TY  - CONF
AU  - Zrilić, Milorad
AU  - Rakin, Marko
AU  - Međo, Bojan
AU  - Cvijović, Z.
AU  - Sedmak, Aleksandar
PY  - 2008
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/780
AB  - In the paper, the level of damage of steam pipeline steel after about 100,000 hours at 540°C (1004 °F) under pressure of 42 bars (609 PSI) is analyzed. Material degradation is estimated using a combined experimental and numerical procedure based on micromechanical or local approach to fracture. Detailed analysis is conducted on the samples taken from exploited - used steel and from unused - new steel of the same designation. Damage parameter - void growth ratio - is determined using round notched specimens, (including various notch radii). A comparison of the values for critical void growth ratio, computed for tested steels is made. Based on the values obtained, the possibility of prolongation of the operating life of used steel is discussed.
C3  - American Society of Mechanical Engineers, Pressure Vessels and Piping Division (Publication) PVP
T1  - Evaluation of damage of steam pipeline steel using local approach to fracture
EP  - 12
SP  - 7
VL  - 7
DO  - 10.1115/PVP2008-61265
ER  - 

@conference{
author = "Zrilić, Milorad and Rakin, Marko and Međo, Bojan and Cvijović, Z. and Sedmak, Aleksandar",
year = "2008",
abstract = "In the paper, the level of damage of steam pipeline steel after about 100,000 hours at 540°C (1004 °F) under pressure of 42 bars (609 PSI) is analyzed. Material degradation is estimated using a combined experimental and numerical procedure based on micromechanical or local approach to fracture. Detailed analysis is conducted on the samples taken from exploited - used steel and from unused - new steel of the same designation. Damage parameter - void growth ratio - is determined using round notched specimens, (including various notch radii). A comparison of the values for critical void growth ratio, computed for tested steels is made. Based on the values obtained, the possibility of prolongation of the operating life of used steel is discussed.",
journal = "American Society of Mechanical Engineers, Pressure Vessels and Piping Division (Publication) PVP",
title = "Evaluation of damage of steam pipeline steel using local approach to fracture",
pages = "12-7",
volume = "7",
doi = "10.1115/PVP2008-61265"
}

Zrilić, M., Rakin, M., Međo, B., Cvijović, Z.,& Sedmak, A.. (2008). Evaluation of damage of steam pipeline steel using local approach to fracture. in American Society of Mechanical Engineers, Pressure Vessels and Piping Division (Publication) PVP, 7, 7-12.
https://doi.org/10.1115/PVP2008-61265

Zrilić M, Rakin M, Međo B, Cvijović Z, Sedmak A. Evaluation of damage of steam pipeline steel using local approach to fracture. in American Society of Mechanical Engineers, Pressure Vessels and Piping Division (Publication) PVP. 2008;7:7-12.
doi:10.1115/PVP2008-61265 .

Zrilić, Milorad, Rakin, Marko, Međo, Bojan, Cvijović, Z., Sedmak, Aleksandar, "Evaluation of damage of steam pipeline steel using local approach to fracture" in American Society of Mechanical Engineers, Pressure Vessels and Piping Division (Publication) PVP, 7 (2008):7-12,
https://doi.org/10.1115/PVP2008-61265 . .

TY  - JOUR
AU  - Zrilić, Milorad
AU  - Rakin, Marko
AU  - Sedmak, Aleksandar
AU  - Aleksić, R.
AU  - Cvijović, Z.
AU  - Arsić, M.
PY  - 2006
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/629
AB  - Considering the conditions to which steels used for the manufacture of steam pipelines are exposed, the micromechanism of their destruction in exploitation is exclusively the ductile one. In order to make an estimation of the level of the damage that occurs in exploitation, in this paper a combined experimental and numerical procedure has been developed based on micromechanical or local approach to the fracture mechanics of metallic materials. After the analysis of the results obtained for micromechanical criterion of failure for virgin steel and that used in the steam pipeline, a proposal for prolongation of the working life of tested steel for steam pipelines until the next overhaul is given.
PB  - Trans Tech Publications Ltd, Durnten-Zurich
T2  - Recent Developments in Advanced Materials and Processes
T1  - Ductile fracture prediction of steam pipeline steel
EP  - 542
SP  - 537
VL  - 518
DO  - 10.4028/www.scientific.net/MSF.518.537
ER  - 

