Detection of patch debonding in composite repaired cracked metallic specimens, using optical fibers and sensors

Tsamasphyros, GJ; Kanderakis, GN; Furnarakis, NK; Marioli-Riga, ZP

dc.contributor.author	Tsamasphyros, GJ	en
dc.contributor.author	Kanderakis, GN	en
dc.contributor.author	Furnarakis, NK	en
dc.contributor.author	Marioli-Riga, ZP	en
dc.date.accessioned	2014-03-01T02:49:23Z
dc.date.available	2014-03-01T02:49:23Z
dc.date.issued	2003	en
dc.identifier.issn	0277786X	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/34570
dc.relation.uri	http://www.scopus.com/inward/record.url?eid=2-s2.0-1342309684&partnerID=40&md5=4b5b271b123cdc002896b865aeb9c611	en
dc.subject	Composite materials	en
dc.subject	Composite patch repair	en
dc.subject	Optical fibers	en
dc.subject	Smart composite patches	en
dc.subject.other	Adhesives	en
dc.subject.other	Aluminum	en
dc.subject.other	Composite materials	en
dc.subject.other	Crack propagation	en
dc.subject.other	Debonding	en
dc.subject.other	Fiber Bragg gratings	en
dc.subject.other	Fiber optic sensors	en
dc.subject.other	Finite element method	en
dc.subject.other	Optical fibers	en
dc.subject.other	Plate metal	en
dc.subject.other	Repair	en
dc.subject.other	Strain	en
dc.subject.other	Aluminum plate	en
dc.subject.other	Bragg grating sensors	en
dc.subject.other	Composite patch repair	en
dc.subject.other	Patch debonding	en
dc.subject.other	Smart composite patches	en
dc.subject.other	Fiber optic networks	en
dc.title	Detection of patch debonding in composite repaired cracked metallic specimens, using optical fibers and sensors	en
heal.type	conferenceItem	en
heal.publicationDate	2003	en
heal.abstract	A classical cracked metallic structure repaired with a ""smart"" bonded composite patch has been studied, using finite element analysis, in order to determine the debonding detection capabilities of the optical network and to select the appropriate optical fibers paths and Bragg Grating sensors locations. The patch is bonded over a cracked aluminum plate, by means of a thin adhesive layer, while the primary loading axis of the metal is assumed to be parallel to the direction of the optical fibers. Different optical fiber paths and sensor positions were considered and their ability to measure the variation of the developed strain field due to the patch debonding propagation around the crack tip was studied. It was concluded that a fiber optics network is capable of evaluating the increasing debonding area around the crack tip and can provide adequate information concerning the critical parameters required for the monitoring of the structural integrity of composite patch reinforced structures (i.e. strains developed at the patch debonding boundary and position of the crack tip). At least two Bragg Grating sensors should be used at each side of the crack per optical fiber, to enable adequate monitoring of the adhesive debonding and crack propagation.	en
heal.journalName	Proceedings of SPIE - The International Society for Optical Engineering	en
dc.identifier.volume	5145	en
dc.identifier.spage	128	en
dc.identifier.epage	136	en