Multiscale study of the dynamic friction coefficient due to asperity plowing

doi:10.1007/s40544-020-0438-4

CORC > 力学研究所 > 中国科学院力学研究所 > 非线性力学国家重点实验室

	Multiscale study of the dynamic friction coefficient due to asperity plowing
	Hu JQ(胡剑桥); Song HX ; Sandfeld S ; Liu XM(刘小明); Wei YG(魏悦广)
刊名	FRICTION
	2020
关键词	multiscale friction asperity plowing dislocation plasticity size velocity effect crystal orientation statistical model
ISSN号	2223-7690
DOI	10.1007/s40544-020-0438-4
英文摘要	A macroscopically nominal flat surface is rough at the nanoscale level and consists of nanoasperities. Therefore, the frictional properties of the macroscale-level rough surface are determined by the mechanical behaviors of nanoasperity contact pairs under shear. In this work, we first used molecular dynamics simulations to study the non-adhesive shear between single contact pairs. Subsequently, to estimate the friction coefficient of rough surfaces, we implemented the frictional behavior of a single contact pair into a Greenwood-Williamson-type statistical model. By employing the present multiscale approach, we used the size, rate, and orientation effects, which originated from nanoscale dislocation plasticity, to determine the dependence of the macroscale friction coefficient on system parameters, such as the surface roughness, separation, loading velocity, and direction. Our model predicts an unconventional dependence of the friction coefficient on the normal contact load, which has been observed in nanoscale frictional tests. Therefore, this model represents one step toward understanding some of the relevant macroscopic phenomena of surface friction at the nanoscale level.
分类号	一类
WOS研究方向	Engineering
语种	英语
WOS记录号	WOS:000595394000007
资助机构	National Natural Science Foundation of ChinaNational Natural Science Foundation of China (NSFC) [11802310, 11772334} ; Youth Innovation Promotion Association CAS [2018022} ; Strategic Priority Research Program of the Chinese Academy of SciencesChinese Academy of Sciences [XDB22040501} ; European Research CouncilEuropean Research Council (ERC) [759419}
其他责任者	Liu, XM ; Song, HX
内容类型	期刊论文
源URL	[http://dspace.imech.ac.cn/handle/311007/85416]
专题	力学研究所_非线性力学国家重点实验室
作者单位	1.{Song Hengxu, Sandfeld Stefan} Forschungszentrum Juelich Inst Adv Simulat IAS 9 Mat Data Sci & Informat D-52425 Julich Germany 2.{Hu Jianqiao, Liu Xiaoming} Chinese Acad Sci Inst Mech State Key Lab Nonlinear Mech Beijing 100190 Peoples R China 3.{Hu Jianqiao, Liu Xiaoming} Univ Chinese Acad Sci Sch Engn Sci Beijing 100049 Peoples R China 4.{Wei Yueguang} Peking Univ Coll Engn Dept Mech & Engn Sci Beijing 100871 Peoples R China
推荐引用方式 GB/T 7714	Hu JQ,Song HX,Sandfeld S,et al. Multiscale study of the dynamic friction coefficient due to asperity plowing[J]. FRICTION,2020.
APA	胡剑桥,Song HX,Sandfeld S,刘小明,&魏悦广.(2020).Multiscale study of the dynamic friction coefficient due to asperity plowing.FRICTION.
MLA	胡剑桥,et al."Multiscale study of the dynamic friction coefficient due to asperity plowing".FRICTION (2020).