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Damage localization in laminated composite plates using mode shapes measured by pulsed TV holography

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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.
Autores principais:Santos, J.V. Araújo
Outros Autores:Lopes, Hernani; Vaz, M.A.P.; Soares, C.M. Mota; Freitas, M.J.M.
Assunto:Damage localization Laminated plate Mode shape Pulsed TV holography Acoustic excitation Non-destructive inspection
Ano:2006
País:Portugal
Tipo de documento:artigo
Tipo de acesso:acesso restrito
Instituição associada:Instituto Politécnico de Bragança
Idioma:inglês
Origem:Biblioteca Digital do IPB

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