Prediction of ductile fracture initiation using micromechanical analysis

Rakin, Marko; Cvijović, Z.; Grabulov, Vencislav; Putić, Slaviša; Sedmak, Aleksandar

doi:10.1016/s0013-7944(03)00013-4

Cited by 46 publications

(37 citation statements)

References 18 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…It has been shown elsewhere [10] that, in case of application of the reduced Gauss integration, the FE size in front of the crack tip approximates to an average value o f the mean path X. This result is in accordance with previous research [11,12].…”

Section: представлены результаты комплексного расчетно-экспериментальsupporting

confidence: 91%

“…2b). It has turned out [10] that the FE-size in front of a crack tip significantly affects the accuracy of modeling of crack growth initiation. The question is how to define the FE size at a crack tip and get an actual result at the beginning of a crack growth for the parameters of fracture mechanics that quantify the onset of a crack growth: J-integral ( J t) or crack tip opening displacement, CTOD (d 5i).…”

Section: представлены результаты комплексного расчетно-экспериментальmentioning

confidence: 99%

“…Therefore the FE size o f 0.25 X 0.25 mm in ligament is adopted. The quadratic FE is used, since no significant influence of test direction on the mean free path X has been observed [10]. ./-integral corresponding to the onset o f the crack growth has been calculated based on the work o f an external force, below the numerically obtained curve, according to [8].…”

Section: представлены результаты комплексного расчетно-экспериментальmentioning

confidence: 99%

See 2 more Smart Citations

Micromechanical Coupled Study of Crack Growth Initiation Criterion in Pressure Vessel Steel

Rakin

Sedmak

Cvijović³

et al. 2004

Strength of Materials

Self Cite

View full text Add to dashboard Cite

К лю чевы е слова: комплексное микромеханическое моделирование, доля объемных пустот, метод конечных элементов, критерий развития трещины.Introduction. Micromechanism of ductile fracture o f most metals and alloys includes void nucleation, growth and coalescence. In steels, voids nucleate at non-metallic inclusions and second-phase particles. Micromechanical approach to fracture mechanics has been introduced in an effort to describe the process of fracture in a way that is as close to the actual phenomena in a material as possible. Such an approach is based on the models that account for and quantify the process o f microscopic damages, in order to predict macroscopic failure.Micromechanical approach to the analysis o f ductile fracture requires combined experimental and numerical procedure. According to the uncoupled micromechanical damage models, the damage parameter is calculated in postprocessing phase of the finite element (FE) analysis. In the coupled micromechanical models, one or more damage parameters are calculated to

show abstract

Section: представлены результаты комплексного расчетно-экспериментальsupporting

confidence: 91%

Section: представлены результаты комплексного расчетно-экспериментальmentioning

confidence: 99%

Section: представлены результаты комплексного расчетно-экспериментальmentioning

confidence: 99%

See 1 more Smart Citation

Micromechanical Coupled Study of Crack Growth Initiation Criterion in Pressure Vessel Steel

Rakin

Sedmak

Cvijović³

et al. 2004

Strength of Materials

Self Cite

View full text Add to dashboard Cite

show abstract

“…Around thirty images are processed for each surface, in order to calculate the surface area of the inclusions, S i , and the total surface area scanned, S T . If a random distribution of inclusions is assumed, it is possible to estimate the volume fraction of inclu- sions V I by assuming that it is equivalent to the surface fraction S I [27]. Table 2 summarizes the inclusion volume fraction determined for the three orthogonal planes of the material.…”

Section: Microscopic Analysis Of Inclusionsmentioning

confidence: 99%

“…The initial voids volume fraction has been determined from microstructural observations (Section 2.2) and methods recommended in the literature [27,[33][34][35]. In this work, the initial void volume fraction is estimated by the inclusions volume fraction, which corresponds to f 0 = 0.0015.…”

Section: The Initial Void Volume Fractionmentioning

confidence: 99%

Experimental characterization and numerical modeling of micromechanical damage under different stress states

et al. 2013

View full text Add to dashboard Cite

is an open access repository that collects the work of Arts et Métiers ParisTech researchers and makes it freely available over the web where possible. The use of HSLA steels for the manufacture of automotive components is interesting from an engineering point of view. This family of steels, while possessing high strength, also has good formability and can be used in forming manufacturing processes. In some forming processes such as blanking, shear strain localization occurs, which causes damage and results in the final fracture of the material. This paper presents an experimental study based on in situ tests to understand and identify the physical mechanisms of ductile damage under two stress states: tension and shear. Different macroscopic tests were performed to calibrate a damage model based on a micromechanical approach. This damage model is based on the Gurson-Tvergaard-Needleman theory and presents recent improvements proposed by Nahshon and Hutchinson and by Nielsen and Tvergaard so as to better predict fracture under a wide range of stress states, especially with low levels of stress triaxiality. These extensions have made the identification of the material parameter more complicated. In this work an identification strategy has been proposed using tests on specimens with different shapes. The identified parameter values are validated and the fracture model show good predictive capability over a wide stress state range.

show abstract

Determination of Parameters of Local Approach to Ductile Fracture of Steel Using Combined Experimental-Numerical Procedure

Rakin

Zrilić

Gubeljak

et al. 2007

Experimental Analysis of Nano and Engineering Materials and Structures

View full text Add to dashboard Cite

Prediction of ductile fracture initiation using micromechanical analysis

Cited by 46 publications

References 18 publications

Micromechanical Coupled Study of Crack Growth Initiation Criterion in Pressure Vessel Steel

Micromechanical Coupled Study of Crack Growth Initiation Criterion in Pressure Vessel Steel

Experimental characterization and numerical modeling of micromechanical damage under different stress states

Determination of Parameters of Local Approach to Ductile Fracture of Steel Using Combined Experimental-Numerical Procedure

Contact Info

Product

Resources

About