Hemer, Abubkr

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2909680a-1716-4bb5-af33-7ea2c42fb0ef
  • Hemer, Abubkr (8)
Projects

Author's Bibliography

Numerical determination and experimental validation of the fracture toughness of welded joints

Hemer, Abubkr; Milović, Ljubica; Grbović, Aleksandar; Aleksić, Bojana; Aleksić, Vujadin

(Pergamon-Elsevier Science Ltd, Oxford, 2020)

TY  - JOUR
AU  - Hemer, Abubkr
AU  - Milović, Ljubica
AU  - Grbović, Aleksandar
AU  - Aleksić, Bojana
AU  - Aleksić, Vujadin
PY  - 2020
UR  - http://rims.institutims.rs/handle/123456789/378
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 . .
8
1
8

Numerical simulation of fatigue crack propagation: A case study of defected steam pipeline

Aleksić, Bojana; Grbović, Aleksandar; Milović, Ljubica; Hemer, Abubkr; Aleksić, Vujadin

(Pergamon-Elsevier Science Ltd, Oxford, 2019)

TY  - JOUR
AU  - Aleksić, Bojana
AU  - Grbović, Aleksandar
AU  - Milović, Ljubica
AU  - Hemer, Abubkr
AU  - Aleksić, Vujadin
PY  - 2019
UR  - http://rims.institutims.rs/handle/123456789/370
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
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",
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.
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.
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),
https://doi.org/10.1016/j.engfailanal.2019.104165 . .
6
3
7

Evaluation of Stress Intensity Factors (SIFs) Using Extended Finite Element Method (XFEM)

Zečević, Bojana; Grbović, Aleksandar; Hemer, Abubkr; Milović, Ljubica; Aleksić, Vujadin

(Springer, 2018)

TY  - CHAP
AU  - Zečević, Bojana
AU  - Grbović, Aleksandar
AU  - Hemer, Abubkr
AU  - Milović, Ljubica
AU  - Aleksić, Vujadin
PY  - 2018
UR  - http://rims.institutims.rs/handle/123456789/776
PB  - Springer
T2  - Proceedings of the 17th International Conference on New Trends in Fatigue and Fracture
T1  - Evaluation of Stress Intensity Factors (SIFs) Using Extended Finite Element Method (XFEM)
EP  - 369
SP  - 355
UR  - https://hdl.handle.net/21.15107/rcub_rims_776
ER  - 
@inbook{
author = "Zečević, Bojana and Grbović, Aleksandar and Hemer, Abubkr and Milović, Ljubica and Aleksić, Vujadin",
year = "2018",
publisher = "Springer",
journal = "Proceedings of the 17th International Conference on New Trends in Fatigue and Fracture",
booktitle = "Evaluation of Stress Intensity Factors (SIFs) Using Extended Finite Element Method (XFEM)",
pages = "369-355",
url = "https://hdl.handle.net/21.15107/rcub_rims_776"
}
Zečević, B., Grbović, A., Hemer, A., Milović, L.,& Aleksić, V.. (2018). Evaluation of Stress Intensity Factors (SIFs) Using Extended Finite Element Method (XFEM). in Proceedings of the 17th International Conference on New Trends in Fatigue and Fracture
Springer., 355-369.
https://hdl.handle.net/21.15107/rcub_rims_776
Zečević B, Grbović A, Hemer A, Milović L, Aleksić V. Evaluation of Stress Intensity Factors (SIFs) Using Extended Finite Element Method (XFEM). in Proceedings of the 17th International Conference on New Trends in Fatigue and Fracture. 2018;:355-369.
https://hdl.handle.net/21.15107/rcub_rims_776 .
Zečević, Bojana, Grbović, Aleksandar, Hemer, Abubkr, Milović, Ljubica, Aleksić, Vujadin, "Evaluation of Stress Intensity Factors (SIFs) Using Extended Finite Element Method (XFEM)" in Proceedings of the 17th International Conference on New Trends in Fatigue and Fracture (2018):355-369,
https://hdl.handle.net/21.15107/rcub_rims_776 .

