Maksimović, A., Milović, L., Zečević, B., Aleksić, V.,& Bekrić, D.. (2024-06). Determination of the ductile-to-brittle transition temperature of NIOMOL 490 K steel welded joints. in Theoretical and Applied Fracture Mechanics
Elsevier B.V.., 131, 104404.
https://doi.org/10.1016/j.tafmec.2024.104404

Maksimović A, Milović L, Zečević B, Aleksić V, Bekrić D. Determination of the ductile-to-brittle transition temperature of NIOMOL 490 K steel welded joints. in Theoretical and Applied Fracture Mechanics. 2024;131:104404.
doi:10.1016/j.tafmec.2024.104404 .

Maksimović, Ana, Milović, Ljubica, Zečević, Bojana, Aleksić, Vujadin, Bekrić, Dragoljub, "Determination of the ductile-to-brittle transition temperature of NIOMOL 490 K steel welded joints" in Theoretical and Applied Fracture Mechanics, 131 (2024-06):104404,
https://doi.org/10.1016/j.tafmec.2024.104404 . .

TY  - CONF
AU  - Maksimović, Ana
AU  - Petrovski, Blagoj
AU  - Milović, Ljubica
AU  - Zečević, Bojana
AU  - Aleksić, Vujadin
AU  - Bulatović, Srđan
AU  - Bekrić, Dragoljub
PY  - 2023
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/6625
AB  - Most serious weldment failures have catastrophic consequences in terms of damage to other equipment, loss of production, and risks to worker health and safety. For the above reasons, there is a tendency to find the line between safety and disaster, and this requires a guarantee of the integrity of the welded structure even if a crack is present. The structural and mechanical heterogeneity of a welded joint affects its resistance to cracking in both the elastic and plastic regions. Therefore, it is important to define the test method and the position of the fatigue crack. The behavior of an elasto-plastic material, during stable crack growth can be described by the J-Δa diagram. As the crack propagates, a point on the curve is defined, which represents the critical value of the J-integral. The aim of this experiment is to determine JIC value and the procedure is reflected in the determination of the R-curve, i.e., the J‒Δa curve, which consists of the value of the J-integral for uniform crack increments Δa. In this paper, precracked SEN(B) specimens with the fatigue crack positioned in the weld metal (WM) were tested according to standard ASTM E1820 at room temperature (RT), -20 0C and -30 0C.
PB  - Elsevier B.V.
C3  - Procedia Structural Integrity
T1  - Experimental Determination of JIc for a HSLA Steel Welded Joint
EP  - 194
SP  - 190
VL  - 48
DO  - 10.1016/j.prostr.2023.07.147
ER  - 

@conference{
author = "Maksimović, Ana and Petrovski, Blagoj and Milović, Ljubica and Zečević, Bojana and Aleksić, Vujadin and Bulatović, Srđan and Bekrić, Dragoljub",
year = "2023",
abstract = "Most serious weldment failures have catastrophic consequences in terms of damage to other equipment, loss of production, and risks to worker health and safety. For the above reasons, there is a tendency to find the line between safety and disaster, and this requires a guarantee of the integrity of the welded structure even if a crack is present. The structural and mechanical heterogeneity of a welded joint affects its resistance to cracking in both the elastic and plastic regions. Therefore, it is important to define the test method and the position of the fatigue crack. The behavior of an elasto-plastic material, during stable crack growth can be described by the J-Δa diagram. As the crack propagates, a point on the curve is defined, which represents the critical value of the J-integral. The aim of this experiment is to determine JIC value and the procedure is reflected in the determination of the R-curve, i.e., the J‒Δa curve, which consists of the value of the J-integral for uniform crack increments Δa. In this paper, precracked SEN(B) specimens with the fatigue crack positioned in the weld metal (WM) were tested according to standard ASTM E1820 at room temperature (RT), -20 0C and -30 0C.",
publisher = "Elsevier B.V.",
journal = "Procedia Structural Integrity",
title = "Experimental Determination of JIc for a HSLA Steel Welded Joint",
pages = "194-190",
volume = "48",
doi = "10.1016/j.prostr.2023.07.147"
}

Maksimović, A., Petrovski, B., Milović, L., Zečević, B., Aleksić, V., Bulatović, S.,& Bekrić, D.. (2023). Experimental Determination of JIc for a HSLA Steel Welded Joint. in Procedia Structural Integrity
Elsevier B.V.., 48, 190-194.
https://doi.org/10.1016/j.prostr.2023.07.147

Maksimović A, Petrovski B, Milović L, Zečević B, Aleksić V, Bulatović S, Bekrić D. Experimental Determination of JIc for a HSLA Steel Welded Joint. in Procedia Structural Integrity. 2023;48:190-194.
doi:10.1016/j.prostr.2023.07.147 .

Maksimović, Ana, Petrovski, Blagoj, Milović, Ljubica, Zečević, Bojana, Aleksić, Vujadin, Bulatović, Srđan, Bekrić, Dragoljub, "Experimental Determination of JIc for a HSLA Steel Welded Joint" in Procedia Structural Integrity, 48 (2023):190-194,
https://doi.org/10.1016/j.prostr.2023.07.147 . .

TY  - CONF
AU  - Zečević, Bojana
AU  - Maksimović, Ana
AU  - Milović, Ljubica
AU  - Aleksić, Vujadin
AU  - Bulatović, Srđan
PY  - 2023
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/6626
AB  - The influence of temperature on the fatigue crack growth parameter, was analyzed by testing chromium-molybdenum steel of the new generation additionally alloyed with vanadium, designed for high temperatures application. The paper presents a comparison of the fatigue threshold value ΔKth and the fatigue crack growth rate da/dN of the specimens taken from the pipe made of virgin steel, tested at room (RT) and operating (HT) temperatures of 540 ◦C. The influence of the location of the notch and crack initiation, as well as the test temperature, have a decisive effect on the fatigue threshold values ΔKth of the chromium-molybdenum alloyed steel of the new generation additionally alloyed with vanadium for high temperatures application.
PB  - Elsevier B.V.
C3  - Procedia Structural Integrity
T1  - Fatigue crack growth rate of a low carbon microalloyed steel for high temperatures
EP  - 301
SP  - 296
VL  - 48
DO  - 10.1016/j.prostr.2023.07.129
ER  - 

@conference{
author = "Zečević, Bojana and Maksimović, Ana and Milović, Ljubica and Aleksić, Vujadin and Bulatović, Srđan",
year = "2023",
abstract = "The influence of temperature on the fatigue crack growth parameter, was analyzed by testing chromium-molybdenum steel of the new generation additionally alloyed with vanadium, designed for high temperatures application. The paper presents a comparison of the fatigue threshold value ΔKth and the fatigue crack growth rate da/dN of the specimens taken from the pipe made of virgin steel, tested at room (RT) and operating (HT) temperatures of 540 ◦C. The influence of the location of the notch and crack initiation, as well as the test temperature, have a decisive effect on the fatigue threshold values ΔKth of the chromium-molybdenum alloyed steel of the new generation additionally alloyed with vanadium for high temperatures application.",
publisher = "Elsevier B.V.",
journal = "Procedia Structural Integrity",
title = "Fatigue crack growth rate of a low carbon microalloyed steel for high temperatures",
pages = "301-296",
volume = "48",
doi = "10.1016/j.prostr.2023.07.129"
}

Zečević, B., Maksimović, A., Milović, L., Aleksić, V.,& Bulatović, S.. (2023). Fatigue crack growth rate of a low carbon microalloyed steel for high temperatures. in Procedia Structural Integrity
Elsevier B.V.., 48, 296-301.
https://doi.org/10.1016/j.prostr.2023.07.129

Zečević B, Maksimović A, Milović L, Aleksić V, Bulatović S. Fatigue crack growth rate of a low carbon microalloyed steel for high temperatures. in Procedia Structural Integrity. 2023;48:296-301.
doi:10.1016/j.prostr.2023.07.129 .

Zečević, Bojana, Maksimović, Ana, Milović, Ljubica, Aleksić, Vujadin, Bulatović, Srđan, "Fatigue crack growth rate of a low carbon microalloyed steel for high temperatures" in Procedia Structural Integrity, 48 (2023):296-301,
https://doi.org/10.1016/j.prostr.2023.07.129 . .

TY  - JOUR
AU  - Smoljanić, Tamara
AU  - Milovanović, Aleksa
AU  - Sedmak, Simon
AU  - Milović, Ljubica
AU  - Sedmak, Aleksandar
PY  - 2023
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/7039
AB  - This paper presents development of numerical models for simulation of the behaviour of titanium alloy hip implants under static and dynamic loads, which is a part of extensive research involving the structural integrity of such implants under various loading conditions, as well as under exposure to aggressive environments. Numerical models were created in ABAQUS and ANSYS software packages, in order to determine the stress/strain distribution, the number of cycles to failure and stress intensity factors, for two different hip implant geometries. The ABAQUS models were used for static and ANSYS models for dynamic loads. The next stage in this analysis involved comparing these two cases, to determine the one with the better behaviour, depending on the exploitation conditions, which can greatly vary between different groups of patients. The targeted patient weight for all numerical simulations was 90 kg, while failure assessment diagrams were made for both implant geometries, assuming a crack length of 1 mm.
AB  - U ovom radu je prikazan razvoj numeričkih modela za simulaciju implantata za zamenu zgloba kuka pod
statičkim i dinamičkim opterećenjima, kao deo širokog istraživanja koje uključuje procenu integriteta
implantata kuka u različitim uslovima, kao što su zamor i korozija. Numerički modeli su napravljeni u
ABAQUS i ANSYS softverskim paketima, u cilju procene distribucije napon/deformacija i broja ciklusa do
loma, kao i vrednosti faktora intenziteta napona za dve različite geometrije implanta kuka. ABAQUS
modeli su korišćeni za simulaciju pod statičkim, a ANSYS modeli za simulaciju pod dinamičkim
opterećenjima. Sledeća etapa analize uključuje poređenje ova dva slučaja, kako bi se odredilo koja od
ove dve geometrije pruža bolje ponašanje u eksploatacionim uslovima, a koje mogu značajno varirati
zavisno od pacijenta. Simulacije su vršene za pacijenta mase 90 kg. Za ovu svrhu, dijagrami procene rizika
su napravljeni za obe navedene geometrije, pod pretpostavkom da je dužina inicijalne prsline 1 mm.
PB  - Savez hemijskih inženjera Srbije
T2  - Hemijska industrija
T1  - Numerical simulation of titanium alloy hip replacement implants behaviour under static and dynamic loads
T1  - Numerička simulacija implantata kuka od legure titanijuma pod
statičkim i dinamičkim opterećenjima
EP  - 292
IS  - 4
SP  - 283
VL  - 77
DO  - 10.2298/HEMIND221118026S
ER  - 

