Strain gradient plasticity analysis of elasto-plastic contact between rough surfaces

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	Strain gradient plasticity analysis of elasto-plastic contact between rough surfaces
	Song H; Van der Giessen, E; Liu X
刊名	JOURNAL OF THE MECHANICS AND PHYSICS OF SOLIDS
	2016
通讯作者邮箱	E.van.der.Giessen@rug.nl ; xiaomingliu@lnm.imech.ac.cn
卷号	96 页码:18-28
关键词	Rough surface Contact Strain gradient plasticity Pressure distribution
ISSN号	0022-5096
通讯作者	Van der Giessen, E (reprint author), Univ Groningen, Zernike Inst Adv Mat, NL-9747 AG Groningen, Netherlands. ; Liu, X (reprint author), Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech, Beijing 100190, Peoples R China.
产权排序	[Song, H.; Van der Giessen, E.] Univ Groningen, Zernike Inst Adv Mat, NL-9747 AG Groningen, Netherlands; [Liu, X.] Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech, Beijing 100190, Peoples R China
中文摘要	From a microscopic point of view, the real contact area between two rough surfaces is the sum of the areas of contact between facing asperities. Since the real contact area is a fraction of the nominal contact area, the real contact pressure is much higher than the nominal contact pressure, which results in plastic deformation of asperities. As plasticity is size dependent at size scales below tens of micrometers, with the general trend of smaller being harder, macroscopic plasticity is not suitable to describe plastic deformation of small asperities and thus fails to capture the real contact area and pressure accurately. Here we adopt conventional mechanism-based strain gradient plasticity (CMSGP) to analyze the contact between a rigid platen and an elasto-plastic solid with a rough surface. Flattening of a single sinusoidal asperity is analyzed first to highlight the difference between CMSGP and J(2) isotropic plasticity. For the rough surface contact, besides CMSGP, pure elastic and J(2) isotropic plasticity analysis is also carried out for comparison. In all cases, the contact area A rises linearly with the applied load, but with a different slope which implies that the mean contact pressures are different. CMSGP produces qualitative changes in the distributions of local contact pressures compared with pure elastic and J(2) isotropic plasticity analysis, furthermore, bounded by the two. (C) 2016 Elsevier Ltd. All rights reserved.
分类号	一类
类目[WOS]	Materials Science, Multidisciplinary ; Mechanics ; Physics, Condensed Matter
研究领域[WOS]	Materials Science ; Mechanics ; Physics
关键词[WOS]	Rough surface ; Contact ; Strain gradient plasticity ; Pressure distribution
收录类别	SCI ; EI
原文出处	http://dx.doi.org/10.1016/j.jmps.2016.07.008
语种	英语
WOS记录号	WOS:000386744600002
内容类型	期刊论文
源URL	[http://dspace.imech.ac.cn/handle/311007/59941]
专题	力学研究所_非线性力学国家重点实验室
推荐引用方式 GB/T 7714	Song H,Van der Giessen, E,Liu X. Strain gradient plasticity analysis of elasto-plastic contact between rough surfaces[J]. JOURNAL OF THE MECHANICS AND PHYSICS OF SOLIDS,2016,96:18-28.
APA	Song H,Van der Giessen, E,&Liu X.(2016).Strain gradient plasticity analysis of elasto-plastic contact between rough surfaces.JOURNAL OF THE MECHANICS AND PHYSICS OF SOLIDS,96,18-28.
MLA	Song H,et al."Strain gradient plasticity analysis of elasto-plastic contact between rough surfaces".JOURNAL OF THE MECHANICS AND PHYSICS OF SOLIDS 96(2016):18-28.