Table of Contents
ISRN Tribology
Volume 2013 (2013), Article ID 607279, 11 pages
Research Article

Friction Behavior of a Wet Clutch Subjected to Accelerated Degradation

1Flanders’ Mechatronics Technology Centre (FMTC), Celestijnenlaan 300D, 3001 Heverlee, Belgium
2Division PMA, Department of Mechanical Engineering, Katholieke Universiteit Leuven (KU Leuven), Celestijnenlaan 300B, 3001 Heverlee, Belgium

Received 19 November 2012; Accepted 10 December 2012

Academic Editors: D. Das, M. Dienwiebel, and J. Wang

Copyright © 2013 Agusmian Partogi Ompusunggu et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


This study aims at experimentally investigating the sliding friction characteristics of a wet clutch during its lifetime. More precisely, the objective is to understand how the Stribeck and the frictional lag (i.e, sliding hysteresis) parameters evolve as the clutch degradation progresses. For this purpose, a novel test procedure has been proposed and a set of experiments has been carried out on a fully assembled (commercial) clutch using a modified SAE#2 test setup. Furthermore, a systematic methodology for the Stribeck and the frictional lag parameters identification is developed. Regardless of the applied pressure, it appears that the first three identified Stribeck parameters tend to decrease with the progression of the degradation, while the last parameter tends to increase. In regard to the frictional lag parameter, the trend shows pressure dependency.