Skip to Main content Skip to Navigation
Journal articles

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.
Complete list of metadatas

Cited literature [19 references]  Display  Hide  Download

https://hal.archives-ouvertes.fr/hal-00942971
Contributor : Bernadette Bergeret <>
Submitted on : Friday, February 21, 2014 - 3:26:49 PM
Last modification on : Monday, October 28, 2019 - 5:46:14 PM

File

OspaldOE2014_53_3_031208-HAL.p...
Publisher files allowed on an open archive

Licence


Distributed under a Creative Commons Attribution - NonCommercial 4.0 International License

Identifiers

Collections

Citation

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, SPIE, 2014, 53 (3), pp.031208 (1-14). ⟨10.1117/1.OE.53.3.031208⟩. ⟨hal-00942971⟩

Share

Metrics

Record views

1076

Files downloads

2439