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

Michael Kalms; Oliver Focke; Christoph v. Kopylow

doi:10.1117/12.814512

3 October 2008 Applications of laser ultrasound NDT methods on composite structures in aerospace industry

Michael Kalms, Oliver Focke, Christoph v. Kopylow

Proceedings Volume 7155, Ninth International Symposium on Laser Metrology; 71550E (2008) https://doi.org/10.1117/12.814512
Event: Ninth International Symposium on Laser Metrology, 2008, Singapore, Singapore

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.

Citation Download Citation

Michael Kalms, Oliver Focke, and Christoph v. Kopylow "Applications of laser ultrasound NDT methods on composite structures in aerospace industry", Proc. SPIE 7155, Ninth International Symposium on Laser Metrology, 71550E (3 October 2008); https://doi.org/10.1117/12.814512

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