EHD film thickness in non-steady state contacts

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

    Research output: Contribution to journalArticlepeer-review

    90 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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