Friction-induced intermittent motion affected by surface roughness of brake friction materials

被引：25
|
作者：
Lee, S. M. [1 ]
Shin, M. W. [1 ]
Jang, H. [1 ]
机构：
[1] Korea Univ, Dept Mat Sci & Engn, Seoul 136713, South Korea
来源：
WEAR | 2013年 / 308卷 / 1-2期
关键词：
Stick-slip; Brake/clutch materials; Contact mechanics; Surface topography; STICK-SLIP; CONTACT STIFFNESS;
D O I：
10.1016/j.wear.2013.09.018
中图分类号：
TH [机械、仪表工业];
学科分类号：
0802 ;
摘要：
The effect of the surface roughness of the brake friction material on friction-induced instability was studied. Commercial friction materials with different surface roughness levels were tested using a scale brake dynamometer to find a correlation between the surface roughness and friction oscillation. The results showed that the normal contact stiffness was strongly affected by surface roughness and played a significant role in determining the friction oscillation pattern. The friction force oscillation changed from stick-slip to sinusoidal oscillation and steady sliding as the sliding velocity increased, and the velocity ranges for different oscillatory patterns were changed by the surface roughness. A smooth surface with glazed patches produced friction oscillation with larger amplitudes, and the oscillation was maintained over a wider range of sliding velocities due to the high contact stiffness. The correlation between the contact stiffness and surface roughness suggested that friction-induced instability might be avoided by designing the friction material to have low surface stiffness. (C) 2013 Elsevier B.V. All rights reserved.
引用
收藏
页码：29 / 34
页数：6
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