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Characterizing Damage Development in Cross-ply Laminates Using Simulated Acoustic Emission

Acoustic emission testing (AE) is an important tool in structural health monitoring of composite materials. Characterization of service-induced damage in a component in service would be a major step in this technology. In this direction, the present study examines simulated acoustic emission signals from cross-ply composite laminates. Tensile tests were performed on test specimens, and pencil lead breaks (PLB) were done at various loads until failure. AE data were acquired using pinducer ultrasonic sensors, and the data were analyzed in order to identify damage development in the specimens using variation in the PLB data. It was seen that different analysis techniques can be used to monitor damage development.

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