Laser ultrasonic propagation visualization in plates with liquid boundaries

초록

Existing NDT techniques based on Lamb wave obtained by contact method were difficult to perform inspection for the target structure in water. So this study presents a non-contact NDT/E technique (such as laser-based ultrasonic generator/sensor) with ultrasonic wave propagation imaging algorithm for damage visualizatio in submerged aluminum plate. The experimental case studies were performed to predict the size and shape of the damage for test speciment with three different cases