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Measurement of Acoustoelastic Effect of Surface Wave with an Improved Acoustic Transducer

Published online by Cambridge University Press:  05 May 2011

Yung-Chun Lee  and
Shi Hoa Kuo
Yung-Chun Lee*
Affiliation:
Department of Mechanical Engineering, National Cheng Kung University, Tainan, Taiwan 70101, R.O.C.
Shi Hoa Kuo*
Affiliation:
Department of Mechanical Engineering, National Cheng Kung University, Tainan, Taiwan 70101, R.O.C.
*
*Professor
**Graduate student
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Abstract

A new acoustic transducer and measurement method have been developed for precise measurements of surface wave velocity. This technique is used to investigate the acoustoelastic effect of surface waves in polymethylmethacrylate (PMMA). The transducer utilizes two miniature conical PZT elements for surface wave transmitter and receiver, and hence can be viewed as a point-source/point-receiver (PS/PR) surface wave transducer. Surface waves are excited and detected with the PZT elements and the surface wave velocity can be accurately determined over a small measurement area. Improvement has been made so that the transducer can be used for both conductive and non-conductive materials. The transducer is then applied to measure the acoustoelastic effect of surface wave in a PMMA specimen. The acoustoelastic coefficients are experimental determined.

Keywords

AcoustoelasticityStress measurementPoint-source/point-receiverAcoustic transducerSurface wave.
Type
Articles
Information
Journal of Mechanics , Volume 19 , Issue 4 , December 2003 , pp. 421 - 424
Copyright
Copyright © The Society of Theoretical and Applied Mechanics, R.O.C. 2003

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References

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