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Structural Engineering and Mechanics Volume 70, Number 4, May25 2019 , pages 431-443 DOI: https://doi.org/10.12989/sem.2019.70.4.431 |
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Numerical studies of the failure modes of ring-stiffened cylinders under hydrostatic pressure |
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Teguh Muttaqie, Do Quang Thang, Aditya Rio Prabowo, Sang-Rai Cho and Jung Min Sohn
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| Abstract | ||
| The present paper illustrates a numerical investigation on the failure behaviour of ring-stiffened cylinder subjected to external hydrostatic pressure. The published test data of steel welded ring-stiffened cylinder are surveyed and collected. Eight test models are chosen for the verification of the modelling and FE analyses procedures. The imperfection as the consequences of the fabrication processes, such as initial geometric deformation and residual stresses due to welding and cold forming, which reduced the ultimate strength, are simulated. The results show that the collapse pressure and failure mode predicted by the nonlinear FE analyses agree acceptably with the experimental results. In addition, the failure mode parameter obtained from the characteristic pressure such as interframe buckling pressure known as local buckling pressure, overall buckling pressure, and yield pressure are also examined through the collected data and shows a good correlation. A parametric study is then conducted to confirm the failure progression as the basic parameters such as the shell radius, thickness, overall length of the compartment, and stiffener spacing are varied. | ||
| Key Words | ||
| Ring-stiffened cylinders; collapse pressure; failure mode criterion; hydrostatic pressure test; non-linear FEA | ||
| Address | ||
| Teguh Muttaqie, Do Quang Thang, Aditya Rio Prabowo, Sang-Rai Cho and Jung Min Sohn Teguh Muttaqie,Jung Min Sohn: Department of Naval Architecture and Marine Systems Engineering, Pukyong National University, Busan, Republic of Korea Teguh Muttaqie: Agency for the Assessment and Application of Technology, Center of Technology for Defense and Security Industries - BPPT, Jakarta, Indonesia Do Quang Thang: Department of Naval Architecture and Ocean Engineering, Nha Trang University, Nha Trang, Viet Nam Aditya Rio Prabowo: Department of Mechanical Engineering, Sebelas Maret University, Surakarta, Indonesia Sang-Rai Cho: School of Naval Architecture and Ocean Engineering, University of Ulsan, Republic of Korea. Sang-Rai Cho: Ulsan Lab, Inc, Ulsan, Republic of Korea | ||