- Conference date: 15–20 July 2012
- Location: Denver, Colorado, USA
The scattering of ultrasound energy from localized damage sites has been studied extensively by numerous researchers and is of significant interest for quantitative NDE. Damage detection and basic sizing information have, for example, been provided using scattered energy reflection and transmission levels, time-of-flight signal analysis, crack-tip diffraction, and many other methods. In the present effort, finite element models and experimental measurements are used to understand edge diffraction effects, which can impact both the detection and accurate sizing of damage features. The results suggest that edge diffraction can generate localized energy fields in the forward and backscatter directions, causing signal content to vary. A simple analytic explanation of the observed effects is provided along with potential implications for damage characterization - both positive and negative.
- Energy content
- Finite element methods
- Nondestructive testing
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