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

Muttaqie, Teguh; Park, Sang Hyun; Sohn, Jung Min; Cho, Sang-Rai; Nho, In Sik; Han, Sangmin; Cho, Yoon Sik

doi:10.1016/j.marstruc.2021.102980

Cited by 12 publications

(2 citation statements)

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“…This is because in contrast to ASME BPVC-X, NASA SP-8007 requires a longitudinal/circumferential wave number of buckling The FE results match well against the experimental data of Section 2.2.2. This is also confirmed in several references [7][8][9][10]12,14]. Based on these comparisons, the accuracy of design codes for the prediction of collapse strength could be considered insufficient.…”

Section: Comparison Against Engineering Standardssupporting

confidence: 57%

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Development of Numerical Modelling Techniques for Composite Cylindrical Structures under External Pressure

Sohn

Hirdaris

Romanoff

et al. 2022

JMSE

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Submarine hulls are pressure vessels for which excellent structural integrity under underwater pressure loads is essential. The use of light-weight materials contributes to reduced fuel consumption, improved speed, and increased payload while strength properties are retained. The focus of this paper is on the collapse behavior of a filament-wound cylindrical structure that serves as the main hull of a submarine subject to hydrostatic pressure loads. This paper presents a computational modelling approach for the prediction of the collapse behavior mechanism using a commercial finite element (FE) solver. The collapse strength obtained from the numerical model corresponded closely to available experimental data. The composite and aluminum material models were compared and the effects of stacking angle and thickness portion in the ply sequence on collapse strength were investigated. The advantages and disadvantages of available design codes (i.e., American Society of Mechanical Engineers (ASME) BPVC-X and National Aeronautics and Space Administration (NASA) SP-8007) were reviewed by direct comparison with numerical results. It is concluded that the application of effective engineering constants for the prediction of the collapse pressure of submarine hulls may be feasible.

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