TY  - JOUR
AU  - Sedmak, Aleksandar
AU  - Grbović, Aleksandar
AU  - Zaidi, Radzeya
AU  - Kirin, Snežana
AU  - Vitas, Nikola
AU  - Golubović, Tamara
AU  - Vučetić, Ivana
PY  - 2023
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/7154
AB  - Numerical and analytical methods are applied to determine the remaining life of oil rig pipe with an axial crack.
Analytical expressions for surface cracks are used to calculate stress intensity factors for different crack geometries
and estimate the remaining life directly by using Paris law.
The same procedure is applied by using the FEM, verified
previously by experimental results. Good agreement between
analytical and numerical results is demonstrated.
AB  - Primenjene su numeričke i analitičke metode za određivanje preostalog veka cevi naftne platforme sa aksijalnom
prslinom. Analitički izrazi za površinske prsline korišćeni
su za izračunavanje faktora intenziteta napona za različite
geometrije prsline i za procenu preostalog veka korišćenjem Parisovog zakona. Isti postupak je primenjen korišćenjem MKE, prethodno verifikovan eksperimentom. Pokazano je dobro slaganje analitičkih i numeričkih rezultata.
PB  - Society for Structural Integrity and Life (DIVK)
T2  - Structural Integrity and Life
T1  - NUMERICAL, ANALYTICAL AND EXPERIMENTAL DETERMINATION OF REMAINING LIFE OF A PIPE WITH AN AXIAL CRACK
T1  - NUMERIČKO, ANALITIČKO I EKSPERIMENTALNO ODREĐIVANJE PREOSTALOG VEKA CEVI SA OSNOM PRSLINOM
EP  - 244
IS  - 3
SP  - 239
VL  - 23
UR  - https://hdl.handle.net/21.15107/rcub_technorep_7154
ER  - 

@article{
author = "Sedmak, Aleksandar and Grbović, Aleksandar and Zaidi, Radzeya and Kirin, Snežana and Vitas, Nikola and Golubović, Tamara and Vučetić, Ivana",
year = "2023",
abstract = "Numerical and analytical methods are applied to determine the remaining life of oil rig pipe with an axial crack.
Analytical expressions for surface cracks are used to calculate stress intensity factors for different crack geometries
and estimate the remaining life directly by using Paris law.
The same procedure is applied by using the FEM, verified
previously by experimental results. Good agreement between
analytical and numerical results is demonstrated., Primenjene su numeričke i analitičke metode za određivanje preostalog veka cevi naftne platforme sa aksijalnom
prslinom. Analitički izrazi za površinske prsline korišćeni
su za izračunavanje faktora intenziteta napona za različite
geometrije prsline i za procenu preostalog veka korišćenjem Parisovog zakona. Isti postupak je primenjen korišćenjem MKE, prethodno verifikovan eksperimentom. Pokazano je dobro slaganje analitičkih i numeričkih rezultata.",
publisher = "Society for Structural Integrity and Life (DIVK)",
journal = "Structural Integrity and Life",
title = "NUMERICAL, ANALYTICAL AND EXPERIMENTAL DETERMINATION OF REMAINING LIFE OF A PIPE WITH AN AXIAL CRACK, NUMERIČKO, ANALITIČKO I EKSPERIMENTALNO ODREĐIVANJE PREOSTALOG VEKA CEVI SA OSNOM PRSLINOM",
pages = "244-239",
number = "3",
volume = "23",
url = "https://hdl.handle.net/21.15107/rcub_technorep_7154"
}

Sedmak, A., Grbović, A., Zaidi, R., Kirin, S., Vitas, N., Golubović, T.,& Vučetić, I.. (2023). NUMERICAL, ANALYTICAL AND EXPERIMENTAL DETERMINATION OF REMAINING LIFE OF A PIPE WITH AN AXIAL CRACK. in Structural Integrity and Life
Society for Structural Integrity and Life (DIVK)., 23(3), 239-244.
https://hdl.handle.net/21.15107/rcub_technorep_7154

Sedmak A, Grbović A, Zaidi R, Kirin S, Vitas N, Golubović T, Vučetić I. NUMERICAL, ANALYTICAL AND EXPERIMENTAL DETERMINATION OF REMAINING LIFE OF A PIPE WITH AN AXIAL CRACK. in Structural Integrity and Life. 2023;23(3):239-244.
https://hdl.handle.net/21.15107/rcub_technorep_7154 .

