In this paper, the combined effects of characteristic size and concentration inorganic fullerene-like tungsten disulphide nanoparticles (IF-WS 2 NPs) or molybdenum (IF-MoS on nonlinear dynamic behaviour a gasoline engine crankshaft bearing subject to an arbitrary force torsor (effective applied moment vector) are theoretically numerically investigated using V. K. Stokes micro-continuum theory. ...

The surface roughness of two contacting surfaces significantly influences the tribological performance mechanical elements. Their impression is more pronounced under mixed elasto-hydrodynamic lubrication condition. cam and flat follower mechanism a typical sample in which adverse conditions, including direct boundary interactions occurs. In this study, effects on friction force coefficient are ...

The impact of start-stops on the thickness lubricating films in Elasto-Hydrodynamic Lubrication (EHL) contacts grease lubricated rolling bearings is different from that oil bearings. This paper shows film drops to zero quickly due absence hydrodynamic effects during a stop. It increases an unexpected large value when bearing stopped for long time and started up again, although this only lasts v...

An average Reynolds equation is proposed for predicting the effects of deterministic periodic roughness, taking JFO mass flow preserving cavitation model and elastohydrodynamic effects into account. For this, the asymptotic model is based upon double scale analysis approach. The average Reynolds equation can be used both for microscopic interasperity cavitation and macroscopic one. The validity...

A full numerical methodology was developed for the elasto-hydrodynamic lubrication analysis of hip joint implants for the lubrication problem in spherical and conformal contacts. Typical results of a metal-on-metal hip implant were obtained to illustrate the applicability of the numerical methodology developed in the present study. INTRODUCTION The important effect of lubrication on long-term s...