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Title: HEXAGONAL ARRAY STRUCTURE FOR 2D NDE APPLICATIONS

This paper describes a combination of simulation and experimentation to evaluate the advantages offered by utilizing a hexagonal shaped array element in a 2D NDE array structure. The active material is a 1-3 connectivity piezoelectric composite structure incorporating triangular shaped pillars--each hexagonal array element comprising six triangular pillars. A combination of PZFlex, COMSOL and Matlab has been used to simulate the behavior of this device microstructure, for operation around 2.25 MHz, with unimodal behavior and low levels of mechanical cross-coupling predicted. Furthermore, the application of hexagonal array elements enables the array aperture to increase by approximately 30%, compared to a conventional orthogonal array matrix and hence will provide enhanced volumetric coverage and SNR. Prototype array configurations demonstrate good corroboration of the theoretically predicted mechanical cross-coupling between adjacent array elements (approx23 dB).
Authors:
; ; ;  [1]
  1. Centre for Ultrasonic Engineering, Department of Electronic and Electrical Engineering, University of Strathclyde, Glasgow, G1 1XW (United Kingdom)
Publication Date:
OSTI Identifier:
21371045
Resource Type:
Journal Article
Resource Relation:
Journal Name: AIP Conference Proceedings; Journal Volume: 1211; Journal Issue: 1; Conference: Review of progress in quantitative nondestructive evaluation, Kingston, RI (United States), 26-31 Jul 2009; Other Information: DOI: 10.1063/1.3362496; (c) 2010 American Institute of Physics
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; APERTURES; C CODES; CERAMICS; COMPUTERIZED SIMULATION; COUPLING; FINITE ELEMENT METHOD; M CODES; MHZ RANGE; MICROSTRUCTURE; NONDESTRUCTIVE TESTING; P CODES; PIEZOELECTRICITY CALCULATION METHODS; COMPUTER CODES; ELECTRICITY; FREQUENCY RANGE; MATERIALS TESTING; MATHEMATICAL SOLUTIONS; NUMERICAL SOLUTION; OPENINGS; SIMULATION; TESTING