Time-Temperature-Pressure Superposition in Polymer Thickened Liquid Lubricants
The study of elastohydrodynamic lubrication (EHL) has evolved rapidly in the last few years through the incorporation of realistic rheology, obtained from viscometers, into EHL analysis. Discoveries can now be made through analysis before experimental observation. The time‐temperature pressure superposition (TTPS) principle, or the method of reduced variables, is an essential part of the new quantitative elastohydrodynamics where the temporary shear dependence of the viscosity or shear‐thinning of the liquid must be known.