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Optical Engineering

Numerical modeling and measurement by pulsed television holography of ultrasonic displacement maps in plates with through-thickness defects
Author(s): Jose Carlos López-Vázquez; Luís Deán-Ben Xosé; Cristina Trillo; Ángel F. Doval; José L. Fernandez; Faisal Amlani; Oscar P. Bruno
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Paper Abstract

We present a novel numerical modeling of ultrasonic Lamb and Rayleigh wave propagation and scattering by through-thickness defects like holes and slots in homogeneous plates, and its experimental verification in both near and far field by a self-developed pulsed TV holography system. In contrast to rigorous vectorial formulation of elasticity theory, our model is based on the 2-D scalar wave equation over the plate surface, with specific boundary conditions in the defects and plate edges. The experimental data include complex amplitude maps of the out-of-plane displacements of the plate surface, obtained by a two-step spatiotemporal Fourier transform method. We find a fair match between the numerical and experimental results, which allows for quantitative characterization of the defects.

Paper Details

Date Published: 1 September 2010
PDF: 10 pages
Opt. Eng. 49(9) 095802 doi: 10.1117/1.3484953
Published in: Optical Engineering Volume 49, Issue 9
Show Author Affiliations
Jose Carlos López-Vázquez, Univ. de Vigo (Spain)
Luís Deán-Ben Xosé, Univ. de Vigo (Spain)
Cristina Trillo, Univ. de Vigo (Spain)
Ángel F. Doval, Univ. de Vigo (Spain)
José L. Fernandez, Univ. de Vigo (Spain)
Faisal Amlani, California Institute of Technology (United States)
Oscar P. Bruno, California Institute of Technology (United States)

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