Characterization of Surface Crack Using Surface Waves

Abstract:

Surface cracks are the most common defects in structures. Ultrasonic has been widely used as a non-destructive evaluation technology in the case of crack characterization. In this investigation, surface waves are applied to a steel block with artificial slots to characterize the crack depth. A series of test specimen with different depths of surface crack ranging from 4mm to 10mm was fabricated. The depth of the surface crack was evaluated using the pitch-catch ultrasonic technology. In this work, 2.25 MHz, 5 MHz and 10 MHz of incident waves were employed to investigate the effect of frequency on the crack depth detection. Experimental test results show that the accuracy of crack depth detection is increasing with the increase of frequency.

• Periodical: Applied Mechanics and Materials (Volumes 166-169)
• Pages: 1931-1934
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.166-169.1931
• Online since: May 2012
• Authors: Shiuh Chuan Her, Sheng Tung Lin
• Keywords: Non-Destructive Evaluation, Surface Crack, Surface Wave, Ultrasonic

References

[1] Y. Sohn and S. Krishnaswamy: J Acoust. Soc. Am. Vol. 115 (2004), p.172

[2] C. Ni, Y. Shi, Z. Shen, J. Lu and X. Ni: NDT&E International Vol. 43 (2010), p.470

[3] B. Dutton, A.R. Clough, M.H. Rosli and R.S. Edwards: NDT&E International Vol. 44 (2011), p.353

[4] D.G. Aggelis, T. Shiotani and D. Polyzos: Cement & Concrete Composites Vol. 31 (2009), p.77

[5] D.A. Cook and Y.H. Berthelot: NDT & E International Vol. 34 (2001), p.483

[6] Y. Fan, S. Dixon, R.S. Edwards and X. Jian: NDT&E International Vol. 40 (2007), p.471

[7] B. Masserey, L. Aebi and E. Mazza: Ultrasonics Vol. 44 (2006), p. e957

[8] S.C. Her and S. T. Lin: Applied Mechanics and Materials Vols. 52-54 (2011), p.865

[9] X. Jian, S. Dixon, N. Guo, R.S. Edwards and M. Potter: Ultrasonics Vol. 44 (2006), p. e1131

[10] J. K. Na and J. L. Blackshire: NDT & E International Vol. 43 (2010), p.432