Mechanics of adhesive contact at the nanoscale: The effect of surface   stress

doi:10.1016/j.ijsolstr.2013.10.017

CORC > 北京大学 > 工学院

	Mechanics of adhesive contact at the nanoscale: The effect of surface stress
	Gao, Xiang ; Hao, Feng ; Huang, Zhuping ; Fang, Daining
刊名	international journal of solids and structures
	2014
关键词	Adhesive contact Surface effect Pull-off force Dimensional analysis Scaling laws NANO-INHOMOGENEITIES INTERFACE STRESS ELASTIC SOLIDS ENERGY DEFORMATION TENSION LAW PARTICLES NANOWIRES STRAIN
DOI	10.1016/j.ijsolstr.2013.10.017
英文摘要	At small length scales, the adhesion and surface effect are of great significance, both of which play important roles in the contact between two elastic solids. In this study, the classical Johnson-Kendall-Roberts (JKR) adhesive contact theory is generalized to the nanoscale at which the surface effect is considered. The influence of the surface stress on the JKR adhesive contact is investigated by employing the non-classical Boussinesq fundamental solutions. It is found that, compared with the classical theory, the pull-off force increases while the critical contact radius decreases as a result of the surface effect. Numerical results show that a relative error of 10% can be introduced in the pull-off force when the indenter radius is less than 20 nm. A detailed theoretical analysis of this interesting phenomenon is presented based on dimensional analysis, and two scaling laws for the adhesive contact at the nanoscale are constructed. These two new scaling laws reveal that the pull-off force is relevant to the elastic properties of the bulk materials, which is different from the classical adhesive contact theory. The present work is promising for the engineering applications in micro-electro-mechanical systems (MEMS) and nano-intelligent devices. (C) 2013 Elsevier Ltd. All rights reserved.; http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000330485800002&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=8e1609b174ce4e31116a60747a720701 ; Mechanics; SCI(E); EI; 4; ARTICLE; fangdn@pku.edu.cn; 3-4; 566-574; 51
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/154345]
专题	工学院
推荐引用方式 GB/T 7714	Gao, Xiang,Hao, Feng,Huang, Zhuping,et al. Mechanics of adhesive contact at the nanoscale: The effect of surface stress[J]. international journal of solids and structures,2014.
APA	Gao, Xiang,Hao, Feng,Huang, Zhuping,&Fang, Daining.(2014).Mechanics of adhesive contact at the nanoscale: The effect of surface stress.international journal of solids and structures.
MLA	Gao, Xiang,et al."Mechanics of adhesive contact at the nanoscale: The effect of surface stress".international journal of solids and structures (2014).