@article{
author = "Smoljanić, Tamara and Milovanović, Aleksa and Sedmak, Simon and Milović, Ljubica and Sedmak, Aleksandar",
year = "2023",
abstract = "This paper presents development of numerical models for simulation of the behaviour of titanium alloy hip implants under static and dynamic loads, which is a part of extensive research involving the structural integrity of such implants under various loading conditions, as well as under exposure to aggressive environments. Numerical models were created in ABAQUS and ANSYS software packages, in order to determine the stress/strain distribution, the number of cycles to failure and stress intensity factors, for two different hip implant geometries. The ABAQUS models were used for static and ANSYS models for dynamic loads. The next stage in this analysis involved comparing these two cases, to determine the one with the better behaviour, depending on the exploitation conditions, which can greatly vary between different groups of patients. The targeted patient weight for all numerical simulations was 90 kg, while failure assessment diagrams were made for both implant geometries, assuming a crack length of 1 mm., U ovom radu je prikazan razvoj numeričkih modela za simulaciju implantata za zamenu zgloba kuka pod
statičkim i dinamičkim opterećenjima, kao deo širokog istraživanja koje uključuje procenu integriteta
implantata kuka u različitim uslovima, kao što su zamor i korozija. Numerički modeli su napravljeni u
ABAQUS i ANSYS softverskim paketima, u cilju procene distribucije napon/deformacija i broja ciklusa do
loma, kao i vrednosti faktora intenziteta napona za dve različite geometrije implanta kuka. ABAQUS
modeli su korišćeni za simulaciju pod statičkim, a ANSYS modeli za simulaciju pod dinamičkim
opterećenjima. Sledeća etapa analize uključuje poređenje ova dva slučaja, kako bi se odredilo koja od
ove dve geometrije pruža bolje ponašanje u eksploatacionim uslovima, a koje mogu značajno varirati
zavisno od pacijenta. Simulacije su vršene za pacijenta mase 90 kg. Za ovu svrhu, dijagrami procene rizika
su napravljeni za obe navedene geometrije, pod pretpostavkom da je dužina inicijalne prsline 1 mm.",
publisher = "Savez hemijskih inženjera Srbije",
journal = "Hemijska industrija",
title = "Numerical simulation of titanium alloy hip replacement implants behaviour under static and dynamic loads, Numerička simulacija implantata kuka od legure titanijuma pod
statičkim i dinamičkim opterećenjima",
pages = "292-283",
number = "4",
volume = "77",
doi = "10.2298/HEMIND221118026S"
}

Smoljanić, T., Milovanović, A., Sedmak, S., Milović, L.,& Sedmak, A.. (2023). Numerical simulation of titanium alloy hip replacement implants behaviour under static and dynamic loads. in Hemijska industrija
Savez hemijskih inženjera Srbije., 77(4), 283-292.
https://doi.org/10.2298/HEMIND221118026S

Smoljanić T, Milovanović A, Sedmak S, Milović L, Sedmak A. Numerical simulation of titanium alloy hip replacement implants behaviour under static and dynamic loads. in Hemijska industrija. 2023;77(4):283-292.
doi:10.2298/HEMIND221118026S .

Smoljanić, Tamara, Milovanović, Aleksa, Sedmak, Simon, Milović, Ljubica, Sedmak, Aleksandar, "Numerical simulation of titanium alloy hip replacement implants behaviour under static and dynamic loads" in Hemijska industrija, 77, no. 4 (2023):283-292,
https://doi.org/10.2298/HEMIND221118026S . .

TY  - JOUR
AU  - Chouaib, Zeghida
AU  - Abdelmoumene, Guedri
AU  - Amine, Belyamna Mohamed
AU  - Hadj Méliani, Mohammed
AU  - Milović, Ljubica
PY  - 2023
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/6911
AB  - This work uses computational thermomechanical model-based finite element analysis (FEA) to explore the effects of welding sequences on residual stresses that accumulate in the material and distortions of welded components, which are a direct outcome of residual stresses, the material micro-structures, material properties, and eventually the fracture toughness. The consequences of the welding process are evaluated in this study in an austenitic pipe butt weld.
AB  - U ovom radu je korišćena računarska termomehanička analiza na bazi modela konačnim elementima (FEA) kako bi se istražili uticaji sekvenci zavarivanja na zaostale napone koji se pojavljuju u materijalu, i deformacije zavarenih delova, koje su direktna posledica zaostalih napona, mikrostrukture materijala, svojstva materijala, kao i žilavosti loma. Posledice postupka zavarivanja su utvrđene u ovom radu kod spoja austenitnih cevi.
PB  - Society for Structural Integrity and Life (DIVK)
T2  - Structural Integrity and Life
T1  - TRANSIENT TEMPERATURE FIELDS EFFECTS ON MULTI-PASS WELDING IN A BUTT JOINT OF AUSTENITIC PIPING
T1  - UTICAJI PRELAZNIH TEMPERATURSKIH POLJA NA VIŠEPROLAZNO ZAVARIVANJE U SUČEONOM SPOJU AUSTENITNIH CEVI
EP  - 224
IS  - 2
SP  - 221
VL  - 23
UR  - https://hdl.handle.net/21.15107/rcub_technorep_6911
ER  - 

@article{
author = "Chouaib, Zeghida and Abdelmoumene, Guedri and Amine, Belyamna Mohamed and Hadj Méliani, Mohammed and Milović, Ljubica",
year = "2023",
abstract = "This work uses computational thermomechanical model-based finite element analysis (FEA) to explore the effects of welding sequences on residual stresses that accumulate in the material and distortions of welded components, which are a direct outcome of residual stresses, the material micro-structures, material properties, and eventually the fracture toughness. The consequences of the welding process are evaluated in this study in an austenitic pipe butt weld., U ovom radu je korišćena računarska termomehanička analiza na bazi modela konačnim elementima (FEA) kako bi se istražili uticaji sekvenci zavarivanja na zaostale napone koji se pojavljuju u materijalu, i deformacije zavarenih delova, koje su direktna posledica zaostalih napona, mikrostrukture materijala, svojstva materijala, kao i žilavosti loma. Posledice postupka zavarivanja su utvrđene u ovom radu kod spoja austenitnih cevi.",
publisher = "Society for Structural Integrity and Life (DIVK)",
journal = "Structural Integrity and Life",
title = "TRANSIENT TEMPERATURE FIELDS EFFECTS ON MULTI-PASS WELDING IN A BUTT JOINT OF AUSTENITIC PIPING, UTICAJI PRELAZNIH TEMPERATURSKIH POLJA NA VIŠEPROLAZNO ZAVARIVANJE U SUČEONOM SPOJU AUSTENITNIH CEVI",
pages = "224-221",
number = "2",
volume = "23",
url = "https://hdl.handle.net/21.15107/rcub_technorep_6911"
}

Chouaib, Z., Abdelmoumene, G., Amine, B. M., Hadj Méliani, M.,& Milović, L.. (2023). TRANSIENT TEMPERATURE FIELDS EFFECTS ON MULTI-PASS WELDING IN A BUTT JOINT OF AUSTENITIC PIPING. in Structural Integrity and Life
Society for Structural Integrity and Life (DIVK)., 23(2), 221-224.
https://hdl.handle.net/21.15107/rcub_technorep_6911

Chouaib Z, Abdelmoumene G, Amine BM, Hadj Méliani M, Milović L. TRANSIENT TEMPERATURE FIELDS EFFECTS ON MULTI-PASS WELDING IN A BUTT JOINT OF AUSTENITIC PIPING. in Structural Integrity and Life. 2023;23(2):221-224.
https://hdl.handle.net/21.15107/rcub_technorep_6911 .

Chouaib, Zeghida, Abdelmoumene, Guedri, Amine, Belyamna Mohamed, Hadj Méliani, Mohammed, Milović, Ljubica, "TRANSIENT TEMPERATURE FIELDS EFFECTS ON MULTI-PASS WELDING IN A BUTT JOINT OF AUSTENITIC PIPING" in Structural Integrity and Life, 23, no. 2 (2023):221-224,
https://hdl.handle.net/21.15107/rcub_technorep_6911 .