Sedmak, Aleksandar, Grbović, Aleksandar, Zaidi, Radzeya, Kirin, Snežana, Vitas, Nikola, Golubović, Tamara, Vučetić, Ivana, "NUMERICAL, ANALYTICAL AND EXPERIMENTAL DETERMINATION OF REMAINING LIFE OF A PIPE WITH AN AXIAL CRACK" in Structural Integrity and Life, 23, no. 3 (2023):239-244,
https://hdl.handle.net/21.15107/rcub_technorep_7154 .

TY  - CONF
AU  - Zečević, Bojana
AU  - Maksimović, Ana
AU  - Milović, Ljubica
AU  - Aleksić, Vujadin
AU  - Grbović, Aleksandar
AU  - Bulatović, Srđan
PY  - 2022
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/6423
AB  - Steel grade 14MoV6 3 is used for manufacturing of boilers and steam pipelines designed for steam temperatures up to 560 °C. This paper presents the numerical simulation of a CT-specimen, using the finite element method. The analysis was performed using Ansys Workbench R21, and represents the initial stage of extensive research involving the behaviour of 14MoV6 3 steel. The goal was to simulate the real experimental conditions, including boundary conditions and loads, which were defined in accordance with relevant standards, and to obtain representative results. The temperature dependent mechanical properties needed for the simulation of plastic behaviour of such specimens under tensile loads were obtained from the experimental data and the literature.
PB  - Elsevier B.V.
C3  - 23rd European Conference on Fracture, ECF 2022, Procedia Structural Integrity
T1  - Numerical simulation of 14Mov6-3 steel CT-specimen Fracture Behavior
EP  - 1496
SP  - 1483
VL  - 42
DO  - 10.1016/j.prostr.2022.12.189
ER  - 

@conference{
author = "Zečević, Bojana and Maksimović, Ana and Milović, Ljubica and Aleksić, Vujadin and Grbović, Aleksandar and Bulatović, Srđan",
year = "2022",
abstract = "Steel grade 14MoV6 3 is used for manufacturing of boilers and steam pipelines designed for steam temperatures up to 560 °C. This paper presents the numerical simulation of a CT-specimen, using the finite element method. The analysis was performed using Ansys Workbench R21, and represents the initial stage of extensive research involving the behaviour of 14MoV6 3 steel. The goal was to simulate the real experimental conditions, including boundary conditions and loads, which were defined in accordance with relevant standards, and to obtain representative results. The temperature dependent mechanical properties needed for the simulation of plastic behaviour of such specimens under tensile loads were obtained from the experimental data and the literature.",
publisher = "Elsevier B.V.",
journal = "23rd European Conference on Fracture, ECF 2022, Procedia Structural Integrity",
title = "Numerical simulation of 14Mov6-3 steel CT-specimen Fracture Behavior",
pages = "1496-1483",
volume = "42",
doi = "10.1016/j.prostr.2022.12.189"
}

Zečević, B., Maksimović, A., Milović, L., Aleksić, V., Grbović, A.,& Bulatović, S.. (2022). Numerical simulation of 14Mov6-3 steel CT-specimen Fracture Behavior. in 23rd European Conference on Fracture, ECF 2022, Procedia Structural Integrity
Elsevier B.V.., 42, 1483-1496.
https://doi.org/10.1016/j.prostr.2022.12.189

Zečević B, Maksimović A, Milović L, Aleksić V, Grbović A, Bulatović S. Numerical simulation of 14Mov6-3 steel CT-specimen Fracture Behavior. in 23rd European Conference on Fracture, ECF 2022, Procedia Structural Integrity. 2022;42:1483-1496.
doi:10.1016/j.prostr.2022.12.189 .

