Ultrasonic high frequency lamb waves for evaluation of plate structures

The potentials of high frequency Lamb wave modes are investigated in the inspection of plate-like structures. The wave propagation characteristics of higher order wave modes and the corresponding sensitivity and detectability are studied. Finite element simulations are carried out using infinite ele...

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Bibliographic Details
Published in:Acoustical physics 2017-07, Vol.63 (4), p.402-409
Main Authors: Ranjbar Naserabadi, M. J., Sodagar, S.
Format: Article
Language:English
Subjects:
Acoustics
Classical Problems of Linear Acoustics and Wave Theory
Computer simulation
Finite element method
Inspection
Lamb waves
Mathematical analysis
Mathematical models
Physics
Physics and Astronomy
Plates (structural members)
Ultrasonic testing
Wave propagation
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Summary:The potentials of high frequency Lamb wave modes are investigated in the inspection of plate-like structures. The wave propagation characteristics of higher order wave modes and the corresponding sensitivity and detectability are studied. Finite element simulations are carried out using infinite elements to model the ultrasonic wedge transducer and the inspection system. Experimental pulse–echo measurements are conducted to verify the influence of different modes characteristics predicted from the finite element simulations. The experimental measurements show a good agreement with the obtained numerical results for the fundamental modes, S 0 and A 0 , and the higher order modes, S 1 and A 1 , at 4 MHz mm of frequency–thickness.
ISSN:1063-7710
1562-6865
DOI:10.1134/S106377101704011X