TY  - CONF
AU  - Smoljanić, Tamara
AU  - Sedmak, Simon
AU  - Milovanović, Aleksa
AU  - Milović, Ljubica
PY  - 2023
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/6628
AB  - One of the most important aspects of materials typically used in biomedical engineering is their resistance to various unfavourable exploitation conditions, which greatly impact their work life. In terms of extreme conditions, two major factors include fatigue and corrosion, and a combination of these can significantly decrease the expected life of various implants. The focus of this paper will be on hip implants made of Ti-Al6-4V titanium alloy, a material commonly used in such applications, due to its resistance to corrosion and bio-compatibility. Research shown here was based on experimental testing of said alloy in order to determine its mechanical properties under different working environments, including normal, salty and wet conditions. These properties were then used as input data for Extended Finite Element method (XFEM) numerical simulations of fatigue crack growth in hip implants with various geometries. This was of particular interest since specimens which were kept in salty and wet environment had a slight degradation of yield stress and tensile strength, but an increase in plasticity.
PB  - Elsevier B.V.
C3  - Procedia Structural Integrity
T1  - Numerical simulation of fatigue crack growth in Ti-Al6-V4 hip implants under different exploitation conditions
EP  - 221
SP  - 215
VL  - 48
DO  - 10.1016/j.prostr.2023.07.151
UR  - https://hdl.handle.net/21.15107/rcub_technorep_6628
ER  - 

@conference{
author = "Smoljanić, Tamara and Sedmak, Simon and Milovanović, Aleksa and Milović, Ljubica",
year = "2023",
abstract = "One of the most important aspects of materials typically used in biomedical engineering is their resistance to various unfavourable exploitation conditions, which greatly impact their work life. In terms of extreme conditions, two major factors include fatigue and corrosion, and a combination of these can significantly decrease the expected life of various implants. The focus of this paper will be on hip implants made of Ti-Al6-4V titanium alloy, a material commonly used in such applications, due to its resistance to corrosion and bio-compatibility. Research shown here was based on experimental testing of said alloy in order to determine its mechanical properties under different working environments, including normal, salty and wet conditions. These properties were then used as input data for Extended Finite Element method (XFEM) numerical simulations of fatigue crack growth in hip implants with various geometries. This was of particular interest since specimens which were kept in salty and wet environment had a slight degradation of yield stress and tensile strength, but an increase in plasticity.",
publisher = "Elsevier B.V.",
journal = "Procedia Structural Integrity",
title = "Numerical simulation of fatigue crack growth in Ti-Al6-V4 hip implants under different exploitation conditions",
pages = "221-215",
volume = "48",
doi = "10.1016/j.prostr.2023.07.151",
url = "https://hdl.handle.net/21.15107/rcub_technorep_6628"
}

Smoljanić, T., Sedmak, S., Milovanović, A.,& Milović, L.. (2023). Numerical simulation of fatigue crack growth in Ti-Al6-V4 hip implants under different exploitation conditions. in Procedia Structural Integrity
Elsevier B.V.., 48, 215-221.
https://doi.org/10.1016/j.prostr.2023.07.151
https://hdl.handle.net/21.15107/rcub_technorep_6628

Smoljanić T, Sedmak S, Milovanović A, Milović L. Numerical simulation of fatigue crack growth in Ti-Al6-V4 hip implants under different exploitation conditions. in Procedia Structural Integrity. 2023;48:215-221.
doi:10.1016/j.prostr.2023.07.151
https://hdl.handle.net/21.15107/rcub_technorep_6628 .

Smoljanić, Tamara, Sedmak, Simon, Milovanović, Aleksa, Milović, Ljubica, "Numerical simulation of fatigue crack growth in Ti-Al6-V4 hip implants under different exploitation conditions" in Procedia Structural Integrity, 48 (2023):215-221,
https://doi.org/10.1016/j.prostr.2023.07.151 .,
https://hdl.handle.net/21.15107/rcub_technorep_6628 .

TY  - JOUR
AU  - Aleksić, Vujadin
AU  - Milović, Ljubica
AU  - Zečević, Bojana
AU  - Bulatović, Srđan
PY  - 2023
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/5289
AB  - Fracture mechanics, as a scientific discipline dealing with the study of cracks in welded structures, has defined parameters and introduced new test methods in order to better determine the tendency to crack growth, critical conditions for rapid fracture development, material resistance to rapid crack propagation and better definition of other parameters for assessing the behaviour of the material and the safety of the structure in the presence of cracks. In this paper, the focus is on determination of the parameter of elastic-plastic mechanics of J-integral, more precisely, on examination of the critical value of J-integral (JIc) of the welded joint of HSLA steel. The position of the tip of the fatigue crack and the properties of the region where fracture propagation occurs are main indicators of influence of the heterogeneity of the NN-70 welded structure and mechanical properties. Resistance to cracking in the welded joint shows that the heterogeneity has a major impact on the resistance to crack initiation and propagation, in elastic as well as in the plastic region.
PB  - Strojarski Facultet
T2  - Tehnicki Vjesnik
T1  - Experimental Determination of the Critical Value of the J-Integral that Refers to the HSLA Steel Welded Joint
EP  - 152
IS  - 1
SP  - 148
VL  - 30
DO  - 10.17559/TV-20220419093052
ER  - 

@article{
author = "Aleksić, Vujadin and Milović, Ljubica and Zečević, Bojana and Bulatović, Srđan",
year = "2023",
abstract = "Fracture mechanics, as a scientific discipline dealing with the study of cracks in welded structures, has defined parameters and introduced new test methods in order to better determine the tendency to crack growth, critical conditions for rapid fracture development, material resistance to rapid crack propagation and better definition of other parameters for assessing the behaviour of the material and the safety of the structure in the presence of cracks. In this paper, the focus is on determination of the parameter of elastic-plastic mechanics of J-integral, more precisely, on examination of the critical value of J-integral (JIc) of the welded joint of HSLA steel. The position of the tip of the fatigue crack and the properties of the region where fracture propagation occurs are main indicators of influence of the heterogeneity of the NN-70 welded structure and mechanical properties. Resistance to cracking in the welded joint shows that the heterogeneity has a major impact on the resistance to crack initiation and propagation, in elastic as well as in the plastic region.",
publisher = "Strojarski Facultet",
journal = "Tehnicki Vjesnik",
title = "Experimental Determination of the Critical Value of the J-Integral that Refers to the HSLA Steel Welded Joint",
pages = "152-148",
number = "1",
volume = "30",
doi = "10.17559/TV-20220419093052"
}

Aleksić, V., Milović, L., Zečević, B.,& Bulatović, S.. (2023). Experimental Determination of the Critical Value of the J-Integral that Refers to the HSLA Steel Welded Joint. in Tehnicki Vjesnik
Strojarski Facultet., 30(1), 148-152.
https://doi.org/10.17559/TV-20220419093052

Aleksić V, Milović L, Zečević B, Bulatović S. Experimental Determination of the Critical Value of the J-Integral that Refers to the HSLA Steel Welded Joint. in Tehnicki Vjesnik. 2023;30(1):148-152.
doi:10.17559/TV-20220419093052 .

Aleksić, Vujadin, Milović, Ljubica, Zečević, Bojana, Bulatović, Srđan, "Experimental Determination of the Critical Value of the J-Integral that Refers to the HSLA Steel Welded Joint" in Tehnicki Vjesnik, 30, no. 1 (2023):148-152,
https://doi.org/10.17559/TV-20220419093052 . .

TY  - JOUR
AU  - Zečević, Bojana
AU  - Milović, Ljubica
AU  - Burzic, Z.
AU  - Maksimović, Ana
AU  - Aleksic, Vujadin
PY  - 2022
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/5000
AB  - Due to its superior strength at high temperatures P/T91 steel is often applied in the chemical, petrochemical and fossil-fired power generation industries. The high strength is achieved by a suitable martensitic microstructure after appropriate heat treatment procedure. Welding is the most important process of joining the components in such plants, and the heat-affected zone is often the weakest part of these structures. Having in mind that the welded joint is the weakest area, it is necessary to know its properties and assess the level of its degradation. It was found that the life-limiting factor in case of P/T91 steel welded structures are the cracks located in the heat affected zones, more precisely in its intercritical region. In present paper the results of the fracture toughness measurement carried out on simulated P91 steel ICHAZ specimens produced using a weld simulator has been presented. The tests were done on two types of simulated specimens, those subjected to the subsequent PWHT and with those left untreated (without PWHT), at room temperature and 600 degrees C. For the J-integral estimation pin-loaded SEN(T) specimens were tested in plane stress conditions using the unloading compliance method of deriving a single specimen resistance curve and the eta-method.
T2  - Experimental Techniques
T1  - J-integral Analysis of the Simulated Heat-affected Zone of the Elevated-temperature Martensitic Steel
DO  - 10.1007/s40799-021-00487-9
ER  - 

@article{
author = "Zečević, Bojana and Milović, Ljubica and Burzic, Z. and Maksimović, Ana and Aleksic, Vujadin",
year = "2022",
abstract = "Due to its superior strength at high temperatures P/T91 steel is often applied in the chemical, petrochemical and fossil-fired power generation industries. The high strength is achieved by a suitable martensitic microstructure after appropriate heat treatment procedure. Welding is the most important process of joining the components in such plants, and the heat-affected zone is often the weakest part of these structures. Having in mind that the welded joint is the weakest area, it is necessary to know its properties and assess the level of its degradation. It was found that the life-limiting factor in case of P/T91 steel welded structures are the cracks located in the heat affected zones, more precisely in its intercritical region. In present paper the results of the fracture toughness measurement carried out on simulated P91 steel ICHAZ specimens produced using a weld simulator has been presented. The tests were done on two types of simulated specimens, those subjected to the subsequent PWHT and with those left untreated (without PWHT), at room temperature and 600 degrees C. For the J-integral estimation pin-loaded SEN(T) specimens were tested in plane stress conditions using the unloading compliance method of deriving a single specimen resistance curve and the eta-method.",
journal = "Experimental Techniques",
title = "J-integral Analysis of the Simulated Heat-affected Zone of the Elevated-temperature Martensitic Steel",
doi = "10.1007/s40799-021-00487-9"
}

Zečević, B., Milović, L., Burzic, Z., Maksimović, A.,& Aleksic, V.. (2022). J-integral Analysis of the Simulated Heat-affected Zone of the Elevated-temperature Martensitic Steel. in Experimental Techniques.
https://doi.org/10.1007/s40799-021-00487-9

Zečević B, Milović L, Burzic Z, Maksimović A, Aleksic V. J-integral Analysis of the Simulated Heat-affected Zone of the Elevated-temperature Martensitic Steel. in Experimental Techniques. 2022;.
doi:10.1007/s40799-021-00487-9 .

Zečević, Bojana, Milović, Ljubica, Burzic, Z., Maksimović, Ana, Aleksic, Vujadin, "J-integral Analysis of the Simulated Heat-affected Zone of the Elevated-temperature Martensitic Steel" in Experimental Techniques (2022),
https://doi.org/10.1007/s40799-021-00487-9 . .

