Abstract
Full EHL line contact simulations have been carried out to obtain a new minimum film thickness formula pertaining to thin film EHL line contacts for Carreau-type shear-thinning lubricants. The present analysis uses Doolittle’s free volume based viscosity model with Tait’s equation to describe the density–pressure relationship. The load parameter ( W) used in the present simulations ranges from 2 × 10−5 to 5 × 10−4, while the piezo-viscous coefficient varies from 15 to 30 GPa −1 using different sets of Doolittle–Tait parameters. The curve-fitted values of minimum film thickness are found to conform well with the corresponding simulated values. Further, the present equation is shown to accurately capture the effect of increased scale and load sensitivities due to shear-thinning behavior.
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