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Unifying linear proportionality between real contact area and load in rough surface contact

文献类型：期刊论文

作者Meng, Qinghua4; Song HX(宋恒旭)1,3; Zhou, Yunong2; Liu XM(刘小明)1,3; Shi, Xinghua1,4
刊名JOURNAL OF THE MECHANICS AND PHYSICS OF SOLIDS
出版日期2025-03-01
卷号196页码:18
关键词Rough surface Elastic contact Contact model Mean absolute slope Shape coefficient
ISSN号0022-5096
DOI10.1016/j.jmps.2024.105975
通讯作者Liu, Xiaoming(xiaomingliu@imech.ac.cn) ; Shi, Xinghua(shixh@nanoctr.cn)
英文摘要A long-standing debate and challenge in contact mechanics is to confirm the linearity between the real contact area and load on rough surfaces as well as its proportionality. Here, we first theoretically prove the linearity between the real contact area and load on rough surfaces by considering an infinite number of surface asperities. The mechanism for such linearity is that the applied force on each "small region" on the rough surface is directly proportional to the area of the region, resulting in a statistical proportionality between the total load and area. This explanation is confirmed via Green's function molecular dynamics (GFMD) simulations. On this basis, we develop a novel framework of surface slope-based multi-asperity contact model. The proportionality between the contact load and area is governed by the elastic property, mean absolute slope, and shape coefficient of the contact surface over the pressed depth. The elastic contacts of single-scale and multiscale rough surfaces are investigated using the developed contact model and GFMD. The shape coefficient of rough surfaces predicted by numerical simulations closely resembles that of surfaces with symmetric parabolic asperities. This work not only sheds light on the physical mechanism underlying the linearity between the contact area and load on rough surfaces but also provides a theoretical foundation for designing and evaluating surface contact and friction performance in micro- and nano-engineering systems.
分类号一类/力学重要期刊
WOS关键词ELASTIC CONTACT ; RUBBER-FRICTION ; MODEL ; MECHANICS ; LAWS ; DEFORMATION ; GREENWOOD
资助项目National Key R&D Program of China[2022YFA1203200] ; Basic Science Center Project of the National Natural Science Foundation of China[22388101] ; Strategic Priority Research Program of the Chinese Academy of Sciences[XDB36000000] ; National Natural Science Foundation of China[12125202] ; National Natural Science Foundation of China[12022210] ; National Natural Science Foundation of China[12032001]
WOS研究方向Materials Science ; Mechanics ; Physics
语种英语
WOS记录号WOS:001373827600001
资助机构National Key R&D Program of China ; Basic Science Center Project of the National Natural Science Foundation of China ; Strategic Priority Research Program of the Chinese Academy of Sciences ; National Natural Science Foundation of China
其他责任者Liu, Xiaoming ; Shi, Xinghua
源URL[http://dspace.imech.ac.cn/handle/311007/97771]  
专题力学研究所_非线性力学国家重点实验室
作者单位1.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
2.Yangzhou Univ, Dept Civil Engn, Yangzhou 225127, Peoples R China;
3.Chinese Acad Sci, Inst Mech, LNM, Beijing 100190, Peoples R China;
4.Chinese Acad Sci, CAS Ctr Excellence Nanosci, Natl Ctr Nanosci & Technol, Lab Theoret & Computat Nanosci, Beijing 100190, Peoples R China;
推荐引用方式
GB/T 7714		 Meng, Qinghua,Song HX,Zhou, Yunong,et al. Unifying linear proportionality between real contact area and load in rough surface contact[J]. JOURNAL OF THE MECHANICS AND PHYSICS OF SOLIDS,2025,196:18.
APA Meng, Qinghua,宋恒旭,Zhou, Yunong,刘小明,&Shi, Xinghua.(2025).Unifying linear proportionality between real contact area and load in rough surface contact.JOURNAL OF THE MECHANICS AND PHYSICS OF SOLIDS,196,18.
MLA Meng, Qinghua,et al."Unifying linear proportionality between real contact area and load in rough surface contact".JOURNAL OF THE MECHANICS AND PHYSICS OF SOLIDS 196(2025):18.

入库方式： OAI收割

来源：力学研究所

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