Optimization of embedded optical sensor location in composite repairs

Tsamasphyros, G; Furnarakis, N; Kanderakis, G; Marioli-Riga, Z

dc.contributor.author	Tsamasphyros, G	en
dc.contributor.author	Furnarakis, N	en
dc.contributor.author	Kanderakis, G	en
dc.contributor.author	Marioli-Riga, Z	en
dc.date.accessioned	2014-03-01T01:19:24Z
dc.date.available	2014-03-01T01:19:24Z
dc.date.issued	2003	en
dc.identifier.issn	0929189X	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/15466
dc.subject	Embedded brag grating sensing	en
dc.subject	Smart composite patching	en
dc.subject.other	Cracks	en
dc.subject.other	Finite element method	en
dc.subject.other	Laminates	en
dc.subject.other	Mathematical models	en
dc.subject.other	Mechanical properties	en
dc.subject.other	Optical fibers	en
dc.subject.other	Optical sensors	en
dc.subject.other	Optimization	en
dc.subject.other	Repair	en
dc.subject.other	Resins	en
dc.subject.other	Strain	en
dc.subject.other	Structural loads	en
dc.subject.other	Embedded brag grating sensing	en
dc.subject.other	Smart composite patching	en
dc.subject.other	Stacking sequence	en
dc.subject.other	Metallic matrix composites	en
dc.title	Optimization of embedded optical sensor location in composite repairs	en
heal.type	journalArticle	en
heal.identifier.primary	10.1023/A:1023916407469	en
heal.identifier.secondary	http://dx.doi.org/10.1023/A:1023916407469	en
heal.publicationDate	2003	en
heal.abstract	Optical fibers were embedded in a bonded composite patch in order to detect the strain field variations of a load bearing structure. The study concentrated on a classical cracked metallic structure repaired with this 'smart' patch and using finite element analysis. Six different laminates constituted the model of the composite patch, a layered structure with three-dimensional elements. Each laminate is assumed to have different mechanical properties, according to the case under any specific study, in order to simulate different stacking sequence or material used. A resin rich 'eye' pocket has also been modeled in order to simulate the exact form of the resin area produced during the manufacturing process. The patch is bonded over a cracked aluminum sheet through a small adhesive layer placed in between. External loads were applied only on the metal structure, as in a real repair case. The primary loading axis of the metal was assumed to be parallel to the direction of the optical fibers. The different nature of the materials that form the composite patch generated complex mechanical interactions between the fibers and the surrounding material, resulting in a complicated stress field along the optical fiber sensor, which affects the structural integrity of both the patch and the repair. Different optical fiber positions were considered, moving towards the horizontal and vertical dimensions of the patch, as well as different patch architectures (single and double patch configurations), with the hope of studying their effect on the structural integrity of the patch.	en
heal.journalName	Applied Composite Materials	en
dc.identifier.doi	10.1023/A:1023916407469	en
dc.identifier.volume	10	en
dc.identifier.issue	3	en
dc.identifier.spage	129	en
dc.identifier.epage	140	en