The onset of plastic yielding in a coated sphere compressed by a rigid flat

被引：47
作者：
Goltsberg, R. [1 ]
Etsion, I. [1 ]
Davidi, G. [1 ]
机构：
[1] Technion Israel Inst Technol, Dept Mech Engn, IL-32000 Haifa, Israel
来源：
WEAR | 2011年 / 271卷 / 11-12期
关键词：
Contact mechanics; Hard coating; Onset of plasticity; DIAMOND-LIKE CARBON; SOLID LUBRICANT COATINGS; METALLIC-FILMS; THIN COATINGS; HALF-SPACE; CONTACT; SURFACES; TRIBOLOGY; BEHAVIOR; MODEL;
D O I：
10.1016/j.wear.2011.06.025
中图分类号：
TH [机械、仪表工业];
学科分类号：
0802 ;
摘要：
The onset of plastic yielding in a system of a sphere with a hard coating layer loaded by a rigid flat is studied using finite element analysis. The effect of coating thickness and material properties of both coating and substrate on the critical normal load, critical contact area and critical interference at the onset of plasticity is investigated. Three different locations where plastic yielding first occurs are found. A dimensionless coating parameter is defined, which allows optimization in terms of highest critical load. A possible weakening effect caused by using an ultra thin coating layer is revealed. (C) 2011 Elsevier B.V. All rights reserved.
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页码：2968 / 2977
页数：10
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