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Open AccessArticle

On the Simulation of the Micro-Contact of Rough Surfaces Using the Example of Wet Friction Clutch Materials

1
Gear Research Centre (FZG), Technical University of Munich, 85748 Garching, Germany
2
Engineering Design (KTmfk), Friedrich-Alexander-Universität Erlangen-Nürnberg, 91058 Erlangen, Germany
*
Author to whom correspondence should be addressed.
Lubricants 2019, 7(5), 41; https://doi.org/10.3390/lubricants7050041
Received: 27 February 2019 / Revised: 30 April 2019 / Accepted: 7 May 2019 / Published: 14 May 2019
Friction behavior in a sliding contact is strongly influenced by the surface topography of the bodies in contact. This also applies to friction clutches. Even small differences in surface topography may cause significant differences in friction behavior. Thus, it is important to be able to characterize the micro-contact of the rough sliding surfaces, which are, in the case of a clutch, steel plate and friction material. One important measure for the characterization of the micro-contact is the real area of contact. Another important aspect is the contact pattern. The article introduces a method to implement a FEM (Finite Element Method) model from real surface measurements. Real surface topography of the friction pairing is considered. The simulation method is applied to different friction pairings and operating conditions. Computational results with rough and smooth steel plates, new and run-in friction linings, and different nominal surface pressure verify the model. In addition, the results on real area of contact between a steel and a friction plate are compared with published values. View Full-Text
Keywords: micro-contact; real area of contact; contact pattern; FEM simulation; wet friction clutch; rough surfaces; topography; running-in micro-contact; real area of contact; contact pattern; FEM simulation; wet friction clutch; rough surfaces; topography; running-in
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MDPI and ACS Style

Voelkel, K.; Rothemund, M.; Albarracin Garibello, S.; Kramer, V.; Pflaum, H.; Stahl, K. On the Simulation of the Micro-Contact of Rough Surfaces Using the Example of Wet Friction Clutch Materials. Lubricants 2019, 7, 41.

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