TY  - CONF
AU  - Aleksić, Vujadin
AU  - Milović, Ljubica
AU  - Bulatović, Srđan
AU  - Zečević, Bojana
AU  - Maksimović, Ana
PY  - 2022
UR  - http://rims.institutims.rs/handle/123456789/416
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/5126
AB  - The behavior of steel in low-cycle fatigue (LCF) is tested experimentally, in accordance with ISO 12106:2017 (E) and/or ASTM E 606-04. For this purpose, smooth specimens which are exposed to low-cycle fatigue at several levels of regulated strains and/or loads at room, elevated or reduced temperatures are used. Stress–strain response at LCF has the shape of an ideal hysteresis loop. The strain range Δε corresponds to overall loop width, while the stress range Δσ corresponds to its overall height. The paper presents a method for determining the intersection of the idealized hysteresis loop and the positive part of the strain axis in order to determine the values of elastic, Δεe/2, and plastic, Δεp/2, components of the strain amplitude to characterize the behavior of steel under low cyclic fatigue. The values of elastic and plastic components of the strain amplitude are needed to determine the characteristic curves of low-cycle fatigue, which describe the behavior of steel under the loading of low-cycle fatigue.
PB  - Springer Science and Business Media B.V.
C3  - Mechanisms and Machine Science
T1  - Determination of LCF Plastic and Elastic Strain Components of Steel
EP  - 349
SP  - 341
VL  - 109
DO  - 10.1007/978-3-030-88465-9_32
ER  - 

@conference{
author = "Aleksić, Vujadin and Milović, Ljubica and Bulatović, Srđan and Zečević, Bojana and Maksimović, Ana",
year = "2022",
abstract = "The behavior of steel in low-cycle fatigue (LCF) is tested experimentally, in accordance with ISO 12106:2017 (E) and/or ASTM E 606-04. For this purpose, smooth specimens which are exposed to low-cycle fatigue at several levels of regulated strains and/or loads at room, elevated or reduced temperatures are used. Stress–strain response at LCF has the shape of an ideal hysteresis loop. The strain range Δε corresponds to overall loop width, while the stress range Δσ corresponds to its overall height. The paper presents a method for determining the intersection of the idealized hysteresis loop and the positive part of the strain axis in order to determine the values of elastic, Δεe/2, and plastic, Δεp/2, components of the strain amplitude to characterize the behavior of steel under low cyclic fatigue. The values of elastic and plastic components of the strain amplitude are needed to determine the characteristic curves of low-cycle fatigue, which describe the behavior of steel under the loading of low-cycle fatigue.",
publisher = "Springer Science and Business Media B.V.",
journal = "Mechanisms and Machine Science",
title = "Determination of LCF Plastic and Elastic Strain Components of Steel",
pages = "349-341",
volume = "109",
doi = "10.1007/978-3-030-88465-9_32"
}

Aleksić, V., Milović, L., Bulatović, S., Zečević, B.,& Maksimović, A.. (2022). Determination of LCF Plastic and Elastic Strain Components of Steel. in Mechanisms and Machine Science
Springer Science and Business Media B.V.., 109, 341-349.
https://doi.org/10.1007/978-3-030-88465-9_32

Aleksić V, Milović L, Bulatović S, Zečević B, Maksimović A. Determination of LCF Plastic and Elastic Strain Components of Steel. in Mechanisms and Machine Science. 2022;109:341-349.
doi:10.1007/978-3-030-88465-9_32 .

Aleksić, Vujadin, Milović, Ljubica, Bulatović, Srđan, Zečević, Bojana, Maksimović, Ana, "Determination of LCF Plastic and Elastic Strain Components of Steel" in Mechanisms and Machine Science, 109 (2022):341-349,
https://doi.org/10.1007/978-3-030-88465-9_32 . .

TY  - JOUR
AU  - Aleksić, Vujadin
AU  - Bulatović, Srđan
AU  - Zečević, Bojana
AU  - Maksimović, Ana
AU  - Milović, Ljubica
PY  - 2022
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/5290
AB  - The design of mechanical components exposed to fatigue load, at a low number of cycles, requires knowledge of the behaviour of the material under the impact of variable load in conditions of controlled strain when cyclic plasticity is present. The aim of testing the quality of the material of the components exposed to low cycle fatigue (LCF) in many industries: Nuclear, aerospace, mechanical, civil engineering and shipbuilding. In order to ensure the reliability and consistency of the results from different laboratories, it is necessary to collect all test data using test and data processing methodologies that are in accordance with a number of key points of ISO 12106: 2017 and/or ASTM E 606-04 standards. This paper defines a new data processing methodology after the LCF testing of steel.
PB  - University of Zagreb Faculty of Mechanical Engineering and Naval Architecture
T2  - Transactions of Famena
T1  - Processing of Data Obtained by the Testing of Steel under Low Cyclic Fatigue (Part I)
EP  - 72
IS  - 4
SP  - 59
VL  - 46
DO  - 10.21278/TOF.464041622
ER  - 

@article{
author = "Aleksić, Vujadin and Bulatović, Srđan and Zečević, Bojana and Maksimović, Ana and Milović, Ljubica",
year = "2022",
abstract = "The design of mechanical components exposed to fatigue load, at a low number of cycles, requires knowledge of the behaviour of the material under the impact of variable load in conditions of controlled strain when cyclic plasticity is present. The aim of testing the quality of the material of the components exposed to low cycle fatigue (LCF) in many industries: Nuclear, aerospace, mechanical, civil engineering and shipbuilding. In order to ensure the reliability and consistency of the results from different laboratories, it is necessary to collect all test data using test and data processing methodologies that are in accordance with a number of key points of ISO 12106: 2017 and/or ASTM E 606-04 standards. This paper defines a new data processing methodology after the LCF testing of steel.",
publisher = "University of Zagreb Faculty of Mechanical Engineering and Naval Architecture",
journal = "Transactions of Famena",
title = "Processing of Data Obtained by the Testing of Steel under Low Cyclic Fatigue (Part I)",
pages = "72-59",
number = "4",
volume = "46",
doi = "10.21278/TOF.464041622"
}

Aleksić, V., Bulatović, S., Zečević, B., Maksimović, A.,& Milović, L.. (2022). Processing of Data Obtained by the Testing of Steel under Low Cyclic Fatigue (Part I). in Transactions of Famena
University of Zagreb Faculty of Mechanical Engineering and Naval Architecture., 46(4), 59-72.
https://doi.org/10.21278/TOF.464041622

Aleksić V, Bulatović S, Zečević B, Maksimović A, Milović L. Processing of Data Obtained by the Testing of Steel under Low Cyclic Fatigue (Part I). in Transactions of Famena. 2022;46(4):59-72.
doi:10.21278/TOF.464041622 .

Aleksić, Vujadin, Bulatović, Srđan, Zečević, Bojana, Maksimović, Ana, Milović, Ljubica, "Processing of Data Obtained by the Testing of Steel under Low Cyclic Fatigue (Part I)" in Transactions of Famena, 46, no. 4 (2022):59-72,
https://doi.org/10.21278/TOF.464041622 . .

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  - CONF
AU  - Zečević, Bojana
AU  - Maksimović, Ana
AU  - Milović, Ljubica
AU  - Bulatović, Srđan
AU  - Aleksić, Vujadin
PY  - 2022
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/6429
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 experimental analysis which included impact toughness test. The analysis resulted in impact energy values, and their respective components, crack initiation and crack propagation energy, and represents the initial stage of extensive research involving the behavior of 14MoV6 3 steel. The aim was to determine the effects of temperature (room vs. operated), as well as the effects of specimen orientation with regards to the rolling direction, on the impact toughness and the relation between its components.
PB  - Elsevier B.V.
C3  - 23rd European Conference on Fracture, ECF 2022, Procedia Structural Integrity
T1  - Effect of temperature and specimen orientation on Charpy impact toughness
EP  - 1482
SP  - 1475
VL  - 42
DO  - 10.1016/j.prostr.2022.12.188
ER  - 

@conference{
author = "Zečević, Bojana and Maksimović, Ana and Milović, Ljubica and Bulatović, Srđan and Aleksić, Vujadin",
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 experimental analysis which included impact toughness test. The analysis resulted in impact energy values, and their respective components, crack initiation and crack propagation energy, and represents the initial stage of extensive research involving the behavior of 14MoV6 3 steel. The aim was to determine the effects of temperature (room vs. operated), as well as the effects of specimen orientation with regards to the rolling direction, on the impact toughness and the relation between its components.",
publisher = "Elsevier B.V.",
journal = "23rd European Conference on Fracture, ECF 2022, Procedia Structural Integrity",
title = "Effect of temperature and specimen orientation on Charpy impact toughness",
pages = "1482-1475",
volume = "42",
doi = "10.1016/j.prostr.2022.12.188"
}

Zečević, B., Maksimović, A., Milović, L., Bulatović, S.,& Aleksić, V.. (2022). Effect of temperature and specimen orientation on Charpy impact toughness. in 23rd European Conference on Fracture, ECF 2022, Procedia Structural Integrity
Elsevier B.V.., 42, 1475-1482.
https://doi.org/10.1016/j.prostr.2022.12.188

Zečević B, Maksimović A, Milović L, Bulatović S, Aleksić V. Effect of temperature and specimen orientation on Charpy impact toughness. in 23rd European Conference on Fracture, ECF 2022, Procedia Structural Integrity. 2022;42:1475-1482.
doi:10.1016/j.prostr.2022.12.188 .

Zečević, Bojana, Maksimović, Ana, Milović, Ljubica, Bulatović, Srđan, Aleksić, Vujadin, "Effect of temperature and specimen orientation on Charpy impact toughness" in 23rd European Conference on Fracture, ECF 2022, Procedia Structural Integrity, 42 (2022):1475-1482,
https://doi.org/10.1016/j.prostr.2022.12.188 . .

