A hybrid technique for damage detection on laminated plates

• Autor(es): Lopes, H. ; Santos, J.V. Araújo dos ; Guedes, R.M. ; Vaz, M.A.P.
• Data: 2006
• Identificador Persistente: http://hdl.handle.net/10198/4232
• Origem: Biblioteca Digital do IPB
• Assunto(s): Damage detection; laminated plates
• Tipo de Documento: Documento de conferência
• Idioma: Inglês

Descrição

This work presents an experimental/numerical technique for delamination damage detection on thin laminated composite plates. The delamination is identified using a technique based on the curvature differences of the plate modes shapes measured before and after impact damage. The natural frequencies are extracted from Frequency Response Functions. A double pulse TV holography is used for no-contact and accurate measurement of the amplitude mode shapes. The curvature is obtained by applying an improved differentiation /smoothing technique to the experimental data. Finally, the curvatures of each mode are subtracted and the damage is located.