@article{
author = "Zrilić, Milorad and Rakin, Marko and Sedmak, Aleksandar and Aleksić, R. and Cvijović, Z. and Arsić, M.",
year = "2006",
abstract = "Considering the conditions to which steels used for the manufacture of steam pipelines are exposed, the micromechanism of their destruction in exploitation is exclusively the ductile one. In order to make an estimation of the level of the damage that occurs in exploitation, in this paper a combined experimental and numerical procedure has been developed based on micromechanical or local approach to the fracture mechanics of metallic materials. After the analysis of the results obtained for micromechanical criterion of failure for virgin steel and that used in the steam pipeline, a proposal for prolongation of the working life of tested steel for steam pipelines until the next overhaul is given.",
publisher = "Trans Tech Publications Ltd, Durnten-Zurich",
journal = "Recent Developments in Advanced Materials and Processes",
title = "Ductile fracture prediction of steam pipeline steel",
pages = "542-537",
volume = "518",
doi = "10.4028/www.scientific.net/MSF.518.537"
}

Zrilić, M., Rakin, M., Sedmak, A., Aleksić, R., Cvijović, Z.,& Arsić, M.. (2006). Ductile fracture prediction of steam pipeline steel. in Recent Developments in Advanced Materials and Processes
Trans Tech Publications Ltd, Durnten-Zurich., 518, 537-542.
https://doi.org/10.4028/www.scientific.net/MSF.518.537

Zrilić M, Rakin M, Sedmak A, Aleksić R, Cvijović Z, Arsić M. Ductile fracture prediction of steam pipeline steel. in Recent Developments in Advanced Materials and Processes. 2006;518:537-542.
doi:10.4028/www.scientific.net/MSF.518.537 .

Zrilić, Milorad, Rakin, Marko, Sedmak, Aleksandar, Aleksić, R., Cvijović, Z., Arsić, M., "Ductile fracture prediction of steam pipeline steel" in Recent Developments in Advanced Materials and Processes, 518 (2006):537-542,
https://doi.org/10.4028/www.scientific.net/MSF.518.537 . .

TY  - CONF
AU  - Zrilić, Milorad
AU  - Rakin, Marko
AU  - Cvijović, Z.
AU  - Sedmak, Aleksandar
AU  - Sedmak, S.
PY  - 2006
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/661
PB  - Kluwer Academic Publishers
C3  - Fracture of Nano and Engineering Materials and Structures - Proceedings of the 16th European Confere
T1  - Structural integrity assessment by local approach to fracture
EP  - 1070
SP  - 1069
DO  - 10.1007/1-4020-4972-2_530
ER  - 

@conference{
author = "Zrilić, Milorad and Rakin, Marko and Cvijović, Z. and Sedmak, Aleksandar and Sedmak, S.",
year = "2006",
publisher = "Kluwer Academic Publishers",
journal = "Fracture of Nano and Engineering Materials and Structures - Proceedings of the 16th European Confere",
title = "Structural integrity assessment by local approach to fracture",
pages = "1070-1069",
doi = "10.1007/1-4020-4972-2_530"
}

Zrilić, M., Rakin, M., Cvijović, Z., Sedmak, A.,& Sedmak, S.. (2006). Structural integrity assessment by local approach to fracture. in Fracture of Nano and Engineering Materials and Structures - Proceedings of the 16th European Confere
Kluwer Academic Publishers., 1069-1070.
https://doi.org/10.1007/1-4020-4972-2_530

Zrilić M, Rakin M, Cvijović Z, Sedmak A, Sedmak S. Structural integrity assessment by local approach to fracture. in Fracture of Nano and Engineering Materials and Structures - Proceedings of the 16th European Confere. 2006;:1069-1070.
doi:10.1007/1-4020-4972-2_530 .

Zrilić, Milorad, Rakin, Marko, Cvijović, Z., Sedmak, Aleksandar, Sedmak, S., "Structural integrity assessment by local approach to fracture" in Fracture of Nano and Engineering Materials and Structures - Proceedings of the 16th European Confere (2006):1069-1070,
https://doi.org/10.1007/1-4020-4972-2_530 . .

