Defect Detection in Seven-Wire Steel Strands Using Single Magnetostrictive Transducer with Two-Layer Coil


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In order to achieve active health monitoring of seven-wire steel strands, single magnetostrictive transducer with two-layer coil is developed and applied for the excitation and reception of ultrasonic longitudinal guided waves simultaneously. The transducer can be conveniently fixed at any single one position on the helical surface of these structures. The inner and outer layers of its coil are used for excitation and reception respectively with the help of same axisymmetric permanent magnets. Experimental results show that chosen ultrasonic longitudinal guided wave mode, L(0,1) at 140kHz, can be excited and received with high signal-to-noise ratio in steel strands by using the developed magnetostrictive transducer. Furthermore, to identify the performance of the transducer, the detection of an artificial defect is also conducted.



Edited by:

Shengyi Li, Yingchun Liu, Rongbo Zhu, Hongguang Li, Wensi Ding




Z. H. Liu et al., "Defect Detection in Seven-Wire Steel Strands Using Single Magnetostrictive Transducer with Two-Layer Coil", Applied Mechanics and Materials, Vols. 34-35, pp. 456-461, 2010

Online since:

October 2010




[1] J. L. Rose. Standing on the shoulders of giants: an example of guided wave inspection. Material Evaluation. 2002, 60(1): 53-59.

[2] H. Kwun, K. A. Bartels, J. J. Hanley. Effects of tensile loading on the properties of elastic-wave in a strand. Journal of Acoustical Society of America. 1998, 103(6): 3370-3375.


[3] H. Kwun, K. A. Bartels. Magnetostrictive sensor technology and its applications. Ultrasonics. 1998, 36(1): 171-178.


[4] G. Washer, R. Green, R. Pond. Velocity constants for ultrasonic stress measurement in prestressing tendons. Research in Nondestructive Evaluation. 2002, 14(2): 81-94.


[5] Hung-Liang Chen, K. Wissawapaisal. Application of Wigner-Ville transform to evaluate tensile forces in seven-wire prestressing strands. Journal of Engineering Mechanics. 2002, 128(11): 1206-1214.


[6] Hung-Liang Chen, K. Wissawapaisal. Measurement of tensile forces in a seven-wire prestressing strand using stress waves. Journal of Engineering Mechanics. 2001, 127(6): 599-606.


[7] P. Rizzo. Ultrasonic Wave Propagation in progressively loaded multi-wire strands. Experimental Mechanics. 2006, 46(3): 297-306.


[8] P. Rizzo, F. L. di Scalea. Ultrasonic inspection of multi-wire steel strands with the aid of the wavelet transform. Smart Materials and Structures. 2005, 14(4): 685-695.


[9] J. L. Rose. Ultrasonic waves in solid media United Kingdom, Cambridge: Cambridge university press (1999).

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