Determination of polynomial depending between hardness and cooling time t8/5 of steel NIONICRAL 70 heat affected zone

Aleksić, Bojana; Aleksić, Vujadin; Milović, Ljubica; Hemer, Abubkr; Prodanović, Ana

(2018)

TY  - CONF
AU  - Aleksić, Bojana
AU  - Aleksić, Vujadin
AU  - Milović, Ljubica
AU  - Hemer, Abubkr
AU  - Prodanović, Ana
PY  - 2018
UR  - http://rims.institutims.rs/handle/123456789/771
AB  - Because of the high heating and cooling velocity values, welding procedure is an unstable process. During
welding, changes in microstructure are occurring under overheating and/or cooling conditions. In comparing to the
parent steel (PM), throughout welding of steel alloys, a whole series of complex processes are performed which
influence to the appearance of different weldments microstructure and at the level of stresses in the weld metal
(WM) and the heat-affected zone (HAZ). In present paper, the analytic dependence between Vickers hardness (HV) values and cooling time im temperature interval from 800C to 500C (t8/5) will be determined using the test
results of experimental investigation of NIONICRAL 70 (NN-70) steel.
C3  - 18th International Conference on New Trends in Fatigue and Fracture NT2F18
T1  - Determination of polynomial depending between hardness and cooling time t8/5 of steel NIONICRAL 70 heat affected zone
EP  - 90
SP  - 87
UR  - https://hdl.handle.net/21.15107/rcub_rims_771
ER  - 
@conference{
author = "Aleksić, Bojana and Aleksić, Vujadin and Milović, Ljubica and Hemer, Abubkr and Prodanović, Ana",
year = "2018",
abstract = "Because of the high heating and cooling velocity values, welding procedure is an unstable process. During
welding, changes in microstructure are occurring under overheating and/or cooling conditions. In comparing to the
parent steel (PM), throughout welding of steel alloys, a whole series of complex processes are performed which
influence to the appearance of different weldments microstructure and at the level of stresses in the weld metal
(WM) and the heat-affected zone (HAZ). In present paper, the analytic dependence between Vickers hardness (HV) values and cooling time im temperature interval from 800C to 500C (t8/5) will be determined using the test
results of experimental investigation of NIONICRAL 70 (NN-70) steel.",
journal = "18th International Conference on New Trends in Fatigue and Fracture NT2F18",
title = "Determination of polynomial depending between hardness and cooling time t8/5 of steel NIONICRAL 70 heat affected zone",
pages = "90-87",
url = "https://hdl.handle.net/21.15107/rcub_rims_771"
}
Aleksić, B., Aleksić, V., Milović, L., Hemer, A.,& Prodanović, A.. (2018). Determination of polynomial depending between hardness and cooling time t8/5 of steel NIONICRAL 70 heat affected zone. in 18th International Conference on New Trends in Fatigue and Fracture NT2F18, 87-90.
https://hdl.handle.net/21.15107/rcub_rims_771
Aleksić B, Aleksić V, Milović L, Hemer A, Prodanović A. Determination of polynomial depending between hardness and cooling time t8/5 of steel NIONICRAL 70 heat affected zone. in 18th International Conference on New Trends in Fatigue and Fracture NT2F18. 2018;:87-90.
https://hdl.handle.net/21.15107/rcub_rims_771 .
Aleksić, Bojana, Aleksić, Vujadin, Milović, Ljubica, Hemer, Abubkr, Prodanović, Ana, "Determination of polynomial depending between hardness and cooling time t8/5 of steel NIONICRAL 70 heat affected zone" in 18th International Conference on New Trends in Fatigue and Fracture NT2F18 (2018):87-90,
https://hdl.handle.net/21.15107/rcub_rims_771 .

