FLUID FILM LUBRICATION WITH NONLINEAR FOUR-ELEMENT VISCOELASTIC FLUIDS (FLOW CHARACTERISTICS, A MODIFIED REYNOLDS EQUATION AND ITS APPLICATION TO PARALLEL CIRCULAR SQUEEZE BEARINGS).

Hirotsugu Hayashi, Jun Tomioka, Sanae Wada

    Research output: Contribution to journalArticle

    1 Citation (Scopus)

    Abstract

    The objective of this study is to establish an analytical procedure for viscoelastic fluid film lubrication based on a nonlinear four-element model, which should apply to lubricating oils containing a large quantity of high molecular-weight polymers. It is made clear from the flow characteristic test that the viscoelastic behavior of such lubricants is represented by a rheology equation based on a four-element model which consists of two nonlinear dashpots and two nonlinear springs. A modified Reynolds equation for finite-width bearings is derived by employing the nonlinear rheology equation. The effects of nonlinear viscoelastic characteristics on the film pressure are then studied with a parallel circular squeeze bearing, and it is shown that the experimental results agree well with the theoretical predictions.

    Original languageEnglish
    Pages (from-to)623-631
    Number of pages9
    JournalJSME International Journal
    Volume30
    Issue number262
    Publication statusPublished - 1987 Apr

    Fingerprint

    Bearings (structural)
    Reynolds equation
    Rheology
    Lubrication
    Flow of fluids
    Fluids
    Lubricating oils
    Lubricants
    Molecular weight
    Polymers

    ASJC Scopus subject areas

    • Engineering(all)

    Cite this

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    abstract = "The objective of this study is to establish an analytical procedure for viscoelastic fluid film lubrication based on a nonlinear four-element model, which should apply to lubricating oils containing a large quantity of high molecular-weight polymers. It is made clear from the flow characteristic test that the viscoelastic behavior of such lubricants is represented by a rheology equation based on a four-element model which consists of two nonlinear dashpots and two nonlinear springs. A modified Reynolds equation for finite-width bearings is derived by employing the nonlinear rheology equation. The effects of nonlinear viscoelastic characteristics on the film pressure are then studied with a parallel circular squeeze bearing, and it is shown that the experimental results agree well with the theoretical predictions.",
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    AU - Tomioka, Jun

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