22 May 2002 Nondestructive testing technique combining ultrasonic Lamb waves and double-pulse TV holography
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Proceedings Volume 4827, Fifth International Conference on Vibration Measurements by Laser Techniques: Advances and Applications; (2002) https://doi.org/10.1117/12.468155
Event: Fifth International Conference on Vibration Measurements by Laser Techniques, 2002, Ancona, Italy
Abstract
The combination of ultrasonics with optics has led to the development of emergent technologies for nondestructive testing with outstanding capabilities. In this work we describe a combination that, in our knowledge, was up to now unexplored, directed to the detection of cracks and other types of flaws in metallic plates of medium thickness (several millimeters). We selected a special kind of surface acoustic waves, i.e. Lamb waves, to explore the volume of the plates in the search for flaws, while a whole field interferometric technique, namely double-pulse TV holography, is employed to generate a map of the surface displacements in which the signature of the defects can be seen as a perturbation of the initially smooth wavefronts. Several examples of detection of artificially generated flaws are presented.
© (2002) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Daniel Cernadas, Daniel Cernadas, C. Trillo, C. Trillo, Angel F. Doval, Angel F. Doval, Carlos Lopez, Carlos Lopez, Benito Vasquez Dorrio, Benito Vasquez Dorrio, J. L. Fernandez, J. L. Fernandez, Mariano Perez-Amor, Mariano Perez-Amor, } "Nondestructive testing technique combining ultrasonic Lamb waves and double-pulse TV holography", Proc. SPIE 4827, Fifth International Conference on Vibration Measurements by Laser Techniques: Advances and Applications, (22 May 2002); doi: 10.1117/12.468155; https://doi.org/10.1117/12.468155
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