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On the detectability of fatigue crack growth at fastener holes using guided waves

Fromme, P; Masserey, B; Sayir, MB; (2003) On the detectability of fatigue crack growth at fastener holes using guided waves. In: Thompson, DO and Chimenti, DE, (eds.) REVIEW OF PROGRESS IN QUANTITATIVE NONDESTRUCTIVE EVALUATION, VOLS 22A AND 22B. (pp. 189 - 196). AMER INST PHYSICS

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Abstract

The nondestructive detection of fatigue cracks at fastener holes in aircraft structures employing guided waves is studied. Experimentally the first antisymmetric Lamb wave mode A(0) is excited using piezoelectric transducers and the scattered field is measured by means of a heterodyne laser interferometer. The detectability of small defects is investigated and quantified by a parameter study at a model system and using finite difference calculations. The main influence is found to be the ratio of wavelength and defect size. Measurements employing shorter wavelength Rayleigh waves show the predicted good detectability of a small quarter-elliptical fatigue crack.

Type: Proceedings paper
Title: On the detectability of fatigue crack growth at fastener holes using guided waves
Event: 29th Annual Review of Progress in Quantitative Nondestructive Evaluation
Location: WESTERN WASHINGTON UNIV, BELLINGHAM, WA
Dates: 2002-07-14 - 2002-07-19
ISBN: 0-7354-0117-9
Keywords: LAMB WAVE
UCL classification: UCL > Provost and Vice Provost Offices
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Mechanical Engineering
URI: http://discovery.ucl.ac.uk/id/eprint/60001
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