Transient elastohydrodynamic limiting shear behaviour related to molecular interaction

Validerad; 2005; 20080327 (cira)
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.

Andersson, OveUmeå universitet,Institutionen för fysik,Department of Physics, Umeå University, Umeå, Sweden(Swepub:umu)ovan0001 (författare)
Holweger, W.NMI, Naturwissenschaftliches und Medizinisches Institut an der Universität Tübingen, Reutlingen, Germany (författare)
Luleå tekniska universitetInstitutionen för fysik (creator_code:org_t)

Ingår i:Tribology letters: Springer Science and Business Media LLC20:3-4, s. 255-2621023-88831573-2711

Av författaren/redakt...: Åhrström, Bert-O ...; Andersson, Ove; Holweger, W.

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