An Investigation of Traction in Elastohydrodynamic Point Contacts Using Optical Interferometry
- 1 January 1975
- journal article
- research article
- Published by Taylor & Francis in A S L E Transactions
- Vol. 18 (3) , 222-228
- https://doi.org/10.1080/05698197508982764
Abstract
A new optical EHD machine is described which allows traction to be applied while measuring the film thickness. A range of 13 pure fluids with well characterized physical properties was studied. A convenient way of plotting friction coefficient f against slide/roll ratio Σ was found to be log (1 - f/fmax)˜Σ as linear plots are achieved. The value of the peak friction coefficient fmax varied between 0.011 and 0.09. The glass transition temperature gave the best correlation with this, though not a very satisfactory one, and the pressure viscosity coefficient was next best.Keywords
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