A stochastic description on the traction-separation law of an interface with non-covalent bonding

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	A stochastic description on the traction-separation law of an interface with non-covalent bonding
	Wei YJ(魏宇杰); Wei, YJ (reprint author), Chinese Acad Sci, Inst Mech, LNM, Beijing 100190, Peoples R China.
发表期刊	JOURNAL OF THE MECHANICS AND PHYSICS OF SOLIDS
	2014-10
卷号	70 页码:227-241
ISSN	0022-5096
摘要	We formulate a stochastic description about the mechanical response of an interface composed of non-covalent bonds. In such interfaces, the evolution of bonding probability in response to deformation plays the central role in determining their traction-separation behavior. The model connects atomistic and molecular level bonding properties to meso-scale traction-separation relationship in an interface. In response to quasi-static loading, the traction-separation of a stochastic interface is the resultant of varying bonding probability as a function of separation, and the bonding probability follows the Boltzmann distribution. The quasi-static stochastic interface model is applied to understand the critical force while detaching a sphere from an infinite half space. We further show the kinetics of interfacial debonding in the context of the Bell model (1978) and two of its derivatives - the Evans-Richie model (1997) and the Freund model (2009). While subjected to constant force, an interface creeps and its separation time curve shows typical characteristics seen during the creep of crystalline materials at high temperature. When we exert constant separation rate to an interface, interfacial traction shows strong rate-sensitivity with higher traction at faster separation rate. The model presented here may supply a guidance to bring the stochastic nature of interfacial debonding into theories on cracking initiation and growth during fatigue fracture. (C) 2014 The Author. Published by Elsevier Ltd.
关键词	Fatigue-crack Growth Cohesive Zone Model Cell-adhesion Numerical-simulation Mechanical Model Brownian-motion Molecular-bond Elastic Solids Force Resistance
学科领域	Materials Science ; Mechanics ; Physics
URL	查看原文
收录类别	SCI ; EI
语种	英语
WOS记录号	WOS:000341466200013
项目资助者	The research reported is supported by Chinese Academy of Sciences (KJCX2-EW-L03), MOST 973 of China (No. 2012CB937500), and National Natural Science Foundation of China (11021262).
课题组名称	LNM微结构计算力学（筹）
论文分区	一类
引用统计	被引频次：27[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://dspace.imech.ac.cn/handle/311007/49134
专题	非线性力学国家重点实验室
通讯作者	Wei, YJ (reprint author), Chinese Acad Sci, Inst Mech, LNM, Beijing 100190, Peoples R China.
推荐引用方式 GB/T 7714	Wei YJ,Wei, YJ . A stochastic description on the traction-separation law of an interface with non-covalent bonding[J]. JOURNAL OF THE MECHANICS AND PHYSICS OF SOLIDS,2014,70:227-241.
APA	魏宇杰,&Wei, YJ .(2014).A stochastic description on the traction-separation law of an interface with non-covalent bonding.JOURNAL OF THE MECHANICS AND PHYSICS OF SOLIDS,70,227-241.
MLA	魏宇杰,et al."A stochastic description on the traction-separation law of an interface with non-covalent bonding".JOURNAL OF THE MECHANICS AND PHYSICS OF SOLIDS 70(2014):227-241.

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