EHD film thickness in non-steady state contacts

J. Sugimura, W. R. Jones, H. A. Spikes

Research output: Contribution to journalArticle

81 Citations (Scopus)


This paper describes a study of EHD film thickness in non-steady state contact conditions. A modification of ultrathin film interferometry is employed which is able to measure both central film thickness and film thickness profiles 50 times a second. Film thickness with two perfiuoropolyethers and two mineral base oils are investigated in a number of different types of non-steady state motion, including acceleration/deceleration, stop/start and reciprocation. The results demonstrate a range of transient behaviors of EHD film whose thicknesses deviate from those in steady state conditions.

Original languageEnglish
Pages (from-to)442-452
Number of pages11
JournalJournal of Tribology
Issue number3
Publication statusPublished - Jul 1998

All Science Journal Classification (ASJC) codes

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

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