Please use this identifier to cite or link to this item: http://hdl.handle.net/10198/4010
Title: Damage localization in laminated composite plates using mode shapes measured by pulsed TV holography
Authors: Santos, J.V. Araújo dos
Lopes, H.
Vaz, M.A.P.
Soares, C.M. Mota
Soares, C.A. Mota
Freitas, M.J.M. de
Keywords: Damage localization
Laminated plate
Mode shape
Pulsed TV holography
Acoustic excitation
Non-destructive inspection
Issue Date: 2006
Publisher: ELSEVIER
Citation: Araújo, J.V.; Lopes, H.; Vaz, M.; Mota Soares, C.M.; Mota Soares, C.A.; Freitas, M.J.M. de (2006) - Damage localization in laminated composite plates using mode shapes measured by pulsed TV holography. Composite Structures. ISSN 0263-8223. p.272-281.
Series/Report no.: 3;84
Abstract: Three methods for the damage localization of impact damage in laminated composite plates, based on their vibrational characteristics, are presented in this paper. These methods use double pulse TV holography with acoustic excitation for mode shapes acquisition and the differences in translations, rotations and curvatures. The rotations and curvatures are obtained by numerical differentiation of mode shapes translations using a differentiation/smoothing technique. The methods are applied to a carbon fiber reinforced epoxy rectangular plate, free in space, subjected to two cases of impact damage. It is shown that the method based on curvatures allows the localization of both cases of damage, which can be undetected by visual, X-ray or C-scan inspections. The best localizations are achieved by selecting and applying the method to the most changed mode.
Description: Three methods for the damage localization of impact damage in laminated composite plates, based on their vibrational characteristics, are presented in this paper. These methods use double pulse TV holography with acoustic excitation for mode shapes acquisition and the differences in translations, rotations and curvatures. The rotations and curvatures are obtained by numerical differentiation of mode shapes translations using a differentiation/smoothing technique. The methods are applied to a carbon fiber reinforced epoxy rectangular plate, free in space, subjected to two cases of impact damage. It is shown that the method based on curvatures allows the localization of both cases of damage, which can be undetected by visual, X-ray or C-scan inspections. The best localizations are achieved by selecting and applying the method to the most changed mode.
Peer review: yes
URI: http://hdl.handle.net/10198/4010
ISSN: 0263-8223
Publisher Version: http://www.sciencedirect.com/science?_ob=ArticleURL&_udi=B6TWP-4KGX8DC-1&_user=2460258&_coverDate=11%2F30%2F2006&_rdoc=1&_fmt=high&_orig=gateway&_origin=gateway&_sort=d&_docanchor=&view=c&_searchStrId=1714232539&_rerunOrigin=google&_acct=C000057407&_version=1&_urlVersion=0&_userid=2460258&md5=0c8f13147b5086890fecd55e87381d45&searchtype=a
Appears in Collections:DMA - Artigos em Revistas Indexados ao ISI/Scopus

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