Impact damages detection on composite materials by THz imaging

Fabien Destic (1) , Christophe Bouvet (2)

1 DEOS - Département Electronique, Optronique et Signal
2 ICA - Institut Clément Ader

This paper presents a Non-Destructive Testing (NDT) method based on the penetration properties of terahertz (THz) waves. A CW raster-scanning THz imaging setup, using a 3.8 THz Quantum Cascade Laser as a source, is used to perform NDT of polypropylene/polypropylene composite samples. Results from transmission and reflection THz imaging are compared to ultrasound C-scan. THz images in reflection give similar results to C-scan whereas THz transmission images provide more information about delaminations and cracks in the fiber fabrics.

Mots clés: Composite materials; Impact; Imaging; Laser; C-scan

Domaines: Traitement du signal et de l'image [eess.SP]

Fabien Destic, Christophe Bouvet. Impact damages detection on composite materials by THz imaging. Case Studies in Nondestructive Testing and Evaluation, 2016, 6, pp.53-62. ⟨10.1016/j.csndt.2016.09.003⟩. ⟨hal-01828758⟩