Performance of periodic piezoelectric composite arrays incorporating a passive phase exhibiting anisotropic properties

O'Leary, R.L. and Parr, A.C.S. and Troge, A. and Pethrick, R.A. and Hayward, G.; (2006) Performance of periodic piezoelectric composite arrays incorporating a passive phase exhibiting anisotropic properties. In: IEEE Ultrasonics Symposium, 2005. IEEE, NLD, pp. 1073-1076. ISBN 0780393821 (https://doi.org/10.1109/ULTSYM.2005.1603036)

[thumbnail of QNDE_2006_Gachagan.pdf]
Preview
 PDF. Filename: QNDE_2006_Gachagan.pdf
Final Published Version
Download (2MB)| Preview

Abstract

This paper explores the minimisation of interelement cross talk in 1-D and 2-D periodic composite array structures through the incorporation of a passive phase exhibiting anisotropic elastic properties. Initially the PZFlex finite element code was used to monitor array aperture response as a function of material properties. It is shown that in array structures comprising passive polymer materials possessing low longitudinal loss and high shear loss, inter-element mechanical cross talk is reduced, without a concomitant reduction in element sensitivity. A number of polymer materials with the desired properties were synthesised and their elastic character confirmed through a program of materials characterisation. Finally, a range of experimental devices exhibiting improved directional response, as a result of a significant reduction in interelement cross talk, are presented and the predicted array characteristics are shown to compare favourably in each case.

ORCID iDs

O'Leary, R.L. ORCID logoORCID: https://orcid.org/0000-0002-4092-2101, Parr, A.C.S., Troge, A., Pethrick, R.A. and Hayward, G.;
CORE (COnnecting REpositories)