Effect of asperity interactions on rough surface elastic contact behavior: Hard film on soft substrate

Chang Dong Yeo, Raja R. Katta, Jungkyu Lee, Andreas A. Polycarpou

Research output: Contribution to journalArticle

28 Scopus citations

Abstract

An improved elastic micro-contact model of rough surfaces accounting for asperity interactions is proposed. The contact behavior of a single asperity system is composed of a stiffer hemi-spherical asperity deformation and bellowing softer substrate deformation, which is then extended to rough surface contact including asperity interactions. Using the solution of substrate deformation, normal positions of individual asperities are adjusted during quasi-static contact, from which surface interactive forces are obtained. Analytical simulations are performed using the proposed rough surface contact model, whose results are compared to Greenwood-Williamson-based models and with experimental measurements.

Original languageEnglish
Pages (from-to)1438-1448
Number of pages11
JournalTribology International
Volume43
Issue number8
DOIs
StatePublished - Aug 2010

Keywords

  • Asperity interactions
  • Coating
  • Contact mechanics
  • Surface roughness

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