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The effect of two-sided roughness in rolling/sliding EHL line contacts
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Machine Elements.ORCID iD: 0000-0001-9110-2819
2004 (English)In: Transient processes in tribology: proceedings of the 30th Leeds-Lyon Symposium on Tribology / [ed] Gerard Dalmaz, Amstersam: Elsevier, 2004Conference paper, Published paper (Refereed)
Abstract [en]

In most theoretical studies carried out to date on the effect of surface roughness in elastohydrodynamic lubrication (EHL) one surface is considered smooth and one as being rough. In real tribological contacts however, both surfaces normally have similar roughness heights. When modelling a rolling contact it is possible to simply sum the roughness of the two contact surfaces but in a sliding EHL contact, a continuously changing effective surface roughness occurs. The aim of this work was to investigate the influence of elementary surface features such as dents and ridges on the film thickness and pressure. This was done numerically using transient non-Newtonian simulations of an EHL line contact using a coupled smoother combined with a multilevel technique. Four different "overtaking" phenomena were investigated; ridge-ridge, dent-ridge, ridge-dent, and dent-dent. It was shown that the minimum film-thickness produced by a ridge is further reduced in a dent-ridge overtaking event. The squeeze effect seen in the ridge-ridge case resulted in large deformations and film-thickness heights comparable to the corresponding smooth case just before the overtaking event occurred. These local effects arising from simulating two-sided roughness were compared to simulations using a traditional "one-sided rough surface contacting a perfectly smooth surface.".

Place, publisher, year, edition, pages
Amstersam: Elsevier, 2004.
Series
Tribology series ; 43
National Category
Tribology (Interacting Surfaces including Friction, Lubrication and Wear)
Research subject
Machine Elements
Identifiers
URN: urn:nbn:se:ltu:diva-32323Local ID: 6c9bb8c0-baa0-11db-b560-000ea68e967bISBN: 0-444-51706-5 (print)OAI: oai:DiVA.org:ltu-32323DiVA, id: diva2:1005557
Conference
Leeds-Lyon Symposium on Tribology : 02/09/2003 - 05/09/2003
Note
Godkänd; 2004; 20070129 (almqvist)Available from: 2016-09-30 Created: 2016-09-30 Last updated: 2018-01-14Bibliographically approved

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Almqvist, AndreasLarsson, Roland

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CiteExportLink to record
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Citation style
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
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Language
  • de-DE
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  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
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  • Other locale
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Output format
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