Elastohydrodynamic lubrication of compliant circular contacts near glass-transition temperature

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dc.contributor.authorKřupka, Jiřícs
dc.contributor.authorDočkal, Kryštofcs
dc.contributor.authorKřupka, Ivancs
dc.contributor.authorHartl, Martincs
dc.coverage.issue7cs
dc.coverage.volume10cs
dc.date.accessioned2022-07-29T10:52:31Z
dc.date.available2022-07-29T10:52:31Z
dc.date.issued2022-07-13cs
dc.description.abstractLubrication of polymer materials nowadays represents a subject of interest in many engineering applications, such as bearings or gears, to utilize them in the areas where conventional metal materials have so far dominated. However, material properties of polymers are strongly dependent on temperature that delimits a lubrication process and leads to manifestations of viscoelastic behavior of polymers. An understanding of mechanisms, which are responsible for formation of film thickness near the glass-transition temperature, is necessary to prevent initialization of failure modes and to increase the durability of polymer engineering components. Optical chromatic interferometry was applied to investigate development of film thickness and changes in contact geometry of compliant circular contacts operated in the elastohydrodynamic lubrication regime (EHL). Film thickness was compared with soft EHL prediction models, differences in contact geometry were assessed and their contribution to film thickness development were evaluated. Qualitatively good agreement of experimental results of central film thickness and soft EHL predictions was observed; however, minimum film thickness shows significant discrepancies. Outcomes and findings confirm the operation of the compliant circular contact in Isoviscous-elastic regime of EHL and the main influence of temperature and load to thermomechanical response of amorphous polymer PMMA.en
dc.formattextcs
dc.format.extent1-18cs
dc.format.mimetypeapplication/pdfcs
dc.identifier.citationLubricants. 2022, vol. 10, issue 7, p. 1-18.en
dc.identifier.doi10.3390/lubricants10070155cs
dc.identifier.issn2075-4442cs
dc.identifier.other178519cs
dc.identifier.urihttp://hdl.handle.net/11012/208204
dc.language.isoencs
dc.publisherMDPIcs
dc.relation.ispartofLubricantscs
dc.relation.urihttps://www.mdpi.com/2075-4442/10/7/155cs
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.subjectelastohydrodynamic lubricationen
dc.subjectIsoviscous-elastic regimeen
dc.subjectcompliant circular contacten
dc.subjectfilm thicknessen
dc.subjectglass-transition temperatureen
dc.subjectamorphous polymeren
dc.subjectoptical chromatic interferometryen
dc.titleElastohydrodynamic lubrication of compliant circular contacts near glass-transition temperatureen
dc.type.driverarticleen
dc.type.statusPeer-revieweden
dc.type.versionpublishedVersionen
sync.item.dbidVAV-178519en
sync.item.dbtypeVAVen
sync.item.insts2023.02.08 20:55:34en
sync.item.modts2023.02.08 20:14:27en
thesis.grantorVysoké učení technické v Brně. Fakulta strojního inženýrství. Ústav konstruovánícs
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