Heterogeneous structures with inhomogeneous inclusions under elastohydrodynamic lubrication contact with consideration of surface roughness

Qingbing Dong, Jing Yang, Xu Wang, Leon M. Keer, Kun Zhou*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

12 Scopus citations

Abstract

In order to predict the microscopic response of surface coatings and subsurface inhomogeneous inclusions, a semi-analytical solution is developed for heterogeneous materials subjected to elastohydrodynamic lubrication contact. In this solution, the inhomogeneous inclusions are homogenized according to Eshelby's equivalent inclusion method with unknown eigenstrains to be determined. The topmost coating is assumed as an inhomogeneous inclusion of finite size and thus simulated with the same methodology. The disturbed surface deformation due to the presence of coatings and inhomogeneous inclusions are iteratively introduced into the lubricant film thickness until a convergence is achieved. The effects of surface roughness on the pressure and film thickness profiles and subsurface elastic fields are considered to approach the engineering practice. This solution takes into account the interactions between the loading body, the fluid lubricant and the coating/substrate system with embedded inclusions.

Original languageEnglish (US)
Pages (from-to)571-582
Number of pages12
JournalProceedings of the Institution of Mechanical Engineers, Part J: Journal of Engineering Tribology
Volume230
Issue number5
DOIs
StatePublished - May 2016

Keywords

  • Elastohydrodynamic lubrication
  • coating
  • equivalent inclusion method
  • heterogeneous material
  • surface roughness

ASJC Scopus subject areas

  • Mechanical Engineering
  • Surfaces and Interfaces
  • Surfaces, Coatings and Films

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