Measurement of material nonlinearity using surface acoustic wave parametric interaction and laser ultrasonics

A dual frequency mixing technique has been developed for measuring velocity changes caused by material nonlinearity. The technique is based on the parametric interaction between two surface acoustic waves (SAWs): The low frequency pump SAW generated by a transducer and the high frequency probe SAW g...

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Bibliographic Details
Published in:The Journal of the Acoustical Society of America 2011-04, Vol.129 (4), p.1721-1728
Main Authors: Stratoudaki, Theodosia, Ellwood, Robert, Sharples, Steve, Clark, Matthew, Somekh, Michael G., Collison, Ian J.
Format: Article
Language:English
Subjects:
Acoustics
Aluminum
Construction Materials
Electronics
Lasers
Models, Theoretical
Nonlinear Dynamics
Nonlinearity
Pumps
Safety
Saws
Signal Detection, Psychological
Stresses
Surface acoustic waves
Surface Properties
Transducers
Ultrasonics - methods
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Summary:A dual frequency mixing technique has been developed for measuring velocity changes caused by material nonlinearity. The technique is based on the parametric interaction between two surface acoustic waves (SAWs): The low frequency pump SAW generated by a transducer and the high frequency probe SAW generated and detected using laser ultrasonics. The pump SAW stresses the material under the probe SAW. The stress (typically
ISSN:0001-4966
1520-8524
DOI:10.1121/1.3560945