Damage detection in underwater composite structures using ultrasonic guided waves

Fei Yan; Owen M. Malinowski; Xiang Zhao; Joseph L. Rose

doi:10.1117/12.917727

20 April 2012 Damage detection in underwater composite structures using ultrasonic guided waves

Fei Yan, Owen M. Malinowski, Xiang Zhao, Joseph L. Rose

Proceedings Volume 8348, Health Monitoring of Structural and Biological Systems 2012; 83482P (2012) https://doi.org/10.1117/12.917727
Event: SPIE Smart Structures and Materials + Nondestructive Evaluation and Health Monitoring, 2012, San Diego, California, United States

Abstract

An ultrasonic guided wave based damage detection technique has been developed for structural health monitoring (SHM) of composite structures submerged in water. Specially designed guided wave transducers are utilized to selectively excite and receive guided waves with dominant shear horizontal particle displacements. It has been shown that the SH type waves are insensitive to water loading conditions. With appropriate water sealing, the transducers can be applied to composite structures submerged in water. The guided wave signals collected from an underwater composite structure are almost identical to the signals that are obtained before the structure is submerged. Experiments have been conducted to demonstrate the feasibility of damage detection in underwater composite structures. A thick carbon/epoxy composite beam is used as the test sample. Excellent damage detection results were obtained for both dry and underwater tests.

Citation Download Citation

Fei Yan, Owen M. Malinowski, Xiang Zhao, and Joseph L. Rose "Damage detection in underwater composite structures using ultrasonic guided waves", Proc. SPIE 8348, Health Monitoring of Structural and Biological Systems 2012, 83482P (20 April 2012); https://doi.org/10.1117/12.917727

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