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Publications
Gaspar, B., Garbatov, Y. and Guedes Soares, C. (2009), “Effect of uncertain weld shape on the structural hot-spot stress distribution”, Analysis and Design of Marine Structures, Guedes Soares, C. and Das, P. K. (Eds.), Taylor & Francis Group, London, U.K., pp. 267-278
This paper presents a probabilistic study of the effect of uncertain weld shape on the structural hot-spot stress distribution along the weld toe using a Monte-Carlo simulation and the finite element analysis. A structural detail consisting of a plate strip with a transversal butt welded joint and a tapered thickness step is used as case study. The weld shape is modelled based on weld profile parameters defined as random variables allowing the simulation of typical imperfections as a function of the quality level of welding. The analysis uses a linear finite element model build with second order solid finite elements. A finite element analysis program is used to calculate the stress distribution on the vicinity of the weld toe and a standard extrapolation procedure is used to obtain the structural hot-spot stresses. Different quality levels are used to generate the weld shapes and its effect on the hot-spot stresses is calculated afterwards.
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