Modeling of Mixed Cracks in Rock-Like Brittle Materials Under Compressive Stresses by a Double-Phase-Field Method

被引：0
作者：
Zhan Yu
Yue Sun
Minh-Ngoc Vu
Jian-Fu Shao
机构：
[1] Northeastern University,Key Laboratory of Ministry of Education on Safe Mining of Deep Metal Mines, College of Resources and Civil Engineering
[2] University of Lille,CNRS, EC Lille, LaMcube, UMR9013
[3] Andra,undefined
来源：
Rock Mechanics and Rock Engineering | 2023年 / 56卷
关键词：
Damage; Cracking; Crack coalescence; Phase-field method; Rock-like materials; Compressive stresses;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
A new double-phase-field model is proposed in this paper for modeling cracking processes in rock-like brittle materials under compression-dominating stresses. For this purpose, two crack-phase fields are used to describe tensile and shear cracks respectively. Compared with previous works, a stress-based new criterion is proposed to more physically capture the evolution of shear cracks in rock-like materials. The effects of mean stress and internal friction are taken into account. The proposed model is implemented in the finite element framework. It is applied to investigating cracking processes in a rock sample containing two initial flaws and subjected to uniaxial and biaxial compression. Both the tensile wing and shear cracks as well as crack coalescence observed in laboratory tests are successfully reproduced by the proposed method.
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页码：2779 / 2792
页数：13
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