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- W768784933 abstract "Industry professionals have suggested that the current design standards for the reinforcement of pressure vessel openings under external pressure are too conservative. This thesis investigates current Australian and European design standards in contrast with a finite element analysis to quantify the suggested conservatism.The current Australian standard for pressure vessels under external pressure, clause 3.18.7.3, prescribes an additional area of reinforcement in proportion to the area of shell removed from the vessel body. This is known as the area replacement rule. The current equivalent European standard prescribes an additional area of reinforcement based on the cross sectional pressure area of the material removed from the shell.Comparisons based on the maximum permissible design pressure between the Australian standards and the European standards have been performed in this study. The results showed that the Australian standard AS12010 gives lower values of permissible design pressure. This suggested some conservatism within the Australian design standards for pressure vessels under external pressure.Clause 3.9.3 of AS1210 contains the von Mises calculation to size shells under external pressure. Finite element has been used to compare plain shells with various diameter to length ratios to establish if FEA will calculate buckling pressures higher than those calculated by the von Mises calculation. Results from this analysis showed that Clause 3.9.3 of AS1210 gave consistently smaller buckling pressures which suggested some conservatism in either the von Mises calculation or the safety factor prescribed in the standard.A pressure vessel model with a reinforced single opening under external pressure was designed in accordance with AS1210. A finite element analysis was performed on the model using solid-shell elements and the results of which were compared to the buckling pressure of a plain shell under external pressure. The results suggested that the amount of reinforcement in the pressure vessel restored more stability than necessary, although the model was not successfully validated." @default.
- W768784933 created "2016-06-24" @default.
- W768784933 creator A5080338002 @default.
- W768784933 date "2012-01-01" @default.
- W768784933 modified "2023-09-27" @default.
- W768784933 title "Review of the Standards Relating to Pressure Vessel Openings under External Pressure" @default.
- W768784933 hasPublicationYear "2012" @default.
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