An analytical model for the determination of rheological parameters of lubricants

A rheological model for the lubricant is necessary for a realistic predicti on of elastohydrodynamic (EHD) lubrication. It has now been accepted that t he Bair and Winer's or Johnson and Tevaawerk's rheological models are often preferable in analysis. Starting from these two rheological models, this p aper presents a quasi-empirical alternative method to determine some rheolo gical parameters such as: Ree-Eyring shear stress tau(0), limiting shear st ress tau(L) and sheer modulus G(infinity). The paper uses the experimental data from Ref. [1] and the analytical results obtained by using the propose d method are then compared with other computation methods from literature.