Abstract
The photoacoustic piezoelectric (PAPE) technique is an effective non-destructive testing technique for detecting defects in materials. In this paper, Chinese national standard railway cracks have been detected by thermal wave imaging based on the PAPE technique. First, the theory of the PAPE technique has been introduced and the corresponding imaging principle has been analyzed. Second, the corresponding experimental system has been setup, and the imaging tests have been carried out. Third, two kinds of standard cracks have been examined by the imaging system. The results show that thermal wave imaging based on the PAPE technique can effectively image and identify the cracks at different depths, which lays a foundation for practical application to the detection of rail cracks.
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Yan, L., Gao, C., Zhao, B. et al. Non-destructive Imaging of Standard Cracks of Railway by Photoacoustic Piezoelectric Technology. Int J Thermophys 33, 2001–2005 (2012). https://doi.org/10.1007/s10765-012-1253-6
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DOI: https://doi.org/10.1007/s10765-012-1253-6