The elastic properties of films in e.h.l. contacts
- 26 August 1980
- journal article
- Published by The Royal Society in Proceedings of the Royal Society of London. Series A. Mathematical and Physical Sciences
- Vol. 372 (1749) , 155-168
- https://doi.org/10.1098/rspa.1980.0107
Abstract
An optical elastohydrodynamic rig was constructed to measure the inwards radial force of a ball rolling on a plate. The axis of rotation of the ball could be set to give known amounts of side slip and spin. Hertz pressures up to 2 GPa could be achieved. Four fluids were used, a tractant, 5-phenyl 4 ether, a paraffinic cylinder stock and a highly refined synthetic hydrocarbon. It is shown that the film changes from a viscous to an elastic material the shear modulus and ultimate shear strength of which rise mostly linearly with pressure. Their ratio approaches 1/(2π) (as predicted by Frenkel’s theory (1926).This publication has 4 references indexed in Scilit:
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- An absolute high-pressure microviscometer based on refractive indexProceedings of the Royal Society of London. Series A. Mathematical and Physical Sciences, 1972
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