EFFECT OF ROUGHNESS AND SLIDING FRICTION ON CONTACT STRESSES

被引:68
作者
BAILEY, DM [1 ]
SAYLES, RS [1 ]
机构
[1] IMPERIAL COLL SCI TECHNOL & MED,DEPT MECH ENGN,LONDON SW7,ENGLAND
来源
JOURNAL OF TRIBOLOGY-TRANSACTIONS OF THE ASME | 1991年 / 113卷 / 04期
关键词
D O I
10.1115/1.2920686
中图分类号
TH [机械、仪表工业];
学科分类号
0802 ;
摘要
The stress distributions associated with smooth surfaces in contact are rarely experienced in practice. Factors such as surface roughness, lubricant films, and third body particulates are known to influence the state of stress and the resulting rolling contact fatigue life. This paper describes a numerical technique for evaluating the complete subsurface field of stress resulting from the elastic contact of nonconforming rough bodies, based on measurements of their profile. The effect of sliding friction is included. The presence of asperities within the contact region gives rise to high shear stresses near the surface. Realistic coefficients of friction for lubricated sliding contacts (i.e., mu almost-equal-to 0.1) causes the "smooth body" shear stresses to interact with the asperity stresses to produce a large, highly stressed region exposed to the surface. The significance of these near-surface stresses is discussed in relation to modes of surface distress which lead to eventual failure of the contacting surfaces.
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页码:729 / 738
页数:10
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