Please use this identifier to cite or link to this item: http://hdl.handle.net/2440/83729
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Type: Conference paper
Title: Prediction and measurement of lamb wave from debondings at structural features in composite laminates
Author: Ng, C.
Veidt, M.
Citation: Key Engineering Materials, 2013; 558:139-148
Publisher: Trans Tech Publications
Publisher Place: Zurich, Switzerland
Issue Date: 2013
Series/Report no.: Key Engineering Materials
ISBN: 9783037857151
ISSN: 1013-9826
1662-9795
Conference Name: Asia-Pacific Workshop on Structural Health Monitoring (2012 : Melbourne, Australia)
Statement of
Responsibility: 
Ching-Tai Ng, Martin Veidt
Abstract: The interaction of the fundamental anti-symmetric Lamb wave (A0) with debondings at structural features is investigated using experimental data and finite element (FE) simulations. in this study explicit three-dimentional (3D) FE simulations are employed, which allows the study of the scattered wave along different propagation directions. Good agreement between the FE predictions and the measurements are obtained that demonstrates that the 3D FE scattering model is able to accurately predict the Lamb wave scattering characteristics at debondings. The study show that the characteristics of Lamb wave reflected from the debondings at the structure feature is much more complicated than that from defects in flat composite laminates. Parameter studies show that the backward and forward scattering coefficient of Lamb wave is a function of debonding size to wavelength ratio and debonding location. This shows the potential of employing Lmab wave to identify the size and monitor the growth of the debondings. The findings of the study provide improved physical insights into the scattering phenomena, which are important to further advance damage detection techniques for complex structures made by composite laminates.
Keywords: Composite Laminate; Debonding; Finite Element (FE); Lamb Wave; Scattering
Rights: ©(2013) Trans Tech Publications, Switzerland
RMID: 0020132343
DOI: 10.4028/www.scientific.net/KEM.558.139
Appears in Collections:Civil and Environmental Engineering publications

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