Numerical Analysis of Iceberg Impact Interaction with Ship Stiffened Plates Considering Low-temperature Characteristics of Steel

Nam, Woongshik

doi:10.26748/ksoe.2019.046

Cited by 2 publications

(2 citation statements)

References 23 publications

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“…The details of the stiffened-plate structures inside the hull containment structure, previously mentioned as the example, were determined by referring to the stiffened plate used in related studies (Kõrgesaar et al, 2018;Nam, 2019). The referenced stiffening plate meets the buckling requirements of FSICR ( 2008 As shown in Fig.…”

Section: Stiffened-plate Structures and Their Analytical And Numerica...mentioning

confidence: 99%

Study on Stiffened-Plate Structure Response in Marine Nuclear Reactor Operation Environment

Jeong,

Kim,

Hwang

2023

J. Ocean Eng. Technol.

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As the regulations on greenhouse gas emissions at sea become strict, efforts are being made to minimize environmental pollutants emitted from fossil fuels used by ships. Considering the large sizes of ships in conjunction with securing stable supplies of environment-friendly energy, interest in nuclear energy to power ships has been increasing. In this study, the neutron irradiation that occurs during the nuclear reactor operation and its effect on the structural responses of the stiffened-plate structures are investigated. This is done by changing the material properties of DH36 steel according to the research findings on the neutron-irradiated steels and then performing the structural response analyses of the structures using analytical and finite-element numerical solutions. Results reveal the influence of neutron irradiation on the structural responses of the structures. It is shown that both the strength and stiffness of the structures are affected by the neutron-irradiation phenomenon as their maximum flexural stress and deflection are increased with the increase in the amount of neutron irradiation. This implies that strength and stiffness need to be considered in the design of ships equipped with marine nuclear reactors.

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Section: Stiffened-plate Structures and Their Analytical And Numerica...mentioning

confidence: 99%

Study on Stiffened-Plate Structure Response in Marine Nuclear Reactor Operation Environment

Jeong,

Kim,

Hwang

2023

J. Ocean Eng. Technol.

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“…Future work in this area may involve exploiting the temperature effect term for extreme ambient temperatures, such as the low-temperature conditions in the Arctic Sea [39], cryogenic conditions in an LNG tank [40,41], and elevated temperatures associated with fire [42,43].…”

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confidence: 99%

Fracture Estimation in Ship Collision Analysis—Strain Rate and Thermal Softening Effects

Cerik¹,

Choung²

2021

Metals

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This study examined the effects of the strain rate and thermal softening on large-scale ductile fracture in ship collisions using a rate-dependent combined localized necking and fracture model. A Johnson–Cook type-hardening model, consisting of strain hardening, rate-sensitivity, and thermal softening terms, was adopted together with an associated flow rule. The temperature was treated as an internal state variable and was calculated from the plastic strain energy using a strain-rate-dependent weighting function under fully isothermal and adiabatic conditions. At every time increment, the fracture locus was updated based on the temporal strain rate, whereas the necking locus was coupled with the hardening law, which was dependent on both the strain rate and temperature. The damage indicator framework was used to consider the non-proportional loading paths. The dynamic shell-element failure model was verified through plate-panel penetration tests and applied to a large-scale ship collision analysis involving a struck ship/ship-shaped offshore installation and a supply vessel. The effects of the loading rate and impact energy were assessed in terms of the global behavior of the structure and observed failure modes.

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Numerical Analysis of Iceberg Impact Interaction with Ship Stiffened Plates Considering Low-temperature Characteristics of Steel

Cited by 2 publications

References 23 publications

Study on Stiffened-Plate Structure Response in Marine Nuclear Reactor Operation Environment

Study on Stiffened-Plate Structure Response in Marine Nuclear Reactor Operation Environment

Fracture Estimation in Ship Collision Analysis—Strain Rate and Thermal Softening Effects

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