Published: Jan 1977
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Theoretical analysis supported by specially designed experiments show that the viscosity loss of polymer thickened oils is basically a time dependant phenomenon. Depending on the value of the residence time of the oil in the contact and on the critical degradation time corresponding to the shear severity, it is possible to describe the case of EHD contacts such as gears and HD contacts such as plain bearings.
The results have theoretical and practical consequences. In particular the viscosity in EHD contacts could be much lower than usually supposed. A better understanding of mechanical shear is expected from the proposed approach.
du Parquet, JPR
Compagnie Francaise de Raffinage, Total Technique, Centre de Recherches,