Aeronautics composite material inspection with a terahertz time-domain spectroscopy system - Archive ouverte HAL Access content directly
Journal Articles Optical Engineering Year : 2014

Aeronautics composite material inspection with a terahertz time-domain spectroscopy system

Abstract

The usability of pulsed broadband terahertz radiation for the inspection of composite materials from the aeronautics industry is investigated, with the goal of developing a mobile time-domain spectroscopy system that operates in reflection geometry. A wide range of samples based on glass and carbon fiber reinforced plastics with various types of defects is examined using an imaging system; the results are evaluated both in time and frequency domain. The conductivity of carbon fibers prevents penetration of the respective samples but also allows analysis of coatings from the reflected THz pulses. Glass fiber composites are, in principle, transparent for THz radiation, but commonly with significant absorption for wavelengths >1 THz. Depending on depth, matrix material, and size, defects like foreign material inserts, delaminations, or moisture contamination can be visualized. If a defect is not too deep in the sample, its location can be correctly identified from the delay between partial reflections at the surface and the defect itself.
Fichier principal
Vignette du fichier
OspaldOE2014_53_3_031208-HAL.pdf (8.81 Mo) Télécharger le fichier
Origin : Publisher files allowed on an open archive
Loading...

Dates and versions

hal-00942971 , version 1 (21-02-2014)

Licence

Attribution - NonCommercial

Identifiers

Cite

Franck Ospald, Wissem Zouathi, René Beigang, Carsten Matheis, Joachim Jonuscheit, et al.. Aeronautics composite material inspection with a terahertz time-domain spectroscopy system. Optical Engineering, 2014, 53 (3), pp.031208 (1-14). ⟨10.1117/1.OE.53.3.031208⟩. ⟨hal-00942971⟩

Collections

CNRS LOMA
589 View
1355 Download

Altmetric

Share

Gmail Facebook X LinkedIn More