TY  - JOUR
AU  - Musrati, Walid
AU  - Međo, Bojan
AU  - Cvijović-Alagić, Ivana
AU  - Gubeljak, Nenad
AU  - Štefane, Primož
AU  - Radosavljević, Zoran
AU  - Rakin, Marko
PY  - 2023
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/6607
AB  - Steel pipelines in industrial plants consist of different elements, including seamless and/or welded (seam) pipes. Properties of welded pipes, including their fracture behaviour, depend on the characteristics of both, the base metal, and the weld metal. In this work, two seam pipes are considered having different diameters and manufactured of P235TR1 steel. Hardness and microstructure were examined on the samples which contained the seam zone, to capture the influence of heterogeneity. Fracture resistance of the pipeline material, i.e. of both base metals and both seams, was determined by experimental examination of the recently proposed Pipe ring notch bending specimens with sharp stress concentrators. Differences between the two tested pipes, including the influence of the heterogeneity caused by the welded joint, were determined by comparison of the crack growth resistance curves. Effects of the initial stress concentrator shape, sharp machined notch or fatigue precrack are discussed.
AB  - Čelični cevovodi u industrijskim postrojenjima se sastoje od različitih elemenata, uključujući bešavne i/ili
zavarene (šavne) cevi. Osobine šavnih cevi, uključujući ponašanje materijala cevi pri lomu, zavise i od
osnovnog metala i od metala šava. U ovom radu razmatrane su dve šavne cevi različitih prečnika,
izrađene od čelika P235TR1. Tvrdoća i mikrostruktura su analizirane na uzorcima isečenim iz cevi u zoni
šava, da bi se odredio uticaj heterogenosti. Otpornost prema lomu materijala cevovoda, tj. oba osnovna
metala i oba šava, je određena na osnovu ispitivanja epruveta oblika prstena sa oštrim koncentratorima
napona, predloženih u prethodnim studijama. Poređenjem krivih otpornosti prema rastu prsline
određene su razlike između dve ispitivane cevi, kao i uticaj heterogenosti izazvan postojanjem zavarenog
spoja. Razmotren je uticaj oblika početnog koncentratora napona, oštrog žleba odnosno zamorne
početne prsline.
PB  - Association of the Chemical Engineers of Serbia
T2  - Hemijska industrija
T1  - Microstructure, hardness and fracture resistance of P235TR1 seam steel pipes of different diameters
T1  - Otpornost prema lomu, tvrdoća i mikrostruktura šavnih cevi različitog prečnika izrađenih od čelika P235TR1
EP  - 165
IS  - 2
SP  - 155
VL  - 77
DO  - 10.2298/HEMIND230222016M
ER  - 

