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Title: An extended strain energy density failure criterion by differentiating volumetric and distortional deformation
Author: Wei YJ(魏宇杰)
Source: INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES
Issued Date: 2012-05-01
Volume: 49, Issue:9, Pages:1117-1126
Abstract: 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.
Keyword: 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
Language: 英语
Indexed Type: SCI ; EI
Corresponding Author: Wei, YJ ; Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech, Beijing 100190, Peoples R China.
Correspondent Email: yujie_wei@lnm.imech.ac.cn
Related URLs: 查看原文
WOS ID: WOS:000302836300006
ISSN: 0020-7683
Rank: Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech, Beijing 100190, Peoples R China
Subject: 固体力学::疲劳与断裂力学
Department: LNM微结构计算力学(筹)
Classification: 一类/力学重要期刊
Citation statistics:
Content Type: 期刊论文
URI: http://dspace.imech.ac.cn/handle/311007/46668
Appears in Collections:非线性力学国家重点实验室_期刊论文

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魏宇杰.An extended strain energy density failure criterion by differentiating volumetric and distortional deformation,INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES,2012,49(9):1117-1126
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