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Please use this identifier to cite or link to this item: http://hdl.handle.net/10198/4010

Título: Damage localization in laminated composite plates using mode shapes measured by pulsed TV holography
Autor: Santos, J.V. Araújo dos
Lopes, H.
Vaz, M.A.P.
Soares, C.M. Mota
Soares, C.A. Mota
Freitas, M.J.M. de
Palavras-chave: Damage localization
Laminated plate
Mode shape
Pulsed TV holography
Acoustic excitation
Non-destructive inspection
Issue Date: 2006
Editora: ELSEVIER
Citação: 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.
Relatório da Série N.º: 3;84
Resumo: 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.
Descrição: 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.
Arbitragem científica: yes
URI: http://hdl.handle.net/10198/4010
ISSN: 0263-8223
Versão do Editor: 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

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