Publication detail

The effect of surface texturing on thin EHD lubrication films

KŘUPKA, I. HARTL, M.

Original Title

The effect of surface texturing on thin EHD lubrication films

Type

journal article - other

Language

English

Original Abstract

Surface texturing has been successfully used for conformal contacts in many tribological applications in an effort to diminish friction and wear. However, the use of such a surface modifications are still in nascent as far as highly loaded contacts between non-conformal surfaces are concerned. It is mainly caused by the fact that the presence of such micro-features within these contacts can significantly influence the pressure distribution within the contact. Nevertheless, it has been shown in recent studies that the surface texturing can also have beneficial tribological effects if the depth of micro-features is properly designed. This paper is devoted to the experimental study of the effect of the micro-dents of various depths on thin lubrication films to find an experimental evidence of the micro-feature depth threshold for surface texturing applications in highly loaded non-conformal surfaces. The behaviour of an array of micro-dents within thin EHD contacts has been studied by thin film colorimetric interferometry. The influence of surface texturing on lubricant film formation has been observed under sliding/rolling conditions. The significant effect of micro-dents depth on lubricant film thickness is observed for positive slide-to-roll ratio when the disc is moving faster than the micro-textured ball. The presence of deep micro-dents within lubricated contact results in film thickness reduction downstream. As the depth of micro-dents is reduced, this effect diminishes and beneficial effect of micro-dents on film thickness formation has been observed. No significant influence of micro-dents depth on lubricant film shape has been observed in case of negative slide-to-roll conditions when micro-dents do not cause film thickness reduction regardless of their depths.

Keywords

Elastohydrodynamic lubrication; Film thickness; Micro-dents; Thin film colorimetric interferometry; Surface texturing

Authors

KŘUPKA, I.; HARTL, M.

RIV year

2007

Released

1. 7. 2007

Publisher

Elsevier

Location

Velká Británie

ISBN

0301-679X

Periodical

Tribology International

Year of study

40

Number

7

State

United Kingdom of Great Britain and Northern Ireland

Pages from

1100

Pages to

1110

Pages count

11

BibTex

@article{BUT43776,
  author="Ivan {Křupka} and Martin {Hartl}",
  title="The effect of surface texturing on thin EHD lubrication films",
  journal="Tribology International",
  year="2007",
  volume="40",
  number="7",
  pages="1100--1110",
  issn="0301-679X"
}