1 September 2010 Numerical modeling and measurement by pulsed television holography of ultrasonic displacement maps in plates with through-thickness defects
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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.
© (2010) Society of Photo-Optical Instrumentation Engineers (SPIE)
Jose Carlos López-Vázquez, Jose Carlos López-Vázquez, Luís Deán-Ben Xosé, Luís Deán-Ben Xosé, Cristina Trillo, Cristina Trillo, Ángel F. Doval, Ángel F. Doval, José L. Fernandez, José L. Fernandez, Faisal Amlani, Faisal Amlani, Oscar P. Bruno, Oscar P. Bruno, } "Numerical modeling and measurement by pulsed television holography of ultrasonic displacement maps in plates with through-thickness defects," Optical Engineering 49(9), 095802 (1 September 2010). https://doi.org/10.1117/1.3484953 . Submission:
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