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research-article

A Simple Model for Scuffing Risk Evaluation of Point Contact under Mixed Lubrication

[+] Author and Article Information
Zhijian Wang

School of Mechatronics Engineering and Automation, Shanghai University, Shanghai, 200072
wzj10721180@163.com

Qingtao Yu

Beijing aviation manufacturing technology research institute, Beijing, 100024
yyqqtt@sina.com

Xuejin Shen

School of Mechatronics Engineering and Automation, Shanghai University, Shanghai, 200072
shenxj@t.shu.edu.cn

Xiaoyang Chen

School of Mechatronics Engineering and Automation, Shanghai University, Shanghai, 200072
xychen@mail.shu.edu.cn

1Corresponding author.

ASME doi:10.1115/1.4038410 History: Received May 03, 2017; Revised October 12, 2017

Abstract

This paper developed a point-contact mixed lubrication model, incorporating thermal effect, the asperity elasto-plastic deformation and the boundary film properties, to evaluate the relative severity of contact condition. Then based on the integrity of boundary films and the sharp increase of the friction coefficient, the possibility of the occurrence of scuffing was evaluated. The model was verified with published experimental data. A systematic parametric analysis was made to investigate the influences of surface roughness, contact geometry and the lubricant properties on contact performance. The results suggest that low surface roughness and high-quality boundary film can effectively improve the scuffing resistance under current operating conditions, while high-viscosity oil and large-radius curvature are not as much effective especially when the components work under high-sliding and high-temperature.

Copyright (c) 2017 by ASME
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