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dc.contributor.authorHeinze, Søren
dc.contributor.authorEchtermeyer, Andreas
dc.date.accessioned2018-08-10T08:00:26Z
dc.date.available2018-08-10T08:00:26Z
dc.date.created2018-07-18T12:32:18Z
dc.date.issued2018
dc.identifier.citationApplied Sciences. 2018, 8 .nb_NO
dc.identifier.issn2076-3417
dc.identifier.urihttp://hdl.handle.net/11250/2511686
dc.description.abstractSome large engineering structures are made by casting polymers into a mold. The structures can have complicated geometries and may be filled with other components, such as electrical transformers. This study investigated casting of large components made of epoxy. Epoxy is easy to pour, bonds well and has relatively low cure shrinkage. However, the cure shrinkage can lead to significant stresses or strains, causing large deformations that can lead to cracks.Understanding the curing process and related shrinkage is important for designing molds and controlling the production process. This study applied a new experimental method to measure strains due to cure shrinkage allowing many accurate local measurements along the length of an optical measurement fiber. The method is based on Optical Backscatter Reflectometry. Six distinct stages of the curing process can be identified. Previous measurements were limited to a few point measurements in small samples. This paper shows cure shrinkage in large samples and identifies some unexpected changes in behavior when going from small to large specimens. The behavior is explained qualitatively.nb_NO
dc.language.isoengnb_NO
dc.publisherMDPInb_NO
dc.rightsNavngivelse 4.0 Internasjonal*
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/deed.no*
dc.titleIn-Situ Strain Measurements in Large Volumes of Hardening Epoxy Using Optical Backscatter Reflectometrynb_NO
dc.typeJournal articlenb_NO
dc.typePeer reviewednb_NO
dc.description.versionpublishedVersionnb_NO
dc.source.pagenumber21nb_NO
dc.source.volume8nb_NO
dc.source.journalApplied Sciencesnb_NO
dc.identifier.doi10.3390/app8071141
dc.identifier.cristin1597779
dc.description.localcode(C) 2018 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).nb_NO
cristin.unitcode194,64,92,0
cristin.unitnameInstitutt for maskinteknikk og produksjon
cristin.ispublishedtrue
cristin.fulltextpostprint
cristin.qualitycode1


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