Effect of Vibration during Welding on the Fatigue Strength of Structural Steel Weldments

Abstract:

During repair welding of steel bridge under service load, vibration occurs due to the dynamic loads like wind and vehicles, etc. However, the effect of vibration during welding on the fatigue strength of weldments is not yet clearly understood. In this paper, the effect of vibration during welding on the fatigue strength of structural steel weldments was investigated in order to improve reliability in the repair welded joints of steel bridge. The base material used in this investigation was SM 490A steel of weldable grade. Flux Cored Arc Welding (FCAW) process was used to fabricate the single ‘V’ butt joints. Welding was performed on the steel under the mechanical vibration of given frequency. The applied frequency was resonant frequency. Also, weldments under no vibration during welding were prepared. Fatigue tests were conducted using a servo hydraulic controlled 50tonf capacity UTM with a frequency of 5Hz under constant amplitude loading. Effect of vibration during welding on the fatigue strength of weldments was analyzed in detail.

• Periodical: Solid State Phenomena (Volumes 124-126)
• Pages: 1329-1332
• DOI: https://doi.org/10.4028/www.scientific.net/SSP.124-126.1329
• Online since: June 2007
• Authors: Chin Hyung Lee, Gab Chul Jang, Hyun Chan Park, Kyong Ho Chang
• Keywords: Fatigue Strength, Repair Welding, Vibration, Weld Joint

References

[1] W. Wu: Mater. Trans. Vol. 40, No. 2 (1999), p.1456.

[2] W. Wu: Scripta Mater. Vol. 42 (2000), p.661.

[3] W. Wu and C. H. Tsai: Metall. Mater. Trans. Vol. 30A (1999), p.417.

[4] T .D. Park, H. G. Kim and J. G. Youn: Proc. IWC-KOREA 2002, p.408.

[5] S. Aoki, T. Nishimura and T. Hiroi: Nucl. Eng. Des. Vol. 235 (2005), p.1441.

[6] ASTM: Annual Book of ASTM Standards, Vol. 03. 01, E 466-96 (2005).

[7] S. Ravi, V. Balasubramanian, S. Nemat Nasser: Eng. Fail. Anal. Vol. 11, No. 3 (2004), p.413.

[8] G. Cheng, Z. B. Kuang, Z. W. Lou and H. Li: Int. J. Pres. Ves. & Piping Vol. 67 (1996), p.229.

[9] P. Johan Singh, B. Guha, D. R. G. Achar: Eng. Fail. Anal. Vol. 10 (2003), p.383.

[10] M. Sakano and M. A. Wahab: Int. J. Pres. Ves. & Piping Vol. 75 (1998), p.1037.

[11] C. Miki, F. Nishino, Y. Hirabayashi and H. Ohga: Porc. of JSCE. Vol. 325 (1982), p.155.