Structural testing of fatigued structures

Tobias Leutenegger; Dirk H. Schlums; Jurg Dual

doi:10.1117/12.350775

9 June 1999 Structural testing of fatigued structures

Tobias Leutenegger, Dirk H. Schlums, Jurg Dual

Proceedings Volume 3668, Smart Structures and Materials 1999: Smart Structures and Integrated Systems; (1999) https://doi.org/10.1117/12.350775
Event: 1999 Symposium on Smart Structures and Materials, 1999, Newport Beach, CA, United States

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.

Citation Download Citation

Tobias Leutenegger, Dirk H. Schlums, and Jurg Dual "Structural testing of fatigued structures", Proc. SPIE 3668, Smart Structures and Materials 1999: Smart Structures and Integrated Systems, (9 June 1999); https://doi.org/10.1117/12.350775

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