Crack propagation and coalescence in brittle materials under compression

doi:10.1016/S0013-7944(98)00067-8

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	Crack propagation and coalescence in brittle materials under compression
	Tang CA(唐春安); Kou SQ(寇绍全); Kou, SQ (reprint author), Lulea Univ Technol, Div Min Engn, S-97187 Lulea, Sweden.
发表期刊	Engineering Fracture Mechanics
	1998
卷号	61 期号:3-4 页码:311-324
ISSN	0013-7944
摘要	Two particular cases concerning crack propagation and coalescence in brittle materials have been modeled by using the rock failure process analysis code, RFPA(2D), and the results have been validated by reported experimental observations. Firstly, axial compression of numerical samples containing a number of large, pre-existing flaws and a row of suitably oriented smaller flaws are simulated. It has been confirmed that under axial compression, wing-cracks nucleate at the tips of the pre-existing flaws, grow with increasing compression, and become parallel to the direction of the maximum far-field compression. However, coalescence of the wing-cracks may be in either tensile mode or shear mode, or a combination of both modes. The numerical results show qualitatively a reasonably good agreement with reported experimental observations for samples with similar flaw arrangements. The numerical results demonstrate that, with a confining pressure, the crack growth is stable and stops at some finite crack length; whereas a lateral tensile stress even with a small value will result in an unstable crack growth after a certain crack length is attained. Secondly, failure mode in a sample containing inhomogeneities on grain scale has also been simulated. The results show that the failure mode strongly depends on the mechanical and geometric properties of the grains and inclusions.
学科领域	力学
DOI	10.1016/S0013-7944(98)00067-8
收录类别	SCI ; EI
语种	英语
WOS记录号	WOS:000077871300002
关键词[WOS]	WESTERLY GRANITE ; FRACTURE ; FAILURE ; MODEL ; ROCK
WOS研究方向	Mechanics
WOS类目	Mechanics
引用统计	被引频次：196[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://dspace.imech.ac.cn/handle/311007/15566
专题	力学所知识产出(1956-2008)
通讯作者	Kou, SQ (reprint author), Lulea Univ Technol, Div Min Engn, S-97187 Lulea, Sweden.
推荐引用方式 GB/T 7714	Tang CA,Kou SQ,Kou, SQ . Crack propagation and coalescence in brittle materials under compression[J]. Engineering Fracture Mechanics,1998,61,3-4,:311-324.
APA	唐春安,寇绍全,&Kou, SQ .(1998).Crack propagation and coalescence in brittle materials under compression.Engineering Fracture Mechanics,61(3-4),311-324.
MLA	唐春安,et al."Crack propagation and coalescence in brittle materials under compression".Engineering Fracture Mechanics 61.3-4(1998):311-324.

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