Zečević, Bojana, Maksimović, Ana, Milović, Ljubica, Aleksić, Vujadin, Grbović, Aleksandar, Bulatović, Srđan, "Numerical simulation of 14Mov6-3 steel CT-specimen Fracture Behavior" in 23rd European Conference on Fracture, ECF 2022, Procedia Structural Integrity, 42 (2022):1483-1496,
https://doi.org/10.1016/j.prostr.2022.12.189 . .

TY  - JOUR
AU  - Hemer, Abubkr
AU  - Milović, Ljubica
AU  - Grbović, Aleksandar
AU  - Aleksić, Bojana
AU  - Aleksić, Vujadin
PY  - 2020
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/4353
AB  - Most of the serious weldment failures lead to catastrophic consequences in terms of damage of other equipment, loss of production, and risks to workers' health and safety. Hence, there is motivation to find margin between safety and disaster. This necessitates guaranteeing the integrity of a welded structure even if a crack is present. Therefore, influence of the material inhomogeneity and residual stresses on deformation and fracture behavior needs to be described precisely. Fracture mechanics parameters J - integral and CTOD have attracted great interest in recent years. Two three point bending specimens of base metal (BM) and weld metal (WM) were tested according to standard BS EN ISO 15653. Than, a two dimensional finite element analysis was performed in Ansys Workbench software to calculate J-integral, and compare with experimental results. The aim of this work is to explore the possibility of using the test results in the reliable prediction of weldment fracture.
PB  - Pergamon-Elsevier Science Ltd, Oxford
T2  - Engineering Failure Analysis
T1  - Numerical determination and experimental validation of the fracture toughness of welded joints
VL  - 107
DO  - 10.1016/j.engfailanal.2019.104220
ER  - 

@article{
author = "Hemer, Abubkr and Milović, Ljubica and Grbović, Aleksandar and Aleksić, Bojana and Aleksić, Vujadin",
year = "2020",
abstract = "Most of the serious weldment failures lead to catastrophic consequences in terms of damage of other equipment, loss of production, and risks to workers' health and safety. Hence, there is motivation to find margin between safety and disaster. This necessitates guaranteeing the integrity of a welded structure even if a crack is present. Therefore, influence of the material inhomogeneity and residual stresses on deformation and fracture behavior needs to be described precisely. Fracture mechanics parameters J - integral and CTOD have attracted great interest in recent years. Two three point bending specimens of base metal (BM) and weld metal (WM) were tested according to standard BS EN ISO 15653. Than, a two dimensional finite element analysis was performed in Ansys Workbench software to calculate J-integral, and compare with experimental results. The aim of this work is to explore the possibility of using the test results in the reliable prediction of weldment fracture.",
publisher = "Pergamon-Elsevier Science Ltd, Oxford",
journal = "Engineering Failure Analysis",
title = "Numerical determination and experimental validation of the fracture toughness of welded joints",
volume = "107",
doi = "10.1016/j.engfailanal.2019.104220"
}

Hemer, A., Milović, L., Grbović, A., Aleksić, B.,& Aleksić, V.. (2020). Numerical determination and experimental validation of the fracture toughness of welded joints. in Engineering Failure Analysis
Pergamon-Elsevier Science Ltd, Oxford., 107.
https://doi.org/10.1016/j.engfailanal.2019.104220

Hemer A, Milović L, Grbović A, Aleksić B, Aleksić V. Numerical determination and experimental validation of the fracture toughness of welded joints. in Engineering Failure Analysis. 2020;107.
doi:10.1016/j.engfailanal.2019.104220 .

Hemer, Abubkr, Milović, Ljubica, Grbović, Aleksandar, Aleksić, Bojana, Aleksić, Vujadin, "Numerical determination and experimental validation of the fracture toughness of welded joints" in Engineering Failure Analysis, 107 (2020),
https://doi.org/10.1016/j.engfailanal.2019.104220 . .