TY  - CONF
AU  - Rakin, Marko
AU  - Sedmak, Aleksandar
AU  - Cvijović, Z.
AU  - Zrilić, Milorad
AU  - Sedmak, Stojan
PY  - 2004
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/394
AB  - We present results of the combined design-theoretical investigation of the mechanism of crack growth at the onset of ductile fracture of NPP reactor pressure vessels. Micromechanical approach to the prediction of ductile fracture has been applied, according to which the volume fraction of voids in the deformed material is determined by the finite-element method. On the basis of CT-specimen tests and known damage parameters, determined for smooth spherical specimens, we propose a micromechanical criterion of crack growth initiation for ductile fracture.
C3  - Strength of Materials
T1  - Micromechanical coupled study of crack growth initiation criterion in pressure vessel steel
EP  - 36
IS  - 1
SP  - 33
VL  - 36
DO  - 10.1023/B:STOM.0000020111.90136.97
ER  - 

@conference{
author = "Rakin, Marko and Sedmak, Aleksandar and Cvijović, Z. and Zrilić, Milorad and Sedmak, Stojan",
year = "2004",
abstract = "We present results of the combined design-theoretical investigation of the mechanism of crack growth at the onset of ductile fracture of NPP reactor pressure vessels. Micromechanical approach to the prediction of ductile fracture has been applied, according to which the volume fraction of voids in the deformed material is determined by the finite-element method. On the basis of CT-specimen tests and known damage parameters, determined for smooth spherical specimens, we propose a micromechanical criterion of crack growth initiation for ductile fracture.",
journal = "Strength of Materials",
title = "Micromechanical coupled study of crack growth initiation criterion in pressure vessel steel",
pages = "36-33",
number = "1",
volume = "36",
doi = "10.1023/B:STOM.0000020111.90136.97"
}

Rakin, M., Sedmak, A., Cvijović, Z., Zrilić, M.,& Sedmak, S.. (2004). Micromechanical coupled study of crack growth initiation criterion in pressure vessel steel. in Strength of Materials, 36(1), 33-36.
https://doi.org/10.1023/B:STOM.0000020111.90136.97

Rakin M, Sedmak A, Cvijović Z, Zrilić M, Sedmak S. Micromechanical coupled study of crack growth initiation criterion in pressure vessel steel. in Strength of Materials. 2004;36(1):33-36.
doi:10.1023/B:STOM.0000020111.90136.97 .

Rakin, Marko, Sedmak, Aleksandar, Cvijović, Z., Zrilić, Milorad, Sedmak, Stojan, "Micromechanical coupled study of crack growth initiation criterion in pressure vessel steel" in Strength of Materials, 36, no. 1 (2004):33-36,
https://doi.org/10.1023/B:STOM.0000020111.90136.97 . .

TY  - JOUR
AU  - Rakin, Marko
AU  - Cvijović, Z
AU  - Grabulov, Vencislav
AU  - Gubeljak, Nenad
AU  - Sedmak, Aleksandar
PY  - 2004
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/433
AB  - In this paper the quantitative microstructural analysis of low-alloyed pressure vessel steel has been discussed. The values of volume fraction and mean free path of non-metallic inclusions determined in that way were used in the numerical analysis. A series of elastic-plastic calculations of round smooth specimen and compact tension (CT) specimen was made using Finite elements (FE) method under conditions of ductile fracture initiation of tested steel, followed by large plastic deformation. The influence of microstructure of tested ferritic steel on crack initiation and growth was considered using two micromechanical models.
PB  - Trans Tech Publications Ltd, Durnten-Zurich
T2  - Progress in Advanced Materials and Processes
T1  - The influence of microstructure on ductile fracture initiation in low-alloyed steel
EP  - 180
SP  - 175
VL  - 453-454
DO  - 10.4028/www.scientific.net/MSF.453-454.175
ER  - 

@article{
author = "Rakin, Marko and Cvijović, Z and Grabulov, Vencislav and Gubeljak, Nenad and Sedmak, Aleksandar",
year = "2004",
abstract = "In this paper the quantitative microstructural analysis of low-alloyed pressure vessel steel has been discussed. The values of volume fraction and mean free path of non-metallic inclusions determined in that way were used in the numerical analysis. A series of elastic-plastic calculations of round smooth specimen and compact tension (CT) specimen was made using Finite elements (FE) method under conditions of ductile fracture initiation of tested steel, followed by large plastic deformation. The influence of microstructure of tested ferritic steel on crack initiation and growth was considered using two micromechanical models.",
publisher = "Trans Tech Publications Ltd, Durnten-Zurich",
journal = "Progress in Advanced Materials and Processes",
title = "The influence of microstructure on ductile fracture initiation in low-alloyed steel",
pages = "180-175",
volume = "453-454",
doi = "10.4028/www.scientific.net/MSF.453-454.175"
}

