Lower stiffness of GFRP after sulfuric acid-solution aging is due to degradation of fibre-matrix interfaces?

dc.contributorAalto-yliopistofi
dc.contributorAalto Universityen
dc.contributor.authorKanerva, Mikko
dc.contributor.authorJokinen, Jarno
dc.contributor.authorSarlin, E.
dc.contributor.authorPärnänen, T.
dc.contributor.authorLindgren, Mari
dc.contributor.authorJärventausta, M.
dc.contributor.authorVuorinen, Jyrki
dc.contributor.departmentTampere University
dc.contributor.departmentSolid Mechanics
dc.contributor.departmentOutotec Research Center
dc.contributor.departmentDepartment of Mechanical Engineeringen
dc.date.accessioned2019-02-25T08:51:23Z
dc.date.available2019-02-25T08:51:23Z
dc.date.issued2019-03-15
dc.description.abstractThe aging effects on composite stiffness are important when structures are monitored under long-term mechanical loads and harsh chemical environment. This work aims to reveal the role of fibre-to-matrix interfacial aging on elastic constants due to a long-term sulfuric acid immersion at a high temperature and pressure. The aging effects of glass fibre matrix interfaces are rather impossible to measure directly and they cannot be easily subtracted from macro scale test results. Here, extensive numerical simulations are automatically run to show the sensitivity of all the essential elastic constants on the experimentally observed output of mechanical tests in reality. Material models are formulated for two different length-scales to understand (1) the sensitivity of the layer's length scale related elastic constants and (2) micro scale material properties. The well-established Halpin-Tsai parameters are used to include interfacial effects. The experimental results show that the aging significantly affects tensile and flexural behavior of glass fibre vinylester epoxy composites: tensile and flexural stiffness decreased 6–49% and ultimate strength values 13–34%. The simulations presented that the degradation of fibre matrix interfaces cannot be excluded and they verified the degradation of glass-fibres’ modulus due the conditioning.en
dc.description.versionPeer revieweden
dc.format.extent11
dc.format.extent524-534
dc.format.mimetypeapplication/pdf
dc.identifier.citationKanerva , M , Jokinen , J , Sarlin , E , Pärnänen , T , Lindgren , M , Järventausta , M & Vuorinen , J 2019 , ' Lower stiffness of GFRP after sulfuric acid-solution aging is due to degradation of fibre-matrix interfaces? ' , Composite Structures , vol. 212 , pp. 524-534 . https://doi.org/10.1016/j.compstruct.2019.01.006en
dc.identifier.doi10.1016/j.compstruct.2019.01.006
dc.identifier.issn0263-8223
dc.identifier.otherPURE UUID: a89fc0fc-9324-433d-b457-2e22c4b35c21
dc.identifier.otherPURE ITEMURL: https://research.aalto.fi/en/publications/a89fc0fc-9324-433d-b457-2e22c4b35c21
dc.identifier.otherPURE LINK: http://www.scopus.com/inward/record.url?scp=85060108666&partnerID=8YFLogxK
dc.identifier.otherPURE FILEURL: https://research.aalto.fi/files/31510634/ENG_Kanerva_et_al_Lower_stiffness_of_GFRP_Composite_Structures.pdf
dc.identifier.urihttps://aaltodoc.aalto.fi/handle/123456789/36853
dc.identifier.urnURN:NBN:fi:aalto-201902252010
dc.language.isoenen
dc.publisherELSEVIER SCI LTD
dc.relation.ispartofseriesComposite Structuresen
dc.relation.ispartofseriesVolume 212en
dc.rightsopenAccessen
dc.subject.keywordAging
dc.subject.keywordElasticity
dc.subject.keywordFinite element modelling
dc.subject.keywordGFRP
dc.subject.keywordSulfuric acid
dc.titleLower stiffness of GFRP after sulfuric acid-solution aging is due to degradation of fibre-matrix interfaces?en
dc.typeA1 Alkuperäisartikkeli tieteellisessä aikakauslehdessäfi
dc.type.versionpublishedVersion
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