TY  - JOUR
AU  - Aleksić, Bojana
AU  - Grbović, Aleksandar
AU  - Milović, Ljubica
AU  - Hemer, Abubkr
AU  - Aleksić, Vujadin
PY  - 2019
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/4141
AB  - In order to prevent the premature failure of steam pipeline produced of molybdenum-vanadium steel, the experimental tests were performed to measure fracture toughness and to determine the mechanical behaviour of cracked pipes. A finite element method was used to calculate the fracture behaviour of the pressurized pipeline made of 14MoV6-3 steel based on the J-integral computation. The J-R curves were experimentally obtained by the elastic unloading compliance method for the single edge notched bend specimens and compared with those obtained using finite element method. A two dimensional finite element analysis was performed in Ansys Workbench software to determine the stress distribution and calculate J-integral values for the selected specimen geometry. Special attention was paid to the influence of applied boundary conditions on the accuracy of J-integral values, as well as to the influence of mesh density. It is shown that numerically obtained J-values significantly depend on the number of nodes used to apply displacements. However, if recommendations proposed in this paper are implemented, the accuracy of calculated values is satisfactory and successful failure analysis can be carried out. This approach can be useful in engineering applications where time saving and costs reducing are required.
PB  - Pergamon-Elsevier Science Ltd, Oxford
T2  - Engineering Failure Analysis
T1  - Numerical simulation of fatigue crack propagation: A case study of defected steam pipeline
SP  - 104165
VL  - 106
DO  - 10.1016/j.engfailanal.2019.104165
ER  - 

@article{
author = "Aleksić, Bojana and Grbović, Aleksandar and Milović, Ljubica and Hemer, Abubkr and Aleksić, Vujadin",
year = "2019",
abstract = "In order to prevent the premature failure of steam pipeline produced of molybdenum-vanadium steel, the experimental tests were performed to measure fracture toughness and to determine the mechanical behaviour of cracked pipes. A finite element method was used to calculate the fracture behaviour of the pressurized pipeline made of 14MoV6-3 steel based on the J-integral computation. The J-R curves were experimentally obtained by the elastic unloading compliance method for the single edge notched bend specimens and compared with those obtained using finite element method. A two dimensional finite element analysis was performed in Ansys Workbench software to determine the stress distribution and calculate J-integral values for the selected specimen geometry. Special attention was paid to the influence of applied boundary conditions on the accuracy of J-integral values, as well as to the influence of mesh density. It is shown that numerically obtained J-values significantly depend on the number of nodes used to apply displacements. However, if recommendations proposed in this paper are implemented, the accuracy of calculated values is satisfactory and successful failure analysis can be carried out. This approach can be useful in engineering applications where time saving and costs reducing are required.",
publisher = "Pergamon-Elsevier Science Ltd, Oxford",
journal = "Engineering Failure Analysis",
title = "Numerical simulation of fatigue crack propagation: A case study of defected steam pipeline",
pages = "104165",
volume = "106",
doi = "10.1016/j.engfailanal.2019.104165"
}

Aleksić, B., Grbović, A., Milović, L., Hemer, A.,& Aleksić, V.. (2019). Numerical simulation of fatigue crack propagation: A case study of defected steam pipeline. in Engineering Failure Analysis
Pergamon-Elsevier Science Ltd, Oxford., 106, 104165.
https://doi.org/10.1016/j.engfailanal.2019.104165

Aleksić B, Grbović A, Milović L, Hemer A, Aleksić V. Numerical simulation of fatigue crack propagation: A case study of defected steam pipeline. in Engineering Failure Analysis. 2019;106:104165.
doi:10.1016/j.engfailanal.2019.104165 .

Aleksić, Bojana, Grbović, Aleksandar, Milović, Ljubica, Hemer, Abubkr, Aleksić, Vujadin, "Numerical simulation of fatigue crack propagation: A case study of defected steam pipeline" in Engineering Failure Analysis, 106 (2019):104165,
https://doi.org/10.1016/j.engfailanal.2019.104165 . .

