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Terahertz FMCW inspection of GFRP composites: Comparison with conventional NDT techniques and enhanced defect detection capability through semi-automatic 3-D image processing

: Matheis, C.; Wohnsiedler, S.; Ospald, F.; Cristofani, E.; Brook, A.; Jonuscheit, J.; Beigang, R.; Vandewal, M.

Informationstechnische Gesellschaft -ITG-:
German Microwave Conference, GeMIC 2014 : 10-12 March 2014, Aachen, Germany
Berlin: VDE-Verlag, 2014 (ITG-Fachbericht 246)
ISBN: 978-3-8007-3585-3
German Microwave Conference (GeMiC) <8, 2014, Aachen>
Fraunhofer IPM ()
delamination; glass fibre reinforced plastics; nondestructive testing; terahertz wave imaging

A range of composite materials that contain glass fiber reinforced polymers is inspected for various defects such as debonds, delaminations and foreign inclusions with a terahertz FMCW imaging system. The results are evaluated manually and by means of semi-automatic image processing, which enhances the detection rate. Comparison with reference measurements from established NDT techniques shows high defect detectability with the terahertz approach.