A computer program for the elasto-plastic analysis of axially symmetrical shells of revolution has been modified to allow interaction loads at nozzle junctions to be distributed over bands of finite width, rather than the conventional concentrated lines of loading at the intersection of the shell centre-lines. Comparison with previously published test results for displacements, yield and collapse loads of flush nozzles shows that this modification greatly improves the predictions from those of conventional shell theory so that realistic behaviour of nozzle junctions can be forecast.
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