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Proceedings Paper

Applications of laser ultrasound NDT methods on composite structures in aerospace industry
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Paper Abstract

Composite materials are used more and more in aircraft production. Main composite types are Carbon Fiber Reinforced Plastics (CFRP), Glass Fiber Reinforced Plastics (GFRP) and metal-aluminium laminates (e. g. Glass Fiber Aluminium Reinforced GLARE©). Typical parts made of CFRP material are flaps, vertical and horizontal tail planes, center wing boxes, rear pressure bulkheads, ribs and stringers. These composite parts require adequate nondestructive testing (NDT) methods. Flaws to be detected are delaminations and debondings, porosity and foreign body inclusion. Manual ultrasonic testing with single element transducers is still the most applied method for composite parts with small and medium size. The extension of the conventional ultrasound technique for nondestructive testing with the laser ultrasound method brings new possibilities into the production processes for example the inspection of complex CFRP-components and the possibilities of online observation under remote control. In this paper we describe the principle of laser ultrasound with respect to the demands of nondestructive testing especially of small complex CFRP and C/PPS parts. We report applications of laser-based ultrasound options with generated types of guided and bulk waves on modern aircraft materials.

Paper Details

Date Published: 3 October 2008
PDF: 11 pages
Proc. SPIE 7155, Ninth International Symposium on Laser Metrology, 71550E (3 October 2008); doi: 10.1117/12.814512
Show Author Affiliations
Michael Kalms, Bremen Institute of Applied Beam Technology (Germany)
Oliver Focke, Bremen Institute of Applied Beam Technology (Germany)
Christoph v. Kopylow, Bremen Institute of Applied Beam Technology (Germany)

Published in SPIE Proceedings Vol. 7155:
Ninth International Symposium on Laser Metrology
Chenggen Quan; Anand Asundi, Editor(s)

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