Investigation to Local Defect Resonance for Non-Destructive Testing of Composites†
AbstractLocal defect resonance (LDR) makes use of high frequency vibrations to get a localized resonant activation of a defective region. In this study, the LDR behavior of carbon fiber reinforced polymer (CFRP) coupons with three different types of damages is investigated using broadband measurements obtained with a scanning laser Doppler vibrometer (SLDV). First, the LDR response of flat bottom holes of different depths and sizes is evaluated using a signal-to-noise ratio. Next, results are obtained for ETFE inserts where the difference between (artificial) delaminations and inserts is outlined. At last, the vibrational response of a CFRP coupon with barely visible impact damage is investigated. This type of damage has a more complex structure, and it is shown that frequency band data (an alternative to the single frequency LDR) performs well in identifying such complex damage.
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Segers, J.; Kersemans, M.; Verboven, E.; Hedayatrasa, S.; Calderon, J.; Paepegem, W.V. Investigation to Local Defect Resonance for Non-Destructive Testing of Composites. Proceedings 2018, 2, 406.
Segers J, Kersemans M, Verboven E, Hedayatrasa S, Calderon J, Paepegem WV. Investigation to Local Defect Resonance for Non-Destructive Testing of Composites. Proceedings. 2018; 2(8):406.Chicago/Turabian Style
Segers, Joost; Kersemans, Mathias; Verboven, Erik; Hedayatrasa, Saeid; Calderon, Javier; Paepegem, Wim Van. 2018. "Investigation to Local Defect Resonance for Non-Destructive Testing of Composites." Proceedings 2, no. 8: 406.
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