Local buckling strength of ring stiffened cylindrical shells under external pressure |
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Authors: | A.J. Reis A.C. Walker |
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Affiliation: | Technical University of Lisbon, Inst. Sup. Tecnico - Department of Civil Engineering, Portugal Spain;University of Surrey, Department of Mechanical Engineering, Guildford, Surrey, England UK |
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Abstract: | The paper presents a non-linear buckling analysis of ring stiffened cylindrical shells subject to external pressure. The collapse pressure is calculated by assuming failure to occur when the material reaches a plastic stress state defined by the Ilyushin criterion. It is shown in the paper that use of the non-linear theory can reduce the estimated first yield by up to 25% in comparison to the linear buckling analysis used up to now. Comparison of predicted failure loads are in good agreement with the lower bound of test results. |
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