Interface crack problems with strain gradient effects

doi:10.1023/A:1020904510702

IMECH-IR > 力学所知识产出(1956-2008)

	Interface crack problems with strain gradient effects
	Chen SH(陈少华); Wang ZQ(王自强); Chen, SH (reprint author), Chinese Acad Sci, Inst Mech, LNM, Beijing 100080, Peoples R China.
发表期刊	International Journal of Fracture
	2002
卷号	117 期号:1 页码:25-37
ISSN	0376-9429
摘要	In this paper, the strain gradient theory proposed by Chen and Wang (2001 a, 2002b) is used to analyze an interface crack tip field at micron scales. Numerical results show that at a distance much larger than the dislocation spacing the classical continuum plasticity is applicable; but the stress level with the strain gradient effect is significantly higher than that in classical plasticity immediately ahead of the crack tip. The singularity of stresses in the strain gradient theory is higher than that in HRR field and it slightly exceeds or equals to the square root singularity and has no relation with the material hardening exponents. Several kinds of interface crack fields are calculated and compared. The interface crack tip field between an elastic-plastic material and a rigid substrate is different from that between two elastic-plastic solids. This study provides explanations for the crack growth in materials by decohesion at the atomic scale.
学科领域	力学
DOI	10.1023/A:1020904510702
收录类别	SCI ; EI
语种	英语
WOS记录号	WOS:000179613800002
关键词[WOS]	TIP FIELDS ; MODE-I ; INDENTATION EXPERIMENTS ; NONLOCAL THEORY ; PLASTICITY ; FRACTURE ; SOLIDS ; CONTINUUM ; HARDNESS ; GROWTH
WOS研究方向	Materials Science ; Mechanics
WOS类目	Materials Science, Multidisciplinary ; Mechanics
引用统计	被引频次：16[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/311007/17012
专题	力学所知识产出(1956-2008)
通讯作者	Chen, SH (reprint author), Chinese Acad Sci, Inst Mech, LNM, Beijing 100080, Peoples R China.
推荐引用方式 GB/T 7714	Chen SH,Wang ZQ,Chen, SH . Interface crack problems with strain gradient effects[J]. International Journal of Fracture,2002,117,1,:25-37.
APA	陈少华,王自强,&Chen, SH .(2002).Interface crack problems with strain gradient effects.International Journal of Fracture,117(1),25-37.
MLA	陈少华,et al."Interface crack problems with strain gradient effects".International Journal of Fracture 117.1(2002):25-37.

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