TY  - JOUR
AU  - Aleksić, Bojana
AU  - Grbović, Aleksandar
AU  - Milović, Ljubica
AU  - Hemer, Abubkr
AU  - Aleksić, Vujadin
PY  - 2019
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/5034
AB  - In order to prevent the premature failure of steam pipeline produced of molybdenum-vanadium steel, the experimental tests were performed to measure fracture toughness and to determine the mechanical behaviour of cracked pipes. A finite element method was used to calculate the fracture behaviour of the pressurized pipeline made of 14MoV6-3 steel based on the J-integral computation. The J-R curves were experimentally obtained by the elastic unloading compliance method for the single edge notched bend specimens and compared with those obtained using finite element method. A two dimensional finite element analysis was performed in Ansys Workbench software to determine the stress distribution and calculate J-integral values for the selected specimen geometry. Special attention was paid to the influence of applied boundary conditions on the accuracy of J-integral values, as well as to the influence of mesh density. It is shown that numerically obtained J-values significantly depend on the number of nodes used to apply displacements. However, if recommendations proposed in this paper are implemented, the accuracy of calculated values is satisfactory and successful failure analysis can be carried out. This approach can be useful in engineering applications where time saving and costs reducing are required.
PB  - Elsevier Ltd
T2  - Engineering Failure Analysis
T1  - Numerical simulation of fatigue crack propagation: A case study of defected steam pipeline
SP  - 104165
VL  - 106
DO  - 10.1016/j.engfailanal.2019.104165
ER  - 

@article{
author = "Aleksić, Bojana and Grbović, Aleksandar and Milović, Ljubica and Hemer, Abubkr and Aleksić, Vujadin",
year = "2019",
abstract = "In order to prevent the premature failure of steam pipeline produced of molybdenum-vanadium steel, the experimental tests were performed to measure fracture toughness and to determine the mechanical behaviour of cracked pipes. A finite element method was used to calculate the fracture behaviour of the pressurized pipeline made of 14MoV6-3 steel based on the J-integral computation. The J-R curves were experimentally obtained by the elastic unloading compliance method for the single edge notched bend specimens and compared with those obtained using finite element method. A two dimensional finite element analysis was performed in Ansys Workbench software to determine the stress distribution and calculate J-integral values for the selected specimen geometry. Special attention was paid to the influence of applied boundary conditions on the accuracy of J-integral values, as well as to the influence of mesh density. It is shown that numerically obtained J-values significantly depend on the number of nodes used to apply displacements. However, if recommendations proposed in this paper are implemented, the accuracy of calculated values is satisfactory and successful failure analysis can be carried out. This approach can be useful in engineering applications where time saving and costs reducing are required.",
publisher = "Elsevier Ltd",
journal = "Engineering Failure Analysis",
title = "Numerical simulation of fatigue crack propagation: A case study of defected steam pipeline",
pages = "104165",
volume = "106",
doi = "10.1016/j.engfailanal.2019.104165"
}

Aleksić, B., Grbović, A., Milović, L., Hemer, A.,& Aleksić, V.. (2019). Numerical simulation of fatigue crack propagation: A case study of defected steam pipeline. in Engineering Failure Analysis
Elsevier Ltd., 106, 104165.
https://doi.org/10.1016/j.engfailanal.2019.104165

Aleksić B, Grbović A, Milović L, Hemer A, Aleksić V. Numerical simulation of fatigue crack propagation: A case study of defected steam pipeline. in Engineering Failure Analysis. 2019;106:104165.
doi:10.1016/j.engfailanal.2019.104165 .

Aleksić, Bojana, Grbović, Aleksandar, Milović, Ljubica, Hemer, Abubkr, Aleksić, Vujadin, "Numerical simulation of fatigue crack propagation: A case study of defected steam pipeline" in Engineering Failure Analysis, 106 (2019):104165,
https://doi.org/10.1016/j.engfailanal.2019.104165 . .

