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Title:
The influence of crack-orientation distribution on the mechanical properties of pre-cracked brittle media
Author: Zeng, XG; Wei YJ(魏宇杰)
Source: INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES
Issued Date: 2016
Volume: 96, Pages:64-73
Abstract:

Cracks in kerogen-rich shales and other brittle rock-like materials have a tremendous impact on their elastic properties and strength. In this paper, we investigate the effective mechanical properties of shale plates with pre-existing cracks. We employ the extended finite element method (XFEM) to investigate a pre-cracked medium with an elastic, isotropic and brittle shale matrix. We show how the mechanical properties of the orthotropic shale plates are dependent on the crack density and the standard deviation of crack angles. Both the Young's modulus and the Poisson's ratio of the cracked media exhibit a linear dependence on the standard deviation of crack angles, in contrast to the nonlinear dependence of the strength on the angle deviation. Finally, we propose mechanical models to capture the relationship between the mechanical properties and the distribution characteristics of pre-existing cracks in shales. These phenomenological models could be applied to estimate the fracking behavior of shales in engineering practice. (C) 2016 Elsevier Ltd. All rights reserved.

Keyword: Pre-cracked media ; Crack distribution ; Extended finite element method (XFEM) ; Elastic properties ; Strength
Language: 英语
Indexed Type: SCI ; EI
Corresponding Author: Wei, YJ (reprint author), Chinese Acad Sci, Inst Mech, LNM, Beijing 100190, Peoples R China.
Correspondent Email: yujie_wei@lnm.imech.ac.cn
DOI: 10.1016/j.ijsolstr.2016.06.022
Related URLs: 查看原文
DOC Type: 期刊论文
WOS Subject: Mechanics
WOS Subject Extended: Mechanics
WOS Keyword Plus: Pre-cracked media ; Crack distribution ; Extended finite element method (XFEM) ; Elastic properties ; Strength
WOS ID: WOS:000381324700006
ISSN: 0020-7683
Funder: The authors acknowledge support from the National Natural Science Foundation of China (NSFC) (Grant no. 11425211) and MOST 973 of China (Grant no. 2012CB937500).
Rank: [Zeng, Xiaguang; Wei, Yujie] Chinese Acad Sci, Inst Mech, LNM, Beijing 100190, Peoples R China
Department: LNM微结构计算力学(筹)
Classification: 一类/力学重要期刊
First Institution (Yes or Not): True
Citation statistics:
Content Type: 期刊论文
URI: http://dspace.imech.ac.cn/handle/311007/59740
Appears in Collections:非线性力学国家重点实验室_期刊论文

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Recommended Citation:
Zeng, XG,Wei YJ. The influence of crack-orientation distribution on the mechanical properties of pre-cracked brittle media[J]. INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES,2016-01-01,96:64-73.
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