Imaging and Testing of Ultrasonic Sh Guided Waves in Plate with Lap Welding Structure

Abstract:

The imaging and testing of ultrasonic SH (Shear Horizontal) guided waves may be used into testing and SHM (Structure Health Monitoring) of industrial plate with welding structure in service, which have much more important applied potential. During imaging and testing for steel plate with lap welding structure, photoelastic experiment on propagation of guided waves in Plexiglas plate was studied to clearly see the excellent advantages of SH guided waves. The mode of SH guided waves was analyzed to select the zero order mode SH0 and the SH guided waves transducer with SH0 mode was developed. Based on the synthetic aperture focusing method，a multichannel ultrasonic imaging and testing experimental system of ultrasonic SH guided waves was constructed，the imaging of plate with lap welding structure was mainly studied. The research results shows the ultrasonic SH guided waves and the transducers are fit for long distance testing for the plate with lap welding structure. The ultrasound scattering nearby the weld may cause a blind testing zone, about 150 mm wide, in which the less size corrosion defects at the blind zone could not be revealed in image, so as to lead to defects “no testing”. The imaging and testing of ultrasonic SH guided waves would be used for non-destructive testing of plate with lap welding structure, which image both can characterize the corrosion defects and lap welding structure, and realize the precise location of the weld. The proposed research provides important foundation for improving ultrasonic guided waves imaging and testing quality and SHM of industrial in-site plate with lap welding and larger size.

• Periodical: Advanced Materials Research (Volumes 301-303)
• Pages: 603-609
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.301-303.603
• Online since: July 2011
• Authors: Xin Jie Zhu, Zan Dong Han, Dong Du, Yi Fang Chen, Ke Yi Yuan
• Keywords: Imaging, Lap Welding Structure, Testing, Ultrasonic SH Guided Waves

References

[1] Linping Gao：Petrochemical Corrosion and Protection Vol. 17(2000), p.50.

[2] Liu Guangwen, Chen Cichang: Oil &Gas Storage and TransportationVol. 28 (2009), p.1.

[3] B.W. Drinkwater and P.D. Wilcox: NDT & E International Vol. 39 (2006) ，p.525.

[4] Zhongxing Zheng: Wu Sun Tan Shang Vol. 30(2006)，p.7.

[5] M. Ratassepp, M. J. S. Loweb , P. Cawley, and et al: J. Acoust. Soc. Am. Vol. 124 (2008), p.2873.

[6] P. Rajagopal, M.J.S. Lowe:J. Acoust. Soc. Am. Vol. 124(2008), p.2895.

[7] A. Velichko, P.D. Wilcox: J. Acoust. Soc. Am. Vol. 123(2008), p.186.

[8] J.E. Michaels, J.S. Hall and T.E. Michaels: Proc. of SPIE, Vol. 729515 (2009), p.1.