TY  - CONF
AU  - Maksimović, Ana
AU  - Milović, Ljubica
AU  - Zečević, Bojana
AU  - Đorđević, Branislav
AU  - Bulatović, Srđan
AU  - Aleksić, Vujadin
PY  - 2022
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/6431
AB  - This paper is devoted to the ductile-brittle transition behavior of high strength low alloyed structural steel NIOMOL 490K. This steel grade is designed for welded pressure vessels exposed to dynamic loads, operating at temperatures below zero, and that is why it must have acceptable toughness. Due to its importance for the safety assessment of pressure vessels, a characterization of this steel with Charpy V-notch test in range of temperature between-60 0C and +60 0C was undertaken. Ductile-to-brittle transition temperature curves were generated in the present study by using instrumented Charpy pendulum impact test on V-notch specimens. Notches were located in the parent material, heat-affected zone and weld metal. The nil-ductility temperature and tensile properties in temperature range from -60 0C to +60 0C are presented in this paper. We used different test temperatures to better understand ductile-to brittle transition response than just use either Charpy energy or other related ductility criteria.
PB  - Elsevier B.V.
C3  - 23rd European Conference on Fracture, ECF 2022, Procedia Structural Integrity
T1  - Determination of ductile-to-brittle transition temperature of NIOMOL 490K steel welded joints
EP  - 1368
SP  - 1361
VL  - 42
DO  - 10.1016/j.prostr.2022.12.173
ER  - 

@conference{
author = "Maksimović, Ana and Milović, Ljubica and Zečević, Bojana and Đorđević, Branislav and Bulatović, Srđan and Aleksić, Vujadin",
year = "2022",
abstract = "This paper is devoted to the ductile-brittle transition behavior of high strength low alloyed structural steel NIOMOL 490K. This steel grade is designed for welded pressure vessels exposed to dynamic loads, operating at temperatures below zero, and that is why it must have acceptable toughness. Due to its importance for the safety assessment of pressure vessels, a characterization of this steel with Charpy V-notch test in range of temperature between-60 0C and +60 0C was undertaken. Ductile-to-brittle transition temperature curves were generated in the present study by using instrumented Charpy pendulum impact test on V-notch specimens. Notches were located in the parent material, heat-affected zone and weld metal. The nil-ductility temperature and tensile properties in temperature range from -60 0C to +60 0C are presented in this paper. We used different test temperatures to better understand ductile-to brittle transition response than just use either Charpy energy or other related ductility criteria.",
publisher = "Elsevier B.V.",
journal = "23rd European Conference on Fracture, ECF 2022, Procedia Structural Integrity",
title = "Determination of ductile-to-brittle transition temperature of NIOMOL 490K steel welded joints",
pages = "1368-1361",
volume = "42",
doi = "10.1016/j.prostr.2022.12.173"
}

Maksimović, A., Milović, L., Zečević, B., Đorđević, B., Bulatović, S.,& Aleksić, V.. (2022). Determination of ductile-to-brittle transition temperature of NIOMOL 490K steel welded joints. in 23rd European Conference on Fracture, ECF 2022, Procedia Structural Integrity
Elsevier B.V.., 42, 1361-1368.
https://doi.org/10.1016/j.prostr.2022.12.173

Maksimović A, Milović L, Zečević B, Đorđević B, Bulatović S, Aleksić V. Determination of ductile-to-brittle transition temperature of NIOMOL 490K steel welded joints. in 23rd European Conference on Fracture, ECF 2022, Procedia Structural Integrity. 2022;42:1361-1368.
doi:10.1016/j.prostr.2022.12.173 .

Maksimović, Ana, Milović, Ljubica, Zečević, Bojana, Đorđević, Branislav, Bulatović, Srđan, Aleksić, Vujadin, "Determination of ductile-to-brittle transition temperature of NIOMOL 490K steel welded joints" in 23rd European Conference on Fracture, ECF 2022, Procedia Structural Integrity, 42 (2022):1361-1368,
https://doi.org/10.1016/j.prostr.2022.12.173 . .

TY  - JOUR
AU  - Bulatović, Srđan M.
AU  - Aleksić, Vujadin D.
AU  - Milović, Ljubica P.
AU  - Zečević, Bojana V.
PY  - 2022
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/5011
AB  - The most important characteristics for service safety of welded joints are those describing crack initiation and growth caused by variable loading. Crack initiation and growth caused by variable loading is the subject of numerous investigations. This paper shows the determination of parameters of the fatigue crack for constituents of welded joints produced of high strength low alloyed steel. The crack growth law of Paris establishes the relation between the applied variable load quantity or the corresponding stress intensity factor range and crack growth per cycle. Results have shown that the position of the notch and crack initiation affect the values of the stress intensity range of fatigue threshold Delta Kth and parameters in the Paris' equation.
PB  - Faculty of Mechanical Engineering, Belgrade University
T2  - FME Transactions
T1  - Application of Paris' Law Under Variable Loading
EP  - 78
IS  - 1
SP  - 72
VL  - 50
DO  - 10.5937/fme2201072B
ER  - 

@article{
author = "Bulatović, Srđan M. and Aleksić, Vujadin D. and Milović, Ljubica P. and Zečević, Bojana V.",
year = "2022",
abstract = "The most important characteristics for service safety of welded joints are those describing crack initiation and growth caused by variable loading. Crack initiation and growth caused by variable loading is the subject of numerous investigations. This paper shows the determination of parameters of the fatigue crack for constituents of welded joints produced of high strength low alloyed steel. The crack growth law of Paris establishes the relation between the applied variable load quantity or the corresponding stress intensity factor range and crack growth per cycle. Results have shown that the position of the notch and crack initiation affect the values of the stress intensity range of fatigue threshold Delta Kth and parameters in the Paris' equation.",
publisher = "Faculty of Mechanical Engineering, Belgrade University",
journal = "FME Transactions",
title = "Application of Paris' Law Under Variable Loading",
pages = "78-72",
number = "1",
volume = "50",
doi = "10.5937/fme2201072B"
}

Bulatović, S. M., Aleksić, V. D., Milović, L. P.,& Zečević, B. V.. (2022). Application of Paris' Law Under Variable Loading. in FME Transactions
Faculty of Mechanical Engineering, Belgrade University., 50(1), 72-78.
https://doi.org/10.5937/fme2201072B

Bulatović SM, Aleksić VD, Milović LP, Zečević BV. Application of Paris' Law Under Variable Loading. in FME Transactions. 2022;50(1):72-78.
doi:10.5937/fme2201072B .

Bulatović, Srđan M., Aleksić, Vujadin D., Milović, Ljubica P., Zečević, Bojana V., "Application of Paris' Law Under Variable Loading" in FME Transactions, 50, no. 1 (2022):72-78,
https://doi.org/10.5937/fme2201072B . .

TY  - CONF
AU  - Milović, Ljubica
AU  - Sedmak, Aleksandar
AU  - Blačić, Ivo
AU  - Vuherer, Tomaž
AU  - Petrovski, Blagoj
PY  - 2022
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/6428
AB  - In order to assess the integrity of welded pressure vessel containing a crack, the behavior of three-point bending specimens made of HSLA steel welded joint are tested at -40 °C, and their fracture behaviour analyzed, as a conservative measure of crack resistance. Specimens were made of low-alloyed steel NIONIKRAL 70, welded by SAW process. Surface notches were machined by the electro-erosion method in the parent metal (PM), heat affected zone (HAZ) and weld metal (WM). The highest resistance to cracking was in PM, and the lowest one in WM, due to so-called pop-in behaviour.
PB  - Elsevier B.V.
C3  - 23rd European Conference on Fracture, ECF 2022, Procedia Structural Integrity
T1  - Experimental Analysis of HSLA Steel Welded Joint Fracture Behaviour
EP  - 1502
SP  - 1497
VL  - 42
DO  - 10.1016/j.prostr.2022.12.190
ER  - 

@conference{
author = "Milović, Ljubica and Sedmak, Aleksandar and Blačić, Ivo and Vuherer, Tomaž and Petrovski, Blagoj",
year = "2022",
abstract = "In order to assess the integrity of welded pressure vessel containing a crack, the behavior of three-point bending specimens made of HSLA steel welded joint are tested at -40 °C, and their fracture behaviour analyzed, as a conservative measure of crack resistance. Specimens were made of low-alloyed steel NIONIKRAL 70, welded by SAW process. Surface notches were machined by the electro-erosion method in the parent metal (PM), heat affected zone (HAZ) and weld metal (WM). The highest resistance to cracking was in PM, and the lowest one in WM, due to so-called pop-in behaviour.",
publisher = "Elsevier B.V.",
journal = "23rd European Conference on Fracture, ECF 2022, Procedia Structural Integrity",
title = "Experimental Analysis of HSLA Steel Welded Joint Fracture Behaviour",
pages = "1502-1497",
volume = "42",
doi = "10.1016/j.prostr.2022.12.190"
}

Milović, L., Sedmak, A., Blačić, I., Vuherer, T.,& Petrovski, B.. (2022). Experimental Analysis of HSLA Steel Welded Joint Fracture Behaviour. in 23rd European Conference on Fracture, ECF 2022, Procedia Structural Integrity
Elsevier B.V.., 42, 1497-1502.
https://doi.org/10.1016/j.prostr.2022.12.190

Milović L, Sedmak A, Blačić I, Vuherer T, Petrovski B. Experimental Analysis of HSLA Steel Welded Joint Fracture Behaviour. in 23rd European Conference on Fracture, ECF 2022, Procedia Structural Integrity. 2022;42:1497-1502.
doi:10.1016/j.prostr.2022.12.190 .

Milović, Ljubica, Sedmak, Aleksandar, Blačić, Ivo, Vuherer, Tomaž, Petrovski, Blagoj, "Experimental Analysis of HSLA Steel Welded Joint Fracture Behaviour" in 23rd European Conference on Fracture, ECF 2022, Procedia Structural Integrity, 42 (2022):1497-1502,
https://doi.org/10.1016/j.prostr.2022.12.190 . .

