30 March 2009 Modeling high-frequency wave propagation in rail tracks for crack detection
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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.
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Stefano Coccia, Stefano Coccia, Ivan Bartoli, Ivan Bartoli, Francesco Lanza di Scalea, Francesco Lanza di Scalea, Mahmood Fateh, Mahmood Fateh, Gary Carr, Gary Carr, } "Modeling high-frequency wave propagation in rail tracks for crack detection", Proc. SPIE 7292, Sensors and Smart Structures Technologies for Civil, Mechanical, and Aerospace Systems 2009, 72921W (30 March 2009); doi: 10.1117/12.815470; https://doi.org/10.1117/12.815470

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