Numerical and experimental investigation for optimum placement of dielectric sensors to/into a damaged structure

Kalkanis, K; Tsamasphyros, GJ; Papathanasiou, ThK; Kanderakis, GN

dc.contributor.author	Kalkanis, K	en
dc.contributor.author	Tsamasphyros, GJ	en
dc.contributor.author	Papathanasiou, ThK	en
dc.contributor.author	Kanderakis, GN	en
dc.date.accessioned	2014-03-01T01:36:31Z
dc.date.available	2014-03-01T01:36:31Z
dc.date.issued	2011	en
dc.identifier.issn	1546-198X	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/21319
dc.subject	Carbon fibres	en
dc.subject	Composite Patch Repair	en
dc.subject	Fatigue	en
dc.subject	Finite element analysis (FEA)	en
dc.subject	Life prediction	en
dc.subject.classification	Chemistry, Analytical	en
dc.subject.classification	Electrochemistry	en
dc.subject.classification	Instruments & Instrumentation	en
dc.subject.classification	Physics, Applied	en
dc.subject.other	Bonded composite repairs	en
dc.subject.other	Circular holes	en
dc.subject.other	Composite patch repairs	en
dc.subject.other	Crack line	en
dc.subject.other	Damaged structures	en
dc.subject.other	Dielectric sensors	en
dc.subject.other	Experimental investigations	en
dc.subject.other	FE model	en
dc.subject.other	Finite element analysis (FEA)	en
dc.subject.other	Life prediction	en
dc.subject.other	Maximum values	en
dc.subject.other	Metallic structures	en
dc.subject.other	Numerical results	en
dc.subject.other	Optimum placement	en
dc.subject.other	Rectangular plates	en
dc.subject.other	Reinforcement technique	en
dc.subject.other	Representative case	en
dc.subject.other	Smart patch	en
dc.subject.other	Structure geometry	en
dc.subject.other	Carbon fibers	en
dc.subject.other	Cracks	en
dc.subject.other	Dielectric devices	en
dc.subject.other	Fatigue of materials	en
dc.subject.other	Finite element method	en
dc.subject.other	Residual stresses	en
dc.subject.other	Sensors	en
dc.subject.other	Stress analysis	en
dc.subject.other	Three dimensional	en
dc.subject.other	Stress intensity factors	en
dc.title	Numerical and experimental investigation for optimum placement of dielectric sensors to/into a damaged structure	en
heal.type	journalArticle	en
heal.identifier.primary	10.1166/sl.2011.1683	en
heal.identifier.secondary	http://dx.doi.org/10.1166/sl.2011.1683	en
heal.language	English	en
heal.publicationDate	2011	en
heal.abstract	Stress analysis of combined reinforcement techniques for structural restoration of damaged plates is investigated in this paper. After determination and evaluation of the numerical results, an experimental investigation takes place in assessing the practical application. The drilling of stress relieving holes around the area of a crack is considered before the application of Composite Patch Repair (CPR). Stress Intensity Factors (SIF) were calculated by utilizing the Finite Element (FE) method. Within the current work, a representative case of bonded composite repair of a cracked metallic structure is examined and a series of 3D elastic linear-static FE models are developed. These models consist of centrally cracked rectangular plates, in which circular holes of various diameters are drilled above and below the crack line at various distances. SIF reduction is found to be depended on both the holes' diameters and the holes' distances from the crack line. The SIF results taken for an optimally placed set of stress relieving holes, show an improvement of SIF reaching a maximum value of 16%. The experiments were designed according to the numerical results, but also bearing in mind the possibility of incorporating commercially available sensors in the specified structure geometry, thus examining the capability of upgrading to a smart patch. Results demonstrate life increase, and at the same time the capability of housing commercially available sensors in the specified structure geometry. Copyright © 2011 American Scientific Publishers All rights reserved.	en
heal.publisher	AMER SCIENTIFIC PUBLISHERS	en
heal.journalName	Sensor Letters	en
dc.identifier.doi	10.1166/sl.2011.1683	en
dc.identifier.isi	ISI:000294875700005	en
dc.identifier.volume	9	en
dc.identifier.issue	4	en
dc.identifier.spage	1292	en
dc.identifier.epage	1297	en