Terahertz FMCW Inspection of GFRP Composites: Comparison with Conventional NDT Techniques and Enhanced Defect Detection Capability through Semi-automatic 3-D Image Processing

Terahertz FMCW Inspection of GFRP Composites: Comparison with Conventional NDT Techniques and Enhanced Defect Detection Capability through Semi-automatic 3-D Image Processing ■

Fabian Friederich, Fabian Friederich, Fabian Friederich, C. Matheis, C. Matheis, C. Matheis, J. Jonuscheit, J. Jonuscheit, J. Jonuscheit, R. Beigang, R. Beigang, R. Beigang, Edison Cristofani, Edison Cristofani, Edison Cristofani, M. Vandewal, 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.