On the Relation between Friction Increase and Grease Thickener Entraining on a Border of Mixed EHL Lubrication

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dc.contributor.authorZapletal, Tomášcs
dc.contributor.authorŠperka, Petrcs
dc.contributor.authorKřupka, Ivancs
dc.contributor.authorHartl, Martincs
dc.coverage.issue2cs
dc.coverage.volume8cs
dc.date.accessioned2021-05-17T10:53:07Z
dc.date.available2021-05-17T10:53:07Z
dc.date.issued2020-01-29cs
dc.description.abstractThis paper deals with an experimental study of film thickness and friction of commercial-grade grease and its base oil in a highly loaded contact. In-situ measurements were conducted for two surface textures on a ball-on-disc optical tribometer at the border of mixed lubrication. At high speeds, the film thickness and the friction of grease correspond with the base oil, while, the thickener enters the contact area and locally affects the film thickness and friction at low speeds. It was found out that the thickener starts to enter the contact area approximately at the same speed when the base oil friction increases on Stribeck curve but without direct solid to solid contact. It indicates that both effects can have the same origin. Change of lubricant flow in contact inlet area was discussed as a possible explanation.en
dc.formattextcs
dc.format.extent1-11cs
dc.format.mimetypeapplication/pdfcs
dc.identifier.citationLubricants. 2020, vol. 8, issue 2, p. 1-11.en
dc.identifier.doi10.3390/lubricants8020012cs
dc.identifier.issn2075-4442cs
dc.identifier.other170224cs
dc.identifier.urihttp://hdl.handle.net/11012/196754
dc.language.isoencs
dc.publisherMDPIcs
dc.relation.ispartofLubricantscs
dc.relation.urihttps://www.mdpi.com/2075-4442/8/2/12/pdfcs
dc.rightsCreative Commons Attribution 4.0 Internationalcs
dc.rights.accessopenAccesscs
dc.rights.sherpahttp://www.sherpa.ac.uk/romeo/issn/2075-4442/cs
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/cs
dc.subjectfilm thicknessen
dc.subjectfrictionen
dc.subjectgreaseen
dc.subjectbase oilen
dc.subjectEHLen
dc.titleOn the Relation between Friction Increase and Grease Thickener Entraining on a Border of Mixed EHL Lubricationen
dc.type.driverarticleen
dc.type.statusPeer-revieweden
dc.type.versionpublishedVersionen
sync.item.dbidVAV-170224en
sync.item.dbtypeVAVen
sync.item.insts2021.05.17 12:53:07en
sync.item.modts2021.05.17 12:14:04en
thesis.grantorVysoké učení technické v Brně. Fakulta strojního inženýrství. Ústav konstruovánícs
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