Adhesive Elastic Contact of Rough Surfaces with Power-Law Axisymmetric Asperities

被引：2
|
作者：
Wang, Lefeng [1 ]
Rong, Weibin [2 ]
Shao, Bing [2 ]
Sun, Lining [2 ]
机构：
[1] Harbin Inst Technol, Key Lab Microsyst & Microstruct Mfg, Minist Educ, Harbin 150001, Peoples R China
[2] Harbin Inst Technol, State Key Lab Robot & Syst, Harbin 150001, Peoples R China
来源：
JOURNAL OF TRIBOLOGY-TRANSACTIONS OF THE ASME | 2012年 / 134卷 / 03期
基金：
中国国家自然科学基金;
关键词：
adhesive contact; surface roughness; axisymmetric asperities; power-law shape; MECHANICS; SOLIDS; FRICTION; MODEL;
D O I：
10.1115/1.4006782
中图分类号：
TH [机械、仪表工业];
学科分类号：
0802 ;
摘要：
The contact model for rough surfaces with power-law axisymmetric asperities in the presence of adhesion is developed. The extended JKR adhesive contact model for power-law axisymmetric asperities, denoted as JKR-n, developed by Zheng and Yu (2007,"Using the Dugdale Approximation to Match a Specific Interaction in the Adhesive Contact of Elastic Objects," J. Colloid Interface Sci., 310, pp. 27-34) is utilized to investigate the adhesive contact of rough surfaces. The JKR-n adhesive contact model generalizes the most adopted JKR model for spherical objects of n = 2. This work compares the effect of surface roughness on the adhesion force for rough surfaces with various power-law axisymmetric asperities. It is found that shapes of the asperities influence the pull-off forces greatly during the separation of rough surfaces. A general adhesion parameter that includes the shape index of asperities is proposed, and it can be used to characterize the adhesion performance of rough surfaces. [DOI: 10.1115/1.4006782]
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页数：5
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