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Polymer composite material characterisation using a laser/air-transducer system |
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| Authors: | WMD Wright DA Hutchins A Gachagan G Hayward |
| Institution: | a Department of Engineering, University of Warwick, Coventry CV4 7AL, UK b Department of Electrical and Electronic Engineering, University of Strathclyde, Glasgow G1 1XW, UK |
| 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. |
| Keywords: | Air-coupled transducer Non-contact ultrasound Fibre-reinforced composites C-scan imaging Lamb wave tomography |
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