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- W2074456433 abstract "Carbon fibre reinforced polymers (CFRP) have been used significantly more inrecent years due to their increased specific strength over aluminium structures. One major areain which their use has grown is the aerospace industry where many now use CFRP in theirconstruction. One major problem with CFRP’s is their low resistance to impacts. Structuralhealth monitoring (SHM) aims to continually monitor a structure throughout its entire life andcan allow aircraft owners to identify impact damage as it occurs. This means that it can berepaired prior to growth, saving weight with the repair and the time that aircraft is grounded.Two areas of SHM being researched are Acoustic Emission (AE) monitoring and AcoustoUltrasonics(AU) both based on an understanding of the propagation of ultrasonic waves. 3DScanning laser vibrometry was used to monitor the propagation of AU waves with the aim ofgaining a better understanding their interaction with delamination in carbon fibre reinforcedpolymers. Three frequencies were exited with a PZT transducer and the received signalanalysed by a cross correlation method. The results from this and the vibrometer scans revealed100 kHz as the most effective propagating frequency of the three. A high resolution scan wasthen conducted at this frequency where it could be seen that only the out of plane component ofthe wave interacted with the damage, in particular the A0 mode. A 3D Fast Fourier Transformwas then plotted, which identified the most effective frequency as 160 kHz." @default.
- W2074456433 created "2016-06-24" @default.
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- W2074456433 date "2015-07-09" @default.
- W2074456433 modified "2023-10-16" @default.
- W2074456433 title "Assessment of Damage Detection in Composite Structures Using 3D Vibrometry" @default.
- W2074456433 cites W1998665038 @default.
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- W2074456433 doi "https://doi.org/10.1088/1742-6596/628/1/012101" @default.
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