Abstract
Guided Ultrasonic Waves (GUWs) are increasingly considered in the nondestructive testing of engineering systems. This paper shows a non-contact laser/immersion transducer system for the detection of damage in submerged structures. A pulsed laser was used to generate stress waves in an aluminium plate immersed in water; a pair of immersion transducers was used to detect the signals. The waveforms were processed using wavelets to extract information about the attenuation of the propagating modes. Damage was simulated by devising a notch and a circle on the face of the plate exposed to the probing system.
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Acknowledgements
Partial support for this work was provided by the U.S. NSF grants CMMI 0825983 and CMMI 1026457. Dr. Han performed this research as a visiting professor at the University of Pittsburgh with the support of the NSF of China, grant 50668001.
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Rizzo, P., Pistone, E., Werntges, P., Han, J., Ni, X. (2013). Inspection of Underwater Metallic Plates by means of Laser Ultrasound. In: Güneş, O., Akkaya, Y. (eds) Nondestructive Testing of Materials and Structures. RILEM Bookseries, vol 6. Springer, Dordrecht. https://doi.org/10.1007/978-94-007-0723-8_96
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DOI: https://doi.org/10.1007/978-94-007-0723-8_96
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