Analysis of the Accuracy of Mass Difference-Based Measurement of Dry Clutch Friction Material Wear
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Faculty of Mechanical Engineering and Naval Architecture Ivana Lučića 5, University of Zagreb, HR-10002 Zagreb, Croatia
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Ford-Werke GmbH, 50769 Cologne, Germany
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Author to whom correspondence should be addressed.
Academic Editors: Pawel Pawlus and Liaoliang Ke
Materials 2021, 14(18), 5356; https://doi.org/10.3390/ma14185356
Received: 8 July 2021
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Revised: 3 September 2021
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Accepted: 9 September 2021
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Published: 16 September 2021
(This article belongs to the Special Issue Tribology: Friction and Wear of Engineering Materials (Second Volume))
The paper demonstrates that the dry clutch friction plate wear rate, measured based on the plate mass difference method, exhibits a transient behavior after each change of friction interface temperature level. The effect is hypothesized to be caused by a temperature-dependent change in the moisture content/mass level in the friction material. To test this hypothesis, a series of synchronized characterization experiments have been conducted by using two friction plates, one for wear tests and the other for drying in an oven under the same temperature conditions. Based on the analysis of test results, a moisture content compensation procedure, which reduces the transient wear rate from being 100% to being 50% higher compared to stabilized wear rate, is proposed and verified. The gained insights are used to set recommendations on the organization of routine wear characterization experiments aimed at avoiding the effect of moisture content influence on the accuracy of wear measurement. The main recommendations are to minimize the number of temperature target level changes through proper design of the experiment, insert a run-in test after every long test pause, and execute a pre-heat, blind wear test at the beginning of each test day.
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Keywords:
dry clutch; experimental characterization; moisture influence; measurement; testing; wear
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MDPI and ACS Style
Hoić, M.; Miklik, A.; Kostelac, M.; Deur, J.; Tissot, A. Analysis of the Accuracy of Mass Difference-Based Measurement of Dry Clutch Friction Material Wear. Materials 2021, 14, 5356. https://doi.org/10.3390/ma14185356
AMA Style
Hoić M, Miklik A, Kostelac M, Deur J, Tissot A. Analysis of the Accuracy of Mass Difference-Based Measurement of Dry Clutch Friction Material Wear. Materials. 2021; 14(18):5356. https://doi.org/10.3390/ma14185356
Chicago/Turabian StyleHoić, Matija, Alen Miklik, Milan Kostelac, Joško Deur, and Andreas Tissot. 2021. "Analysis of the Accuracy of Mass Difference-Based Measurement of Dry Clutch Friction Material Wear" Materials 14, no. 18: 5356. https://doi.org/10.3390/ma14185356
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