西南交通大学学报 2007, 42(3) 278-282 DOI:     ISSN: 0258-2724 CN: 51-1277/U

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本文关键词相关文章
岩石
损伤
本构模型
参数
本文作者相关文章
许江
李树春
刘延保
李克钢
PubMed
Article by XU Jiang
Article by LI Shuchun
Article by LIU Yanbao
Article by LI Kegang

基于Drucker-Prager准则的岩石损伤本构模型

许江, 李树春, 刘延保, 李克钢

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

摘要

为解决用对数变换再线性拟合的方法求岩石损伤本构方程参数计算过程复杂、不利于计算机编程的问题,引入岩石应力-应变曲线特征参量,并考虑岩石应力-应变曲线的极值条件,给出了模型参数的解析式,从而建立了新的岩石损伤本构模型.通过与砂岩试件三轴压缩试验结果比较,证明所建立的模型可以很好地反映岩石的应力-应变关系.通过对参数m和F0的讨论,认为m和F0分别代表了岩石的脆性和强度,而弹性模量是参数m和F0的共同反映.

关键词 岩石   损伤   本构模型   参数  

Damage Constitutive Model of Rock Based on Drucker-Prager Criterion

XU Jiang, LI Shuchun, LIU Yanbao, LI Kegang

Key Lab.for the Exploitation of Southwestern Resources & the Environmental Disaster Control Eng., Ministry of Education, Chongqing University, Chongqing 400044, China

Abstract:

To overcome the shortcoming of the existing method to establish the damage constitutive model of rock,i.e.,it seeks parameters in the constitutive model by linear fitting after logarithmic transformation to result in a complex calculation and not to fit for computer programming,formulas of calculating the parameters in the constitutive model were given by introducing the characteristic parameters of the stress-strain curve of rock and taking the extreme conditions for the stress-strain curve of rock into consideration.As a result,a new constitutive damage model of rock can be easily established.Comparison with the result of triaxial compression tests shows that this model can reflect well the relationship between stress and strain of rock.Through a discussion on parameters m and F0 in the constitutive damage model,it is believed that m and F0 represent the brittleness and strength of rock respectively,and elastic modulus of rock is a co-reflection of the two parameters.

Keywords: rock   damage   constitutive model   parameter  
收稿日期 2006-07-16 修回日期  网络版发布日期  
DOI:
基金项目:

国家自然科学基金资助项目(50574108);国家自然科学基金重点项目(50534080)

通讯作者:
作者简介: 许江(1960- ),男,教授,博士,博士生导师,研究方向为岩石力学与工程,电话:023-65111236,E-mail:jiangxu@cqu.edu.cn

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