Dynamic friction model of lubricated surfaces for precise motion control

A. Harnoy, B. Friedland

Research output: Contribution to journalArticlepeer-review

15 Scopus citations


A model is developed to describe dynamic friction effects in lubricated surfaces. The model covers the hydrodynamic, mixed and boundary lubrication regions. The dynamic friction model can predict the friction force for time-varying velocity, and is useful in precise motion control. The model presented is for a short journal bearing, but can be extended to other geometries of sliding surfaces, such as point and line contacts or rolling element bearings. The friction is related to a time variable fluid film thickness, resulting from journal vibrations relative to the sleeve. The proposed model agrees qualitatively with experimental results for lubricated line contact. Both show similar hysteresis-type friction curves under oscillating velocity.

Original languageAmerican English
Pages (from-to)608-614
Number of pages7
JournalTribology Transactions
Issue number3
StatePublished - Jul 1994

ASJC Scopus subject areas

  • Mechanics of Materials
  • Mechanical Engineering
  • Surfaces and Interfaces
  • Surfaces, Coatings and Films


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