IMECH-IR  > 力学所知识产出(1956-2008)
Steady-state crack growth and fracture work based on the theory of mechanism-based strain gradient plasticity
Wei YG(魏悦广); Qiu X; Hwang KC; Wei, Y (reprint author), Chinese Acad Sci, Inst Mech, LNM, Beijing 100080, Peoples R China.
Source PublicationEngineering Fracture Mechanics
2003
Volume71Pages:107-125
ISSN0013-7944
AbstractMode I steady-state crack growth is analyzed under plane strain conditions in small scale yielding. The elastic-plastic solid is characterized by the mechanism-based strain gradient (MSG) plasticity theory [J. Mech. Phys. Solids 47 (1999) 1239, J. Mech. Phys. Solids 48 (2000) 99]. The distributions of the normal separation stress and the effective stress along the plane ahead of the crack tip are computed using a special finite element method based on the steady-state fundamental relations and the MSG flow theory. The results show that during the steady-state crack growth, the normal separation stress on the plane ahead of the crack tip can achieve considerably high value within the MSG strain gradient sensitive zone. The results also show that the crack tip fields are insensitive to the cell size parameter in the MSG theory. Moreover, in the present research, the steady-state fracture toughness is computed by adopting the embedded process zone (EPZ) model. The results display that the steady-state fracture toughness strongly depends on the separation strength parameter of the EPZ model and the length scale parameter in the MSG theory. Furthermore, in order for the results of steady crack growth to be comparable, an approximate relation between the length scale parameters in the MSG theory and in the Fleck-Hutchinson strain gradient plasticity theory is obtained.
Subject Area力学
DOI10.1016/S0013-7944(03)00065-1
Indexed BySCI ; EI
Language英语
WOS IDWOS:000185968600006
WOS KeywordTIP FIELDS ; INTERFACE ADHESION ; MICRO-INDENTATION ; SINGLE-CRYSTALS ; 1ST PRINCIPLES ; SOLIDS ; RESISTANCE ; MODEL ; DELAMINATION ; DECOHESION
WOS Research AreaMechanics
WOS SubjectMechanics
Citation statistics
Cited Times:28[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://dspace.imech.ac.cn/handle/311007/17667
Collection力学所知识产出(1956-2008)
Corresponding AuthorWei, Y (reprint author), Chinese Acad Sci, Inst Mech, LNM, Beijing 100080, Peoples R China.
Recommended Citation
GB/T 7714
Wei YG,Qiu X,Hwang KC,et al. Steady-state crack growth and fracture work based on the theory of mechanism-based strain gradient plasticity[J]. Engineering Fracture Mechanics,2003,71:107-125.
APA 魏悦广,Qiu X,Hwang KC,&Wei, Y .(2003).Steady-state crack growth and fracture work based on the theory of mechanism-based strain gradient plasticity.Engineering Fracture Mechanics,71,107-125.
MLA 魏悦广,et al."Steady-state crack growth and fracture work based on the theory of mechanism-based strain gradient plasticity".Engineering Fracture Mechanics 71(2003):107-125.
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