López-Vázquez, J. Carlos and Deán-Ben, X. Luís and Trillo, Cristina and Doval, Ángel F. and Fernández, José L. and Amlani, Faisal and Bruno, Oscar P. (2010) Numerical modeling and measurement by pulsed television holography of ultrasonic displacement maps in plates with through-thickness defects. Optical Engineering, 49 (9). Art. No. 095802. ISSN 0091-3286 http://resolver.caltech.edu/CaltechAUTHORS:20101025-104450688
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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.|
|Subject Keywords:||pulsed television holography; nondestructive testing; ultrasonics; elastic waves; plates|
|Classification Code:||PACS: 81.70.Cv; 43.25.-x; 83.60.Uv; 42.40.-i; 46.70.De|
|Official Citation:||Numerical modeling and measurement by pulsed television holography of ultrasonic displacement maps in plates with through-thickness defects J. Carlos Lopez-Vazquez, X. Luis Dean-Ben, Cristina Trillo, Angel F. Doval, Jose L. Fernandez, Faisal Amlani, and Oscar P. Bruno, Opt. Eng. 49, 095802 (2010), DOI:10.1117/1.3484953|
|Usage Policy:||No commercial reproduction, distribution, display or performance rights in this work are provided.|
|Deposited By:||Tony Diaz|
|Deposited On:||30 Nov 2010 00:04|
|Last Modified:||26 Dec 2012 12:33|
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