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Abstract
A simplified finite element method based on the deformation theory for structural limit analysis is applied to the estimation of the limit load of two widely used pressure vessel components. One is the nozzle-sphere intersection under internal pressure and radial load: the other is the torispherical pressure vessel head under internal pressure. The results are compared with existing solutions and the detailed elasto-plastic finite element analysis. It can be seen that this method gives remarkably accurate results for various configurations of the components analyzed. In the meantime, the effects of mesh density on the accuracy of the solution are also examined. The investigation shows that with quite coarse mesh this method can obtain adequately accurate results and further reduce the computation resource.
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