Experimental and numerical investigations of the critical values of J-integral for the steel of steam pipelines

Aleksić, Bojana; Milović, Ljubica; Grbović, Aleksandar; Hemer, Abubkr; Aleksić, Vujadin; Zrilić, Milorad

(Elsevier Science Bv, Amsterdam, 2018)

TY  - CONF
AU  - Aleksić, Bojana
AU  - Milović, Ljubica
AU  - Grbović, Aleksandar
AU  - Hemer, Abubkr
AU  - Aleksić, Vujadin
AU  - Zrilić, Milorad
PY  - 2018
UR  - http://rims.institutims.rs/handle/123456789/349
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
C3  - 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  - 
@conference{
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 . .
2
1

Behaviour of nionikral-70 in low-cycle fatigue

Aleksić, Vujadin; Milović, Ljubica; Aleksić, Bojana; Bulatović, Srđan; Burzić, Zijah; Hemer, Abubkr

(Institut za ispitivanje materijala, Beograd, 2017)

TY  - JOUR
AU  - Aleksić, Vujadin
AU  - Milović, Ljubica
AU  - Aleksić, Bojana
AU  - Bulatović, Srđan
AU  - Burzić, Zijah
AU  - Hemer, Abubkr
PY  - 2017
UR  - http://rims.institutims.rs/handle/123456789/308
AB  - Experimental research on the behaviour of high-strength low-alloy steel ( HSLA)exposed to low-cycle fatigue (LCF) with controlled and fully reversible strain (Delta epsilon/2 = const, R epsilon =epsilon(min)/epsilon(max) = -1) has been analysed. LCF tests are performed on a series of smooth bar shaped specimens, 11 x 11 x 95 mm, parent metal (PM), welded joint (WJ) and simulated heat affected zone (SHAZ) of steel Nionikral 70 (NN-70) with semi-amplitude of controlled strain, Delta epsilon/2 = 0.40- 0.80. The results of the experimental investigation have given us important information on the understanding of fatigue behaviour of steel NN-70 and its welded joints. In this work the results of static and dynamic-, that is monotonous and fatigue behaviour of the material, are compared, which is a practical contribution to the assessment of the behaviour of PM and WJ of steel NN-70 exposed to effects of low cycle fatigue, i.e. monotonous and fatigue behaviour of the material.
PB  - Institut za ispitivanje materijala, Beograd
T2  - Structural Integrity and Life
T1  - Behaviour of nionikral-70 in low-cycle fatigue
EP  - 73
IS  - 1
SP  - 61
VL  - 17
UR  - https://hdl.handle.net/21.15107/rcub_technorep_3495
ER  - 
@article{
author = "Aleksić, Vujadin and Milović, Ljubica and Aleksić, Bojana and Bulatović, Srđan and Burzić, Zijah and Hemer, Abubkr",
year = "2017",
abstract = "Experimental research on the behaviour of high-strength low-alloy steel ( HSLA)exposed to low-cycle fatigue (LCF) with controlled and fully reversible strain (Delta epsilon/2 = const, R epsilon =epsilon(min)/epsilon(max) = -1) has been analysed. LCF tests are performed on a series of smooth bar shaped specimens, 11 x 11 x 95 mm, parent metal (PM), welded joint (WJ) and simulated heat affected zone (SHAZ) of steel Nionikral 70 (NN-70) with semi-amplitude of controlled strain, Delta epsilon/2 = 0.40- 0.80. The results of the experimental investigation have given us important information on the understanding of fatigue behaviour of steel NN-70 and its welded joints. In this work the results of static and dynamic-, that is monotonous and fatigue behaviour of the material, are compared, which is a practical contribution to the assessment of the behaviour of PM and WJ of steel NN-70 exposed to effects of low cycle fatigue, i.e. monotonous and fatigue behaviour of the material.",
publisher = "Institut za ispitivanje materijala, Beograd",
journal = "Structural Integrity and Life",
title = "Behaviour of nionikral-70 in low-cycle fatigue",
pages = "73-61",
number = "1",
volume = "17",
url = "https://hdl.handle.net/21.15107/rcub_technorep_3495"
}
Aleksić, V., Milović, L., Aleksić, B., Bulatović, S., Burzić, Z.,& Hemer, A.. (2017). Behaviour of nionikral-70 in low-cycle fatigue. in Structural Integrity and Life
Institut za ispitivanje materijala, Beograd., 17(1), 61-73.
https://hdl.handle.net/21.15107/rcub_technorep_3495
Aleksić V, Milović L, Aleksić B, Bulatović S, Burzić Z, Hemer A. Behaviour of nionikral-70 in low-cycle fatigue. in Structural Integrity and Life. 2017;17(1):61-73.
https://hdl.handle.net/21.15107/rcub_technorep_3495 .
Aleksić, Vujadin, Milović, Ljubica, Aleksić, Bojana, Bulatović, Srđan, Burzić, Zijah, Hemer, Abubkr, "Behaviour of nionikral-70 in low-cycle fatigue" in Structural Integrity and Life, 17, no. 1 (2017):61-73,
https://hdl.handle.net/21.15107/rcub_technorep_3495 .
1
5