TY  - JOUR
AU  - Aleksić, Vujadin
AU  - Dojčinović, Marina
AU  - Milović, Ljubica
AU  - Zečević, Bojana
AU  - Maksimović, Ana
PY  - 2021
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/5623
AB  - Polomljene epruvete za ispitivanje niskocikličnim zamorom čelika Nionikral 70 (NN-70) osnovnog materijala (OM) i simulirane zone pod uticajem toplote (SZUT) poslužile su NAM za izradu uzoraka za ispitivanje otpornosti na kavitaciju. Za ispitivanje u laboratorijskim uslovima primenjena je ultrazvučna vibraciona metoda kavitacije (metoda stacionarnog uzorka). Uslovi i procedura ispitivanja, priprema uzoraka kao i interpretacija rezultata definisani su standardom ASTM G32. Površine uzoraka čelika NN-70 OM i SZUT bile su izložene dejstvu kavitacije i praćenju oštećenja kroz određeno vreme. Merenje gubitka mase uzoraka na analitičkoj vagi posle određenog vremena omogućilo NAM je određivanje kavitacione brzine kao mere procene otpornosti materijala na dejstvo kavitacije. Za praćenje varijacija u morfologiji površine s promenom vremena ispitivanja primenjena je skenirajuća elektronska mikroskopija (SEM). Na osnovu rezultata ispitivanja otpornosti na kavitaciju u radu su analizirane morfologije oštećenja površina za različita vremena izlaganja dejstvu kavitacije uzoraka OM i SZUT čelika NN-70 kao i mehanizmi koji su doveli do oštećenja površina uzoraka.
AB  - Broken test tubes for low-cycle fatigue testing of Nionicral 70 (NN-70) parent material (PM) steel and simulated heat-affected zones (SHAZ) were used to produce samples for cavitation resistance testing. Ultrasonic vibrational cavitation method (stationary sample method) was applied for testing in laboratory conditions. The test conditions and procedure, sample preparation and interpretation of results are defined by ASTM G32. The surfaces of the NN-70 PM and SHAZ steel samples were exposed to cavitation and damage monitoring over time. Measuring the weight loss of samples on the analytical balance after a certain time allowed us to determine the cavitation velocity as a measure of the material's resistance to the effect of cavitation. Scanning electron microscopy (SEM) was applied to monitor variations in surface morphology with changing test time. On the basis of the results of the cavitation resistance test, the morphologies of the surface damage for different exposure times of the cavitation of PM and SHAZ steel NN-70 samples were analyzed, as well as the mechanisms that led to the damage of the sample surfaces.
PB  - Inženjersko društvo za koroziju, Beograd
T2  - Zaštita materijala
T1  - Mehanizmi i morfologije kavitacionog oštećenja čelika Nionikral 70
T1  - Mechanisms and morphologies of cavitation damage of NN 70 steel
EP  - 105
IS  - 2
SP  - 95
VL  - 2021
DO  - 10.5937/zasmat2102095A
ER  - 

@article{
author = "Aleksić, Vujadin and Dojčinović, Marina and Milović, Ljubica and Zečević, Bojana and Maksimović, Ana",
year = "2021",
abstract = "Polomljene epruvete za ispitivanje niskocikličnim zamorom čelika Nionikral 70 (NN-70) osnovnog materijala (OM) i simulirane zone pod uticajem toplote (SZUT) poslužile su NAM za izradu uzoraka za ispitivanje otpornosti na kavitaciju. Za ispitivanje u laboratorijskim uslovima primenjena je ultrazvučna vibraciona metoda kavitacije (metoda stacionarnog uzorka). Uslovi i procedura ispitivanja, priprema uzoraka kao i interpretacija rezultata definisani su standardom ASTM G32. Površine uzoraka čelika NN-70 OM i SZUT bile su izložene dejstvu kavitacije i praćenju oštećenja kroz određeno vreme. Merenje gubitka mase uzoraka na analitičkoj vagi posle određenog vremena omogućilo NAM je određivanje kavitacione brzine kao mere procene otpornosti materijala na dejstvo kavitacije. Za praćenje varijacija u morfologiji površine s promenom vremena ispitivanja primenjena je skenirajuća elektronska mikroskopija (SEM). Na osnovu rezultata ispitivanja otpornosti na kavitaciju u radu su analizirane morfologije oštećenja površina za različita vremena izlaganja dejstvu kavitacije uzoraka OM i SZUT čelika NN-70 kao i mehanizmi koji su doveli do oštećenja površina uzoraka., Broken test tubes for low-cycle fatigue testing of Nionicral 70 (NN-70) parent material (PM) steel and simulated heat-affected zones (SHAZ) were used to produce samples for cavitation resistance testing. Ultrasonic vibrational cavitation method (stationary sample method) was applied for testing in laboratory conditions. The test conditions and procedure, sample preparation and interpretation of results are defined by ASTM G32. The surfaces of the NN-70 PM and SHAZ steel samples were exposed to cavitation and damage monitoring over time. Measuring the weight loss of samples on the analytical balance after a certain time allowed us to determine the cavitation velocity as a measure of the material's resistance to the effect of cavitation. Scanning electron microscopy (SEM) was applied to monitor variations in surface morphology with changing test time. On the basis of the results of the cavitation resistance test, the morphologies of the surface damage for different exposure times of the cavitation of PM and SHAZ steel NN-70 samples were analyzed, as well as the mechanisms that led to the damage of the sample surfaces.",
publisher = "Inženjersko društvo za koroziju, Beograd",
journal = "Zaštita materijala",
title = "Mehanizmi i morfologije kavitacionog oštećenja čelika Nionikral 70, Mechanisms and morphologies of cavitation damage of NN 70 steel",
pages = "105-95",
number = "2",
volume = "2021",
doi = "10.5937/zasmat2102095A"
}

Aleksić, V., Dojčinović, M., Milović, L., Zečević, B.,& Maksimović, A.. (2021). Mehanizmi i morfologije kavitacionog oštećenja čelika Nionikral 70. in Zaštita materijala
Inženjersko društvo za koroziju, Beograd., 2021(2), 95-105.
https://doi.org/10.5937/zasmat2102095A

Aleksić V, Dojčinović M, Milović L, Zečević B, Maksimović A. Mehanizmi i morfologije kavitacionog oštećenja čelika Nionikral 70. in Zaštita materijala. 2021;2021(2):95-105.
doi:10.5937/zasmat2102095A .

Aleksić, Vujadin, Dojčinović, Marina, Milović, Ljubica, Zečević, Bojana, Maksimović, Ana, "Mehanizmi i morfologije kavitacionog oštećenja čelika Nionikral 70" in Zaštita materijala, 2021, no. 2 (2021):95-105,
https://doi.org/10.5937/zasmat2102095A . .

TY  - JOUR
AU  - Bulatović, Srđan
AU  - Aleksić, Vujadin
AU  - Milović, Ljubica
AU  - Zečević, Bojana
PY  - 2021
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/4789
AB  - Brittle damages have been examined widely since welding became common practice when it comes to carrying out robust structures. Welded structure of the ship hull has to be continuous. Brittle damages that occur on hull structures have always been examined thoroughly. Cracks are most commonly initiated at locations where stress concentrators exist. These concentrators can originate due to flaws that occur during the design phase or due to mistakes that occur during the assembly of the structure. When it comes to failures and damages that occur at ship structures, it has been noticed that damages due to brittleness practically always happen at low temperatures. Impact test analysis is significant due to the fact that it replicates the ductile to brittle transition of steel in practically identical range of temperatures for all ship structures. Impact of ductile-brittle transition temperature is an important factor especially because there have been many ship failures and damages in history. In ship structures made of welded joints of high strength low-alloy (HSLA) steels with their segments (parent metal, weld metal and heat-affected- zone), the toughness test determines the tendency of steel to brittle fracture, respectively the tendency to increase brittleness during exploitation. Parameters obtained by testing the properties of plasticity are the fundamental for the composition of ship structures with the aim of realize strengths under tested load. The test results of high strength low-alloy steel toughness assessment at different test temperatures show that temperature significantly affects the impact toughness of steels and their alloys.
T2  - Brodogradnja
T1  - An analysis of impact testing of high strength low-alloy steels used in ship construction
EP  - 12
IS  - 3
SP  - 1
VL  - 72
DO  - 10.21278/brod72301
ER  - 

@article{
author = "Bulatović, Srđan and Aleksić, Vujadin and Milović, Ljubica and Zečević, Bojana",
year = "2021",
abstract = "Brittle damages have been examined widely since welding became common practice when it comes to carrying out robust structures. Welded structure of the ship hull has to be continuous. Brittle damages that occur on hull structures have always been examined thoroughly. Cracks are most commonly initiated at locations where stress concentrators exist. These concentrators can originate due to flaws that occur during the design phase or due to mistakes that occur during the assembly of the structure. When it comes to failures and damages that occur at ship structures, it has been noticed that damages due to brittleness practically always happen at low temperatures. Impact test analysis is significant due to the fact that it replicates the ductile to brittle transition of steel in practically identical range of temperatures for all ship structures. Impact of ductile-brittle transition temperature is an important factor especially because there have been many ship failures and damages in history. In ship structures made of welded joints of high strength low-alloy (HSLA) steels with their segments (parent metal, weld metal and heat-affected- zone), the toughness test determines the tendency of steel to brittle fracture, respectively the tendency to increase brittleness during exploitation. Parameters obtained by testing the properties of plasticity are the fundamental for the composition of ship structures with the aim of realize strengths under tested load. The test results of high strength low-alloy steel toughness assessment at different test temperatures show that temperature significantly affects the impact toughness of steels and their alloys.",
journal = "Brodogradnja",
title = "An analysis of impact testing of high strength low-alloy steels used in ship construction",
pages = "12-1",
number = "3",
volume = "72",
doi = "10.21278/brod72301"
}

Bulatović, S., Aleksić, V., Milović, L.,& Zečević, B.. (2021). An analysis of impact testing of high strength low-alloy steels used in ship construction. in Brodogradnja, 72(3), 1-12.
https://doi.org/10.21278/brod72301

Bulatović S, Aleksić V, Milović L, Zečević B. An analysis of impact testing of high strength low-alloy steels used in ship construction. in Brodogradnja. 2021;72(3):1-12.
doi:10.21278/brod72301 .

Bulatović, Srđan, Aleksić, Vujadin, Milović, Ljubica, Zečević, Bojana, "An analysis of impact testing of high strength low-alloy steels used in ship construction" in Brodogradnja, 72, no. 3 (2021):1-12,
https://doi.org/10.21278/brod72301 . .

