Letterbox Type Repair Weld Finite Element Simulation and Residual Stress Prediction


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Finite element prediction of residual stresses in a 3-bead letterbox-type repair weld is investigated in the present study. The repair is performed on a 2¼CrMo low alloy ferritic steel plate, containing a machined central groove where three weld beads are deposited using AL CROMO S 225 2¼CrMo electrodes. The proposed simulation procedure, which is based on decoupled thermal and mechanical analyses and the “birth and death of elements” technique, is evaluated through comparison of predicted stresses with neutron diffraction testing data. Parametric studies include modelling aspects such as 2-D plane strain versus 3-D analysis, re-melting of weld material during sequential bead deposition, melting of base plate near the fusion line and annealing. It is concluded that numerical results come, in general, in satisfied agreement with the experimental data.



Materials Science Forum (Volumes 524-525)

Edited by:

W. Reimers and S. Quander




L.K. Keppas et al., "Letterbox Type Repair Weld Finite Element Simulation and Residual Stress Prediction", Materials Science Forum, Vols. 524-525, pp. 445-450, 2006

Online since:

September 2006




[1] Dong P, Zhang J, Bouchard PJ, Effects of repair weld length on residual stress distribution, Trans ASME J Press Vessel Technology 124, 1, 74-80, (2002).

DOI: https://doi.org/10.1115/1.1429230

[2] Ohms C., Katsareas D.E., Wimpory R.C., Hornak P., & Youtsos A. G, Residual stress analysis in a thick dissimilar metal based on neutron diffraction, Proceedings of the 2004 ASME/ JSME Pressure Vessels and Piping Conference, PVP-Vol. 479, ISBN-0-7918-4674-1, pp.85-92, San Diego (California), July 25-29 (2004).

DOI: https://doi.org/10.1115/pvp2004-2651

[3] Bouchard P.J., George D., Santisteban J. R, Bruno G., Dutta M., Edwards L., Kingston E., Smith D.J. Measurement of residual stresses in a stainless steel pipe girth weld containing long and short repairs, Int J. Pressure Vessels Piping 82, 4, 299-310, (2005).

DOI: https://doi.org/10.1016/j.ijpvp.2004.08.008

[4] Katsareas D.E., & Youtsos A.G., Recent advances in IE-JRC on finite element prediction of residual stresses in welds, Proceedings of the 6 th International Conference for Mesomechanics, G.C. Sih, T.B. Kermanidis & S.G. Pantelakis (Eds), ISBN-960-88104-0-X, pp.358-370, Patras (Greece), May 31 (2004).

[5] Lindgren L.E., Finite element modeling and simulation of welding. Part I: increased complexity, J. Therm. Stress 24 141-192, (2001).

[6] NET - TG2 Auxiliary Round Robin 3-Bead Repair Weld Finite Element Simulation Protocol - V1, (2005).

[7] R.C. Wimpory, Hahn-Meitner-Institut, FRM-II, NET 8th steering committee meeting, 22-24 November 2005, Petten, the Netherlands.