@article{
author = "Musrati, Walid and Međo, Bojan and Cvijović-Alagić, Ivana and Gubeljak, Nenad and Štefane, Primož and Radosavljević, Zoran and Rakin, Marko",
year = "2023",
abstract = "Steel pipelines in industrial plants consist of different elements, including seamless and/or welded (seam) pipes. Properties of welded pipes, including their fracture behaviour, depend on the characteristics of both, the base metal, and the weld metal. In this work, two seam pipes are considered having different diameters and manufactured of P235TR1 steel. Hardness and microstructure were examined on the samples which contained the seam zone, to capture the influence of heterogeneity. Fracture resistance of the pipeline material, i.e. of both base metals and both seams, was determined by experimental examination of the recently proposed Pipe ring notch bending specimens with sharp stress concentrators. Differences between the two tested pipes, including the influence of the heterogeneity caused by the welded joint, were determined by comparison of the crack growth resistance curves. Effects of the initial stress concentrator shape, sharp machined notch or fatigue precrack are discussed., Čelični cevovodi u industrijskim postrojenjima se sastoje od različitih elemenata, uključujući bešavne i/ili
zavarene (šavne) cevi. Osobine šavnih cevi, uključujući ponašanje materijala cevi pri lomu, zavise i od
osnovnog metala i od metala šava. U ovom radu razmatrane su dve šavne cevi različitih prečnika,
izrađene od čelika P235TR1. Tvrdoća i mikrostruktura su analizirane na uzorcima isečenim iz cevi u zoni
šava, da bi se odredio uticaj heterogenosti. Otpornost prema lomu materijala cevovoda, tj. oba osnovna
metala i oba šava, je određena na osnovu ispitivanja epruveta oblika prstena sa oštrim koncentratorima
napona, predloženih u prethodnim studijama. Poređenjem krivih otpornosti prema rastu prsline
određene su razlike između dve ispitivane cevi, kao i uticaj heterogenosti izazvan postojanjem zavarenog
spoja. Razmotren je uticaj oblika početnog koncentratora napona, oštrog žleba odnosno zamorne
početne prsline.",
publisher = "Association of the Chemical Engineers of Serbia",
journal = "Hemijska industrija",
title = "Microstructure, hardness and fracture resistance of P235TR1 seam steel pipes of different diameters, Otpornost prema lomu, tvrdoća i mikrostruktura šavnih cevi različitog prečnika izrađenih od čelika P235TR1",
pages = "165-155",
number = "2",
volume = "77",
doi = "10.2298/HEMIND230222016M"
}

Musrati, W., Međo, B., Cvijović-Alagić, I., Gubeljak, N., Štefane, P., Radosavljević, Z.,& Rakin, M.. (2023). Microstructure, hardness and fracture resistance of P235TR1 seam steel pipes of different diameters. in Hemijska industrija
Association of the Chemical Engineers of Serbia., 77(2), 155-165.
https://doi.org/10.2298/HEMIND230222016M

Musrati W, Međo B, Cvijović-Alagić I, Gubeljak N, Štefane P, Radosavljević Z, Rakin M. Microstructure, hardness and fracture resistance of P235TR1 seam steel pipes of different diameters. in Hemijska industrija. 2023;77(2):155-165.
doi:10.2298/HEMIND230222016M .

Musrati, Walid, Međo, Bojan, Cvijović-Alagić, Ivana, Gubeljak, Nenad, Štefane, Primož, Radosavljević, Zoran, Rakin, Marko, "Microstructure, hardness and fracture resistance of P235TR1 seam steel pipes of different diameters" in Hemijska industrija, 77, no. 2 (2023):155-165,
https://doi.org/10.2298/HEMIND230222016M . .

TY  - CONF
AU  - Međo, Bojan
AU  - Rakin, Marko
AU  - Gubeljak, Nenad
PY  - 2019
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/6176
AB  - Welding is one of the most often applied joining procedures for different metallic
structures. Due to the nature of the process, i.e. heating, additional material (for some
methods), usage of protective atmosphere and cooling, it typically causes inhomogeneity in
the joint zone. This inhomogeneity influences the fracture behaviour, and can significantly
endanger the integrity of the welded structures. This work deals with micromechanical
criteria for initiation and development of ductile fracture in welded joints. These criteria are
applied within the framework of local approach to fracture, through experimental-numerical
procedure. Welded joints with a single weld metal or two different weld metals are
examined; the influence of constraint and heterogeneity (mismatch) is analysed. Also, the
defects in the heat affected zone are considered, as well as pipeline materials with sharp and
blunt initial defects. Micromechanical model CGM, complete Gurson model, is used for
modelling the damage initiation and development in the material.
PB  - Srpsko drustvo za mehaniku
C3  - International Congress of Serbian Society of Mechanics
T1  - Micromechanical criteria of steel weldments ductile fracture
EP  - 91
SP  - 74
UR  - https://hdl.handle.net/21.15107/rcub_technorep_6176
ER  - 

