Implosion tests of aluminium-alloy ring-stiffened cylinders subjected to external hydrostatic pressure

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In this paper, the dynamic implosion responses of ring-stiffened cylindrical tubes under external hydrostatic pressure are reported. The ring-stiffened cylinder models were fabricated from commercial seamless aluminium-alloy 6061-T6 tubes. Six external stiffened models were constructed: three models with three stiffeners, and the other three with five stiffeners. To quantify the effects of stiffening on the structural behaviour, implosion tests were also performed on another three unstiffened tube models. In this study, a total of nine tube models were tested until their failure. Implosion was initiated by increasing the hydrostatic pressure in the chamber until the tubes collapsed, and the effects of different types of pressurising media were investigated: (i) water only and (ii) water and nitrogen gas combined. The implosion pressure pulse near the collapsing tube was recorded during the event. The models with five stiffeners increased the implosion pressure pulse by approximately 3.5 times compared with the unstiffened model.
Publisher
ELSEVIER SCI LTD
Issue Date
2021-07
Language
English
Article Type
Article
Citation

MARINE STRUCTURES, v.78

ISSN
0951-8339
DOI
10.1016/j.marstruc.2021.102980
URI
http://hdl.handle.net/10203/286280
Appears in Collection
ME-Journal Papers(저널논문)
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