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