FLUID FILM LUBRICATION WITH NONLINEAR FOUR-ELEMENT VISCOELASTIC FLUIDS (1ST AND 2ND REPORT).

Hirotsugu Hayashi, Jun Tomioka, Sanae Wada

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

The objective of this study is to establish an analysis of viscoelastic fluid film lubrication based on nonlinear four-element models, because oils lubricated with a large quantity of high molecular-weight polymers in order to improve the performance of lubricants indicate viscoelasticities as well as non-Newtonian behavior. In the first part of this paper it is made clear from the flow characteristics test that a viscoelastic behavior of such lubricants is expressed by a rheology equation of four-element model which consists of two nonlinear dashpots and two nonlinear springs. The second part applies the theory of Lubrication to parallel circular squeeze bearings, the effects of nonlinear viscoelastic characteristics on the film pressure of parallel circular squeeze bearings are clarified.

Original languageEnglish
Pages (from-to)1833-1847
Number of pages15
JournalNippon Kikai Gakkai Ronbunshu, C Hen/Transactions of the Japan Society of Mechanical Engineers, Part C
Volume52
Issue number478
Publication statusPublished - 1986 Jun
Externally publishedYes

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Bearings (structural)
Lubrication
Lubricants
Fluids
Viscoelasticity
Rheology
Molecular weight
Polymers

ASJC Scopus subject areas

  • Mechanical Engineering

Cite this

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abstract = "The objective of this study is to establish an analysis of viscoelastic fluid film lubrication based on nonlinear four-element models, because oils lubricated with a large quantity of high molecular-weight polymers in order to improve the performance of lubricants indicate viscoelasticities as well as non-Newtonian behavior. In the first part of this paper it is made clear from the flow characteristics test that a viscoelastic behavior of such lubricants is expressed by a rheology equation of four-element model which consists of two nonlinear dashpots and two nonlinear springs. The second part applies the theory of Lubrication to parallel circular squeeze bearings, the effects of nonlinear viscoelastic characteristics on the film pressure of parallel circular squeeze bearings are clarified.",
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AU - Wada, Sanae

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