This paper reports a nonlinear parametric finite element study of pressurized circular toroidal tank with non-radial cylindrical nozzle. Following to previous study by one of the authors who shows that radius ratio of 4 gives the highest limit pressure, the study was extended to determine the position of non-radial cylindrical nozzle that gives the highest limit pressure. Toroidal tank having the same volume as PERTAMINA LPG 3kg of 7.3 liter and radius ratio of 4 were used in this study. Cylindrical nozzle of 12.5 mm diameter and 10 mm height was attached perpendicular to plane of the toroid. The position of nozzle was made various along a major radius of the torus, from intrados to intrados. The position of nozzle was varied every 5 mm, from 115 mm to 210 mm. The maximum applied internal pressure was 1.5 times pressure to yield. Limits pressure were obtained via nonlinear finite element analysis using the well-known Newton-Raphson algorithm with large deformation. It was found that the best design for nozzle position, indicated by the highest limit pressure, is located between crown and extrados and close to extrados. This result conforms to the membrane theory that the highest stress occurs at the intrados and nozzle shall not be located next to that location.
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