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Transient elastohydrodynamic limiting shear behaviour related to molecular interaction
Luleå University of Technology.
Department of Physics, Umeå University, Umeå, Sweden.
NMI, Naturwissenschaftliches und Medizinisches Institut an der Universität Tübingen, Reutlingen, Germany.
2005 (English)In: Tribology letters, ISSN 1023-8883, E-ISSN 1573-2711, Vol. 20, no 3-4, p. 255-262Article in journal (Refereed) Published
Abstract [en]

Previous studies have revealed that friction behave in unexpected ways as pressure increase in a lubricating film. It has been determined that it is not a viscosity-related but rather originating directly from molecular structure. This study strives to elucidate the importance of understanding the properties that govern friction, when undertaking simulation of elastohydrodynamic events. A thorough investigation of the maximum transferable shear stress in the film for a paraffinic mineral oil has been undertaken. A previously stated theory of decreasing friction coefficient with increasing pressure is further substantiated by the current measurements. Classical thermodynamics, in the shape of transient "hot-wire" measurements, have been used to study macro-molecular changes (as function of pressure). The instance of global relaxation correlates nicely to measurements.

Place, publisher, year, edition, pages
2005. Vol. 20, no 3-4, p. 255-262
National Category
Tribology (Interacting Surfaces including Friction, Lubrication and Wear)
Research subject
Machine Elements
Identifiers
URN: urn:nbn:se:ltu:diva-11084DOI: 10.1007/s11249-005-9065-5ISI: 000234026200009Scopus ID: 2-s2.0-31144454863Local ID: 9fe60aa0-fc0d-11dc-a946-000ea68e967bOAI: oai:DiVA.org:ltu-11084DiVA, id: diva2:984033
Note

Validerad; 2005; 20080327 (cira)

Available from: 2016-09-29 Created: 2016-09-29 Last updated: 2022-01-20Bibliographically approved

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Åhrström, Bert-Olof

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