The Effect of Nonlinear Viscoelasticity of Lubricants on Piston Ring Lubrication

Jun Tomioka, Hirotsugu Hayashi, Sanae Wada

研究成果: Article査読

抄録

In recent years, engine oils have contained various kinds of additives such as high molecular-weight polymers to improve their performance. Such lubricants exhibit viscoelastic behavior, but the lubricants were assumed to be Newtonian fluids in most of the previous investigations on piston ring lubrication. The objective of this paper is to theoretically clarify the effect of nonlinear viscoelasticity of lubricants on piston ring lubrication by introducing a nonlinear four-element viscoelastic model which consists of two nonlinear dashpots and two nonlinear springs. Numerical solutions show that the effect of viscoelasticity reduces the frictional force and the film thickness. In addition, the phase of the variations of the frictional force and the film thickness of viscoelastic fluids is delayed compared with that of Newtonian fluids.

本文言語English
ページ(範囲)2058-2065
ページ数8
ジャーナルTransactions of the Japan Society of Mechanical Engineers Series C
57
538
DOI
出版ステータスPublished - 1991
外部発表はい

ASJC Scopus subject areas

  • Mechanics of Materials
  • Mechanical Engineering
  • Industrial and Manufacturing Engineering

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