TY  - JOUR
AU  - Aleksić, Bojana
AU  - Milović, Ljubica
AU  - Grbović, Aleksandar
AU  - Hemer, Abubkr
AU  - Aleksić, Vujadin
AU  - Zrilić, Milorad
PY  - 2018
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/3783
AB  - Steel grade 14MoV6-3 is a low-carbon microalloyed steel with addition of chromium and molybdenum. This grade is designed mainly for power industry applications, withstanding operating at elevated temperatures.In this paper, mechanical properties of steel grade 14MoV6-3 and methodology of calculation of critical values of the J-integral are presented. The level of damage is determined by analyzing the virgin material of the same grade. The focus of presented investigation is on the experimental J integral determination, where critical values of the J-integral (J(IC)) are compared with the values obtained by using the finite element methods (FEM). FEM model was defined on the basis of experimental conditions and obtained numerical values should confirm our experimental results.
PB  - Elsevier Science Bv, Amsterdam
T2  - ECF22 - Loading and Environmental Effects on Structural Integrity
T1  - Experimental and numerical investigations of the critical values of J-integral for the steel of steam pipelines
EP  - 1594
SP  - 1589
VL  - 13
DO  - 10.1016/j.prostr.2018.12.335
ER  - 

@article{
author = "Aleksić, Bojana and Milović, Ljubica and Grbović, Aleksandar and Hemer, Abubkr and Aleksić, Vujadin and Zrilić, Milorad",
year = "2018",
abstract = "Steel grade 14MoV6-3 is a low-carbon microalloyed steel with addition of chromium and molybdenum. This grade is designed mainly for power industry applications, withstanding operating at elevated temperatures.In this paper, mechanical properties of steel grade 14MoV6-3 and methodology of calculation of critical values of the J-integral are presented. The level of damage is determined by analyzing the virgin material of the same grade. The focus of presented investigation is on the experimental J integral determination, where critical values of the J-integral (J(IC)) are compared with the values obtained by using the finite element methods (FEM). FEM model was defined on the basis of experimental conditions and obtained numerical values should confirm our experimental results.",
publisher = "Elsevier Science Bv, Amsterdam",
journal = "ECF22 - Loading and Environmental Effects on Structural Integrity",
title = "Experimental and numerical investigations of the critical values of J-integral for the steel of steam pipelines",
pages = "1594-1589",
volume = "13",
doi = "10.1016/j.prostr.2018.12.335"
}

Aleksić, B., Milović, L., Grbović, A., Hemer, A., Aleksić, V.,& Zrilić, M.. (2018). Experimental and numerical investigations of the critical values of J-integral for the steel of steam pipelines. in ECF22 - Loading and Environmental Effects on Structural Integrity
Elsevier Science Bv, Amsterdam., 13, 1589-1594.
https://doi.org/10.1016/j.prostr.2018.12.335

Aleksić B, Milović L, Grbović A, Hemer A, Aleksić V, Zrilić M. Experimental and numerical investigations of the critical values of J-integral for the steel of steam pipelines. in ECF22 - Loading and Environmental Effects on Structural Integrity. 2018;13:1589-1594.
doi:10.1016/j.prostr.2018.12.335 .

Aleksić, Bojana, Milović, Ljubica, Grbović, Aleksandar, Hemer, Abubkr, Aleksić, Vujadin, Zrilić, Milorad, "Experimental and numerical investigations of the critical values of J-integral for the steel of steam pipelines" in ECF22 - Loading and Environmental Effects on Structural Integrity, 13 (2018):1589-1594,
https://doi.org/10.1016/j.prostr.2018.12.335 . .

