An Estimation Formula of the Stress Concentration Factor of the Butt-Welded Joint


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The purpose of this paper is to develop an estimation formula of stress concentration factors of butt-welded components under tensile loading. To investigate the influence of weld bead profiles on stress concentration factors of double V groove butt-welded joints, butt-welded specimens were made by CO2 gas metal arc welding. And the three main parameters, the toe radius, flank angle and bead height were measured by a profile measuring equipment. By using the measured data, the influence of three parameters on the stress concentration factors was investigated by a finite element analysis. It is shown that the three parameters have similar effects on the stress concentration factors. According to the simulation results, a formula to estimate the stress concentration factors of butt-weld welded structures was proposed and the estimated concentration factors from the formula were compared with the results obtained by the finite element analysis. The two results are in a good agreement.



Key Engineering Materials (Volumes 353-358)

Edited by:

Yu Zhou, Shan-Tung Tu and Xishan Xie




B. C. Goo, "An Estimation Formula of the Stress Concentration Factor of the Butt-Welded Joint", Key Engineering Materials, Vols. 353-358, pp. 1995-1998, 2007

Online since:

September 2007





[1] B.C. Goo, J.H. Kim, J.W. Seo and C.S. Seok: Key Engineering Materials Vol. 270-273 (2004), p.2302.

[2] S. Yoshida, M. Inagaki, M. Kanao, E. Sasaki, M. Nihei and M. Kamakura: Transactions of Japanese Welding Society Vol. 47, No. 9 (1978), p.627 (in Japanese).