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Use of optical techniques in the assment of the displacement field near the crack tip

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dc.contributor.authorRibeiro, J.E.
dc.contributor.authorVaz, M.A.P.
dc.contributor.authorLopes, Hernani
dc.contributor.authorMelo, F.J.M.Q. de
dc.contributor.authorMonteiro, Jaime M.
dc.date.accessioned2010-10-29T15:01:59Z
dc.date.available2010-10-29T15:01:59Z
dc.date.issued2010
dc.description.abstractA crack tip represents a highly singular stress field existing in a structural component. The evaluation of the associate strain gradient is difficult using experimental discrete methods. An efficient alternative relies on optical methods which are non contact and give continuous information about displacements fields and its derivatives for strain evaluation. This paper describes some experimental methods to fully characterize the displacement field near a crack tip existing in flat plates. Three optical field techniques based on image analysis were used in the present work; respectively ESPI (Electronic speckle pattern interferometry), MI (Moiré Interferometry), and DIC (digital image correlation). These methods present different resolutions which can be adjusted according to the expected strain gradient. While the first method depends on the laser wavelength, the second depends on the grid pitch and the last on the surface texture.por
dc.identifier.citationRibeiro, J.E.; Vaz, M.A.P. ; Lopes, H.; Melo, Francisco; Monteiro, Jaime (2010). Use of optical techniques in the assment of the displacement field near the crack tip. In Conferência Ibérica de Fractura e Integridade Estrutura. Porto. p.357-360. ISSN: 0213-3725por
dc.identifier.issn0213-3725
dc.identifier.urihttp://hdl.handle.net/10198/2718
dc.language.isoengpor
dc.publisherSecretaria del Grupo Español de Fracturapor
dc.relation.publisherversionwww.engebook.compor
dc.subjectOptical Methodspor
dc.subjectESPIpor
dc.subjectMoiré interferometrypor
dc.subjectDigital image correlationpor
dc.subjectCrack tippor
dc.titleUse of optical techniques in the assment of the displacement field near the crack tippor
dc.typeconference object
dspace.entity.typePublication
oaire.citation.conferencePlacePortopor
oaire.citation.endPage360por
oaire.citation.startPage357por
oaire.citation.titleConferência Ibérica de Fractura e Integridade Estruturalpor
person.familyNameRibeiro
person.givenNameJ.E.
person.identifierR-000-6Y8
person.identifier.ciencia-id0F15-FB62-29DB
person.identifier.orcid0000-0001-6300-148X
person.identifier.ridG-3839-2018
person.identifier.scopus-author-id25638652400
rcaap.rightsopenAccesspor
rcaap.typeconferenceObjectpor
relation.isAuthorOfPublicationc90169e6-7889-4270-a096-35b98c75f9f9
relation.isAuthorOfPublication.latestForDiscoveryc90169e6-7889-4270-a096-35b98c75f9f9

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