Crack Initiation, Propagation and Coalescence in Rock-Like Material Containing Two Flaws: a Numerical Study Based on Bonded-Particle Model Approach
文献类型：期刊论文
| 作者 | Zhang, Xiao-Ping1,2; Wong, Louis Ngai Yuen1 |
| 刊名 | ROCK MECHANICS AND ROCK ENGINEERING
 |
| 出版日期 | 2013-09-01 |
| 卷号 | 46期号:5页码:1001-1021 |
| ISSN号 | 0723-2632 |
| 关键词 | Bonded-particle model (BPM) Crack type Crack coalescence category Micro-cracking zone |
| DOI | 10.1007/s00603-012-0323-1 |
| 文献子类 | Article |
| 英文摘要 | Cracking and coalescence behavior in a rectangular rock-like specimen containing two parallel (stepped and coplanar) pre-existing open flaws under uniaxial compression load has been numerically studied by a parallel bonded-particle model, which is a type of bonded-particle model. Crack initiation and propagation from two flaws replicate most of the phenomena observed in prior physical experiments, such as the type (tensile/shear) and the initiation stress of the first crack, as well as the coalescence pattern. Eight crack coalescence categories representing different crack types and trajectories are identified. New coalescence categories namely "New 1" and "New 2", which are first observed in the present simulation, are incorporated into categories 3 and 4, and category 5 previously proposed by the MIT Rock Mechanics Research Group, respectively. The flaw inclination angle (beta), the ligament length (L) (spacing between two flaws) and the bridging angle (alpha) (inclination of a line linking up the inner flaw tips, between two flaws) have different effects on the coalescence patterns, coalescence stresses (before, at or post the peak stress) as well as peak strength of specimens. Some insights on the coalescence processes, such as the initiation of cracks in the intact part of specimens at a distance away from the flaw tips, and coalescence due to the development and linkage of a number of steeply inclined to vertical macro-tensile cracks are revealed by the present numerical study. |
| WOS关键词 | UNIAXIAL COMPRESSION ; FRACTURE COALESCENCE ; WESTERLY GRANITE ; CARRARA MARBLE ; BONNET GRANITE ; MOLDED GYPSUM ; FAILURE ; SIMULATION ; BEHAVIOR ; MICROMECHANICS |
| WOS研究方向 | Engineering ; Geology |
| 语种 | 英语 |
| 出版者 | SPRINGER WIEN |
| WOS记录号 | WOS:000323670300005 |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/87804]  |
| 专题 | 中国科学院地质与地球物理研究所 |
| 通讯作者 | Wong, Louis Ngai Yuen |
| 作者单位 | 1.Nanyang Technol Univ, Sch Civil & Environm Engn, Singapore 639798, Singapore 2.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Engn Geomech, Beijing 100029, Peoples R China |
| 推荐引用方式 GB/T 7714 | Zhang, Xiao-Ping,Wong, Louis Ngai Yuen. Crack Initiation, Propagation and Coalescence in Rock-Like Material Containing Two Flaws: a Numerical Study Based on Bonded-Particle Model Approach[J]. ROCK MECHANICS AND ROCK ENGINEERING,2013,46(5):1001-1021. |
| APA | Zhang, Xiao-Ping,&Wong, Louis Ngai Yuen.(2013).Crack Initiation, Propagation and Coalescence in Rock-Like Material Containing Two Flaws: a Numerical Study Based on Bonded-Particle Model Approach.ROCK MECHANICS AND ROCK ENGINEERING,46(5),1001-1021. |
| MLA | Zhang, Xiao-Ping,et al."Crack Initiation, Propagation and Coalescence in Rock-Like Material Containing Two Flaws: a Numerical Study Based on Bonded-Particle Model Approach".ROCK MECHANICS AND ROCK ENGINEERING 46.5(2013):1001-1021. |
入库方式： OAI收割
来源：地质与地球物理研究所
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