TY  - JOUR
AU  - Bulatović, Srđan
AU  - Aleksić, Vujadin
AU  - Milović, Ljubica
AU  - Zečević, Bojana
PY  - 2021
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/4787
AB  - The cycle loading of a material results in the modification of its properties and so in this paper is presented the behaviour of the fatigue life using low-cycle fatigue parameters. By applying the Coffin-Manson equation in fatigue loading of the tested specimens, the crack initiation has been computed. The stabilized hysteresis loop is a characteristic of all hystereses and it is used to determine all of the parameters for the low cycle fatigue (LCF) assessment. The experimental results have given us important information on the understanding of fatigue behaviour of high strength low-alloyed steel (HSLA) and its welded joints.
T2  - Structural Integrity and Life-Integritet I Vek Konstrukcija
T1  - Determination of the coffin-manson equation under low-cycle fatigue conditions
EP  - 228
IS  - 3
SP  - 225
VL  - 21
UR  - https://hdl.handle.net/21.15107/rcub_technorep_4787
ER  - 

@article{
author = "Bulatović, Srđan and Aleksić, Vujadin and Milović, Ljubica and Zečević, Bojana",
year = "2021",
abstract = "The cycle loading of a material results in the modification of its properties and so in this paper is presented the behaviour of the fatigue life using low-cycle fatigue parameters. By applying the Coffin-Manson equation in fatigue loading of the tested specimens, the crack initiation has been computed. The stabilized hysteresis loop is a characteristic of all hystereses and it is used to determine all of the parameters for the low cycle fatigue (LCF) assessment. The experimental results have given us important information on the understanding of fatigue behaviour of high strength low-alloyed steel (HSLA) and its welded joints.",
journal = "Structural Integrity and Life-Integritet I Vek Konstrukcija",
title = "Determination of the coffin-manson equation under low-cycle fatigue conditions",
pages = "228-225",
number = "3",
volume = "21",
url = "https://hdl.handle.net/21.15107/rcub_technorep_4787"
}

Bulatović, S., Aleksić, V., Milović, L.,& Zečević, B.. (2021). Determination of the coffin-manson equation under low-cycle fatigue conditions. in Structural Integrity and Life-Integritet I Vek Konstrukcija, 21(3), 225-228.
https://hdl.handle.net/21.15107/rcub_technorep_4787

Bulatović S, Aleksić V, Milović L, Zečević B. Determination of the coffin-manson equation under low-cycle fatigue conditions. in Structural Integrity and Life-Integritet I Vek Konstrukcija. 2021;21(3):225-228.
https://hdl.handle.net/21.15107/rcub_technorep_4787 .

Bulatović, Srđan, Aleksić, Vujadin, Milović, Ljubica, Zečević, Bojana, "Determination of the coffin-manson equation under low-cycle fatigue conditions" in Structural Integrity and Life-Integritet I Vek Konstrukcija, 21, no. 3 (2021):225-228,
https://hdl.handle.net/21.15107/rcub_technorep_4787 .

TY  - JOUR
AU  - Manic, Nebojsa
AU  - Jankovic, Bojan
AU  - Milović, Ljubica
AU  - Komatina, Mirko
AU  - Stojiljkovic, Dragoslava
PY  - 2021
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/5014
AB  - This study presents the experimental results of the mechanical and thermophysical properties of wood pellet samples important for their utilization in pellet stoves and boilers for heat production. The impact of operational parameters during the production process on a single pelletizer unit for three typical domestic commercial wood pellet samples (PWP110, BWP110, and BWP140) on fuel particle mechanical characteristics and related thermal properties was analyzed. It was concluded that the changes in raw material selection, as well as related operating parameters (extrusion length, i.e., die temperature during production process), have influenced the key mechanical and thermal characteristics of tested commercial wood pellets. The presented results have indicated the existence of a thin solid layer (due to waxes and subsequently lignin coating layer behaviors depending on their glass transition temperatures) on the surface of the BWP140 pellet sample. This layer leads to increasing the thermal resistance in the considered sample which can be explained by decreasing the effective thermal conductivity. Also, the forming of this layer on the surface of the wood pellet sample was caused by the production process (high-temperature impact explained by increasing friction between the die and feedstock during pellets production). It could be related to a lower value of effective thermal conductivity and specific heat capacity for considered (Beech) wood pellet sample.
T2  - Biomass Conversion and Biorefinery
T1  - The impact of production operating parameters on mechanical and thermophysical characteristics of commercial wood pellets
DO  - 10.1007/s13399-021-01609-4
ER  - 

@article{
author = "Manic, Nebojsa and Jankovic, Bojan and Milović, Ljubica and Komatina, Mirko and Stojiljkovic, Dragoslava",
year = "2021",
abstract = "This study presents the experimental results of the mechanical and thermophysical properties of wood pellet samples important for their utilization in pellet stoves and boilers for heat production. The impact of operational parameters during the production process on a single pelletizer unit for three typical domestic commercial wood pellet samples (PWP110, BWP110, and BWP140) on fuel particle mechanical characteristics and related thermal properties was analyzed. It was concluded that the changes in raw material selection, as well as related operating parameters (extrusion length, i.e., die temperature during production process), have influenced the key mechanical and thermal characteristics of tested commercial wood pellets. The presented results have indicated the existence of a thin solid layer (due to waxes and subsequently lignin coating layer behaviors depending on their glass transition temperatures) on the surface of the BWP140 pellet sample. This layer leads to increasing the thermal resistance in the considered sample which can be explained by decreasing the effective thermal conductivity. Also, the forming of this layer on the surface of the wood pellet sample was caused by the production process (high-temperature impact explained by increasing friction between the die and feedstock during pellets production). It could be related to a lower value of effective thermal conductivity and specific heat capacity for considered (Beech) wood pellet sample.",
journal = "Biomass Conversion and Biorefinery",
title = "The impact of production operating parameters on mechanical and thermophysical characteristics of commercial wood pellets",
doi = "10.1007/s13399-021-01609-4"
}

Manic, N., Jankovic, B., Milović, L., Komatina, M.,& Stojiljkovic, D.. (2021). The impact of production operating parameters on mechanical and thermophysical characteristics of commercial wood pellets. in Biomass Conversion and Biorefinery.
https://doi.org/10.1007/s13399-021-01609-4

Manic N, Jankovic B, Milović L, Komatina M, Stojiljkovic D. The impact of production operating parameters on mechanical and thermophysical characteristics of commercial wood pellets. in Biomass Conversion and Biorefinery. 2021;.
doi:10.1007/s13399-021-01609-4 .

Manic, Nebojsa, Jankovic, Bojan, Milović, Ljubica, Komatina, Mirko, Stojiljkovic, Dragoslava, "The impact of production operating parameters on mechanical and thermophysical characteristics of commercial wood pellets" in Biomass Conversion and Biorefinery (2021),
https://doi.org/10.1007/s13399-021-01609-4 . .

TY  - JOUR
AU  - Sedmak, Aleksandar
AU  - Hemer, Abubkr
AU  - Sedmak, Simon A.
AU  - Milović, Ljubica
AU  - Grbovic, Aleksandar
AU  - Cabrilo, Aleksandar
AU  - Kljajin, Milan
PY  - 2021
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/4910
AB  - Fatigue crack growth through different welded joint regions was investigated, in terms of welded joint geometry and fatigue crack position. In the first phase of investigation, numerical simulation of crack growth in a welded joint made of steel P460NL1 was performed using extended Finite Element Methods (xFEM). Numerical models employed Paris law, using experimentally determined coefficients for each welded joint zone. Weld geometry was varied by using different heat affected zone (HAZ) widths, i.e. fatigue crack lengths. The second stage involved similar numerical models with different material (Protac 500). Fatigue lives for regions in both models were then compared.
T2  - International Journal of Fatigue
T1  - Welded joint geometry effect on fatigue crack growth resistance in different metallic materials
VL  - 150
DO  - 10.1016/j.ijfatigue.2021.106298
ER  - 

@article{
author = "Sedmak, Aleksandar and Hemer, Abubkr and Sedmak, Simon A. and Milović, Ljubica and Grbovic, Aleksandar and Cabrilo, Aleksandar and Kljajin, Milan",
year = "2021",
abstract = "Fatigue crack growth through different welded joint regions was investigated, in terms of welded joint geometry and fatigue crack position. In the first phase of investigation, numerical simulation of crack growth in a welded joint made of steel P460NL1 was performed using extended Finite Element Methods (xFEM). Numerical models employed Paris law, using experimentally determined coefficients for each welded joint zone. Weld geometry was varied by using different heat affected zone (HAZ) widths, i.e. fatigue crack lengths. The second stage involved similar numerical models with different material (Protac 500). Fatigue lives for regions in both models were then compared.",
journal = "International Journal of Fatigue",
title = "Welded joint geometry effect on fatigue crack growth resistance in different metallic materials",
volume = "150",
doi = "10.1016/j.ijfatigue.2021.106298"
}

Sedmak, A., Hemer, A., Sedmak, S. A., Milović, L., Grbovic, A., Cabrilo, A.,& Kljajin, M.. (2021). Welded joint geometry effect on fatigue crack growth resistance in different metallic materials. in International Journal of Fatigue, 150.
https://doi.org/10.1016/j.ijfatigue.2021.106298

Sedmak A, Hemer A, Sedmak SA, Milović L, Grbovic A, Cabrilo A, Kljajin M. Welded joint geometry effect on fatigue crack growth resistance in different metallic materials. in International Journal of Fatigue. 2021;150.
doi:10.1016/j.ijfatigue.2021.106298 .

Sedmak, Aleksandar, Hemer, Abubkr, Sedmak, Simon A., Milović, Ljubica, Grbovic, Aleksandar, Cabrilo, Aleksandar, Kljajin, Milan, "Welded joint geometry effect on fatigue crack growth resistance in different metallic materials" in International Journal of Fatigue, 150 (2021),
https://doi.org/10.1016/j.ijfatigue.2021.106298 . .

