Central film thickness formula for shear thinning lubricants in EHL point contacts under pure rolling

作者：Katyal Puneet^*; Kumar Punit

来源：Tribology International, 2012, 48: 113-121.

DOI：10.1016/j.triboint.2011.11.007

• EHL
• Shear thinning
• Point contact
• Film thickness formula

Based upon an extensive set of full EHL point contact simulations, this paper offers a central film thickness formula pertaining to shear-thinning lubricants with Carreau-type behavior. In order to develop a more generic and accurate version of film thickness formula, a recent work is extended by carrying out the simulations for widely varying operating loads and piezo-viscous coefficients along with the more realistic Doolittle's free volume based pressure-viscosity model. This equation is found to conform very well with the published experimental data for EHL lubricants with widely varying rheological and piezo-viscous behaviors, i.e., polyalpha olefins and polydimethyl siloxane.

• 出版日期2012-4