@conference{
author = "Međo, Bojan and Rakin, Marko and Gubeljak, Nenad",
year = "2019",
abstract = "Welding is one of the most often applied joining procedures for different metallic
structures. Due to the nature of the process, i.e. heating, additional material (for some
methods), usage of protective atmosphere and cooling, it typically causes inhomogeneity in
the joint zone. This inhomogeneity influences the fracture behaviour, and can significantly
endanger the integrity of the welded structures. This work deals with micromechanical
criteria for initiation and development of ductile fracture in welded joints. These criteria are
applied within the framework of local approach to fracture, through experimental-numerical
procedure. Welded joints with a single weld metal or two different weld metals are
examined; the influence of constraint and heterogeneity (mismatch) is analysed. Also, the
defects in the heat affected zone are considered, as well as pipeline materials with sharp and
blunt initial defects. Micromechanical model CGM, complete Gurson model, is used for
modelling the damage initiation and development in the material.",
publisher = "Srpsko drustvo za mehaniku",
journal = "International Congress of Serbian Society of Mechanics",
title = "Micromechanical criteria of steel weldments ductile fracture",
pages = "91-74",
url = "https://hdl.handle.net/21.15107/rcub_technorep_6176"
}

Međo, B., Rakin, M.,& Gubeljak, N.. (2019). Micromechanical criteria of steel weldments ductile fracture. in International Congress of Serbian Society of Mechanics
Srpsko drustvo za mehaniku., 74-91.
https://hdl.handle.net/21.15107/rcub_technorep_6176

Međo B, Rakin M, Gubeljak N. Micromechanical criteria of steel weldments ductile fracture. in International Congress of Serbian Society of Mechanics. 2019;:74-91.
https://hdl.handle.net/21.15107/rcub_technorep_6176 .

Međo, Bojan, Rakin, Marko, Gubeljak, Nenad, "Micromechanical criteria of steel weldments ductile fracture" in International Congress of Serbian Society of Mechanics (2019):74-91,
https://hdl.handle.net/21.15107/rcub_technorep_6176 .

TY  - CONF
AU  - Međo, Bojan
AU  - Musrati, Walid
AU  - Arsić, Miodrag
AU  - Gubeljak, Nenad
AU  - Štefane, Primož
AU  - Rakin, Marko
PY  - 2018
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/6295
PB  - Savez mašinskih i elektrotehničkih inženjera i tehničara Srbije
C3  - Međunarodni kongres o procesnoj industriji - Procesing
T1  - Određivanje otpornosti prema lomu materijala cevovoda primenom epruveta oblika prstena
EP  - 40
SP  - 35
UR  - https://hdl.handle.net/21.15107/rcub_technorep_6295
ER  - 

@conference{
author = "Međo, Bojan and Musrati, Walid and Arsić, Miodrag and Gubeljak, Nenad and Štefane, Primož and Rakin, Marko",
year = "2018",
publisher = "Savez mašinskih i elektrotehničkih inženjera i tehničara Srbije",
journal = "Međunarodni kongres o procesnoj industriji - Procesing",
title = "Određivanje otpornosti prema lomu materijala cevovoda primenom epruveta oblika prstena",
pages = "40-35",
url = "https://hdl.handle.net/21.15107/rcub_technorep_6295"
}

Međo, B., Musrati, W., Arsić, M., Gubeljak, N., Štefane, P.,& Rakin, M.. (2018). Određivanje otpornosti prema lomu materijala cevovoda primenom epruveta oblika prstena. in Međunarodni kongres o procesnoj industriji - Procesing
Savez mašinskih i elektrotehničkih inženjera i tehničara Srbije., 35-40.
https://hdl.handle.net/21.15107/rcub_technorep_6295

Međo B, Musrati W, Arsić M, Gubeljak N, Štefane P, Rakin M. Određivanje otpornosti prema lomu materijala cevovoda primenom epruveta oblika prstena. in Međunarodni kongres o procesnoj industriji - Procesing. 2018;:35-40.
https://hdl.handle.net/21.15107/rcub_technorep_6295 .

