Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/27201
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dc.contributor.authorLam, PMen_US
dc.contributor.authorLau, KTen_US
dc.contributor.authorLing, HYen_US
dc.contributor.authorSu, Zen_US
dc.contributor.authorTam, HYen_US
dc.date.accessioned2014-12-19T07:07:07Z-
dc.date.available2014-12-19T07:07:07Z-
dc.date.issued2009-
dc.identifier.citationOptics and lasers in engineering, 2009, v. 47, no. 10, p. 1049-1055en_US
dc.identifier.issn0143-8166-
dc.identifier.urihttp://hdl.handle.net/10397/27201-
dc.description.abstractIn this paper, an active damage detection system for composite laminates is introduced. A fiber Bragg grating (FBG) was employed as an embedded sensor for detecting ultrasonic Lamb wave generated by a piezoelectric (PZT) actuator, inside the laminates. There were two different configurations for the system, making use of a broadband light source and a laser source, respectively. It was found that the use of a laser source could provide a higher sensitivity, so it was preferred in an ultrasonic signal acquisition unit for damage detection. When a delamination is developed in composite structures, the propagation characteristics of Lamb wave is then changed. According to altered signals, the types and natures of delamination inside the structures can be evaluated. In this experiment, glass fiber-reinforced epoxy (GFRP) composite beams were used to study the feasibility of our proposed detection technique. FBG sensors were embedded in different layers of the composite beams. The responses of FBG sensors from both intact and delaminated composite beams were then compared. Finally, the acquired Lamb wave signals corresponding to different delamination sizes and locations were examined.en_US
dc.description.sponsorshipDepartment of Electrical Engineeringen_US
dc.language.isoenen_US
dc.relation.ispartofOptics and Lasers in Engineeringen_US
dc.subjectComposite structuresen_US
dc.subjectDamage detectionen_US
dc.subjectDelaminationen_US
dc.subjectFiber Bragg grating (FBG)en_US
dc.subjectLamb waveen_US
dc.titleAcousto-ultrasonic sensing for delaminated GFRP composites using an embedded FBG sensoren_US
dc.typeJournal/Magazine Articleen_US
dc.identifier.spage1049-
dc.identifier.epage1055-
dc.identifier.volume47-
dc.identifier.issue10-
dc.identifier.doi10.1016/j.optlaseng.2009.01.010-
dc.identifier.scopus2-s2.0-68549089042-
dc.identifier.rosgroupidr45937-
dc.description.ros2009-2010 > Academic research: refereed > Publication in refereed journal-
Appears in Collections:Journal/Magazine Article
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