Publication detail

The Effect of Load (Pressure) for Quantitative EHL Film Thickness

KŘUPKA, I. HARTL, M. BAIR, S. KUMAR, P. KHONSARI, M.M.

Czech title

Vliv tlaku (zatížení) na tloušťku EHD mazacího filmu

English title

The Effect of Load (Pressure) for Quantitative EHL Film Thickness

Type

journal article - other

Language

en

Original abstract

New quantitative numerical simulations of the elastohydrodynamic lubrication (EHL) film thickness using realistic pressure and shear-dependent rheology and realistic compressibility have indicated that the dependence of central film thickness upon Hertz pressure (or load) for the classic Newtonian, slightly compressible solution is merely a lower limit with magnitudes three times as great being possible. Experimental measurements of central film thickness employing Hertz pressures from 1.0 to 2.6 GPa confirm that for a neat mineral oil, the classical pressure dependence is accurate, while for two gear oils the experimental pressure dependence is much larger.

Czech abstract

Článek shrnuje výsledky experimentálního ověření vlivu tlaku (zatížení) na tloušťku elastohydrodynamického mazacího filmu při použití newtonských i nenewtonských maziv.

English abstract

New quantitative numerical simulations of the elastohydrodynamic lubrication (EHL) film thickness using realistic pressure and shear-dependent rheology and realistic compressibility have indicated that the dependence of central film thickness upon Hertz pressure (or load) for the classic Newtonian, slightly compressible solution is merely a lower limit with magnitudes three times as great being possible. Experimental measurements of central film thickness employing Hertz pressures from 1.0 to 2.6 GPa confirm that for a neat mineral oil, the classical pressure dependence is accurate, while for two gear oils the experimental pressure dependence is much larger.

Keywords in Czech

Elastohydrodynamické mazání; Tloušťka filmu; Reologie; Stlačitelnost

Keywords in English

Elastohydrodynamic; Film thickness; EHL; Rheology; Compressibility

RIV year

2009

Released

19.12.2009

Publisher

Springer

ISSN

1023-8883

Journal

Tribology Letters

Volume

34

Number

X

Pages from–to

1–10

Pages count

10

BIBTEX


@article{BUT47124,
  author="Ivan {Křupka} and Martin {Hartl},
  title="The Effect of Load (Pressure) for Quantitative EHL Film Thickness",
  journal="Tribology Letters",
  year="2009",
  volume="34",
  number="X",
  month="December",
  pages="1--10",
  publisher="Springer",
  issn="1023-8883"
}