Numerical simulation of triaxial compression test for brittle rock sample using a modified constitutive law considering degradation and dilation behavior

查看全文 作　　者：[1,2]谭鑫;KONIETZKY [2]H;FRüHWIRT [2]T

机构地区：[1]College of Civil Engineering, Hunan University;[2]Geotechnical Institute, TU Bergakademie Freiberg

出　　处：《Journal of Central South University》索引2015年第22卷第8期,共11页

基　　金：Project(2015M570678)supported by China Postdoctoral Science Foundation funded project 摘　　要：The understanding of the rock deformation and failure process and the development of appropriate constitutive models are the basis for solving problems in rock engineering. In order to investigate progressive failure behavior in brittle rocks, a modified constitutive model was developed which follows the principles of the continuum damage mechanics method. It incorporates non-linear Hoek-Brown failure criterion, confining pressure-dependent strength degradation and volume dilation laws, and is able to represent the nonlinear degradation and dilation behaviors of brittle rocks in the post-failure region. A series of triaxial compression tests were carried out on Eibenstock(Germany) granite samples. Based on a lab data fitting procedure, a consistent parameter set for the modified constitutive model was deduced and implemented into the numerical code FLAC3 D. The good agreement between numerical and laboratory results indicates that the modified constitutive law is well suited to represent the nonlinear mechanical behavior of brittle rock especially in the post-failure region. 关键词：三轴压缩试验脆性岩石数值模拟本构关系强度退化膨胀特性 HOEK-BROWN准则非线性力学行为

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Numerical simulation of triaxial compression test for brittle rock sample using a modified constitutive law considering degradation and dilation behavior

参考文献(29)

引证文献(3)

耦合文献(239)

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