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, Mikkoen_US
dc.contributor.authorJokinen, Jarnoen_US
dc.contributor.authorSarlin, E.en_US
dc.contributor.authorPärnänen, T.en_US
dc.contributor.authorLindgren, Marien_US
dc.contributor.authorJärventausta, M.en_US
dc.contributor.authorVuorinen, Jyrkien_US
dc.contributor.departmentDepartment of Energy and Mechanical Engineeringen
dc.contributor.groupauthorSolid Mechanicsen
dc.contributor.organizationTampere Universityen_US
dc.contributor.organizationOutotec Research Centeren_US
dc.date.accessioned2019-02-25T08:51:23Z
dc.date.available2019-02-25T08:51:23Z
dc.date.issued2019-03-15en_US
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/pdfen_US
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.2019.01.006en_US
dc.identifier.issn0263-8223
dc.identifier.otherPURE UUID: a89fc0fc-9324-433d-b457-2e22c4b35c21en_US
dc.identifier.otherPURE ITEMURL: https://research.aalto.fi/en/publications/a89fc0fc-9324-433d-b457-2e22c4b35c21en_US
dc.identifier.otherPURE LINK: http://www.scopus.com/inward/record.url?scp=85060108666&partnerID=8YFLogxKen_US
dc.identifier.otherPURE FILEURL: https://research.aalto.fi/files/31510634/ENG_Kanerva_et_al_Lower_stiffness_of_GFRP_Composite_Structures.pdfen_US
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.keywordAgingen_US
dc.subject.keywordElasticityen_US
dc.subject.keywordFinite element modellingen_US
dc.subject.keywordGFRPen_US
dc.subject.keywordSulfuric aciden_US
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

Files