Detail publikace

The effect of surface texturing on thin EHD lubrication films

KŘUPKA, I. HARTL, M.

Originální název

The effect of surface texturing on thin EHD lubrication films

Typ

článek v časopise - ostatní, Jost

Jazyk

angličtina

Originální abstrakt

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.

Klíčová slova

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

Autoři

KŘUPKA, I.; HARTL, M.

Rok RIV

2007

Vydáno

1. 7. 2007

Nakladatel

Elsevier

Místo

Velká Británie

ISSN

0301-679X

Periodikum

Tribology International

Ročník

40

Číslo

7

Stát

Spojené království Velké Británie a Severního Irska

Strany od

1100

Strany do

1110

Strany počet

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"
}