Burrows, Susan, Dutton, B. (Ben) and Dixon, S. (2012) Laser generation of lamb waves for defect detection : experimental methods and finite element modeling. IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control, Vol.59 (No.1). pp. 82-89. doi:10.1109/TUFFC.2012.2158 ISSN 0885-3010.

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Abstract

The propagation of Lamb waves generated by a pulsed laser beam in an aluminum sheet is modeled using finite element analysis, and the interaction with defects is studied and compared to experimental results. The ultrasonic Lamb waves are detected by an electromagnetic acoustic transducer (EMAT). The frequency content of the received wave is shown to be enhanced when the generation point is situated directly over the defect in both the modeled and experimental cases. Time-frequency analysis using a Wigner transform has enabled individual modes to be identified.

Item Type:	Journal Article
Subjects:	Q Science > QC Physics
Divisions:	Faculty of Science, Engineering and Medicine > Science > Physics
Journal or Publication Title:	IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control
Publisher:	IEEE
ISSN:	0885-3010
Official Date:	January 2012
Dates:	Date Event January 2012 Published
Volume:	Vol.59
Number:	No.1
Page Range:	pp. 82-89
DOI:	10.1109/TUFFC.2012.2158
Status:	Peer Reviewed
Publication Status:	Published
Access rights to Published version:	Restricted or Subscription Access

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