Prediction and measurement of Lamb wave from debondings at structural features in composite laminates

Ng, Ching Tai and Veidt, Martin (2013). Prediction and measurement of Lamb wave from debondings at structural features in composite laminates. In: Structural Health Monitoring: Research and Applications. 4th Asia Pacific Workshop on Structural Health Monitoring, Melbourne, VIC Australia, (139-148). 5-7 December 2012. doi:10.4028/www.scientific.net/KEM.558.139

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Author Ng, Ching Tai
Veidt, Martin
Title of paper Prediction and measurement of Lamb wave from debondings at structural features in composite laminates
Conference name 4th Asia Pacific Workshop on Structural Health Monitoring
Conference location Melbourne, VIC Australia
Conference dates 5-7 December 2012
Proceedings title Structural Health Monitoring: Research and Applications   Check publisher's open access policy
Journal name Key Engineering Materials   Check publisher's open access policy
Place of Publication Stafa-Zurich, Switzerland
Publisher Trans Tech Publications Ltd.
Publication Year 2013
Year available 2013
Sub-type Fully published paper
DOI 10.4028/www.scientific.net/KEM.558.139
Open Access Status
ISBN 9783037857151
ISSN 1013-9826
Volume 558
Start page 139
End page 148
Total pages 10
Abstract/Summary 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-dimensional (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 Lamb 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.
Subjects 2500 Materials Science
2211 Mechanics of Materials
2210 Mechanical Engineering
Keyword Composite laminates
Debonding
Finite element
Lamb wave
Scattering
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ

 
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Created: Fri, 29 Nov 2013, 03:30:29 EST by System User on behalf of School of Mechanical and Mining Engineering