Empirical relationship between interfacial shear stress and contact pressure in micro- and macro-scale friction

被引：28
|
作者：
He, Xin [1 ,2 ]
Liu, Zhong [3 ]
Ripley, Lars B. [4 ]
Swensen, Victoria L. [4 ]
Griffin-Wiesner, Isaac J. [4 ]
Gulner, Beatrice R. [4 ]
McAndrews, Gabriel R. [4 ]
Wieser, Raymond J. [4 ]
Borovsky, Brian P. [4 ]
Wang, Q. Jane [3 ]
Kim, Seong H. [1 ,2 ]
机构：
[1] Penn State Univ, Dept Chem Engn, University Pk, PA 16802 USA
[2] Penn State Univ, Mat Res Inst, University Pk, PA 16802 USA
[3] Northwestern Univ, Dept Mech Engn, Evanston, IL 60208 USA
[4] St Olaf Coll, Dept Phys, Northfield, MN 55057 USA
来源：
TRIBOLOGY INTERNATIONAL | 2021年 / 155卷
基金：
美国国家科学基金会;
关键词：
Amontons' law; Contact mechanics; Area of true contact; Shear stress; JKR-DMT TRANSITION; BOUNDARY LUBRICATION; MOLECULAR-STRUCTURE; PHYSISORBED MOLECULES; KINETIC FRICTION; STATIC FRICTION; SURFACE; DEPENDENCE; BEHAVIOR; VAPOR;
D O I：
10.1016/j.triboint.2020.106780
中图分类号：
TH [机械、仪表工业];
学科分类号：
0802 ;
摘要：
This study examines the empirical relationship between frictional shear stress and pressure in macroand micro scale contact and sliding. Two types of friction tests are reported; the macro-scale tests deal with kinetic friction between stainless steel surfaces in a vapor phase lubrication condition, and the micro-scale tests measure kinetic friction at interfaces formed between MoS2 basal planes and surfaces of alumina or stainless steel specimens, using a quartz crystal microbalance microtribometer. A numerical model is used to calculate the contact areas in the macro-scale tests. The results from both friction tests confirmed that the interfacial shear stress in the contact area due to kinetic friction is proportional to the average contact pressure, and the constant of proportionality is close to the coefficient of friction (COF). These observations add to the validation of the Amontons' law.
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页数：8
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