Fatigue Crack Characterization in Conducting Sheets by Non Contact Stimulation of Resonant Modes
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Begun in 1973, the Review of Progress in Quantitative Nondestructive Evaluation (QNDE) is the premier international NDE meeting designed to provide an interface between research and early engineering through the presentation of current ideas and results focused on facilitating a rapid transfer to engineering development.
This site provides free, public access to papers presented at the annual QNDE conference between 1983 and 1999, and abstracts for papers presented at the conference since 2001.
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Abstract
The natural frequencies and modes of vibration of a linearly elastic continuum are a function of the mass and stiffness of the body [1]. As many structural flaws, such as fatigue cracks, corrosion, and disbonds, will affect these attributes, vibrational analysis is a natural method by which to characterize such flaws. Finite element modeling techniques can be used to predict vibrational responses from various structure/defect combinations, so that test parameters can be selectively chosen for the requirements of the investigation. Critical areas can be isolated through the application of appropriate boundary conditions, and test frequencies chosen so as to excite desired eigen-modes.