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Measurement of residual stresses with optical techniques

2009Journal article Open access
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dc.contributor.authorRibeiro, J.E.
dc.contributor.authorMonteiro, Jaime M.
dc.contributor.authorVaz, M.A.P.
dc.contributor.authorLopes, Hernani
dc.contributor.authorPiloto, P.A.G.
dc.date.accessioned2010-02-11T16:17:23Z
dc.date.available2010-02-11T16:17:23Z
dc.date.issued2009
dc.description.abstractThe goal of this work was the development of other experimental techniques to measure residual stresses, as an alternative to the hole-drilling method with strain gauges. The proposed experimental techniques are based on the use of Moiré interferometry and in-plane electronic speckle pattern interferometry (ESPI). Both are field techniques allowing the assessment of in-plane displacements without contact and high resolution. Grating replication techniques were developed to record high-quality diffraction gratings onto the specimen's surfaces. An optical set-up of laser interferometry was developed to generate the master grating (virtual). An in-plane ESPI set-up was also designed and implemented to measure displacements in one direction. The stress relaxation was promoted by the blind hole-drilling and the obtained fringe patterns (Moiré and speckle) were video-recorded. Image processing techniques were applied to assess the in-plane strain field. A finite-element code (ansys®) was used to simulate the stress relaxation process, whose values were compared with the experimental data, and to calculate the hole-drilling calibration constants.pt
dc.identifier.citationRibeiro, J.E.; Strain: Monteiro, Jaime; Vaz, M.A.P.; Lopes, H.; Piloto, P.A.G. (2009). Measurement of residual stresses with optical techniques. Strain: An International Journal for Experimental Mechanics. ISSN 1475-1305. 45:2 p. 123-130pt
dc.identifier.issn0039-2103
dc.identifier.urihttp://hdl.handle.net/10198/1852
dc.language.isoengpt
dc.publisherWiley Blackwellpt
dc.relation.publisherversionhttp://www3.interscience.wiley.com/journal/117985070/homept
dc.subjectEelectronic speckle pattern interferometrypt
dc.subjectFinite-element methodpt
dc.subjectHole drillingpt
dc.subjectResidual stressespt
dc.subjectMoiré interferometrypt
dc.titleMeasurement of residual stresses with optical techniquespt
dc.typejournal article
dspace.entity.typePublication
oaire.citation.endPage130pt
oaire.citation.issue45(2)pt
oaire.citation.startPage123pt
oaire.citation.titleStrain: An International Journal for Experimental Mechanicspt
person.familyNameRibeiro
person.familyNamePiloto
person.givenNameJ.E.
person.givenNamePaulo A.G.
person.identifierR-000-6Y8
person.identifier.ciencia-id0F15-FB62-29DB
person.identifier.ciencia-id0519-449D-6F13
person.identifier.orcid0000-0001-6300-148X
person.identifier.orcid0000-0003-2834-0501
person.identifier.ridG-3839-2018
person.identifier.ridB-4866-2008
person.identifier.scopus-author-id25638652400
person.identifier.scopus-author-id6506406159
rcaap.rightsopenAccesspt
rcaap.typearticlept
relation.isAuthorOfPublicationc90169e6-7889-4270-a096-35b98c75f9f9
relation.isAuthorOfPublicationbaaee084-ab97-4c95-b636-24ab6bab0e3e
relation.isAuthorOfPublication.latestForDiscoverybaaee084-ab97-4c95-b636-24ab6bab0e3e

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