Publication detail

Effect of surface dents on contact pressure in elastohydrodynamic contacts

KŘUPKA, I. HARTL, M. VRBKA, M. VAVERKA, M. POLIŠČUK, R.

Original Title

Type

journal article - other

Language

English

Original Abstract

Nowadays film thickness measurement techniques can provide precise data for the detailed studies of the behaviour of lubricated contacts including transient operational conditions. Contact pressure is in relation with deformation of rubbing surfaces, which can be derived from experimentally evaluated film thickness. Even though the pressure distribution evaluated from measured film thickness is very sensitive to its accuracy, this approach represents a powerful tool for elastohydrodynamic pressure determination thanks to the relative wide availability of film thickness measurement techniques. Chromatic interferograms can be captured within a few microseconds so that this approach seems to be promising in obtaining relevant pressure data even within non-smooth lubricated contacts. This paper presents the results of the effort to extend the applicability of the pressure-film thickness evaluation approach to the non-smooth surfaces. It was found that the main problem is to obtain the film thickness distribution within the whole contact including the inside portion of the deep surface features (e.g. dents). That is why the combination of film thickness data and undeformed dent topography was suggested to overcome these limitations. This approach was validated through the comparison with numerical solution using dented surface and was tested on selected dented contacts operated under thin film and very thin film lubrication conditions.

Keywords

Elastohydrodynamic lubrication; Pressure; Film thickness; Dents

Authors

KŘUPKA, I.; HARTL, M.; VRBKA, M.; VAVERKA, M.; POLIŠČUK, R.

RIV year

2009

Released

1. 4. 2009

Publisher

Professional Engineering Publishing

Location

Londýn

ISBN

1350-6501

Periodical

PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART J-JOURNAL OF ENGINEERING TRIBOLOGY

Year of study

223

Number

State

United Kingdom of Great Britain and Northern Ireland

Pages from

683

Pages to

693

Pages count

BibTex

@article{BUT47937,
  author="Ivan {Křupka} and Martin {Hartl} and Martin {Vrbka} and Michal {Vaverka} and Radek {Poliščuk}",
  title="Effect of surface dents on contact pressure in elastohydrodynamic contacts",
  journal="PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART J-JOURNAL OF ENGINEERING TRIBOLOGY",
  year="2009",
  volume="223",
  number="4",
  pages="683--693",
  issn="1350-6501"
}