Behaviour of 9% Cr steel and simulated HAZ at 600°C

Milović, Ljubica; Aleksić, Bojana; Hemer, Abubkr; Aleksić, Vujadin

(2016)

TY  - CONF
AU  - Milović, Ljubica
AU  - Aleksić, Bojana
AU  - Hemer, Abubkr
AU  - Aleksić, Vujadin
PY  - 2016
UR  - http://rims.institutims.rs/handle/123456789/793
C3  - FRACT3, Chlef, Algeria
T1  - Behaviour of 9% Cr steel and simulated HAZ at 600°C
EP  - 39
SP  - 39
UR  - https://hdl.handle.net/21.15107/rcub_rims_793
ER  - 
@conference{
author = "Milović, Ljubica and Aleksić, Bojana and Hemer, Abubkr and Aleksić, Vujadin",
year = "2016",
journal = "FRACT3, Chlef, Algeria",
title = "Behaviour of 9% Cr steel and simulated HAZ at 600°C",
pages = "39-39",
url = "https://hdl.handle.net/21.15107/rcub_rims_793"
}
Milović, L., Aleksić, B., Hemer, A.,& Aleksić, V.. (2016). Behaviour of 9% Cr steel and simulated HAZ at 600°C. in FRACT3, Chlef, Algeria, 39-39.
https://hdl.handle.net/21.15107/rcub_rims_793
Milović L, Aleksić B, Hemer A, Aleksić V. Behaviour of 9% Cr steel and simulated HAZ at 600°C. in FRACT3, Chlef, Algeria. 2016;:39-39.
https://hdl.handle.net/21.15107/rcub_rims_793 .
Milović, Ljubica, Aleksić, Bojana, Hemer, Abubkr, Aleksić, Vujadin, "Behaviour of 9% Cr steel and simulated HAZ at 600°C" in FRACT3, Chlef, Algeria (2016):39-39,
https://hdl.handle.net/21.15107/rcub_rims_793 .

Indicators of HSLA steel behavior under low cycle fatigue loading

Aleksić, Vujadin; Milović, Ljubica; Aleksić, Bojana; Hemer, Abubkr

(Elsevier Science Bv, Amsterdam, 2016)