TY  - JOUR
AU  - Đurđević, Andrijana
AU  - Zivojinović, Danijela
AU  - Grbović, Aleksandar
AU  - Sedmak, Aleksandar
AU  - Rakin, Marko
AU  - Dascau, Horia
AU  - Kirin, Snežana
PY  - 2015
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/3056
AB  - In this work, fatigue crack propagation in thin-walled aluminium alloy structure with two friction stir welded T joints has been simulated numerically. Crack propagation in stiffened part of the structure between two friction stir welded T joints is analysed by using the eXtended Finite Element Method (XFEM), including software ABAQUS, as well as MORFEO, for modelling and results display. Tensile fatigue loading is applied, with stress ratio R = 0, and maximum stress sigma(max) = 10 MPa. Material properties (Al 2024-T351, as used in aeronautical industry) in different welded joints zones are adopted from available literature data. Following results are obtained by numerical analysis: stress-strain and displacement state in the structure, position of the crack tip and value of stress intensity factor for every crack propagation step, as well as the structural life estimation, i.e. number of load cycles, N, also for each crack propagation step. Using these results the number of cycles at which the crack starts to propagate in an unstable manner is predicted.
PB  - Pergamon-Elsevier Science Ltd, Oxford
T2  - Engineering Failure Analysis
T1  - Numerical simulation of fatigue crack propagation in friction stir welded joint made of Al 2024-T351 alloy
EP  - 484
SP  - 477
VL  - 58
DO  - 10.1016/j.engfailanal.2015.08.028
ER  - 

@article{
author = "Đurđević, Andrijana and Zivojinović, Danijela and Grbović, Aleksandar and Sedmak, Aleksandar and Rakin, Marko and Dascau, Horia and Kirin, Snežana",
year = "2015",
abstract = "In this work, fatigue crack propagation in thin-walled aluminium alloy structure with two friction stir welded T joints has been simulated numerically. Crack propagation in stiffened part of the structure between two friction stir welded T joints is analysed by using the eXtended Finite Element Method (XFEM), including software ABAQUS, as well as MORFEO, for modelling and results display. Tensile fatigue loading is applied, with stress ratio R = 0, and maximum stress sigma(max) = 10 MPa. Material properties (Al 2024-T351, as used in aeronautical industry) in different welded joints zones are adopted from available literature data. Following results are obtained by numerical analysis: stress-strain and displacement state in the structure, position of the crack tip and value of stress intensity factor for every crack propagation step, as well as the structural life estimation, i.e. number of load cycles, N, also for each crack propagation step. Using these results the number of cycles at which the crack starts to propagate in an unstable manner is predicted.",
publisher = "Pergamon-Elsevier Science Ltd, Oxford",
journal = "Engineering Failure Analysis",
title = "Numerical simulation of fatigue crack propagation in friction stir welded joint made of Al 2024-T351 alloy",
pages = "484-477",
volume = "58",
doi = "10.1016/j.engfailanal.2015.08.028"
}

Đurđević, A., Zivojinović, D., Grbović, A., Sedmak, A., Rakin, M., Dascau, H.,& Kirin, S.. (2015). Numerical simulation of fatigue crack propagation in friction stir welded joint made of Al 2024-T351 alloy. in Engineering Failure Analysis
Pergamon-Elsevier Science Ltd, Oxford., 58, 477-484.
https://doi.org/10.1016/j.engfailanal.2015.08.028

Đurđević A, Zivojinović D, Grbović A, Sedmak A, Rakin M, Dascau H, Kirin S. Numerical simulation of fatigue crack propagation in friction stir welded joint made of Al 2024-T351 alloy. in Engineering Failure Analysis. 2015;58:477-484.
doi:10.1016/j.engfailanal.2015.08.028 .

Đurđević, Andrijana, Zivojinović, Danijela, Grbović, Aleksandar, Sedmak, Aleksandar, Rakin, Marko, Dascau, Horia, Kirin, Snežana, "Numerical simulation of fatigue crack propagation in friction stir welded joint made of Al 2024-T351 alloy" in Engineering Failure Analysis, 58 (2015):477-484,
https://doi.org/10.1016/j.engfailanal.2015.08.028 . .

