A study on the effect of dynamic material strain on the dynamic crushing behavior of steel structures subjected to impact loads

Park, Young-IL; Cho, Jin Seong; Kim, Jeong‐Hwan

doi:10.5916/jamet.2023.47.1.16

Cited by 1 publication

(3 citation statements)

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“…Collision analysis was conducted by applying the material properties defined above, and the displacement values at the point with the maximum displacement were compared. (Park, 2017) in maximum deformation was only 0.2 mm. Fig.…”

Section: Validation Resultsmentioning

confidence: 79%

“…However, in this study, the ultimate strength and tensile strain were estimated from the yield strength of the material using Eqs. (1) and (2) proposed by Park (2017). Park derived the equations by the regression analyses of 7,737 mill sheets of mild and high-tensile steels.…”

Section: Materials Propertiesmentioning

confidence: 99%

“…In addition, the stress-strain curve based on the strain rate was estimated by applying Eqs. ( 6)-( 9) proposed by Park (2017) to consider the strain-rate effect of the material with instantaneous deformation. In this instance, 0.001, 1, 10, 30, 50, 80, 100, 200, and 1000 s -1 were considered for the strain rate.…”

Section: Materials Propertiesmentioning

confidence: 99%

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Tensile strength (MPa)  Yield strength (MPa)   True stress (MPa)   True yield strength (MPa)    True tensile strength (MPa)   True hardening start stress (MPa)   Dynamic yield stress (MPa)   Dynamic tensile stress (MPa)   Tensile strain   Yield strain   True strain   True yield strain    True tensile strain   True hardening start stain   Strain rate (s-1) IntroductionOffshore wind turbines offer advantages such as securing large installation space and abundant wind resources compared with onshore ones. However, complex risk factors arise from the sea. Among them, ultimate limit states (ULS), such as typhoons, are considered in the design phase of offshore wind turbines, whereas the accidental limit state (ALS), which may occur during the operating period, is not sufficiently considered. The ALS must be considered in the design phase because collision accidents with ships may occur during the operation of marine structures. Although the occurrence frequency is low, the risk of such accidents is high.In 2020, the fixed offshore wind turbine structure of the Borkum Rifgrund wind farm in Germany collided with a 26-m-long high-speed vessel (Renews, 2020). In 2021, a jack-up vessel mobilized for the installation of a wind farm in the waters of Huizhou City, China collided with a substructure (BBN, 2021). In 2022, the monopile substructure of a fixed offshore wind farm in the Netherlands North Sea collided with the bulk carrier "Julietta D," and the installed substructure was dismantled (Durakovik, 2022). In the Netherlands' Hallandse Kust Zuid offshore wind farm, a cargo ship collided with a

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Section: Validation Resultsmentioning

confidence: 79%

Section: Materials Propertiesmentioning

confidence: 99%