Rakin, M., Cvijović, Z., Grabulov, V., Gubeljak, N.,& Sedmak, A.. (2004). The influence of microstructure on ductile fracture initiation in low-alloyed steel. in Progress in Advanced Materials and Processes
Trans Tech Publications Ltd, Durnten-Zurich., 453-454, 175-180.
https://doi.org/10.4028/www.scientific.net/MSF.453-454.175

Rakin M, Cvijović Z, Grabulov V, Gubeljak N, Sedmak A. The influence of microstructure on ductile fracture initiation in low-alloyed steel. in Progress in Advanced Materials and Processes. 2004;453-454:175-180.
doi:10.4028/www.scientific.net/MSF.453-454.175 .

Rakin, Marko, Cvijović, Z, Grabulov, Vencislav, Gubeljak, Nenad, Sedmak, Aleksandar, "The influence of microstructure on ductile fracture initiation in low-alloyed steel" in Progress in Advanced Materials and Processes, 453-454 (2004):175-180,
https://doi.org/10.4028/www.scientific.net/MSF.453-454.175 . .

TY  - JOUR
AU  - Rakin, Marko
AU  - Cvijović, Z
AU  - Grabulov, Vencislav
AU  - Putić, Slaviša
AU  - Sedmak, Aleksandar
PY  - 2004
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/453
AB  - In the paper ductile fracture initiation analysis of low-alloyed ferritic steel has been made by application of two micromechanical models: the Rice-Tracey void growth model and the Gurson-Tvergaard-Needleman (GTN) model. The aim of the study was to analyse transferability of micromechanical parameters determined on specimens without initial crack to pre-cracked specimens. A significant part of the research has been carried out through participation in the round robin project organised by the European Structural Integrity Society (ESIS). Tensile tests have been performed on cylindrical smooth specimens and CT specimens. Critical values of micromechanical parameters determined on smooth specimen for both applied models, have been used for prediction of the crack growth initiation in CT specimen. Modelling of the first phase of ductile fracture-void nucleation-has been carried out using quantitative metallographic analysis of non-metallic inclusion content in tested steel. For determination of critical values of model parameters corresponding to ductile fracture initiation a simple procedure has been applied based on a combination of experimental and numerical results. Evaluated J-integral values corresponding to onset of crack growth, J(i), are in good agreement with experimental result and both models have proved to be suitable for determination of the ductile fracture initiation in tested steel. The effect of FE size at a crack tip on J(i)-value has been particularly analysed: it has been established that the calculation with FE size corresponding to the mean free path), between inclusions in steel gives results that are in accordance with the experimental ones.
PB  - Pergamon-Elsevier Science Ltd, Oxford
T2  - Engineering Fracture Mechanics
T1  - Prediction of ductile fracture initiation using micromechanical analysis
EP  - 827
IS  - 4-6
SP  - 813
VL  - 71
DO  - 10.1016/S0013-7944(03)00013-4
ER  - 

@article{
author = "Rakin, Marko and Cvijović, Z and Grabulov, Vencislav and Putić, Slaviša and Sedmak, Aleksandar",
year = "2004",
abstract = "In the paper ductile fracture initiation analysis of low-alloyed ferritic steel has been made by application of two micromechanical models: the Rice-Tracey void growth model and the Gurson-Tvergaard-Needleman (GTN) model. The aim of the study was to analyse transferability of micromechanical parameters determined on specimens without initial crack to pre-cracked specimens. A significant part of the research has been carried out through participation in the round robin project organised by the European Structural Integrity Society (ESIS). Tensile tests have been performed on cylindrical smooth specimens and CT specimens. Critical values of micromechanical parameters determined on smooth specimen for both applied models, have been used for prediction of the crack growth initiation in CT specimen. Modelling of the first phase of ductile fracture-void nucleation-has been carried out using quantitative metallographic analysis of non-metallic inclusion content in tested steel. For determination of critical values of model parameters corresponding to ductile fracture initiation a simple procedure has been applied based on a combination of experimental and numerical results. Evaluated J-integral values corresponding to onset of crack growth, J(i), are in good agreement with experimental result and both models have proved to be suitable for determination of the ductile fracture initiation in tested steel. The effect of FE size at a crack tip on J(i)-value has been particularly analysed: it has been established that the calculation with FE size corresponding to the mean free path), between inclusions in steel gives results that are in accordance with the experimental ones.",
publisher = "Pergamon-Elsevier Science Ltd, Oxford",
journal = "Engineering Fracture Mechanics",
title = "Prediction of ductile fracture initiation using micromechanical analysis",
pages = "827-813",
number = "4-6",
volume = "71",
doi = "10.1016/S0013-7944(03)00013-4"
}

