HEXAGONAL ARRAY STRUCTURE FOR 2D NDE APPLICATIONS

Journal Article · Mon Feb 22 00:00:00 EST 2010 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.3362496· OSTI ID:21371045

Dziewierz, J; Ramadas, S N; Gachagan, A; O'Leary, R L ^[1]

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1. Centre for Ultrasonic Engineering, Department of Electronic and Electrical Engineering, University of Strathclyde, Glasgow, G1 1XW (United Kingdom)

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).

• OSTI ID: 21371045
• Journal Information: AIP Conference Proceedings, Vol. 1211, 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; ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

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