Publication detail

Experimental Study of Microtextured Surfaces Operating Under Thin-Film EHD Lubrication Conditions

KŘUPKA, I. HARTL, M.

Original Title

Experimental Study of Microtextured Surfaces Operating Under Thin-Film EHD Lubrication Conditions

Type

journal article - other

Language

English

Original Abstract

The effect of microdents within thin elastohydrodynamics (EHD) contacts has been studied by two measurement techniques. Phase-shifting interferometry was used to obtain topography of microtextured surface and thin-film colorimetric interferometry provided detailed information about film thickness changes within a lubricated contact. The behavior of microdents has been observed for positive slide-to-roll ratios when the disk is moving faster than the microtextured ball. The depth of microdents has been found to play significant role as to the lubrication films efficiency. The presence of deep microdents within lubricated contact results in film thickness reduction downstream that can even cause lubrication film breakdown. As the depth of microdents is reduced, this effect diminishes and beneficial effect of microdents on film thickness formation has been observed. No such an effect of microdent depth on lubricant film shape has been observed in case of negative slide-to-roll conditions when microdents do not cause film thickness reduction regardless of their depths. Obtained results suggest that surface texturing using microdents of an appropriate depth could help to increase lubrication films capabilities.

Keywords

surface texturing; film thickness; colorimetric interferometry

Authors

KŘUPKA, I.; HARTL, M.

RIV year

2007

Released

1. 7. 2007

Publisher

ASME Technical Publications

Location

USA

ISBN

0742-4787

Periodical

ASME Transaction, Journal of Tribology

Year of study

129

Number

3

State

United States of America

Pages from

502

Pages to

508

Pages count

7

BibTex

@article{BUT43856,
  author="Ivan {Křupka} and Martin {Hartl}",
  title="Experimental Study of Microtextured Surfaces Operating Under Thin-Film EHD Lubrication Conditions",
  journal="ASME Transaction, Journal of Tribology",
  year="2007",
  volume="129",
  number="3",
  pages="502--508",
  issn="0742-4787"
}