Response of fiber Bragg gratings bonded on a glass/epoxy laminate subjected to static loadings

Handle URI:
http://hdl.handle.net/10754/550711
Title:
Response of fiber Bragg gratings bonded on a glass/epoxy laminate subjected to static loadings
Authors:
Mulle, Matthieu; Moussawi, Ali ( 0000-0002-5978-7990 ) ; Lubineau, Gilles ( 0000-0002-7370-6093 ) ; Durand, Samuel; Falandry, Didier; Olivier, Philippe
Abstract:
Fiber Bragg gratings (FBG) may be used to monitor strain over the surface of a structure as an alternative technology to conventional strain gauges. However, FBG bonding techniques have still not been established to yield satisfactory surface measurements. Here, two adhesives were investigated, one with low viscosity and the other with high viscosity for bonding FBGs on glass/epoxy sandwich skins. First, instrumented elementary specimens were tested under tension. FBG strain results were analyzed together with digital image correlation (DIC) measurements. The influence of the bonding layer on the measured strain and on the integrity of the sensor was investigated by considering different regions of interest. Next, an instrumented structural sandwich beam was tested under four-point bending. FBG rosettes were compared to conventional strain gauge rosettes. The high viscosity adhesive demonstrated behaviors that affected FBG accuracy. Brittleness of the bonding layer and poor interface adhesion were observed using DIC and X-ray tomography. By contrast, the low viscosity adhesive demonstrated satisfactory results. The FBG strain measurements appeared to be consistent with those of DIC. The accuracy is also adequate as the FBGs and the conventional strain gauges had similar results in three directions, under tension and under compression.
KAUST Department:
Physical Sciences and Engineering (PSE) Division; COHMAS Laboratory
Citation:
Response of fiber Bragg gratings bonded on a glass/epoxy laminate subjected to static loadings 2015 Composite Structures
Publisher:
Elsevier BV
Journal:
Composite Structures
Issue Date:
22-Apr-2015
DOI:
10.1016/j.compstruct.2015.04.015
Type:
Article
ISSN:
02638223
Additional Links:
http://linkinghub.elsevier.com/retrieve/pii/S0263822315003062
Appears in Collections:
Articles; Physical Sciences and Engineering (PSE) Division

Full metadata record

DC FieldValue Language
dc.contributor.authorMulle, Matthieuen
dc.contributor.authorMoussawi, Alien
dc.contributor.authorLubineau, Gillesen
dc.contributor.authorDurand, Samuelen
dc.contributor.authorFalandry, Didieren
dc.contributor.authorOlivier, Philippeen
dc.date.accessioned2015-04-27T16:21:21Zen
dc.date.available2015-04-27T16:21:21Zen
dc.date.issued2015-04-22en
dc.identifier.citationResponse of fiber Bragg gratings bonded on a glass/epoxy laminate subjected to static loadings 2015 Composite Structuresen
dc.identifier.issn02638223en
dc.identifier.doi10.1016/j.compstruct.2015.04.015en
dc.identifier.urihttp://hdl.handle.net/10754/550711en
dc.description.abstractFiber Bragg gratings (FBG) may be used to monitor strain over the surface of a structure as an alternative technology to conventional strain gauges. However, FBG bonding techniques have still not been established to yield satisfactory surface measurements. Here, two adhesives were investigated, one with low viscosity and the other with high viscosity for bonding FBGs on glass/epoxy sandwich skins. First, instrumented elementary specimens were tested under tension. FBG strain results were analyzed together with digital image correlation (DIC) measurements. The influence of the bonding layer on the measured strain and on the integrity of the sensor was investigated by considering different regions of interest. Next, an instrumented structural sandwich beam was tested under four-point bending. FBG rosettes were compared to conventional strain gauge rosettes. The high viscosity adhesive demonstrated behaviors that affected FBG accuracy. Brittleness of the bonding layer and poor interface adhesion were observed using DIC and X-ray tomography. By contrast, the low viscosity adhesive demonstrated satisfactory results. The FBG strain measurements appeared to be consistent with those of DIC. The accuracy is also adequate as the FBGs and the conventional strain gauges had similar results in three directions, under tension and under compression.en
dc.publisherElsevier BVen
dc.relation.urlhttp://linkinghub.elsevier.com/retrieve/pii/S0263822315003062en
dc.rightsNOTICE: this is the author’s version of a work that was accepted for publication in Composite Structures. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Composite Structures, 22 April 2015. DOI: 10.1016/j.compstruct.2015.04.015en
dc.subjectStructural health monitoring (SHM)en
dc.subjectCompositeen
dc.subjectLaminateen
dc.subjectSandwichen
dc.subjectFiber Bragg grating (FBG)en
dc.subjectDigital image correlation (DIC)en
dc.titleResponse of fiber Bragg gratings bonded on a glass/epoxy laminate subjected to static loadingsen
dc.typeArticleen
dc.contributor.departmentPhysical Sciences and Engineering (PSE) Divisionen
dc.contributor.departmentCOHMAS Laboratoryen
dc.identifier.journalComposite Structuresen
dc.eprint.versionPost-printen
dc.contributor.institutionMECA design office, Nantes, Franceen
dc.contributor.institutionCRITT Mechanical Engineering and Composites, Toulouse, Franceen
dc.contributor.institutionClement Ader Institut (ICA), Paul Sabatier University, Toulouse, Franceen
kaust.authorMulle, Matthieuen
kaust.authorMoussawi, Alien
kaust.authorLubineau, Gillesen
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