Damage localization in laminated composite plates using double pulse-electronic...

• Author(s): Santos, J.V. Araújo dos ; Lopes, H. ; Vaz, M.A.P. ; Soares, C.M. Mota ; Soares, C.A. Mota ; Freitas, M.J.M. de
• Date: 2006
• Persistent ID: http://hdl.handle.net/10198/4229
• Origin: Biblioteca Digital do IPB
• Subject(s): Damage localization; Laminated plate; Mode shape curvature; Pulse- electronic holographic interferometry; Acoustic excitation; Non destructive inspection.
• Document Type: Conference Object
• Language: English

Description

One method for the damage localization of impact damage in laminated composite plates, based on their vibrational characteristics, is presented in this paper. This method uses double pulse-electronic holographic interferometry for mode shapes acquisition and the differences in curvatures. The rotations and curvatures are numerically obtained. The method is applied to a carbon fibre reinforced epoxy rectangular plate, free in space, subjected to two cases of impact damage. It is shown that the method based on curvatures allows for 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.