Publication detail
Effect of Surface Texturing on Very Thin Film EHD Lubricated Contacts
KŘUPKA, I. HARTL, M.
Czech title
Vliv modifikace topografie na velmi tenký mazací film
English title
Effect of Surface Texturing on Very Thin Film EHD Lubricated Contacts
Type
journal article - other
Language
en
Original abstract
Micro-dents of various depths and shapes have been produced on rubbing surfaces to find out whether there could be some operational conditions suitable for surface texturing applications in highly loaded non-conformal contacts. The significant effect of the size and shape of the micro-dents has been observed as a function of the slide-to-roll ratio. Shallow micro-features within concentrated contact were found to increase the film thickness by supplying more lubricant to the contact under rolling/sliding conditions. However, in many cases this effect was accompanied with local film thickness reduction that even caused lubrication film breakdown under thin film lubrication conditions. Longitudinally and transversely oriented short grooves were found not to be completely suitable for the surface texturing applications from this point of view. Conversely, small circular micro-dents seem to be more promising as to their use to help to separate rubbing surfaces when a micro-textured surface is moving faster than a non-textured one and the lubrication films become very thin. Nevertheless, it would require a well-balanced design, taking into account many factors as the lubrication regime, the slide-to-roll ratio conditions, the rolling contact fatigue, the technology of surface texturing patterns creation, etc.
Czech abstract
Článek je věnován vlivu modifikace topografie na velmi tenký mazací film.
English abstract
Micro-dents of various depths and shapes have been produced on rubbing surfaces to find out whether there could be some operational conditions suitable for surface texturing applications in highly loaded non-conformal contacts. The significant effect of the size and shape of the micro-dents has been observed as a function of the slide-to-roll ratio. Shallow micro-features within concentrated contact were found to increase the film thickness by supplying more lubricant to the contact under rolling/sliding conditions. However, in many cases this effect was accompanied with local film thickness reduction that even caused lubrication film breakdown under thin film lubrication conditions. Longitudinally and transversely oriented short grooves were found not to be completely suitable for the surface texturing applications from this point of view. Conversely, small circular micro-dents seem to be more promising as to their use to help to separate rubbing surfaces when a micro-textured surface is moving faster than a non-textured one and the lubrication films become very thin. Nevertheless, it would require a well-balanced design, taking into account many factors as the lubrication regime, the slide-to-roll ratio conditions, the rolling contact fatigue, the technology of surface texturing patterns creation, etc.
Keywords in Czech
Modifikace topografie; Elastohydrodynamické mazání; Tloušťka
Keywords in English
Elastohydrodynamic Lubrication; Film Thickness; Surface Texturing
RIV year
2009
Released
21.01.2009
Publisher
Taylor Francis
Location
Londýn
ISSN
1040-2004
Journal
TRIBOLOGY TRANSACTIONS
Volume
52
Number
1
Pages from–to
21–28
Pages count
8
BIBTEX
@article{BUT47938,
author="Ivan {Křupka} and Martin {Hartl},
title="Effect of Surface Texturing on Very Thin Film EHD Lubricated Contacts",
journal="TRIBOLOGY TRANSACTIONS",
year="2009",
volume="52",
number="1",
month="January",
pages="21--28",
publisher="Taylor Francis",
address="Londýn",
issn="1040-2004"
}