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Robertson, D. C.
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Publications (5/5 displayed)
- 2006Comparison of the performance of pmn-pt single-crystal and ceramic composite arrays for NDE applicationscitations
- 2006Comparison of the frequency and physical nature of the lowest order parasitic mode in single crystal and ceramic 2-2 and 1-3 piezoelectric composite transducerscitations
- 2004Minimisation of mechanical cross talk in periodic piezoelectric composite arrayscitations
- 2003Comparison of mechanical cross talk in single crystal and ceramic periodic piezoelectric composite arrayscitations
- 2002Lamb wave suppression in periodic 1-3 piezoelectric composite transducerscitations
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document
Lamb wave suppression in periodic 1-3 piezoelectric composite transducers
Abstract
This paper investigates suppression of Lamb waves in piezoelectric composite transducers by matching their frequency to the even harmonics of the device thickness mode. This was done by a combination of experimental measurement on a number of transducers along with simulations using the finite element code PzFlex. Both 2-2 and 1-3 composites made from the single crystal materials pzn-4.5%pt and pzn-8%pt were investigated along with composites made from pzt5h ceramic. The theory is supported by means of experimental impedance analysis and laser scanning of surface displacement, with good agreement demonstrated.