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http://dx.doi.org/10.3795/KSME-A.2011.35.6.635

Effect of Groove Shape on Residual Stress Distribution in Narrow Gap Welds  

Soh, Na-Hyun (School of Mechanical Design and Automation Engineering, Seoul National Univ. of Science and Technology)
Yang, Jun-Seok (KEPCO Research Institute)
Pyo, Chang-Ryul (Dept. of Mechanical and Automotive Engineering, Induk Univ.)
Huh, Nam-Su (School of Mechanical Design and Automation Engineering, Seoul National Univ. of Science and Technology)
Publication Information
Transactions of the Korean Society of Mechanical Engineers A / v.35, no.6, 2011 , pp. 635-642 More about this Journal
Abstract
It is well known that conventional welding techniques can result in welding defects due to the large groove angle of the weld. In this context, the narrow gap welding (NGW) technique is applied in the nuclear industry because of its inherent merits such as the reduction in welding time and the shrinkage of the weld, and the small deformation of the weld resulting from the small groove angle and welding bead width. In this paper, the distribution of welding residual stress and deformation behavior of the ER308L weld due to NGW are predicted through nonlinear two-dimensional finite element analysis, in which the actual NGW process is simulated in detail. In particular, the effects of the shape of weld, i.e., the width of the weld and the shape of the welding groove, on the residual stress are investigated. The present results can be used to assess the integrity of defective nuclear components and to improve the welding process.
Keywords
Finite Element Analysis; Narrow Gap Weld; PWSCC; Welding Residual Stress;
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Times Cited By KSCI : 1  (Citation Analysis)
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1 Song, T. K., Bae, H. Y., Kim, Y. J., Lee, K. S., Park, C. Y., Yang, J. S., Huh, N. S., Kim, J. W., Park, J. S., Song, M. S., Lee, S. G., Kim, J. S., Yu, S. C. and Chang, Y. S.,, 2009, "Assessment of Round Robin Analyses Results on Welding Residual Stress Prediction in a Nuclear Power Plant Nozzle," Trans. of the KSME A, Vol. 33, No. 1 pp. 72-81.   과학기술학회마을   DOI   ScienceOn
2 ASME, 2004, "Welding and Brazing Qualification," ASME Boiler and Pressure Vessel Code, Sec. IX
3 "Materials Reliability Program: Advanced FEA Evaluation of Growth of Postulated Circumferential PWSCC Flaws in Pressurizer Nozzle Dissimilar Metal Welds (MRP-216, Rev. 1): Evaluations Specific to Nine Subject Plants," EPRI, Palo Alto, CA, U.S.A., 2007.
4 Brickstad, B. and Josefson, B. L., 1998, "A Parametric Study of Residual Stresses in Multi-Pass Butt-Welded Stainless Steel Pipes," International Journal of Pressure Vessels and Piping, Vol. 75, pp. 11-25.   DOI   ScienceOn
5 Brust, F. W. and Scott, P. M., 2007, "Weld Residual Stresses and Primary Water Stress Corrosion Cracking in Bimetal Nuclear Pipe Welds," Trans. of ASME PVP Conference, PVP2007-26297.
6 "ABAQUS/Standard User's Manual," ABAQUS Version 6.9-1, Simulia Corp.,