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Instability of curved panels under external pressure: experiments and numerical analyses

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Abstract

The structural behavior of reinforced curved panels under uniform external pressure is investigated through experimental tests and numerical simulations. The collapse pressures and post-buckling characteristics of five panels are derived from tests conducted within a pressure vessel pressurized in a near volume control approach. The mechanical properties of the steel plates utilized in manufacturing the specimens are determined via tensile tests. Nonlinear finite element analyses are employed to replicate the physical experiments and subsequently conduct parametric studies. The impact of geometric parameters and imperfections on the collapse pressure and mode is assessed through parametric analyses, considering both clamped and simply supported boundary conditions. Imperfect geometries are incorporated into the numerical model utilizing the first buckling mode shape obtained from linearized stability analyses. It is observed that the simply supported condition has a significantly more detrimental effect compared to the clamped condition. It is observed that the simply supported condition has a significantly more detrimental effect compared to the clamped condition. The presented experimental results and numerical analyses offer valuable insights for the practical design of such reinforced panels.

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Notes

  1. Study originally published in Dutch in the 1940s, and later translated into English.

  2. Design of experiment method was first published by Fischer (1935) aiming to agricultural sector.

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Acknowledgements

The experimental work conducted in this study was carried out at the facilities of the Submarine Technology Laboratory-COPPE/UFRJ, whose staff deserve special acknowledgement from the authors.

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Authors and Affiliations

  1. Ocean Engineering Department, COPPE–Federal University of Rio de Janeiro, Rio de Janeiro, Brazil

    Andre Luiz Ramalho Marinho & Theodoro Antoun Netto

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  1. Andre Luiz Ramalho Marinho
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  2. Theodoro Antoun Netto
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Mr. ALRM authored the main manuscript text under the guidance of Dr. TAN. Mr. ALRM independently selected all figures and determined the contents of each table, which were subsequently submitted to Dr. TAN for approval. All authors participated in the review process of the manuscript.

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Correspondence to Andre Luiz Ramalho Marinho.

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Marinho, A.L.R., Netto, T.A. Instability of curved panels under external pressure: experiments and numerical analyses. J. Ocean Eng. Mar. Energy 9, 665–680 (2023). https://doi.org/10.1007/s40722-023-00290-1

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  • DOI: https://doi.org/10.1007/s40722-023-00290-1

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