FRICTION AND LUBRICATION.

Friction and Lubrication

FRICTION AND LUBRICATION in sheet metal forming are influenced by such parameters as material properties, surface finish, temperature, sliding velocity, contact pressure, and lubricant characteristics. The parameters that affect friction and lubrication are schematically shown in Fig. 7.1. Depending on these parameters, the performance of a lubricant and the coefficient of friction (COF) vary. ...

Friction Force for Boundary Lubrication

A thermodynamic model describing the phase transition of first order between structure states of lubricant material in the boundary friction regime is proposed. It is shown that lubricant melts with temperature increase or at shear of rubbing surfaces if the elastic strain (stress) exceeds the critical value. The phase diagram with domains of dry and sliding friction is constructed. The depende...

JULY isss LUBRICATION : FACTS AND FRICTION

Friction Control in Thin-Film Lubrication

A novel method is proposed for controlling and reducing friction in thin-film boundary lubricated junctions, through coupling of small amplitude (of the order of 1 Å) directional mechanical oscillations of the confining boundaries to the molecular degrees of freedom of the sheared interfacial lubricating fluid. Extensive grandcanonical molecular dynamics simulations revealed the nature of dynam...

Self-sustained lift and low friction via soft lubrication

Baudouin Saintyves, Théo Jules, 2 Thomas Salez, 3 and L. Mahadevan ∗ Paulson School of Engineering and Applied Sciences, Harvard University, Cambridge, MA 02138, USA Département de Physique, ENS, PSL Research University, 75005 Paris, France PCT Lab, UMR CNRS 7083 Gulliver, ESPCI Paris, PSL Research University, 75005 Paris, France Paulson School of Engineering and Applied Sciences, Department of...