Singularity of dynamic stress fields around an interface crack between viscoelastic bodies

CORC > 力学研究所 > 中国科学院力学研究所 > 力学所知识产出(1956-2008)

	Singularity of dynamic stress fields around an interface crack between viscoelastic bodies
	Wei PJ(魏培君); Zhang SY(张双寅)
刊名	International Journal of Fracture
	2004
通讯作者邮箱	weipj@126.com
卷号	126 期号:2 页码:165-177
关键词	Interface Crack Singular Integral Equation Singularity Index Viscoelastic Bi-Materials Elastic Half-Planes Dissimilar Media Griffith Crack
ISSN号	0376-9429
通讯作者	Wei, PJ (reprint author), Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech, Beijing 100080, Peoples R China.
中文摘要	The singular nature of the dynamic stress fields around an interface crack located between two dissimilar isotropic linearly viscoelastic bodies is studied. A harmonic load is imposed on the surfaces of the interface crack. The dynamic stress fields around the crack are obtained by solving a set of simultaneous singular integral equations in terms of the normal and tangent crack dislocation densities. The singularity of the dynamic stress fields near the crack tips is embodied in the fundamental solutions of the singular integral equations. The investigation of the fundamental solutions indicates that the singularity and oscillation indices of the stress fields are both dependent upon the material constants and the frequency of the harmonic load. This observation is different from the well-known -1/2 oscillating singularity for elastic bi-materials. The explanation for the differences between viscoelastic and elastic bi-materials can be given by the additional viscosity mismatch in the case of viscoelastic bi-materials. As an example, the standard linear solid model of a viscoelastic material is used. The effects of the frequency and the material constants (short-term modulus, long-term modulus and relaxation time) on the singularity and the oscillation indices are studied numerically.
类目[WOS]	Materials Science, Multidisciplinary ; Mechanics
研究领域[WOS]	Materials Science ; Mechanics
关键词[WOS]	ELASTIC HALF-PLANES ; DISSIMILAR MEDIA ; GRIFFITH CRACK
收录类别	SCI ; EI
语种	英语
WOS记录号	WOS:000221913600004
公开日期	2009-08-03 ; 2010-06-13
内容类型	期刊论文
源URL	[http://dspace.imech.ac.cn/handle/311007/33783]
专题	力学研究所_力学所知识产出(1956-2008)
推荐引用方式 GB/T 7714	Wei PJ,Zhang SY. Singularity of dynamic stress fields around an interface crack between viscoelastic bodies[J]. International Journal of Fracture,2004,126(2):165-177.
APA	魏培君,&张双寅.(2004).Singularity of dynamic stress fields around an interface crack between viscoelastic bodies.International Journal of Fracture,126(2),165-177.
MLA	魏培君,et al."Singularity of dynamic stress fields around an interface crack between viscoelastic bodies".International Journal of Fracture 126.2(2004):165-177.