We present a novel approach for the simulation of dynamic friction in engineering systems, based on a new surface asperity model including creep effects. Our novel friction model aims at understanding the link between the microscopic origins of friction dynamics and the response of the engineering-level friction induced vibrations. The approach is based on the assumption that the time- and velocity-dependent friction coefficient is mainly caused by creep growth of surface asperity contacts (microscopic contact patches between two rough surfaces) as proposed by Kragelskii, Rabinowicz, Scholz and others. At the heart of our approach is a new asperity model that includes creep effects. Based on the pioneering work of Etsion et al., we conducted extensive FEM simulations to analyze the creep behavior of an elastic-perfectly plastic hemisphere in contact with a rigid flat. The new asperity model is used as a building block for a fractal model for the contact between rough surfaces. The model yields the time- and velocity-dependent macroscopic friction coefficient. We demonstrate the practical applicability of the new dynamic friction model in a simple block-on-conveyor test case to analyze friction induced vibrations.
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ASME 2008 9th Biennial Conference on Engineering Systems Design and Analysis
July 7–9, 2008
Haifa, Israel
Conference Sponsors:
- International
ISBN:
978-0-7918-4837-1
PROCEEDINGS PAPER
A Novel Dynamic Friction Model Based on Asperity Creep
Andreas Goedecke,
Andreas Goedecke
Johannes Kepler University of Linz, Linz, Austria
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Randolf Mock
Randolf Mock
Siemens AG Corporate Technology, Munich, Germany
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Andreas Goedecke
Johannes Kepler University of Linz, Linz, Austria
Randolf Mock
Siemens AG Corporate Technology, Munich, Germany
Paper No:
ESDA2008-59366, pp. 475-484; 10 pages
Published Online:
July 6, 2009
Citation
Goedecke, A, & Mock, R. "A Novel Dynamic Friction Model Based on Asperity Creep." Proceedings of the ASME 2008 9th Biennial Conference on Engineering Systems Design and Analysis. Volume 3: Design; Tribology; Education. Haifa, Israel. July 7–9, 2008. pp. 475-484. ASME. https://doi.org/10.1115/ESDA2008-59366
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