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Guided elastic waves and their impact interaction in CFRP structures characterized by 3D laser scanning vibrometry

 
: Schubert, L.; Barth, M.; Klesse, T.; Köhler, B.; Frankenstein, B.

:

Kundu, T. ; American Society of Mechanical Engineers -ASME-:
Health monitoring of structural and biological systems 2008 : 10 - 13 March 2008, San Diego, California, USA
Bellingham, WA: SPIE, 2008 (SPIE Proceedings 6935)
ISBN: 978-0-8194-7121-5
Paper 69350G
Conference on Health Monitoring of Structural and Biological Systems <2008, San Diego/Calif.>
English
Conference Paper
Fraunhofer IZFP, Institutsteil Dresden ( IKTS-MD) ()

Abstract
The paper presents guided elastic waves and their identification and damage interaction in a CFRP plate. After the excitation of a fiber transducer, different elastic waves emerge in a plate. By using specially developed 3D laser scanning software it was possible to specify the different wave modes. These wave modes have been described concerning their propagating velocities and different motion components. The interaction of different wave modes with introduced impact damage (7J) is shown. In some expts., it was proven that impact locations can be derived from the detected Lamb waves. This work is continued to develop structural health monitoring systems (SHM) for selected aircraft components (e. g. stringer elements, panels).

: http://publica.fraunhofer.de/documents/N-85823.html