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dc.contributor.authorJohnsen, Joakim
dc.contributor.authorGrytten, Frode
dc.contributor.authorHopperstad, Odd Sture
dc.contributor.authorClausen, Arild Holm
dc.date.accessioned2017-03-20T08:12:06Z
dc.date.available2017-03-20T08:12:06Z
dc.date.created2016-07-11T13:29:44Z
dc.date.issued2016
dc.identifier.citationPolymer testing. 2016, 53 305-313.nb_NO
dc.identifier.issn0142-9418
dc.identifier.urihttp://hdl.handle.net/11250/2434622
dc.description.abstractIn this study, we present a method to determine the large-strain tensile behaviour of polymers at low temperatures using a purpose-built temperature chamber made of polycarbonate (PC). This chamber allows for several cameras during testing. In our case, two digital cameras were utilized to monitor the two perpendicular surfaces of the test sample. Subsequently, the pictures were analysed with digital image correlation (DIC) software to determine the strain field on the surface of the specimen. In addition, a thermal camera was used to monitor self-heating during loading. It is demonstrated that the PC chamber does not influence the stress-strain curve as determined by DIC. Applying this set-up, a semi-crystalline cross-linked low-density polyethylene (XLPE) under quasi-static tensile loading has been successfully analysed using DIC at four different temperatures (25 °C, 0 °C, −15 °C, −30 °C). At the lower temperatures, the conventional method of applying a spray-paint speckle failed due to embrittlement and cracking of the spray-paint speckle when the tensile specimen deformed. An alternative method was developed utilising white grease with a black powder added as contrast. The results show a strong increase in both the Young’s modulus and the flow stress for decreasing temperatures within the experimental range. We also observe that although the XLPE material is practically incompressible at room temperature, the volumetric strains reach a value of about 0.1 at the lower temperatures.nb_NO
dc.language.isoengnb_NO
dc.publisherElseviernb_NO
dc.titleExperimental set-up for determination of the large-strain tensile behaviour of polymers at low temperaturesnb_NO
dc.typeJournal articlenb_NO
dc.typePeer reviewednb_NO
dc.source.pagenumber305-313nb_NO
dc.source.volume53nb_NO
dc.source.journalPolymer testingnb_NO
dc.identifier.doi10.1016/j.polymertesting.2016.06.011
dc.identifier.cristin1367451
dc.relation.projectNorges forskningsråd: 228513nb_NO
dc.description.localcode© 2016 Elsevier Ltd. All rights reserved. This is the authors' accepted and refereed manuscript to the article. Locked until 16th of june 2018 due to copyright restrictionsnb_NO
cristin.unitcode194,64,45,0
cristin.unitnameInstitutt for konstruksjonsteknikk
cristin.ispublishedtrue
cristin.fulltextpostprint
cristin.qualitycode1


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