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Publications
Tekgoz, M., Garbatov, Y. and Guedes Soares, C. (2015), “Strength assessment of a stiffened panel based on the modified stress curve approach”, Maritime Technology and Engineering, Guedes Soares, C. & Santos T.A. (Eds.), Taylor & Francis Group, London, UK, pp. 503-512
The objective of this work is to analyse the effect of the welding induced residual stresses on the ultimate strength of a stiffened panel by applying the modified stress-strain curve approach. Firstly, a thermal and mechanical nonlinear finite element analysis, based on the moving heat source, is performed to estimate the residual welding induced stresses and distortions. Secondly, a structural nonlinear finite element analysis is carried out to estimate the stress-strain behaviour of stiffened panel and a modified material stress-strain curve is developed to account for the residual welding induced stresses. Thirdly, it is demonstrated how the new developed modified material stress-strain curve can be incorporated into the methodology, stipulated by the Common Structural Rules for analysing the ultimate strength of one bay stiffened panel. The ultimate strength of stiffened panel estimated based on the finite element analyses using the modified stress-strain curve, current Common Structural Rules and the one with the implemented correction for the residual stresses are compared and discussed.
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