Nondestructive testing technique combining ultrasonic Lamb waves and double-pulse TV holography

Daniel Cernadas; C. Trillo; Angel F. Doval; Carlos Lopez; Benito Vasquez Dorrio; J. L. Fernandez; Mariano Perez-Amor

doi:10.1117/12.468155

22 May 2002 Nondestructive testing technique combining ultrasonic Lamb waves and double-pulse TV holography

Daniel Cernadas, C. Trillo, Angel F. Doval, Carlos Lopez, Benito Vasquez Dorrio, J. L. Fernandez, Mariano Perez-Amor

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.

Citation Download Citation

Daniel Cernadas, C. Trillo, Angel F. Doval, Carlos Lopez, Benito Vasquez Dorrio, J. L. Fernandez, and 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); https://doi.org/10.1117/12.468155

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