Friction-induced intermittent motion affected by surface roughness of brake friction materials
- Authors
- Lee, S. M.; Shin, M. W.; Jang, H.
- Issue Date
- 30-11월-2013
- Publisher
- ELSEVIER SCIENCE SA
- Keywords
- Stick-slip; Brake/clutch materials; Contact mechanics; Surface topography
- Citation
- WEAR, v.308, no.1-2, pp.29 - 34
- Indexed
- SCIE
SCOPUS
- Journal Title
- WEAR
- Volume
- 308
- Number
- 1-2
- Start Page
- 29
- End Page
- 34
- URI
- https://scholar.korea.ac.kr/handle/2021.sw.korea/101548
- DOI
- 10.1016/j.wear.2013.09.018
- ISSN
- 0043-1648
- Abstract
- 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.
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