New minimum film thickness formula for EHL rolling/sliding line contacts considering shear thinning behavior

• DOI: 10.1177/1350650112462173
• Publication Date: 2012-10-26T03:43:38Z
• Authors: Parinam Anuradha; Punit Kumar
• Keywords: Shear thinning; Thinning; Line (geometry)

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