Rakin, M., Cvijović, Z., Grabulov, V., Putić, S.,& Sedmak, A.. (2004). Prediction of ductile fracture initiation using micromechanical analysis. in Engineering Fracture Mechanics
Pergamon-Elsevier Science Ltd, Oxford., 71(4-6), 813-827.
https://doi.org/10.1016/S0013-7944(03)00013-4

Rakin M, Cvijović Z, Grabulov V, Putić S, Sedmak A. Prediction of ductile fracture initiation using micromechanical analysis. in Engineering Fracture Mechanics. 2004;71(4-6):813-827.
doi:10.1016/S0013-7944(03)00013-4 .

Rakin, Marko, Cvijović, Z, Grabulov, Vencislav, Putić, Slaviša, Sedmak, Aleksandar, "Prediction of ductile fracture initiation using micromechanical analysis" in Engineering Fracture Mechanics, 71, no. 4-6 (2004):813-827,
https://doi.org/10.1016/S0013-7944(03)00013-4 . .

TY  - JOUR
AU  - Rakin, Marko
AU  - Cvijović, Z
AU  - Sedmak, Aleksandar
AU  - Sedmak, S
PY  - 2002
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/309
AB  - For the description of the mechanical behavior of a cracked material, we use a macromechanical model of fracture based on the well-known criterion of plastic yield for porous materials. This model is realized as a computational scheme with the help of the finite-element method. The critical values of the micromechanical parameters of damage are experimentally measured and numerically evaluated for smooth specimens with an aim to predict the onset of plastic yield in a compact cracked specimen. For a low-alloy pressure-vessel steel considered as an example, we show that the proposed micromechanical model can be used for the prediction of the onset of fracture processes in both smooth and compact specimens.
PB  - Springer, New York
T2  - Materials Science
T1  - Analysis of the transferability of micromechanical parameters of damage of steel under the conditions of ductile-fracture initiation
EP  - 113
IS  - 1
SP  - 104
VL  - 38
DO  - 10.1023/A:1020185001499
ER  - 

@article{
author = "Rakin, Marko and Cvijović, Z and Sedmak, Aleksandar and Sedmak, S",
year = "2002",
abstract = "For the description of the mechanical behavior of a cracked material, we use a macromechanical model of fracture based on the well-known criterion of plastic yield for porous materials. This model is realized as a computational scheme with the help of the finite-element method. The critical values of the micromechanical parameters of damage are experimentally measured and numerically evaluated for smooth specimens with an aim to predict the onset of plastic yield in a compact cracked specimen. For a low-alloy pressure-vessel steel considered as an example, we show that the proposed micromechanical model can be used for the prediction of the onset of fracture processes in both smooth and compact specimens.",
publisher = "Springer, New York",
journal = "Materials Science",
title = "Analysis of the transferability of micromechanical parameters of damage of steel under the conditions of ductile-fracture initiation",
pages = "113-104",
number = "1",
volume = "38",
doi = "10.1023/A:1020185001499"
}

Rakin, M., Cvijović, Z., Sedmak, A.,& Sedmak, S.. (2002). Analysis of the transferability of micromechanical parameters of damage of steel under the conditions of ductile-fracture initiation. in Materials Science
Springer, New York., 38(1), 104-113.
https://doi.org/10.1023/A:1020185001499

Rakin M, Cvijović Z, Sedmak A, Sedmak S. Analysis of the transferability of micromechanical parameters of damage of steel under the conditions of ductile-fracture initiation. in Materials Science. 2002;38(1):104-113.
doi:10.1023/A:1020185001499 .

Rakin, Marko, Cvijović, Z, Sedmak, Aleksandar, Sedmak, S, "Analysis of the transferability of micromechanical parameters of damage of steel under the conditions of ductile-fracture initiation" in Materials Science, 38, no. 1 (2002):104-113,
https://doi.org/10.1023/A:1020185001499 . .