Assessment of Wear Characteristics of Paper-Based Wet Friction Materials
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A wet clutch synchronizes the speed and transmits power from an engine or motor to a drive train by mechanical coupling between a friction disk and a separate disk. The performance of a wet clutch may be significantly dependent on the friction and wear characteristics of paper-based friction materials. In this work, the wear characteristics of paper-based friction materials were experimentally investigated using a pin on reciprocating plate tribo-tester. In particular, the wear characteristics of paper-based friction materials with and without carbon fibers were assessed in a boundary lubrication state with respect to normal force and sliding speed. The tests found that the wear rate of paper-based friction materials increased with increasing normal force and sliding speed. The wear rates were found to vary in the range of 10-6-10-4 mm3/(N·cycle). In addition, paper-based friction material with carbon fiber exhibited relatively larger friction and wear characteristics than those without carbon fibers. It was observed that the carbon fibers were broken due to the sliding contact, which may have contributed to the wear progression. The outcomes of this work may be helpful in gaining a better understanding of the tribological characteristics of paper-based friction materials in order to enhance the lifetimes of wet clutches.
KeywordsCarbon fiber Friction Wear rate Wet clutch
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- 1.Lam, R. C., Chavdar, B., and Newcomb, T., “New Generation Friction Materials and Technologies,” SAE Technical Paper, No. 2006-01-0150, 2006.Google Scholar
- 3.Berglund, K., Marklund, P., Larsson, R., Pach, M., and Olsson, R., “Wet Clutch Degradation Monitored by Lubricant Analysis,” SAE Technical Paper, No. 201-01-2232, 2010.Google Scholar
- 5.Devlin, M. T., Tersigni, S. H., Senn, J., Turner, T. L., Jao, T.-C., and Yatsunami, K., “Effect of Friction Material on the Relative Contribution of Thin-Film Friction to Overall Friction in Clutches,” SAE Technical Paper, No. 2004-01-3025, 2004.Google Scholar
- 6.Fujii, Y., Snyder, T., Waldecker, R., Tobler, W., Davis, L., Scherzer, M., and Zander, D., “Dynamic Characterization of Wet Friction Component under Realistic Transmission Shift Conditions,” SAE Technical Paper, No. 2006-01-0151, 2006.Google Scholar
- 14.Mäki, R., Nyman, P., Olsson, R., and Ganemi, B., “Measurement and Characterization of Anti-Shudder Properties in Wet Clutch Applications,” SAE Technical Paper, No. 2005-01-0878, 2005.Google Scholar
- 23.Fei, J., Li, H.-J., Qi, L.-H., Fu, Y.-W., and Li, X.-T., “Carbon-Fiber Reinforced Paper-Based Friction Material: Study on Friction Stability as a Function of Operating Variables,” Journal of Tribology, Vol. 130, No. 4, Paper No. 041605, 2008.Google Scholar
- 25.Rabinowicz, E., “Friction and Wear of Materials,” John Wiley & Sons, 1995.Google Scholar