TY  - CONF
AU  - Aleksić, Vujadin
AU  - Milović, Ljubica
AU  - Aleksić, Bojana
AU  - Hemer, Abubkr
PY  - 2016
UR  - http://rims.institutims.rs/handle/123456789/287
AB  - In present paper, the experimental research of the behaviour of high-strength low-alloy steel (HSLA) exposed to low-cycle fatigue (LCF) with controlled and fully reversible strain (Delta epsilon/2 = const, R epsilon = epsilon(min)/epsilon(max) = -1) has been analysed. Low-cycle fatigue tests were performed on a series of smooth specimens made of steel Nionikral 70 (NN-70), with semi-amplitude of controlled strain, Delta epsilon/2=0.35, 0.45, 0.50, 0.60, 0.70 and 0.80. Characterization and description of the low-cycle elastoplastic behaviour of the material by construction of characteristic curves of low-cycle fatigue are made using the characteristic hysteresis, load-strain force for each level of controlled strain, selected from the areas of stabilization. For the selection of stabilized hysteresis and processing of the results of low-cycle fatigue tests the recommendations of the ISO 12106:2003 (E) and ASTM E 606-04 standards were used, which in this work means to compare the two results. For each strain level characteristic stabilized hysteresis were selected, determined in accordance with recommendations of the ISO 12106:2003 (E) and ASTM E 606-04 standards, from which the data necessary for further processing of the results and finally for the construction of characteristic curves of low cycle fatigue were read. Constructed curves are compared, and the effect of selection of the recommendations from the standards on characterization of the behaviour of steel NN-70 estimated. The results of experimental investigation have given us important information on the understanding of fatigue behaviour of steel NN-70. In this work the results of static and dynamic, that is monotonous and fatigue behaviour of the material, were compared, which is a practical contribution to the assessment of the behaviour of steel NN-70 exposed to the effects of low-cycle fatigue, i.e. monotonous and fatigue behaviour of the material.
PB  - Elsevier Science Bv, Amsterdam
C3  - 21st European Conference on Fracture, (ECF21)
T1  - Indicators of HSLA steel behavior under low cycle fatigue loading
EP  - 3321
SP  - 3313
VL  - 2
DO  - 10.1016/j.prostr.2016.06.413
ER  - 
@conference{
author = "Aleksić, Vujadin and Milović, Ljubica and Aleksić, Bojana and Hemer, Abubkr",
year = "2016",
abstract = "In present paper, the experimental research of the behaviour of high-strength low-alloy steel (HSLA) exposed to low-cycle fatigue (LCF) with controlled and fully reversible strain (Delta epsilon/2 = const, R epsilon = epsilon(min)/epsilon(max) = -1) has been analysed. Low-cycle fatigue tests were performed on a series of smooth specimens made of steel Nionikral 70 (NN-70), with semi-amplitude of controlled strain, Delta epsilon/2=0.35, 0.45, 0.50, 0.60, 0.70 and 0.80. Characterization and description of the low-cycle elastoplastic behaviour of the material by construction of characteristic curves of low-cycle fatigue are made using the characteristic hysteresis, load-strain force for each level of controlled strain, selected from the areas of stabilization. For the selection of stabilized hysteresis and processing of the results of low-cycle fatigue tests the recommendations of the ISO 12106:2003 (E) and ASTM E 606-04 standards were used, which in this work means to compare the two results. For each strain level characteristic stabilized hysteresis were selected, determined in accordance with recommendations of the ISO 12106:2003 (E) and ASTM E 606-04 standards, from which the data necessary for further processing of the results and finally for the construction of characteristic curves of low cycle fatigue were read. Constructed curves are compared, and the effect of selection of the recommendations from the standards on characterization of the behaviour of steel NN-70 estimated. The results of experimental investigation have given us important information on the understanding of fatigue behaviour of steel NN-70. In this work the results of static and dynamic, that is monotonous and fatigue behaviour of the material, were compared, which is a practical contribution to the assessment of the behaviour of steel NN-70 exposed to the effects of low-cycle fatigue, i.e. monotonous and fatigue behaviour of the material.",
publisher = "Elsevier Science Bv, Amsterdam",
journal = "21st European Conference on Fracture, (ECF21)",
title = "Indicators of HSLA steel behavior under low cycle fatigue loading",
pages = "3321-3313",
volume = "2",
doi = "10.1016/j.prostr.2016.06.413"
}
Aleksić, V., Milović, L., Aleksić, B.,& Hemer, A.. (2016). Indicators of HSLA steel behavior under low cycle fatigue loading. in 21st European Conference on Fracture, (ECF21)
Elsevier Science Bv, Amsterdam., 2, 3313-3321.
https://doi.org/10.1016/j.prostr.2016.06.413
Aleksić V, Milović L, Aleksić B, Hemer A. Indicators of HSLA steel behavior under low cycle fatigue loading. in 21st European Conference on Fracture, (ECF21). 2016;2:3313-3321.
doi:10.1016/j.prostr.2016.06.413 .
Aleksić, Vujadin, Milović, Ljubica, Aleksić, Bojana, Hemer, Abubkr, "Indicators of HSLA steel behavior under low cycle fatigue loading" in 21st European Conference on Fracture, (ECF21), 2 (2016):3313-3321,
https://doi.org/10.1016/j.prostr.2016.06.413 . .
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