Ductile fracture prediction of EH36 grade steel based on Hosford–Coulomb model

Park, Sung-Ju; Lee, Kangsu; Cerik, Burak Can; Choung, Joonmo

doi:10.1080/17445302.2019.1565300

Cited by 27 publications

(11 citation statements)

References 38 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Various phenomenological fracture models were represented as stress triaxiality and Lode angle parameter, which were known as dominant variables in fracture behavior of ductile materials. In addition, the flow stress of EH36 steel was extracted by deriving the material constants of the Swift-Voce constitutive equation through the numerical analysis about the experiments performed in the precedent research (Park et al, 2019). It could be seen that the flow stress, which had presented through numerical analysis about each experiment, exactly analogized the behavior of the steel to the large strain section.…”

Section: Resultsmentioning

confidence: 99%

“…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%

“…3. Experiment and numerical analysis Table 2 Material constants for Swift-Voce parameter constitutive model (Park et al, 2019) of smooth specimen, respectively. The weighting factor () was determined to enable the load-displacement curve obtained through numerical analysis about NT specimens to have experimental value and minim error.…”

Section: Damage Evolution Modelmentioning

confidence: 99%

“…Bai and Wierzbicki (2008) proposed second-degree polynomial with stress triaxiality and Lode angle as functions. Bai and Wierzbicki (2010) This paper will evaluate various phenomenological fracture models using some of the precedent studies (Park et al, 2019). To this end, the theoretical background of the fracture model is reviewed, and each fracture model is expressed as fracture strain with functions of stress triaxiality and Lode angle parameter.…”

Section: Introductionmentioning

confidence: 99%

“…Tensile experimentThe fracture experiment about EH36 steel conducted in the precedent research(Park et al, 2019) was used as the experimental model for the calibration about material constants of the fracture model. Therefore, a brief description of fracture experiment and numerical analysis performed in the precedent experiment is required.Fig.…”

mentioning

confidence: 99%

See 4 more Smart Citations

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

Park

Lee²,

Cerik

et al. 2019

J. Ocean Eng. Technol.

Self Cite

View full text Add to dashboard Cite

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.

show abstract

Section: Resultsmentioning

confidence: 99%