Lubis, Asnawi and Savetlana, Shirley and Suudi, Ahmad
(2013)
*The Influence of Radius Ratio and Cross Section Ovality on Limit Pressure of
LPG Toroidal Tanks.*
In: The 12th Annual Nasional Seminar Of Mechanical Engineering (SNTTM XII)/JSME, 23-24 Oktober 2013, Bandar Lampung.

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## Abstract

This paper reports a series of finite element study of the influence of radius ratio and crosssection ovality on limit pressure of LPG toroidal tanks. The tanks were modeled for 45 liter water capacity. The influence of radius ratio of 2, 2.5, 3, and 4 were investigated. For every radius ratio, the ovality of cross section range from 0.4 for in-plane ovality to -0.4 for out-ofplane ovality were investigated. Major axis of oval cross-section was from extrados to intrados for in-plane ovality and from crown to crown for out-of-plane ovality. Shell element type was used in the finite element modeling. The material response to loading was assumed elastic-perfectly-plastic. Limit pressure were obtained via nonlinear analysis using Newton- Raphson algorithm and presented in non-dimensional forms. The results show that for inplane ovality of cross-section, maximum ovality is 0.2 for radius ratio of 2.5, 3, and 4, and 0.16 for radius ratio of 2. For out-of-plane ovality of cross-section, maximum ovality is -0.3 for radius ratio of 2, 3, and 4, but only -0.24 for radius ratio of 2.5. For radius ratio of 2.5, 3, and 4, circular cross-section toroidal tank has a limit pressure greater than those with ovality. Peculiar behavior was found for radius ratio of 2, where cross-section with out-of-plane ovality of -0.2 and -0.3 produced higher limit pressure than of circular cross section. In general, ovality of 0.2 for in-plane and -0.2 for out-of-plane are the maximum ovality that could be developed for further design of a toroidal tank.

Item Type: | Conference or Workshop Item (Paper) |
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Subjects: | T Technology > T Technology (General) T Technology > TJ Mechanical engineering and machinery |

Divisions: | Fakultas Teknik (FT) > Prodi Teknik Mesin |

Depositing User: | Dr Shirley Savetlana |

Date Deposited: | 29 Nov 2021 01:24 |

Last Modified: | 29 Nov 2021 01:24 |

URI: | http://repository.lppm.unila.ac.id/id/eprint/37081 |

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