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Numerical simulation of a ball impacting and rebounding a lubricated surface
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Machine Elements.ORCID iD: 0000-0001-9110-2819
1995 (English)In: Journal of tribology, ISSN 0742-4787, E-ISSN 1528-8897, Vol. 117, no 1, p. 94-102Article in journal (Refereed) Published
Abstract [en]

The case of a ball bouncing on a flat surface covered by a thin lubricant layer is analyzed theoretically. Both impact and rebound are studied. A Newtonian lubricant and perfect elastic solids are assumed. As long as the ball approaches the flat surface the pressure in the contact increases and a lubricant entrapment is formed at the center of the contact. When the ball begins to leave the surface, cavitation occurs. At the periphery of the contact a pressure spike is formed. Just before the ball leaves the lubricated surface, very high pressure values arise at and near the contact center. These results are compared with the case of nonlubricated impact. It is found that the pressure in the contact at lubricated impact is higher than in the case of dry impact. Due to the elastic and damping properties of the lubricant film and the impacting surfaces, a time delay is observed between the time of maximum impact force and minimum film thickness. Comparing the theoretical results with experimental results, presented by other authors, shows good correlations.

Place, publisher, year, edition, pages
1995. Vol. 117, no 1, p. 94-102
National Category
Tribology (Interacting Surfaces including Friction, Lubrication and Wear)
Research subject
Machine Elements
Identifiers
URN: urn:nbn:se:ltu:diva-5596DOI: 10.1115/1.2830614ISI: A1995QD52600015Scopus ID: 2-s2.0-0029140105Local ID: 3bbdf6a0-c0f4-11db-834c-000ea68e967bOAI: oai:DiVA.org:ltu-5596DiVA, id: diva2:978470
Note
Godkänd; 1995; Bibliografisk uppgift: Även presenterad i Proceedings of 1994 ASME/STLE Tribology Conference, Maui, USA; 20070202 (cira)Available from: 2016-09-29 Created: 2016-09-29 Last updated: 2018-07-10Bibliographically approved

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Larsson, RolandHöglund, Erik

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