28th Congress of the International Council of the Aeronautical Sciences, 23 - 28 September 2012, Brisbane, Australia
WAVELET-BASED ACTIVE SENSING FOR QUANTITATIVE ASSESSMENT OF THROUGH-THICKNESS CRACK SIZE AND ANGLE IN COMPOSITE PLATES
Z. Soltani, M. Ekhtiari, A. Abedian
Sharif Univ. of Technology, Iran
Keywords: lamb waves, piezoelectric active sensor, composite plate, finite element method, wavelet transform
A dual-PZT actuation scheme is applied to generate the fundamental symmetric Lamb wave mode, on quasi-isotropic CF-EP laminate plate. Then a wavelet-based signal processing SHM technique is developed to detect through-thickness crack of different sizes/angels and the response signals are processed to extract damage-sensitive features from the original signals.
view full paper