Research on Soft Three-body Contact of Rough Interface Mixed Lubrication Model

doi:10.3901/JME.2018.21.113

Abstract

Abstract: Soft three-body particle lubrication is the use of a large number of loose solid particles in the interface of the load and shear behavior to achieve low friction under special environment, so the study of the force of granular media friction interface in the shear process has great significance to the analysis of lubrication mechanism and the design of the lubrication device. In the study, the third-body granules are compared to fluid, a mixed lubrication model which contains large particles in rough interface is based on Reynolds equation, viscosity equation, Greenwood and Williamson contact model (G-W model) and so on. In this model, the total load and friction of the friction pair are composed of three parts:fluid, asperity and large granules. By using the finite difference method to solve the above physical model, the effects of the film thickness ratio, mass concentration, granular size, surface morphology and elastic modulus on the three-body contact interface of the load and friction are investigated, and the mechanical properties of the soft three-body contact interface are also analyzed by coupling the large granule size with the contact surface roughness. Based on the analysis of the mixed lubrication model, reasonable choices of large particle concentration, granular size, surface morphology of the specimen and elastic modulus helps to improve the load, reduce friction and make the soft three-body granular flow have better friction-reducing and lubrication performance.

Key words: friction, loading, mixed lubrication model, numerical simulation, three-body interface

CLC Number:

TH117

WANG Chao, KONG Junchao, WANG Wei. Research on Soft Three-body Contact of Rough Interface Mixed Lubrication Model[J]. Journal of Mechanical Engineering, 2018, 54(21): 113-119.

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