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	Surface effects on the near-tip stress fields of a mode-II crack
	Fu, X. L. ; Wang, G. F. ; Feng, X. Q.
	2010-05-07 ; 2010-05-07
关键词	Crack Surface effect Crack-tip field Nanomechanics Finite element method DEPENDENT ELASTIC PROPERTIES NANO-INHOMOGENEITIES SIZE BEHAVIOR EQUILIBRIUM COMPOSITES SOLIDS FILMS Materials Science, Multidisciplinary Mechanics
中文摘要	On the physical nature, most crack tips are not ideally sharp but have a small curvature radius. Both surface energy and crack-root curvature affect the stress and displacement fields in the vicinity of the crack tip. In the present paper, a numerical method, which incorporates the effect of surface elasticity into the finite element method, is employed to study the surface effects on the mode-II crack tip fields. It is found that when the curvature radius of the crack root decreases to micro-/nanometers, surface elasticity has a significant influence on the stresses near the crack tip. For a mode-II crack, surface effects alter both the magnitude and position of the maximum stresses, as is different from a mode-I crack, in which case only the stress magnitude is influence by surface stresses.
语种	英语 ; 英语
出版者	SPRINGER ; DORDRECHT ; VAN GODEWIJCKSTRAAT 30, 3311 GZ DORDRECHT, NETHERLANDS
内容类型	期刊论文
源URL	[http://hdl.handle.net/123456789/15910]
专题	清华大学
推荐引用方式 GB/T 7714	Fu, X. L.,Wang, G. F.,Feng, X. Q.. Surface effects on the near-tip stress fields of a mode-II crack[J],2010, 2010.
APA	Fu, X. L.,Wang, G. F.,&Feng, X. Q..(2010).Surface effects on the near-tip stress fields of a mode-II crack..
MLA	Fu, X. L.,et al."Surface effects on the near-tip stress fields of a mode-II crack".(2010).

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