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Open Access research with a European policy impact...

The Strathprints institutional repository is a digital archive of University of Strathclyde's Open Access research outputs. Strathprints provides access to thousands of Open Access research papers by Strathclyde researchers, including by researchers from the European Policies Research Centre (EPRC).

EPRC is a leading institute in Europe for comparative research on public policy, with a particular focus on regional development policies. Spanning 30 European countries, EPRC research programmes have a strong emphasis on applied research and knowledge exchange, including the provision of policy advice to EU institutions and national and sub-national government authorities throughout Europe.

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Piezoelectric materials for application in low profile interdigital transducer designs

Gachagan, Anthony and Reynolds, P. and Hayward, Gordon and Monkhouse, R and Cawley, P (1997) Piezoelectric materials for application in low profile interdigital transducer designs. In: 1997 IEEE Ultrasonics Symposium Proceedings. IEEE, New York, pp. 1025-1028. ISBN 0780341538

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Abstract

This paper presents a comparative study between piezopolymer (PVDF) and piezo-platelet active layers in flexible interdigital transducer (IDT) designs for the generation of ultrasonic Lamb waves in thin plate structures. Initially, the pulse-echo response in steel was evaluated, where the piezo-platelet transducer demonstrates significant sensitivity advantage over the PVDF devices. The mechanical behaviour of each transducer was further investigated using a laser interferometer scanner to measure surface displacement and evaluate the extent of cross coupling and electrode pattern on the IDT response. Furthermore, finite element modelling has been utilised to evaluate the IDT coupling efficiency for the generation of a particular ultrasonic Lamb wave mode. Interestingly, it is shown that the properties of each transducer tend to be complementary with respect to a particular application. The piezo-platelet materials possess distinct advantages for generation of in plane, symmetric modes, especially for operation in composite plates, while the PVDF, although less efficient, has advantages with regard to cost and flexibility for the generation of anti-symmetric modes in metallic plates.