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Monitoring of Impact Damage Accumulation in GFRP Composites

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Monitoring of Impact Damage Accumulation in GFRP Composites Using Guided Waves and Optical Transmission Scanning


Fiber reinforced polymer (FRP) composites have gained wide acceptance in aviation, space, marine, automotive, sporting, and construction industries due to the multitude of benefits they offer, such as light weight, high specific stiffness, and strength. However, composites are known to suffer damage from low-velocity impacts, such as when tools are dropped onto the surface of the structure, or when it is hit by debris or projectiles. Hence, cost-efficient techniques capable of accurate nondestructive evaluation (NDE) and continuous structural health monitoring (SHM) are desirable for providing vital feedback that could be used to determine the operational limits of a composite structure and prevent its catastrophic failure. In this work, repeated impact damage introduced by drop-weight tests on glass fiber reinforced polymer (GFRP) composite samples was monitored with guided waves (GW), which were excited and sensed by an array of miniature surface-mounted piezoelectric wafers (PZT). Damage sensitive features were extracted from all ultrasonic signals to locate and assess the damage extent using delay-and-sum (DAS) imaging. Finally, the impact damage in the samples was quantitatively evaluated with a novel optical transmission scanning (OTS) technique that provided rapid and non-contact scans of the GFRP specimens. Overall, these techniques have shown good agreement and great potential for robust and accurate NDE and SHM of GFRP composites.


Authors: Oleksii Karpenko, Anton Khomenko, Ermias Koricho, Mahmoodul Haq, Gary Cloud and Lalita Udpa


Conference: CAMX 2016 – Anaheim


SKU/Code: TP16-0122


Pages: 13

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