An extended strain energy density failure criterion by differentiating volumetric and distortional deformation

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	An extended strain energy density failure criterion by differentiating volumetric and distortional deformation
	Wei YJ(魏宇杰); Wei, YJ; Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech, Beijing 100190, Peoples R China.
发表期刊	INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES
	2012-05-01
卷号	49 期号:9 页码:1117-1126
ISSN	0020-7683
摘要	We extend Sih's strain energy density criterion (Si h, 1974) for crack kinks and material failure by weighting differently the volumetric and distortional parts in the extended strain energy density factor. The work is inspired by the factor that failure by microscopic shearing governed by distortion and microscopic separation controlled by hydrostatic tension represent distinct deformation processes, and should be treated differently as we count their influences to material failure. With the weight parameter introduced to the extended strain energy density factor criterion, we explain satisfactorily several critical experiments which reported crack kink in samples subjected to mixed-mode loading. The extended strain energy density idea is also used to derive a generalized pressure-dependent yielding criterion, which supplies a theoretical basis for those novel strength criteria for materials like bulk metallic glasses. Corresponding methods to determine the two material parameters, the critical strain energy density factor and the weight parameter quantifying the relative contribution by distortion over volumetric deformation, are discussed.
关键词	Strain Energy Density Fracture Criterion Crack Kink Pressure-dependent Yielding Distortional And Volumetric Stress Intensity Factors Crack-growth Fracture-mechanics Plane Situations Tip Expansion Ductile Kinking Paths Form
学科领域	疲劳与断裂力学
URL	查看原文
收录类别	SCI ; EI
语种	英语
WOS记录号	WOS:000302836300006
项目资助者	Supports from CAS Hundred Talent Project, KJCX2-EW-L03, 973 Project (2011CB711103), and NSFC grant (11021262) are acknowledged.
课题组名称	LNM微结构计算力学（筹）
论文分区	一类/力学重要期刊
引用统计	被引频次：21[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/311007/46668
专题	非线性力学国家重点实验室
通讯作者	Wei, YJ; Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech, Beijing 100190, Peoples R China.
推荐引用方式 GB/T 7714	Wei YJ,Wei, YJ,Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech, Beijing 100190, Peoples R China.. An extended strain energy density failure criterion by differentiating volumetric and distortional deformation[J]. INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES,2012,49,9,:1117-1126.
APA	魏宇杰,Wei, YJ,&Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech, Beijing 100190, Peoples R China..(2012).An extended strain energy density failure criterion by differentiating volumetric and distortional deformation.INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES,49(9),1117-1126.
MLA	魏宇杰,et al."An extended strain energy density failure criterion by differentiating volumetric and distortional deformation".INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES 49.9(2012):1117-1126.

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