Ultrasonic Testing of Rails Including Vertical Cracks - Numerical Modeling and Experimental Results
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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
One of the possible reasons for the failure of rails in railway tracks is the appearance of vertical cracks in the head, neck or bottom of the rail (see Fig. 1). Therefore, it is necessary to detect such defects at an early stage when the cracks are still of smaller dimensions. For vertical cracks, results of ultrasonic pulse-echo measurements are difficult to interpret due to mode conversions at the crack and rail surfaces, respectively. For normal incidence, not only the attenuation of the primary wavefront but also new echoes due to converted wave modes can be observed in the A-scan data.