TY  - JOUR
AU  - Zivojinović, Danijela
AU  - Đurđević, Andrijana
AU  - Grbović, Aleksandar
AU  - Sedmak, Aleksandar
AU  - Rakin, Marko
PY  - 2014
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/2802
AB  - In this work, fatigue crack propagation in thin-walled aluminium alloy structure with two friction stir welded (FSW) joints has been numerically modelled. Crack propagation in unstiffened part of the structure between two FSW joints is analyzed. Numerical method, so-called eXtended Finite Element Method (XFEM) has been used, including software Abaqus, as well as Morfeo, for modelling and results display. Tensile fatigue loading is applied, with stress ratio R=0. The analyzed model is made from aluminium alloy 2024-T351. Material properties in joints zones and geometry measures of FSW joint are adopted from available experiments. Following results are obtained by numerical analysis: stress-displacement state in the structure, where special attention is dedicated to the crack tip zone, coordinates of the crack front (x, y, z) for every propagation step, distributions of stress intensity factors - K-I, K-II, K-III and K-eq along the crack front for each propagation step, structural life in form of change of applied number of load cycles, N, for each step of propagation. Besides numerical results, Abaqus provides visualization of crack propagation in the structure. On the basis of obtained data, analysis of crack growth stability is done.
PB  - Elsevier Science Bv, Amsterdam
T2  - 20th European Conference on Fracture
T1  - Numerical modelling of crack propagation in friction stir welded joint made of aluminium alloy
EP  - 1335
SP  - 1330
VL  - 3
DO  - 10.1016/j.mspro.2014.06.215
ER  - 

@article{
author = "Zivojinović, Danijela and Đurđević, Andrijana and Grbović, Aleksandar and Sedmak, Aleksandar and Rakin, Marko",
year = "2014",
abstract = "In this work, fatigue crack propagation in thin-walled aluminium alloy structure with two friction stir welded (FSW) joints has been numerically modelled. Crack propagation in unstiffened part of the structure between two FSW joints is analyzed. Numerical method, so-called eXtended Finite Element Method (XFEM) has been used, including software Abaqus, as well as Morfeo, for modelling and results display. Tensile fatigue loading is applied, with stress ratio R=0. The analyzed model is made from aluminium alloy 2024-T351. Material properties in joints zones and geometry measures of FSW joint are adopted from available experiments. Following results are obtained by numerical analysis: stress-displacement state in the structure, where special attention is dedicated to the crack tip zone, coordinates of the crack front (x, y, z) for every propagation step, distributions of stress intensity factors - K-I, K-II, K-III and K-eq along the crack front for each propagation step, structural life in form of change of applied number of load cycles, N, for each step of propagation. Besides numerical results, Abaqus provides visualization of crack propagation in the structure. On the basis of obtained data, analysis of crack growth stability is done.",
publisher = "Elsevier Science Bv, Amsterdam",
journal = "20th European Conference on Fracture",
title = "Numerical modelling of crack propagation in friction stir welded joint made of aluminium alloy",
pages = "1335-1330",
volume = "3",
doi = "10.1016/j.mspro.2014.06.215"
}

Zivojinović, D., Đurđević, A., Grbović, A., Sedmak, A.,& Rakin, M.. (2014). Numerical modelling of crack propagation in friction stir welded joint made of aluminium alloy. in 20th European Conference on Fracture
Elsevier Science Bv, Amsterdam., 3, 1330-1335.
https://doi.org/10.1016/j.mspro.2014.06.215

Zivojinović D, Đurđević A, Grbović A, Sedmak A, Rakin M. Numerical modelling of crack propagation in friction stir welded joint made of aluminium alloy. in 20th European Conference on Fracture. 2014;3:1330-1335.
doi:10.1016/j.mspro.2014.06.215 .

Zivojinović, Danijela, Đurđević, Andrijana, Grbović, Aleksandar, Sedmak, Aleksandar, Rakin, Marko, "Numerical modelling of crack propagation in friction stir welded joint made of aluminium alloy" in 20th European Conference on Fracture, 3 (2014):1330-1335,
https://doi.org/10.1016/j.mspro.2014.06.215 . .