Title :
Nondestructive evaluation of aircraft composites using terahertz time domain spectroscopy
Author :
Stoik, Christopher D. ; Bohn, Matthew J. ; Blackshire, James L.
Author_Institution :
Air Force Inst. of Technol., Wright-Patterson AFB, OH
Abstract :
Terahertz time domain spectroscopy was used for nondestructive evaluation of aircraft glass fiber composites stressed with bending and heating damage. Refractive index and absorption coefficients were measured for both damaged and undamaged composites. The two dimensional extent of the heat damage could be shown with either a simple phase or amplitude terahertz imaging technique.
Keywords :
absorption coefficients; aerospace materials; aircraft; bending; composite materials; glass fibres; heating; nondestructive testing; refractive index; submillimetre wave imaging; terahertz spectroscopy; absorption coefficient; aircraft glass fiber composites; amplitude terahertz imaging technique; bending; heating; nondestructive evaluation; refractive index; terahertz time domain spectroscopy; Absorption; Aircraft manufacture; Coatings; Composite materials; Etching; Frequency; Glass; Military aircraft; Optical refraction; Spectroscopy;
Conference_Titel :
Infrared, Millimeter and Terahertz Waves, 2008. IRMMW-THz 2008. 33rd International Conference on
Conference_Location :
Pasadena, CA
Print_ISBN :
978-1-4244-2119-0
Electronic_ISBN :
978-1-4244-2120-6
DOI :
10.1109/ICIMW.2008.4665841
