Viscoelastic Response of Elastohydrodynamically Lubricated Compliant Contacts below Glass-Transition Temperature

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dc.contributor.authorKřupka, Jiřícs
dc.contributor.authorDočkal, Kryštofcs
dc.contributor.authorSedláček, Tomášcs
dc.contributor.authorRebenda, Davidcs
dc.contributor.authorKřupka, Ivancs
dc.contributor.authorHartl, Martincs
dc.coverage.issue11cs
dc.coverage.volume15cs
dc.date.issued2023-05-30cs
dc.description.abstractThe widespread use of polymers in the high-performance engineering applications brings challenges in the field of liquid lubrication in order to separate the rubbing surfaces by the coherent fluid-film thickness relative to not only the inelastic material response of the polymers. The determination of the mechanical properties by the nanoindentation and the dynamic mechanical analysis represents the key methodology to identify the viscoelastic behavior with respect to the intense frequency and temperature dependance exhibited by polymers. The fluid-film thickness was examined by the optical chromatic interferometry on the rotational tribometer in the ball-on-disc configuration. Based on the experiments performed, first, the complex modulus and the damping factor for the PMMA polymer describing the frequency and temperature dependence were obtained. Afterwards, the central as well as minimum fluid-film thickness were investigated. The results revealed the operation of the compliant circular contact in the transition region very close to the boundary between the Piezoviscous-elastic and Isoviscous-elastic modes of the elastohydrodynamic lubrication regime, and a significant deviation of the fluid-film thickness from the prediction models for both modes in dependence on the inlet temperature.en
dc.formattextcs
dc.format.extent1-20cs
dc.format.mimetypeapplication/pdfcs
dc.identifier.citationPolymers. 2023, vol. 15, issue 11, p. 1-20.en
dc.identifier.doi10.3390/polym15112528cs
dc.identifier.issn2073-4360cs
dc.identifier.orcid0000-0003-4238-2599cs
dc.identifier.orcid0000-0001-8070-6334cs
dc.identifier.orcid0000-0002-5407-1336cs
dc.identifier.orcid0000-0002-9936-7480cs
dc.identifier.orcid0000-0001-5432-6645cs
dc.identifier.other183968cs
dc.identifier.researcheridU-1569-2017cs
dc.identifier.researcheridH-5748-2016cs
dc.identifier.researcheridB-1770-2017cs
dc.identifier.researcheridD-8147-2012cs
dc.identifier.researcheridD-8261-2012cs
dc.identifier.scopus7005196946cs
dc.identifier.urihttp://hdl.handle.net/11012/213613
dc.language.isoencs
dc.publisherMDPIcs
dc.relation.ispartofPolymerscs
dc.relation.urihttps://www.mdpi.com/2073-4360/15/11/2528cs
dc.rightsCreative Commons Attribution 4.0 Internationalcs
dc.rights.accessopenAccesscs
dc.rights.sherpahttp://www.sherpa.ac.uk/romeo/issn/2073-4360/cs
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/cs
dc.subjectcompliant contacten
dc.subjectelastohydrodynamic lubricationen
dc.subjecttransition regionen
dc.subjectfluid-film thicknessen
dc.subjectoptical chromatic interferometryen
dc.subjectviscoelastic behavioren
dc.titleViscoelastic Response of Elastohydrodynamically Lubricated Compliant Contacts below Glass-Transition Temperatureen
dc.type.driverarticleen
dc.type.statusPeer-revieweden
dc.type.versionpublishedVersionen
sync.item.dbidVAV-183968en
sync.item.dbtypeVAVen
sync.item.insts2025.02.03 15:48:44en
sync.item.modts2025.01.17 18:46:41en
thesis.grantorVysoké učení technické v Brně. Fakulta strojního inženýrství. Ústav konstruovánícs
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