EHL line contact central and minimum film thickness equations for lubricants with linear piezoviscous behavior

Full EHL line contact simulations for smooth surfaces are carried out under fully flooded condition to obtain central and minimum film thickness equations pertaining to lubricants with linear piezoviscous response. The present analysis is based upon the assumptions of isothermal condition and Newtonian fluid model. A major drop in the sensitivity of pressure viscosity coefficient (and hence, the material parameter G) is observed. The exponent of the speed parameter U is marginally smaller while that of load parameter is slightly increased. There is close agreement between the simulated and fitted film thickness values.

► EHL line contact simulations with isothermal Newtonian fluid model are carried out.
► Lubricants like L7808 and L23699 with linear piezoviscosity are considered.
► Central and minimum film thickness equations have been developed.
► A major drop in the sensitivity of pressure viscosity coefficient is observed.
► Good agreement is found between the simulated and curve-fitted film thickness values.