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Published September 2010 | Published
Journal Article Open

Numerical modeling and measurement by pulsed television holography of ultrasonic displacement maps in plates with through-thickness defects

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.

Additional Information

© 2010 Society of Photo-Optical Instrumentation Engineers. Paper 100096PR received Feb. 4, 2010; revised manuscript received Jun. 21, 2010; accepted for publication Jul. 13, 2010; published online Sep. 30, 2010. This work was cofunded by the Spanish Ministerio de Ciencia e Innovación and by the European Comission ERDF in the context of the Plan Nacional de I+D+i project number DPI2008-02709, and by the Dirección Xeral de Investigación, Desenvolvemento e Innovación da Xunta de Galicia in the context of the Plan Galego de IDIT project number INCITE08PXIB303252PR. Supplementary cofunding from the Universidade de Vigo project number I608122F64102 is also acknowledged. Amlani and Bruno gratefully acknowledge support by the Air Force Office of Scientific Research and the National Science Foundation.

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August 22, 2023
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