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Crack onset in stretched open hole PMMA plates considering linear and non-linear elastic behaviours

2021-08Journal article Restricted access
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dc.contributor.authorLeite, Afonso
dc.contributor.authorMantic, V.
dc.contributor.authorParis, F.
dc.date.accessioned2021-09-22T10:51:34Z
dc.date.available2021-09-22T10:51:34Z
dc.date.issued2021-08
dc.description.abstractCrack onset in PMMA holed plates subjected to tensile stresses is studied experimentally and by the coupled stress and energy criterion of the Finite Fracture Mechanics (CCFFM). The elastic, strength and fracture properties of PMMA are determined by the standard tests, a clearly nonlinear stress-strain relation being identified in the tensile tests. Thus, a novel numerical implementation of the CCFFM considering a non-linear elastic (NLE) material model, using the Ramberg-Osgood approximation, in addition to the usually used linear elastic (LE) model, is developed. Testing of plates with different hole sizes shows a hole size effect in the nominal failure load as expected. For a better fitting of the experimental results, higher strength values obtained by three point bending (TPB) flatwise and edgewise coupons (without any notch), for these material models, are used, apparently for the first time, in the CCFFM predictions. This approach reflects the observation that the strength values associated to smaller but highly stressed volumes, like those located at stress maxima in the holed plates and TPB specimens, are higher. For finite-width holed plates and both material behaviours, suitable FEM models are developed to implement the CCFFM for both LE and NLE models, considering plane stress state. Moreover, an inverse procedure is devised, using the experimental data for holed plates and predictions by CCFFM, to estimate the strength and fracture properties to be used in both material models, providing very good correlations of the CCFFM predictions with the experimental results.pt_PT
dc.description.versioninfo:eu-repo/semantics/publishedVersionpt_PT
dc.identifier.citationLEITE, Afonso; MANTIC, V.; PARIS, F. – Crack onset in stretched open hole PMMA plates considering linear and non-linear elastic behaviours. Theoretical and Applied Fracture Mechanics. ISSN 0167-8442. Vol. 114 (2021), pp. 1-19pt_PT
dc.identifier.doi10.1016/j.tafmec.2021.102931pt_PT
dc.identifier.eissn1872-7638
dc.identifier.issn0167-8442
dc.identifier.urihttp://hdl.handle.net/10400.21/13779
dc.language.isoengpt_PT
dc.peerreviewedyespt_PT
dc.publisherElsevierpt_PT
dc.relationSFRH/BD/ 49279/2008 - FCTpt_PT
dc.relationProject MAT2015-71036-P - Spanish Ministry of Economy and Competitiveness and European Regional Development Fundpt_PT
dc.relationProject P18-FR-1928 - Consejería de Economía y Conocimiento de la Junta de Andalucía and European Regional Development Fundpt_PT
dc.relation.publisherversionhttps://www.sciencedirect.com/science/article/pii/S0167844221000392?via%3Dihubpt_PT
dc.subjectFinite fracture mechanicspt_PT
dc.subjectCoupled criterionpt_PT
dc.subjectCrack onsetpt_PT
dc.subjectPMMApt_PT
dc.subjectPlates with holes in tensionpt_PT
dc.subjectStress concentrationpt_PT
dc.subjectNon-linear elastic materialpt_PT
dc.titleCrack onset in stretched open hole PMMA plates considering linear and non-linear elastic behaviourspt_PT
dc.typejournal article
dspace.entity.typePublication
oaire.citation.endPage19pt_PT
oaire.citation.startPage1pt_PT
oaire.citation.titleTheoretical and Applied Fracture Mechanicspt_PT
oaire.citation.volume114pt_PT
person.identifier.ciencia-id7E13-26AE-A8E2
rcaap.rightsclosedAccesspt_PT
rcaap.typearticlept_PT
relation.isAuthorOfPublication2ba57869-2fc3-4d1d-9b80-c507403e40e1
relation.isAuthorOfPublication.latestForDiscovery2ba57869-2fc3-4d1d-9b80-c507403e40e1

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