Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/16222
Title: Detection of delamination damage in composite plates using energy spectrum of structural dynamic responses decomposed by wavelet analysis
Authors: Yan, YJ
Yam, LH
Keywords: Composite plate
Delamination damage
Dynamic response
Energy spectrum
Wavelet transform
Issue Date: 2004
Publisher: Pergamon Press
Source: Computers & structures, 2004, v. 82, no. 4-5, p. 347-358 How to cite?
Journal: Computers & structures 
Abstract: Damage detection of local and tiny delamination in a laminated composite plate is studied in this paper using piezoelectric patches embedded in composite plate and the energy distribution of structural dynamic responses decomposed in various frequency bands by wavelet packet analysis. This method is based on energy distribution of structural vibration sub-signal and can be in situ implemented using a few piezoelectric patch sensors and actuators embedded in the composite plate. The obtained results show that the method for structural damage detection proposed in this paper is much more sensitive than the existing methods. Using this method, a delamination area of only 0.13% of the total area of the composite plate may be detected. The results show that numerical simulation are quite consistent with experiment results.
URI: http://hdl.handle.net/10397/16222
ISSN: 0045-7949
DOI: 10.1016/j.compstruc.2003.11.002
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