Terahertz FMCW Inspection of GFRP Composites: Comparison with Conventional NDT Techniques and Enhanced Defect Detection Capability through

Terahertz FMCW Inspection of GFRP Composites: Comparison with Conventional NDT Techniques and Enhanced Defect Detection Capability through ■

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

Abstract ■

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.