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Proceedings Paper

Structural testing of fatigued structures
Author(s): Tobias Leutenegger; Dirk H. Schlums; Jurg Dual
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Paper Abstract

The structural responses of beams and tubes is investigated in theory and experiment in order to locate and assess damage in the form of fatigue cracks. Crack length measurements are performed in transversely vibrating beams by determining the resonant frequency, which is stabilized through a phase locked loop. Cracks are initiated and propagate from the notch of the structure which is vibrating at resonance. The frequency in relation to the crack length is modeled including the nonlinearity effect due to closing of the crack. Fatigue tests were also carried out with piezoelectrically excited microstructures.

Paper Details

Date Published: 9 June 1999
PDF: 11 pages
Proc. SPIE 3668, Smart Structures and Materials 1999: Smart Structures and Integrated Systems, (9 June 1999); doi: 10.1117/12.350775
Show Author Affiliations
Tobias Leutenegger, Swiss Federal Institute of Technology (Switzerland)
Dirk H. Schlums, Swiss Federal Institute of Technology (Switzerland)
Jurg Dual, Swiss Federal Institute of Technology (Switzerland)


Published in SPIE Proceedings Vol. 3668:
Smart Structures and Materials 1999: Smart Structures and Integrated Systems
Norman M. Wereley, Editor(s)

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