Modeling, testing and calibration of ductile crack formation in grade DH36 ship plates

Cerik, Burak Can; Park, Byoung-Jae; Park, Sung-Ju; Choung, Joonmo

doi:10.1016/j.marstruc.2019.03.003

Cited by 30 publications

(12 citation statements)

References 58 publications

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“…The effects of stress triaxiality on ductile fracture have been one of research topics [18][19][20][21][22][23][24]. The works of the Choung group have provided useful insights for ductile fracture behaviour of structural steels [14,[25][26][27][28][29][30][31][32].…”

Section: Literature Survey On Structural Behaviour At Cold (Sub-zero) Temperaturesmentioning

confidence: 99%

Ultimate Compressive Strength of Steel Stiffened-Plate Structures Triggered by Brittle Fracture under Cryogenic Conditions

Lee¹,

Paik²,

Ringsberg³

et al. 2022

Low-Temperature Technologies and Applications

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This chapter presents a practical method to investigate the effects of brittle fracture on the ultimate compressive strength of steel stiffened-plate structures under cryogenic conditions. Computational models are developed to analyse the ultimate compressive strength of steel stiffened-plate structures, triggered by brittle fracture, under cryogenic condition. A phenomenological form of the material model for the high-strength steel at cryogenic condition is proposed, that takes into account the Bauschinger effect, and implemented into a nonlinear finite element solver (LS-DYNA). Comparison between computational predictions and experimental measurements is made for the ultimate compressive strength response of a full-scale steel stiffened-plate structure, showing a good agreement between them.

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Section: Literature Survey On Structural Behaviour At Cold (Sub-zero) Temperaturesmentioning

confidence: 99%

Ultimate Compressive Strength of Steel Stiffened-Plate Structures Triggered by Brittle Fracture under Cryogenic Conditions

Lee¹,

Paik²,

Ringsberg³

et al. 2022

Low-Temperature Technologies and Applications

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“…Therefore, there are only , ,  remaining as the material constants of the fracture model. The HC model has been used by many researchers in recent years because the number of model constants is smaller than that of other fracture models and the material constants can be determined with a minimum of experiments (Roth and Mohr, 2016;Erice et al, 2017;Park et al, 2019;Cerik et al, 2019b).…”

Section: Theoretical Background 21 Stress State Parametersmentioning

confidence: 99%

Comparative Study on Various Ductile Fracture Models for Marine Structural Steel EH36

Park

Lee²,

Cerik

et al. 2019

J. Ocean Eng. Technol.

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It is important to obtain reasonable predictions of the extent of the damage during maritime accidents such as ship collisions and groundings. Many fracture models based on different mechanical backgrounds have been proposed and can be used to estimate the extent of damage involving ductile fracture. The goal of this study was to compare the damage extents provided by some selected fracture models. Instead of performing a new series of material constant calibration tests, the fracture test results for the ship building steel EH36 obtained by Park et al. (2019) were used which included specimens with different geometries such as central hole, pure shear, and notched tensile specimens. The test results were compared with seven ductile fracture surfaces: Johnson-Cook, Cockcroft-Latham-Oh, Bai-Wierzbicki, Modified Mohr-Coulomb, Lou-Huh, Maximum shear stress, and Hosford-Coulomb. The linear damage accumulation law was applied to consider the effect of the loading path on each fracture surface. The Swift-Voce combined constitutive model was used to accurately define the flow stress in a large strain region. The reliability of these simulations was verified by the good agreement between the axial tension force elongation relations captured from the tests and simulations without fracture assignment. The material constants corresponding to each fracture surface were calibrated using an optimization technique with the minimized object function of the residual sum of errors between the simulated and predicted stress triaxiality and load angle parameter values to fracture initiation.

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“…Therefore, it was noted that the assumptions behind the models are of less importance as compared to the mathematical flexibility that can cover a wide range of stress states. The calibrations and applications of one of these advanced fracture models, namely the Hosford-Coulomb model, were presented by the present authors in a series of recent papers for marine structural steels and low-velocity impact problems [29][30][31][32][33][34][35][36]. On the other hand, despite their ease of calibration and good prediction capability for certain ranges of stress states, MSS and CL criteria lack mathematical flexibility, yielding high calibration errors in general.…”

Section: Introductionmentioning

confidence: 99%

“…Cerik et al [32] published the test results for grade DH36 steel and Park et al [28] presented the data for AH36. The tests for A grade are reported in the present study.…”

mentioning

confidence: 99%

Ductile Fracture Behavior of Mild and High-Tensile Strength Shipbuilding Steels

Cerik

Choung

2020

Applied Sciences

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A comparison is made of the ductility limits of one mild (normal) and two high-tensile strength shipbuilding steels with an emphasis on stress state and loading path dependency. To describe the ductile fracture behavior of the considered steels accurately, an alternative form of ductile fracture prediction model is presented and calibrated. The present fracture model combines the normalized Cockcroft–Latham and maximum shear stress criterion, and is dependent on both stress triaxiality and Lode angle parameter. The calibrations indicate that, depending on the hardening characteristics of the steels, ductile fracture behavior differs considerably with stress state. It is demonstrated that the adopted fracture model is able to predict the ductile fracture initiation in various test specimens with good accuracy and is flexible in addressing the observed differences in the ductile fracture behavior of the considered steel grades.

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Modeling, testing and calibration of ductile crack formation in grade DH36 ship plates

Cited by 30 publications

References 58 publications

Ultimate Compressive Strength of Steel Stiffened-Plate Structures Triggered by Brittle Fracture under Cryogenic Conditions

Ultimate Compressive Strength of Steel Stiffened-Plate Structures Triggered by Brittle Fracture under Cryogenic Conditions

Comparative Study on Various Ductile Fracture Models for Marine Structural Steel EH36

Ductile Fracture Behavior of Mild and High-Tensile Strength Shipbuilding Steels

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