Single transducer pair lamb wave time reversal for damage detection in composite laminates

Normandin, Benjamin and Veidt, Martin (2013). Single transducer pair lamb wave time reversal for damage detection in composite laminates. In: Structural Health Monitoring: Research and Applications. 4th Asia Pacific Workshop on Structural Health Monitoring, Melbourne, VIC Australia, (205-217). 5-7 December 2012. doi:10.4028/www.scientific.net/KEM.558.205

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Author Normandin, Benjamin
Veidt, Martin
Title of paper Single transducer pair lamb wave time reversal for damage detection 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
Publication Year 2013
Year available 2013
Sub-type Fully published paper
DOI 10.4028/www.scientific.net/KEM.558.205
ISBN 9783037857151
ISSN 1013-9826
Volume 558
Start page 205
End page 217
Total pages 13
Collection year 2014
Language eng
Abstract/Summary This paper investigates the potential of single transducer pair guided waves time reversal to detect damage in composite laminates. According to dynamic reciprocity of Lamb waves propagation in linear media, the time reversal process should reconstruct the original signal. The similarity of original and reconstructed time signals is calculated for different damage types using numerical and experimental studies with the aim to investigate, if the interaction of the wave pulse with in homogeneities introduces any nonlinearity that time reversibility breaks down and single transducer pair time reversal could be used as damage diagnostics tool. 3D explicit finite element analysis is used for the numerical simulation and laser Doppler vibrometry is used to capture out-of plane displacement time histories excited by an adhesively bonded piezoceramic transducer disc in the experimental time reversal process. In the case of an undamaged composite laminate the similarity index used to quantify the similarity of the original and reconstructed wave pulses is better than 95%. The similarity index is smaller for laminates with artificial damages including embedded fluoro polymer films to simulate delamination damage, through holes and bonded mass inhomogeneities. Although numerical and experimental similarity indices are smaller at higher frequencies, there is no clear evidence that single transducer pair time reversibility breaks down andrepresents a reliable damage diagnostics tool.
Subjects 2500 Materials Science
2211 Mechanics of Materials
2210 Mechanical Engineering
Keyword Fibre-reinforced composite laminates
Lamb waves
Time reversal
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ

 
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Created: Tue, 19 Nov 2013, 11:43:41 EST by Katie Gollschewski on behalf of School of Mechanical and Mining Engineering