Pressure-Temperature Viscosity Measurements and Simulations of Lubricants with Polymer Viscosity Modifiers

摘要

Viscosity typically measured at only ambient pressure at 40 and 100°C. However, in Elastohydrodynamic (EHL) contact, pressures are typically 1-3 GPa. This has a significant effect on the viscosity of the lubricant and consequently on the predication of the lubricant film thickness and frication [1]. An early exploration of high pressure-viscosity lubricants was performed by Bridgman. His result provided the first pressure-viscosity coefficient data that became utilized in EHL theory.