Journal
OCEAN ENGINEERING
Volume 250, Issue -, Pages -Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.oceaneng.2022.111057
Keywords
Egg-shaped shell; Free hydroforming; Buckling; External pressure
Funding
- National Natural Science Founda-tion of China [52071160, 52071203, 52171258]
- Excellent Youth Foundation of the Jiangsu Scientific Committee [BK20190103]
- Six Talent Climax Foundation of Jiangsu [KTHY-068]
- Fishery Engineering and Equipment Inno-vation Team of Shanghai High-level Local University
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This paper presents an experimental and numerical study on the hydroforming and buckling of an egg-shaped shell using a petal-shaped preform. The study shows that the internal pressure and weld seams play a significant role in the buckling behavior of the shell.
This paper describes an experimental and numerical study of the hydroforming and buckling of an egg-shaped shell based on a petal-shaped preform. The preform was welded from 12 meridionally interconnected bent petals with a uniform thickness of 1.38 mm. Before bending, the blanked petals had a maximum width of 69.1 mm and a length of 474.6 mm. Each welding line between adjacent petals corresponded to the meridian of the target egg-shaped shell. The petal-shaped preform was filled with tap water and internally pressurized for hydroforming. The hydroformed egg-shaped shell was immersed in a pressure chamber for hydrostatic testing. After the experiment, the nonlinear finite element method was used to numerically study the hydroforming and buckling of the egg-shaped shell and the effect of internal pressure and weld seams on the buckling.
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