Field of research: Fabrication Effects on Structural Behaviour; Load Carrying Behaviour
Duration: 01.03.2001 – 28.02.2004
Project leader: Prof. Dr.-Ing. W. Fricke
Funded by: DFG
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Abstract
A direct approach, which can be used during the design process, to account for the effect of welding residual stress and deformation due to multi-pass welding on the buckling strength of HY-80 spherical shell under hydrostatic loading is presented in this study. It is based on a direct numerical calculation of the residual stress and deformation during the welding process, including metallurgical phase change, which are taken as initial condition for a nonlinear buckling analysis. It is shown, that the effect of welding residual stress and deformation on the buckling strength is rather small for the R/t-ratio considered (R/t = 100).
Final Report
L. Grünitz: Buckling Strength of Welded HY-80 Spherical Shells: A Direct Approach. Diss. an der TU Hamburg-Harburg, Juni 2004.
Further Publications:
L. Grünitz: Evaluation of the Welding Residual Stress State in a Thick HY-80 Steel Plate. Proc. of 13th ISOPE Conf., Honolulu 2003
W. Fricke, K. Grünitz und S. Franitza: Direkte Berechnung von Schweißeigenspannungen in mehrlagigen HY-80-Stumpfstößen und deren Auswirkung auf das Beulverhalten von Kugel-schalen. Schweißen und Schneiden 57 (2005), Nr. 1/2, S. 18-24.