Comment on "History, Origins and Prediction of Elastohydrodynamic Friction, by Spikes and Jie in Tribology Letters" - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Tribology Letters Année : 2015

Comment on "History, Origins and Prediction of Elastohydrodynamic Friction, by Spikes and Jie in Tribology Letters"

Scott Bair
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Philippe Vergne
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  • PersonId : 839328
Kumar Punit
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  • PersonId : 966342
Poll Gerhard
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Krupka Ivan
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Hartl Martin
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Wassim Habchi
Larsson Roland
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Résumé

Progress in the classical field of EHL has for decades been paralyzed by the assumption that shear thinning should be indistinguishable from the shear dependence of the viscosity of a liquid heated by viscous dissipation and that the parameters of this simple shear dependence can be obtained from the shape of a friction curve. In the last few years, by abandoning this assumption and employing real viscosity measured with viscometers, there has been revolutionary progress in predicting film thickness and friction. Now, Spikes and Jie conclude that the previous assumption has as much merit as the use of viscosity measured in viscometers. This suggestion may be popular among those who wish to ignore viscometer measurements in favor of extracting properties from friction curves. However, within the subject article, there are numerous misstatements of fact and misrepresentations by omission, and the recent progress using real viscosity is not acknowledged. The debate has degenerated into a friction curve fitting competition which is not helpful. The great progress of the last few years would not have been possible using the concepts and methods espoused in this article.
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Dates et versions

hal-01150791 , version 1 (11-05-2015)

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Citer

Scott Bair, Philippe Vergne, Kumar Punit, Poll Gerhard, Krupka Ivan, et al.. Comment on "History, Origins and Prediction of Elastohydrodynamic Friction, by Spikes and Jie in Tribology Letters". Tribology Letters, 2015, 58 (1), pp.16. ⟨10.1007/s11249-015-0481-x⟩. ⟨hal-01150791⟩
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