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, Luís Deán-Ben Xosé, Cristina Trillo, Ángel F. Doval, José L. Fernandez, Faisal Amlani, 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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