Polymer composite material characterisation using a laser/air-transducer system

Wright, WMD and Hutchins, D.A. and Gachagan, Anthony and Hayward, Gordon (1996) Polymer composite material characterisation using a laser/air-transducer system. Ultrasonics, 34 (8). pp. 825-833. ISSN 0041-624X

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Abstract

A wide bandwidth 1-3 connectivity piezocomposite air transducer has been used to detect laser-generated ultrasound in a variety of composite materials. Through thickness waveforms in various carbon fibre reinforced polymer (CFRP) composite plates will be presented, as well as a selection of Lamb waves. Signals were also obtained in samples of pultruded glass fibre reinforced composite of different thickness. Using the laser/air-transducer system, images were obtained of machined defects and delaminations by conventional C-scanning methods, and tomographic reconstruction techniques.