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Tensile properties of cork in axial stress and influence of porosity, density, quality and radial position in the plank

2010Journal article Open access
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dc.contributor.authorAnjos, O.
dc.contributor.authorPereira, Helena
dc.contributor.authorRosa, Maria Emília
dc.date.accessioned2019-04-12T23:39:21Z
dc.date.available2019-04-12T23:39:21Z
dc.date.issued2010
dc.description.abstractThe behaviour of cork under tensile stress in the axial direction was studied for samples taken from cork planks of good (class 1) and poor (class 4) quality grades and at three radial positions within the plank (inner, mid and outer positions). The effect of cork density (ranging from 0.123 to 0.203 g cm−3) and porosity (ranging from 2.8 to 9.6% in the tangential surface) on Young’s modulus and fracture stress and strain was studied. The tensile stress-strain curves of cork showed an elastic deformation up to 2% strain with a Young’s modulus of 30.8 MPa, and a fracture stress of 1.05 MPa at a strain of 7.1% for class 1, and Young’s modulus of 26.1 MPa, and a fracture stress of 0.77 MPa at a strain of 5.5% for class 4. Fracture always started at a pore. The quality class and the radial position in the plank were highly significant factors of the tensile properties variation with good quality cork in the inner part of the plank showing the highest strength. Density influenced the elastic behaviour of cork with a highly significant correlation of increasing E with density, but not so clearly the fracture stress and strain. The variability of tensile properties with porosity was large and although significant, the correlations were lower in spite of a decreasing trend of E with porosity. Fracture depended on the type of defects in corkpt_PT
dc.description.versioninfo:eu-repo/semantics/publishedVersionpt_PT
dc.identifier.doi10.1007/s00107-009-0407-0pt_PT
dc.identifier.urihttp://hdl.handle.net/10400.11/6463
dc.language.isoengpt_PT
dc.peerreviewedyespt_PT
dc.subjectFracture Stress; Radial Position; Tensile Behaviour; Quality Class; Outer Positionpt_PT
dc.titleTensile properties of cork in axial stress and influence of porosity, density, quality and radial position in the plankpt_PT
dc.typejournal article
dspace.entity.typePublication
oaire.citation.endPage91pt_PT
oaire.citation.issue1pt_PT
oaire.citation.startPage85pt_PT
oaire.citation.volume69pt_PT
person.familyNameAnjos
person.givenNameOfélia
person.identifier.ciencia-idC21D-D8C7-3037
person.identifier.orcid0000-0003-0267-3252
person.identifier.ridG-2808-2012
person.identifier.scopus-author-id23395659700
rcaap.rightsopenAccesspt_PT
rcaap.typearticlept_PT
relation.isAuthorOfPublicationdf9191ae-0bbb-4bb8-bbdc-0f79c7365876
relation.isAuthorOfPublication.latestForDiscoverydf9191ae-0bbb-4bb8-bbdc-0f79c7365876

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