Sandwich Panels Evaluation

Contact Laser Ultrasound Evaluation (CLUE) method makes it possible to enhance spatial resolution at relatively lower frequency band then conventional ultrasonic testing. The advantage of CLUE is the possibility to distinguish the acoustic wave reflection at the soft or rigid boundary. This feature can be effectively used for the investigation of disbonding in laminate structures.
 


The detection of delamination in the upper and lower adhesive layers is well defined by the optoacoustic signal. As an example, the results for a three-layer aluminum sample are performed.