Modeling guided wave propagation with application to the long-range defect detection in railroad tracks
✍ Scribed by Ivan Bartoli; Francesco Lanza di Scalea; Mahmood Fateh; Erasmo Viola
- Publisher
- Elsevier Science
- Year
- 2005
- Tongue
- English
- Weight
- 604 KB
- Volume
- 38
- Category
- Article
- ISSN
- 0963-8695
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✦ Synopsis
The aim of this work is to demonstrate the use of a commercial finite element package, ABAQUS EXPLICIT, to model ultrasonic guided waves in structural components. The particular application of interest is modeling the interaction of a broadband vertical bending mode with transverse-type defects in railroad tracks. This topic is part of a broader project on high-speed defect detection in rails by long-range ultrasonic inspections. Reflection coefficient spectra in the 20-45 kHz range are obtained for four different sizes and three different orientations of transverse head flaws. A preliminary study of Lamb waves in a free plate helps drawing modeling guidelines for the rail.