Elastohydrodynamic lubrication in point contact on the surfaces of particle-reinforced composite

Abstract

Appreciable friction and serious wear are common challenges in the operation of advanced manufacturing equipment, and friction pairs may be susceptible to damage even with oil lubrication when point contact exists. In this study, a type of particle-reinforced composite material is introduced for one of the components of a heavy-load contact pair, and the performance improvement of elastohydrodynamic lubrication (EHL) is analyzed considering the rheological properties of non-Newtonian fluids. The Ree–Eyring EHL model is used considering the surface of the particle-reinforced composite, in which the film thickness includes the particle-induced elastic deformation. The problem of inclusions with different eigenstrains is solved by using Galerkin vectors. The influences of particle properties, size, burial depth, and interparticle distance on point-contact EHL are investigated. Furthermore, using several cases, the structural parameters of the particles in the composites are optimized, and an appropriate parameter range is obtained with the goal of reducing friction. Finally, the results for the EHL traction coefficient demonstrate that appropriate particle properties, size, burial depth, and interparticle distance can effectively reduce the traction coefficient in heavy-load contact.

Analysis of Line Contact Elastohydrodynamic Lubrication with the Particles under Rough Contact Surface

“…e eigenstrains are positive if the inhomogeneous inclusions are harder than the matrix, otherwise they are negative. In this study, the eigenstrains are expressed in one-dimensional form e � [e 11 , e 22 , 2e 12 ].…”

“…Zhao et al proposed an approach to determine the lubrication performance of the soft EHL of heterogeneous materials [11]. Chen et al tried to obtain the best lubrication performance of EHL to optimize the related parameters of inhomogeneous materials [12].…”

Numerical Solution of Elastohydrodynamic Lubrication for Sliding/Rolling Bearing for Non-newtonian Lubricant

“…Applying the above non-dimensionless variables to the Reynold-Eyring equation becomes and assuming the rolling speed U m =V m in the x and y direction is the same we have, The boundary conditions in accordance to [18] are given by…”

Theoretical analysis of a rolling-sliding elastohydrodynamic lubrication line contact with a subsurface inclusion

“…The effect of size, position, and stiffness of cuboidal inclusions on EHL traction has recently been investigated by Chen et al. 21 highlighting a surface dimple-like effect when the inclusions are softer than the matrix.…”

“…And also by Dong et al, 19,20 who in addition considered the combined effect of inclusions and surface roughness in the form of waviness. The effect of size, position, and stiffness of cuboidal inclusions on EHL traction has recently been investigated by Chen et al 21 highlighting a surface dimplelike effect when the inclusions are softer than the matrix.…”