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TECHNICAL PAPERS

Microcontact Model for Paper-Based Wet Friction Materials

[+] Author and Article Information
H. Gao, G. C. Barber

Department of Mechanical Engineering, Oakland University, Rochester, MI 48309

J. Tribol 124(2), 414-419 (Jun 12, 2001) (6 pages) doi:10.1115/1.1430674 History: Received December 08, 2000; Revised June 12, 2001
Copyright © 2002 by ASME
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References

Greenwood,  J., and Williamson,  J., 1966, “Contact of Nominally Flat Surfaces,” Proc. R. Soc. London, Ser. A, 295, pp. 300–319.
Archard, J. F., 1974, “Surface Topography and Tribology,” Tribol. Int., pp. 213–220.
McCool,  J. I., 1987, “Relating Profile Instrument Measurements to the Functional Performance of Rough Surfaces,” ASME J. Tribol., 109, pp. 264–270.
McCool,  J. I., 1986, “Comparison of Models for the Contact of Rough Surfaces,” Wear, 107, pp. 37–60.
McCool,  J. I., 2000, “Extending the Capability of the Greenwood Williamson Microcontact Model,” ASME J. Tribol., 122, pp. 496–502.
Kucharski,  S., Klimczak,  T., Polijaniuk,  A., and Kaczmarek,  J., 1994, “Finite-Element Model for the Contact of Rough Surfaces,” Wear, 177, pp. 1–13.
Chang,  W. R., Etsion,  I., and Bogy,  D. B., 1987, “An Elastic-Plastic Model for the Contact of Rough Surfaces,” ASME J. Tribol., 109, pp. 257–263.
Berger,  E. J., Sadeghi,  F., and Krousgrill,  C. M., 1996, “Finite Element Modeling of Engagement of Rough and Grooved Wet Clutches,” ASME J. Tribol., 118, pp. 137–146.
Jang,  J. Y., and Khonsari,  M. M., 1999, “Thermal Characteristics of a Wet Clutch,” ASME J. Tribol., 121, pp. 610–617.
Berger,  E. J., Sadeghi,  F., and Krousgrill,  C. M., 1997, “Analytical and Numerical Modeling of Engagement of Rough, Permeable, Grooved Wet Clutches,” ASME J. Tribol., 119, pp. 143–148.
Natsumeda,  S., and Miyoshi,  T., 1994, “Numerical Simulation of Engagement of Paper Based Wet Clutch Facing,” ASME J. Tribol., 116, pp. 232–237.
Willermet, P. A., 1998, “Topics in Transmission Tribology,” Proceedings of STLE Annual Meeting, Detroit, MI, May 17–21.

Figures

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Typical surface topography of new wet friction material with Rsk=−0.36,σ=7.87 μm: (a) optical photograph; and (b) surface profile.
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Typical surface topography of glazed wet friction material with Rsk=−0.98,σ=3.15 μm: (a) optical photograph; and (b) surface profile.
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Schematic of relationship between film thickness and asperity height
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Contact area ratios of symmetric random topography Rsk=0,σ=6.0 μm
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Contact area ratios of positive skewness topography Rsk=1,σ=6.0 μm
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Contact area ratios of negative skewness topography Rsk=−1,σ=6.0 μm
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Comparison of contact area ratios for new, run-in and glazed wet friction materials: (a) Gaussian distribution; and (b) Weibull distribution.
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Mesh model of deformed asperity

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