IMECH-IR  > 非线性力学国家重点实验室
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.
Source PublicationJOURNAL OF THE MECHANICS AND PHYSICS OF SOLIDS
2014-10
Volume70Pages:227-241
ISSN0022-5096
AbstractWe 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.
KeywordFatigue-crack Growth Cohesive Zone Model Cell-adhesion Numerical-simulation Mechanical Model Brownian-motion Molecular-bond Elastic Solids Force Resistance
Subject AreaMaterials Science ; Mechanics ; Physics
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Indexed BySCI ; EI
Language英语
WOS IDWOS:000341466200013
Funding OrganizationThe 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).
DepartmentLNM微结构计算力学(筹)
Classification一类
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Document Type期刊论文
Identifierhttp://dspace.imech.ac.cn/handle/311007/49135
Collection非线性力学国家重点实验室
Corresponding AuthorWei, YJ (reprint author), Chinese Acad Sci, Inst Mech, LNM, Beijing 100190, Peoples R China.
Recommended Citation
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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