Međo, Bojan, Musrati, Walid, Arsić, Miodrag, Gubeljak, Nenad, Štefane, Primož, Rakin, Marko, "Određivanje otpornosti prema lomu materijala cevovoda primenom epruveta oblika prstena" in Međunarodni kongres o procesnoj industriji - Procesing (2018):35-40,
https://hdl.handle.net/21.15107/rcub_technorep_6295 .

TY  - JOUR
AU  - Čolić, Katarina
AU  - Gubeljak, Nenad
AU  - Burzić, Meri
AU  - Sedmak, Aleksandar
AU  - Mijatović, Tamara
AU  - Milovanović, Aleksa
PY  - 2017
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/5814
AB  - In this paper are presented experimental analyses of the behaviour of 316L stainless steel in regard to fracture, according to standard methods of investigation on modified tensile C(T) specimens. The S316L alloy is selected for this experimental analysis, often used in many engineering applications. This alloy is not prone to corrosion as other austenitic steels with a higher share of carbon. Results show that material behaviour, in terms of dependence of stress intensity factor (SIF) value relative to thickness of the plate, is necessary to assume with a different model when the specimen thickness is very small. Application of standards in the field of investigation of material resistance to fracture allow simultaneous determination and connection of several fracture mechanics parameters.
PB  - Institut za ispitivanje materijala, Beograd
T2  - Structural Integrity and Life
T1  - Analysis of fracture behaviour of thin s316l stainless steel plates
EP  - 216
IS  - 3
SP  - 211
VL  - 17
UR  - https://hdl.handle.net/21.15107/rcub_machinery_2732
ER  - 

@article{
author = "Čolić, Katarina and Gubeljak, Nenad and Burzić, Meri and Sedmak, Aleksandar and Mijatović, Tamara and Milovanović, Aleksa",
year = "2017",
abstract = "In this paper are presented experimental analyses of the behaviour of 316L stainless steel in regard to fracture, according to standard methods of investigation on modified tensile C(T) specimens. The S316L alloy is selected for this experimental analysis, often used in many engineering applications. This alloy is not prone to corrosion as other austenitic steels with a higher share of carbon. Results show that material behaviour, in terms of dependence of stress intensity factor (SIF) value relative to thickness of the plate, is necessary to assume with a different model when the specimen thickness is very small. Application of standards in the field of investigation of material resistance to fracture allow simultaneous determination and connection of several fracture mechanics parameters.",
publisher = "Institut za ispitivanje materijala, Beograd",
journal = "Structural Integrity and Life",
title = "Analysis of fracture behaviour of thin s316l stainless steel plates",
pages = "216-211",
number = "3",
volume = "17",
url = "https://hdl.handle.net/21.15107/rcub_machinery_2732"
}

Čolić, K., Gubeljak, N., Burzić, M., Sedmak, A., Mijatović, T.,& Milovanović, A.. (2017). Analysis of fracture behaviour of thin s316l stainless steel plates. in Structural Integrity and Life
Institut za ispitivanje materijala, Beograd., 17(3), 211-216.
https://hdl.handle.net/21.15107/rcub_machinery_2732

Čolić K, Gubeljak N, Burzić M, Sedmak A, Mijatović T, Milovanović A. Analysis of fracture behaviour of thin s316l stainless steel plates. in Structural Integrity and Life. 2017;17(3):211-216.
https://hdl.handle.net/21.15107/rcub_machinery_2732 .

Čolić, Katarina, Gubeljak, Nenad, Burzić, Meri, Sedmak, Aleksandar, Mijatović, Tamara, Milovanović, Aleksa, "Analysis of fracture behaviour of thin s316l stainless steel plates" in Structural Integrity and Life, 17, no. 3 (2017):211-216,
https://hdl.handle.net/21.15107/rcub_machinery_2732 .

