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

被引：17
作者：
Yu, Zhan [1 ,2 ]
Sun, Yue [2 ]
Vu, Minh-Ngoc [3 ]
Shao, Jian-Fu [1 ,2 ]
机构：
[1] Northeastern Univ, Coll Resources & Civil Engn, Key Lab Minist Educ Safe Min Deep Met Mines, Shenyang 110819, Peoples R China
[2] Univ Lille, CNRS, EC Lille, LaMcube,UMR 9013, F-59000 Lille, France
[3] Andra, Chatenay Malabry, France
来源：
ROCK MECHANICS AND ROCK ENGINEERING | 2023年 / 56卷 / 04期
基金：
中国国家自然科学基金;
关键词：
Damage; Cracking; Crack coalescence; Phase-field method; Rock-like materials; Compressive stresses; PART I; FRACTURE; DAMAGE; PROPAGATION; FORMULATION; GROWTH; MICROMECHANICS; COALESCENCE; COMPUTATION; ALGORITHMS;
D O I：
10.1007/s00603-022-03196-w
中图分类号：
P5 [地质学];
学科分类号：
0709 ; 081803 ;
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. Highlights A new phase-field model is developed for modeling complex cracking in rock-like materialsunder compressive loads. Two damage fields are introduced in order to describe tensile and shear cracks. A new criterion is proposed for the description of shear crack under multi-axial compression. The new model is able to well reproduce complex cracking processes observed in laboratorytests
引用
收藏
页码：2779 / 2792
页数：14
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