Analysis of fracture process zone in brittle rock subjected to shear-compressive loading

被引：2
|
作者：
周德泉
陈枫
曹平
马春德
机构：
[1] ,School of Resources and Safety Engineering, Central South University, Changsha 410083, China8 ,School of Resources and Safety Engineering, Central South University, Changsha 410083, China ,School of Resources and Safety Engineering, Central South Universi
[2] Institute of Geotechnical Engineering, Changsha University of Science and Technology, Changsha 410076, China
来源：
Journal of Central South University of Technology(English Edition) | 2005年 / 02期
基金：
中国国家自然科学基金;
关键词：
brittle rock; shear-compressive loading; fracture process zone;
D O I：
暂无
中图分类号：
O346.11 [];
学科分类号：
080102 ;
摘要：
An analytical expression for the prediction of shear-compressive fracture process zone(SCFPZ) is derived by using a proposed local strain energy density criterion, in which the strain energy density is separated into the dilatational and distortional strain energy density, only the former is considered to contribute to the brittle fracture of rock in different loading cases. The theoretical prediction by this criterion shows that the SCFPZ is of asymmetric mulberry leaf in shape, which forms a shear-compression fracture kern. Dilatational strain energy density along the boundary of SCFPZ reaches its maximum value. The dimension of SCFPZ is governed by the ratio of K_Ⅱ to (K_Ⅰ.) The analytical results are then compared with those from literatures and the tests conducted on double edge cracked Brazilian disk subjected to diametrical compression. The obtained results are useful to the prediction of crack extension and to nonlinear analysis of shear-compressive fracture of brittle rock.
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页码：209 / 213
页数：5
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