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Proceedings Paper

Modeling high-frequency wave propagation in rail tracks for crack detection
Author(s): Stefano Coccia; Ivan Bartoli; Francesco Lanza di Scalea; Mahmood Fateh; Gary Carr
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Paper Abstract

This paper gives insight to the ultrasonic wave propagation in arbitrary cross section waveguides such as a rail. Due to the geometrical complexity of the rail cross section, the analytical solution to the wave propagation in the rail is not feasible. A Semi Analytical Finite Element method is described as an alternative yet still robust approach to get the solution of the problem. The free-vibration solution (unforced) and the forced solution to a laser excitation, are shown for the case of an undamped rail up to a frequency of 500 kHz. The effects of different loading patterns are discussed, while experimental results are provided. A mode selection is performed, in accordance to the sensitivity of each mode to the different types of defect that can occur in a rail.

Paper Details

Date Published: 30 March 2009
PDF: 13 pages
Proc. SPIE 7292, Sensors and Smart Structures Technologies for Civil, Mechanical, and Aerospace Systems 2009, 72921W (30 March 2009); doi: 10.1117/12.815470
Show Author Affiliations
Stefano Coccia, Univ. of California, San Diego (United States)
Ivan Bartoli, Univ. of California, San Diego (United States)
Francesco Lanza di Scalea, Univ. of California, San Diego (United States)
Mahmood Fateh, Federal Railroad Administration (United States)
Gary Carr, Federal Railroad Administration (United States)


Published in SPIE Proceedings Vol. 7292:
Sensors and Smart Structures Technologies for Civil, Mechanical, and Aerospace Systems 2009
Masayoshi Tomizuka, Editor(s)

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