Modeling of welding distortion in stiffened rings

Amiram Moshaiov*, Haoshi Song

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

3 Scopus citations


A simple model is developed to describe the deformation of a ring stiffener under welding, with applications to submarine hulls. The model is based on the realization that only a small part of the structure near the welding arc (near field) undergoes high temperature changes, and thus behaves thermo-elastic-plastically, while the rest of the structure (far field) is elastic in nature. The model is used to predict the overall axisymmetric residual shrinkage of different rings and the results are shown to be in excellent agreement with the finite-element method (FEM). This concept of near and far field could also be used to simplify three-dimensional FE models when predicting local, asymmetric welding distortions of various geometry.

Original languageEnglish
Pages (from-to)162-171
Number of pages10
JournalJournal of Ship Research
Issue number2
StatePublished - Jun 1991


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