A microcrack damage model for brittle rocks under uniaxial compression

被引：68
|
作者：
Zhou, J. W. [1 ]
Xu, W. Y. [2 ]
Yang, X. G. [1 ]
机构：
[1] Sichuan Univ, State Key Lab Hydraul & Mt River Engn, Chengdu 610065, Sichuan, Peoples R China
[2] Hohai Univ, Res Inst Geotech Engn, Nanjing 210098, Peoples R China
来源：
MECHANICS RESEARCH COMMUNICATIONS | 2010年 / 37卷 / 04期
关键词：
Brittle rocks; Uniaxial compression; Microcracks; Fracture mechanics; Damage mechanics; Effective elastic modulus; ANISOTROPIC DAMAGE; FRACTURE; FAILURE; SOLIDS; ISSUES; MODULI;
D O I：
10.1016/j.mechrescom.2010.05.001
中图分类号：
O3 [力学];
学科分类号：
08 ; 0801 ;
摘要：
A microcrack damage model for brittle rocks under uniaxial compression is presented. Based on a supposed random distribution of microcracks, the model incorporates microcrack fracture mechanics, rock damage mechanics, a homogenization method, and the effective elastic modulus of solid materials containing microcracks. Microcracks in rock propagate when the external load reaches a certain level and the mechanical properties of the rock then change. The rate of microcrack propagation increases with the external load until rock macrofailure occurs. Results for Xiangjiaba sandstone and Nuozhadu granite confirm that the damage model can simulate the stress-strain of brittle rocks under uniaxial compression. (C) 2010 Elsevier Ltd. All rights reserved.
引用
收藏
页码：399 / 405
页数：7
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