TY  - JOUR
AU  - Aranđelović, M.
AU  - Sedmak, S. A.
AU  - Milović, Ljubica
AU  - Maksimović, Ana
AU  - Bozic, Z.
PY  - 2020
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/4754
AB  - Crack propagation in 3PB specimen has been investigated experimentally by using Digital Image Correlation (DIC) technique. For this purpose, specimens were taken from butt welded plates, made of P460NL1 micro-alloyed steel. Fatigue pre-crack of 3PB specimens was introduced in the weld metal. Specimens were then statically loaded and analyzed using digital image correlation software ARAMIS to assess strain fields and crack propagation paths. Bifurcation of cracks was noticed as the main characteristics of crack prop-agation in the analyzed case.
T2  - 1st Virtual European Conference on Fracture - Vecf1
T1  - Crack propagation in 3PB specimen made from welded joint
EP  - 445
SP  - 440
VL  - 28
DO  - 10.1016/j.prostr.2020.10.051
ER  - 

@article{
author = "Aranđelović, M. and Sedmak, S. A. and Milović, Ljubica and Maksimović, Ana and Bozic, Z.",
year = "2020",
abstract = "Crack propagation in 3PB specimen has been investigated experimentally by using Digital Image Correlation (DIC) technique. For this purpose, specimens were taken from butt welded plates, made of P460NL1 micro-alloyed steel. Fatigue pre-crack of 3PB specimens was introduced in the weld metal. Specimens were then statically loaded and analyzed using digital image correlation software ARAMIS to assess strain fields and crack propagation paths. Bifurcation of cracks was noticed as the main characteristics of crack prop-agation in the analyzed case.",
journal = "1st Virtual European Conference on Fracture - Vecf1",
title = "Crack propagation in 3PB specimen made from welded joint",
pages = "445-440",
volume = "28",
doi = "10.1016/j.prostr.2020.10.051"
}

Aranđelović, M., Sedmak, S. A., Milović, L., Maksimović, A.,& Bozic, Z.. (2020). Crack propagation in 3PB specimen made from welded joint. in 1st Virtual European Conference on Fracture - Vecf1, 28, 440-445.
https://doi.org/10.1016/j.prostr.2020.10.051

Aranđelović M, Sedmak SA, Milović L, Maksimović A, Bozic Z. Crack propagation in 3PB specimen made from welded joint. in 1st Virtual European Conference on Fracture - Vecf1. 2020;28:440-445.
doi:10.1016/j.prostr.2020.10.051 .

Aranđelović, M., Sedmak, S. A., Milović, Ljubica, Maksimović, Ana, Bozic, Z., "Crack propagation in 3PB specimen made from welded joint" in 1st Virtual European Conference on Fracture - Vecf1, 28 (2020):440-445,
https://doi.org/10.1016/j.prostr.2020.10.051 . .

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, Vujadin
AU  - Aleksić, Bojana
AU  - Prodanović, Ana
AU  - Milović, Ljubica
PY  - 2020
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/4572
AB  - In present paper, based on the results of the experimental study of the behaviour of the samples made of a HSLA steel, in the form of round smooth specimens (RSS) under LCF conditions (with controlled and completely reversible strain Δε/2 = const, Rε = εmin/εmax = −1, according to ISO 12106: 2003 (E)) and square specimens (SqS) under conditions of HCF conditions (with controlled one-way variable load on tension with σmin = const, according to ISO 12110-1:2013), a computational stress analysis was performed using the FE method and the behaviour of this steel in the fatigue behaviour simulation (LCF and HCF) in SolidWorks programme was shown. On the basis of the performed analysis of the results of the stress-strain state and the determination of the life using the life isolines for a particular load cycle involving the entire RSS ligament, i.e. SqS for a particular load in a wide range of LCF and HCF loads and comparison with the results of experimental tests, a figure i.e. graphical presentation was given and conclusions were drawn that justify the efforts for numerical assessment of the life cycle of the loaded machine parts.
PB  - International Conference on New Technologies, Development and Application, NT 2020
T2  - Lecture Notes in Networks and Systems
T1  - HSLA Steel - Simulation of Fatigue
EP  - 321
SP  - 314
VL  - 128 LNNS
DO  - 10.1007/978-3-030-46817-0_36
ER  - 

@article{
author = "Aleksić, Vujadin and Aleksić, Bojana and Prodanović, Ana and Milović, Ljubica",
year = "2020",
abstract = "In present paper, based on the results of the experimental study of the behaviour of the samples made of a HSLA steel, in the form of round smooth specimens (RSS) under LCF conditions (with controlled and completely reversible strain Δε/2 = const, Rε = εmin/εmax = −1, according to ISO 12106: 2003 (E)) and square specimens (SqS) under conditions of HCF conditions (with controlled one-way variable load on tension with σmin = const, according to ISO 12110-1:2013), a computational stress analysis was performed using the FE method and the behaviour of this steel in the fatigue behaviour simulation (LCF and HCF) in SolidWorks programme was shown. On the basis of the performed analysis of the results of the stress-strain state and the determination of the life using the life isolines for a particular load cycle involving the entire RSS ligament, i.e. SqS for a particular load in a wide range of LCF and HCF loads and comparison with the results of experimental tests, a figure i.e. graphical presentation was given and conclusions were drawn that justify the efforts for numerical assessment of the life cycle of the loaded machine parts.",
publisher = "International Conference on New Technologies, Development and Application, NT 2020",
journal = "Lecture Notes in Networks and Systems",
title = "HSLA Steel - Simulation of Fatigue",
pages = "321-314",
volume = "128 LNNS",
doi = "10.1007/978-3-030-46817-0_36"
}

Aleksić, V., Aleksić, B., Prodanović, A.,& Milović, L.. (2020). HSLA Steel - Simulation of Fatigue. in Lecture Notes in Networks and Systems
International Conference on New Technologies, Development and Application, NT 2020., 128 LNNS, 314-321.
https://doi.org/10.1007/978-3-030-46817-0_36

Aleksić V, Aleksić B, Prodanović A, Milović L. HSLA Steel - Simulation of Fatigue. in Lecture Notes in Networks and Systems. 2020;128 LNNS:314-321.
doi:10.1007/978-3-030-46817-0_36 .

Aleksić, Vujadin, Aleksić, Bojana, Prodanović, Ana, Milović, Ljubica, "HSLA Steel - Simulation of Fatigue" in Lecture Notes in Networks and Systems, 128 LNNS (2020):314-321,
https://doi.org/10.1007/978-3-030-46817-0_36 . .

TY  - JOUR
AU  - Hemer, Abubkr M.
AU  - Sedmak, Simon A.
AU  - Milović, Ljubica
AU  - Grbovic, Aleksandar
AU  - Sedmak, Aleksandar
PY  - 2020
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/4753
AB  - Fatigue behaviour of welded joints is investigated, in terms of welded joint geometry and the fatigue crack position. It is based on previous work which involved numerical simulation of fatigue crack growth in a welded joint made of micro-alloyed, low-carbon pressure vessel steel P460NL1, with the main focus on fatigue crack growth rate through different welded joint regions. The goal here was to change the size of the heat affected zone, as the region in which the fatigue crack initiated, and to compare the results obtained for new crack length values with the original ones, obtained by creating numerical models based on experimental data. A number of models were created, some of which simulated the case with a bigger heat affected zone (and, consequently, a smaller crack length in the weld metal), and other which simulated the case with a smaller heat affected zone. Due to the micro-structural differences between these two welded joint regions, noticeable differences appeared in the numbers of cycles obtained for each zone with varying fatigue crack lengths, as well as in the total number of cycles for both zones through which the crack propagated.
T2  - 1st Virtual European Conference on Fracture - Vecf1
T1  - FEM simulation of welded joint geometry influence on fatigue crack growth resistance
EP  - 1832
SP  - 1827
VL  - 28
DO  - 10.1016/j.prostr.2020.11.005
ER  - 

@article{
author = "Hemer, Abubkr M. and Sedmak, Simon A. and Milović, Ljubica and Grbovic, Aleksandar and Sedmak, Aleksandar",
year = "2020",
abstract = "Fatigue behaviour of welded joints is investigated, in terms of welded joint geometry and the fatigue crack position. It is based on previous work which involved numerical simulation of fatigue crack growth in a welded joint made of micro-alloyed, low-carbon pressure vessel steel P460NL1, with the main focus on fatigue crack growth rate through different welded joint regions. The goal here was to change the size of the heat affected zone, as the region in which the fatigue crack initiated, and to compare the results obtained for new crack length values with the original ones, obtained by creating numerical models based on experimental data. A number of models were created, some of which simulated the case with a bigger heat affected zone (and, consequently, a smaller crack length in the weld metal), and other which simulated the case with a smaller heat affected zone. Due to the micro-structural differences between these two welded joint regions, noticeable differences appeared in the numbers of cycles obtained for each zone with varying fatigue crack lengths, as well as in the total number of cycles for both zones through which the crack propagated.",
journal = "1st Virtual European Conference on Fracture - Vecf1",
title = "FEM simulation of welded joint geometry influence on fatigue crack growth resistance",
pages = "1832-1827",
volume = "28",
doi = "10.1016/j.prostr.2020.11.005"
}

Hemer, A. M., Sedmak, S. A., Milović, L., Grbovic, A.,& Sedmak, A.. (2020). FEM simulation of welded joint geometry influence on fatigue crack growth resistance. in 1st Virtual European Conference on Fracture - Vecf1, 28, 1827-1832.
https://doi.org/10.1016/j.prostr.2020.11.005

Hemer AM, Sedmak SA, Milović L, Grbovic A, Sedmak A. FEM simulation of welded joint geometry influence on fatigue crack growth resistance. in 1st Virtual European Conference on Fracture - Vecf1. 2020;28:1827-1832.
doi:10.1016/j.prostr.2020.11.005 .

Hemer, Abubkr M., Sedmak, Simon A., Milović, Ljubica, Grbovic, Aleksandar, Sedmak, Aleksandar, "FEM simulation of welded joint geometry influence on fatigue crack growth resistance" in 1st Virtual European Conference on Fracture - Vecf1, 28 (2020):1827-1832,
https://doi.org/10.1016/j.prostr.2020.11.005 . .

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 . .