Nondestructive evaluation of debonding in composites using air-coupled coda wave analysis and local defect resonance techniques
Zhiqiang Li,
Jingpin Jiao,
Xiangfeng Zheng
et al.
Abstract:Low acoustic energy conversion efficiency is a major challenge for air-coupled ultrasonic technology. In the determination of the lift-off distance of air-coupled sensors, there is a balance between the acoustic energy attenuation and the difficulty of extracting defect information. In this study, an air-coupled local defect resonance (LDR) technique with coda wave analysis is proposed for the nondestructive evaluation of debonding in composites. A sensor consisting of 19 elements was used to simultaneously ex… Show more
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