Effects of surface forces on pure squeeze thin film EHL motion of circular contacts

The pure squeeze thin film elastohydrodynamic lubrication (thin film EHL) motion of circular contacts with effects of surface forces taken into account is explored under constant load conditions. The difference between thin film EHL model and EHL model is apparent as the film thickness is thinner than 5 nm. The oscillation phenomena in pressure and film thickness come mainly from the action of solvation forces. The effects of surface forces become significant as the film thickness becomes thinner. Moreover, the viscosity is oscillatory due to its dependency on the hydrodynamic pressure which is affected by surface forces.

[1]  M. Teodorescu,et al.  Physics of ultra-thin surface films on molecularly smooth surfaces , 2006 .

[2]  Jérôme Molimard,et al.  Thin Film Colorimetric Interferometry , 2001 .

[3]  Liming Chang,et al.  An Efficient Calculation of the Load and Coefficient of Restitution of Impact Between Two Elastic Bodies With a Liquid Lubricant , 1996 .

[4]  Shizhu Wen,et al.  Pure squeeze action in an isothermal elastohydrodynamically lubricated spherical conjunction part 1. Theory and dynamic load results , 1991 .

[5]  Homer Rahnejat,et al.  Physics of lubricated impact of a sphere on a plate in a narrow continuum to gaps of molecular dimensions , 2002 .

[6]  A New Postulation of Viscosity and Its Application in Computation of Film Thickness in TFL , 2002 .

[7]  Homer Rahnejat,et al.  Ultra-thin lubricating films under transient conditions , 2001 .

[8]  Hugh Spikes,et al.  Boundary Film Formation by Lubricant Base Fluids , 1996 .

[9]  R. Larsson,et al.  Numerical Simulation of a Ball Impacting and Rebounding a Lubricated Surface , 1995 .

[10]  S. Wen,et al.  Thin film lubrication. Part I. Study on the transition between EHL and thin film lubrication using a relative optical interference intensity technique , 1996 .

[11]  Wang-Long Li,et al.  Elastohydrodynamic lubrication of circular contacts at pure squeeze motion with non-Newtonian lubricants , 2006 .

[12]  Derek Y. C. Chan,et al.  The drainage of thin liquid films between solid surfaces , 1985 .

[13]  Patricia McGuiggan,et al.  Liquid to solidlike transitions of molecularly thin films under shear , 1990 .

[14]  P. Wong,et al.  A simplified impact microviscometer , 1992 .

[15]  Stephen R. Brown,et al.  Closure of random elastic surfaces in contact , 1985 .

[16]  Rong-Tsong Lee,et al.  Squeeze and Entraining Motion in Nonconformal Line Contacts. Part II—Elastohydrodynamic Lubrication , 1989 .

[17]  Qu Qing-wen,et al.  An adsorbent layer model for thin film lubrication , 1998 .

[18]  H. I. Waterman,et al.  The Viscosity-Temperature-Pressure Relationship of Lubricating Oils and Its Correlation With Chemical Constitution , 1963 .

[19]  H. Cheng,et al.  The Pressure and Deformation Profiles Between Two Normally Approaching Lubricated Cylinders , 1973 .

[20]  J. Tichy.  A surface layer model for thin film lubrication , 1995 .

[21]  John A. Tichy.  A Porous Media Model for Thin Film Lubrication , 1995 .

[22]  J. Perram.  Hard sphere correlation functions in the Percus-Yevick approximation , 1975 .

[23]  A. Cameron,et al.  An absolute high-pressure microviscometer based on refractive index , 1972, Proceedings of the Royal Society of London. A. Mathematical and Physical Sciences.

[24]  Pure squeeze action in an isothermal elastohydrodynamically lubricated spherical conjunction part 2. Constant speed and constant load results , 1991 .

[25]  H. Christensen,et al.  Elastohydrodynamic Theory of Spherical Bodies in Normal Approach , 1970 .

[26]  J. Tichy.  Modeling of thin film lubrication , 1995 .

[27]  Duncan Dowson,et al.  An analysis of the normal bouncing of a solid elastic ball on an oily plate , 1994 .

[28]  P. L. Wong,et al.  The High Pressure Impact Microviscometer , 1992 .

[29]  R. Gohar,et al.  Pressure Distribution Under a Ball Impacting a Thin Lubricant Layer , 1986 .

[30]  J. Tichy,et al.  A scheme for hybrid molecular dynamics/finite element analysis of thin film lubrication , 1997 .

[31]  H. Matsuoka.  An Ultrathin Liquid Film Lubrication Theory. Calculation Method of Solvation Pressure and its Application to the EHL Problem , 1995 .