TY  - JOUR
AU  - Rakin, Marko
AU  - Gubeljak, Nenad
AU  - Dobrojević, M.
AU  - Sedmak, Aleksandar
PY  - 2008
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/5569
AB  - In this paper, the effect of strength mismatch and width of the welded joints oil the stress-strain distribution in the crack tip region has been discussed. The single-edge notched bend (SENB) specimens (precrack length a(0)/W= 0.32) were experimentally and numerically analysed. The model of local approach to fracture, proposed by Gurson, Tvergaard and Needleman, was used. High-strength low-alloyed (HSLA) steel was used as a base metal in quenched and tempered condition. The flux-cored arc-welding process in shielding gas was used. Two different fillers were selected to make over- and undermatched weld metal. The experimental analysis of fracture behaviour of the over- and undermatched welded joints was followed by numerical computations of void volume fraction in front of the crack tip. The critical void volume fraction, f(c), used in prediction of the crack growth initiation on the SENB specimen had been previously determined on a round smooth specimen. Three widths of weld metal were considered: 6,12 and 18 mm. A comparison of the crack tip opening displacement (CTOD) values corresponding to crack initiation in the SENB specimens is given, as determined both experimentally and using the GTN model.
PB  - Pergamon-Elsevier Science Ltd, Oxford
T2  - Engineering Fracture Mechanics
T1  - Modelling of ductile fracture initiation in strength mismatched welded joint
EP  - 3510
IS  - 11
SP  - 3499
VL  - 75
DO  - 10.1016/j.engfracmech.2007.04.026
ER  - 

@article{
author = "Rakin, Marko and Gubeljak, Nenad and Dobrojević, M. and Sedmak, Aleksandar",
year = "2008",
abstract = "In this paper, the effect of strength mismatch and width of the welded joints oil the stress-strain distribution in the crack tip region has been discussed. The single-edge notched bend (SENB) specimens (precrack length a(0)/W= 0.32) were experimentally and numerically analysed. The model of local approach to fracture, proposed by Gurson, Tvergaard and Needleman, was used. High-strength low-alloyed (HSLA) steel was used as a base metal in quenched and tempered condition. The flux-cored arc-welding process in shielding gas was used. Two different fillers were selected to make over- and undermatched weld metal. The experimental analysis of fracture behaviour of the over- and undermatched welded joints was followed by numerical computations of void volume fraction in front of the crack tip. The critical void volume fraction, f(c), used in prediction of the crack growth initiation on the SENB specimen had been previously determined on a round smooth specimen. Three widths of weld metal were considered: 6,12 and 18 mm. A comparison of the crack tip opening displacement (CTOD) values corresponding to crack initiation in the SENB specimens is given, as determined both experimentally and using the GTN model.",
publisher = "Pergamon-Elsevier Science Ltd, Oxford",
journal = "Engineering Fracture Mechanics",
title = "Modelling of ductile fracture initiation in strength mismatched welded joint",
pages = "3510-3499",
number = "11",
volume = "75",
doi = "10.1016/j.engfracmech.2007.04.026"
}

Rakin, M., Gubeljak, N., Dobrojević, M.,& Sedmak, A.. (2008). Modelling of ductile fracture initiation in strength mismatched welded joint. in Engineering Fracture Mechanics
Pergamon-Elsevier Science Ltd, Oxford., 75(11), 3499-3510.
https://doi.org/10.1016/j.engfracmech.2007.04.026

Rakin M, Gubeljak N, Dobrojević M, Sedmak A. Modelling of ductile fracture initiation in strength mismatched welded joint. in Engineering Fracture Mechanics. 2008;75(11):3499-3510.
doi:10.1016/j.engfracmech.2007.04.026 .

Rakin, Marko, Gubeljak, Nenad, Dobrojević, M., Sedmak, Aleksandar, "Modelling of ductile fracture initiation in strength mismatched welded joint" in Engineering Fracture Mechanics, 75, no. 11 (2008):3499-3510,
https://doi.org/10.1016/j.engfracmech.2007.04.026 . .