Sensitivity of the Acoustic Impact Technique in Characterizing Defects/Damage in Laminated Composites

TL;DRAbstract

The sensitivity of the Acoustic Impact Technique (AIT) has been investigated in detecting delaminations, impact and moisture induced damage in laminated composites. The use of Acoustic Impact Technique has shown encouraging results by previous investigators in identifying defects like delamination and disbonds in honeycomb structures. Very limited work has been reported in the literature about the utility of AIT as a NDT tool for testing laminated structures. The present work investigates the sensitiveness of the AIT method in detecting delamination in laminated composites in terms of size, shape, position and degree of concentration. The technique has also been applied in identifying low velocity impact and moisture induced damage in laminated composites. The significant advantage of AIT is that this technique is attractive for field applications. The AIT method involves striking the structure with an instrumented impacter in the region of interest and recording the time history of th

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