Ductile Fracture Prediction of Steam Pipeline Steel

Zrilic, M.; Rakin, Marko; Sedmak, Aleksandar; Aleksić, Radoslav; Cvijović, Z.; Arsić, Miodrag

doi:10.4028/www.scientific.net/msf.518.537

Cited by 4 publications

(6 citation statements)

References 7 publications

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“…The more recent methods and approaches are focused to specific problems, including void coalescence criterion, detailed microstructural analysis, and the effect of size, shape, and distribution of voids . These micromechanical models have been successfully applied to several classes of problems, including pressure vessels, pipelines, and welded joints …”

Section: Micromechanical Modelling—local Approach To Fracturementioning

confidence: 99%

“…34 The more recent methods and approaches are focused to specific problems, including void coalescence criterion, detailed microstructural analysis, and the effect of size, shape, and distribution of voids. 121,122 These micromechanical models have been successfully applied to several classes of problems, including pressure vessels, [123][124][125] pipelines, 126,127 and welded joints. 128,129 Modelling of ductile fracture includes void nucleation around inclusions and second-phase particles, followed by their growth and coalescence (Figure 13).…”

Section: Micromechanical Modelling Of Ductile Fracturementioning

confidence: 99%

“…On one hand side, it was relatively simple model for brittle fracture, ie, cleavage, whereas more complex mechanisms of ductile fracture were modelled as a process of void nucleation, growth, and coalescence, which is the focus here. In this chapter, numerical methods, used for simulation of ductile fracture process, are presented as a compilation of previously accomplished research, followed by an overview of more recent results …”

Section: Micromechanical Modelling—local Approach To Fracturementioning

confidence: 99%

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Computational fracture mechanics: An overview from early efforts to recent achievements

Sedmak

2018

Fatigue Fract Eng Mat Struct

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An overview of the state of the art of computational fracture mechanics is presented, starting from early efforts and going all the way up to recent achievements. Some specific aspects of linear elastic and elastic plastic fracture mechanics problems have been discussed, including the fact that even for a static loading, numerical simulation is not a simple task because of complex geometries, material nonlinearity, and heterogeneity, and especially if crack growth is considered. Therefore, micromechanical modelling of elastic‐plastic crack growth is presented as new and promising approach to overcome some of the shortages of traditional approach. Besides static loading, couple of other important practical problems are tackled, like fatigue crack growth, with remaining life in the focus of investigation, using the empirical laws for crack growth rates. Numerical simulation of fatigue crack growth is inherently complex both because of complex material damage processes and lack of sound theoretical basis to define them. Therefore, combination of theoretical, experimental, and numerical approach is presented here to get reliable and efficient estimation of life under fatigue loading.

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Section: Micromechanical Modelling—local Approach To Fracturementioning

confidence: 99%

Section: Micromechanical Modelling Of Ductile Fracturementioning

confidence: 99%

Section: Micromechanical Modelling—local Approach To Fracturementioning

confidence: 99%

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Computational fracture mechanics: An overview from early efforts to recent achievements

Sedmak

2018

Fatigue Fract Eng Mat Struct

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“…New topics and new methods have been investigated with promising results including brittle-ductile transition, anisotropy, nonproportional, thermomechanical and dynamic loadings [17][18][19]. Applications have been developed for pressure pipelines, including pipe ring specimen testing and numerical simulation [20][21][22][23][24], steam turbines [25][26][27][28] and welded joints [10-13, 29, 30]. Initially developed in the context of steel structures, e.g.…”

Section: Introductionmentioning

confidence: 99%

Micromechanical modelling of ductile fracture – local approach

et al. 2020

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Micromechanical modelling of ductile fracture by using the local approach has been presented as the review of previously obtained results for welded joints made of low alloyed high strength steel. Experimental work was performed on 3PB specimens and tensile panels, which were then modelled by finite element method, using two- and three-dimensional meshes, respectively. The local approach was used to simulate both for crack initiation and growth during ductile fracture process.

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“…The most recent methods and approaches are focused to some of the problems, including void coalescence criterion, more detailed microstructural analysis, influence of various quantities (size, shape and distribution of voids)[69,70]. These micromechanical models have been successfully applied to several classes of problems, including pressure vessels[71][72][73], pipelines, inhomogeneous materials, and welded joints[18,74,75]. One of the most recent models is CGM (Complete Gurson Model)[17,26].…”

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confidence: 99%

Micromechanical fracture analysis of high strength steel weldments

Younise¹

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values of fracture mechanics parameter were experimentally and numerically obtained for specimens with a pre-crack in HAZ and WM. Numerical analysis of elastic-plastic finite element models (2D and 3D) was performed in software package Abaqus, with micromechanical complete Gurson model (CGM) applied through user subroutine, UMAT (author: Z.L. Zhang). The crack tip constraint and variation of stress triaxiality in ligament were numerically analyzed on single-edge notched bend and tensile specimens to analyze the transferability of micromechanical damage parameters from one specimen to another. In addition, the geometry effects were also studied by the micromechanical approach and the results were compared with those of the experiments. Most of numerical results obtained with CGM model are in good agreement with the experimental results. Analysis of results shows that micromechanical approach is reliable technique to describe ductile fracture behavior in high strength steel weldments, including the effect of constraints and heterogeneity. It was also observed that the initiation toughness and the crack growth resistance are greatly affected by the mechanical heterogeneity of the weldment and the crack tip constraint. Additionally, the numerical values of the initiation toughness and the crack growth resistance are also affected greatly by the size of finite element. Moreover, micromechanical damage parameters could be transferred from one component to another without depending on constraint effect etc. The results also show that estimation of mechanical properties for various welded regions, especially for narrow HAZ regions, could be considered as alternative technique to the standard one, which may not be applied to estimate their mechanical properties when welded joint is transversally subjected to applied load.

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Ductile Fracture Prediction of Steam Pipeline Steel

Cited by 4 publications

References 7 publications

Computational fracture mechanics: An overview from early efforts to recent achievements

Computational fracture mechanics: An overview from early efforts to recent achievements

Micromechanical modelling of ductile fracture – local approach

Micromechanical fracture analysis of high strength steel weldments

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