TY  - JOUR
AU  - Veljić, Darko
AU  - Rakin, Marko
AU  - Sedmak, Aleksandar
AU  - Radović, Nenad A.
AU  - Međo, Bojan
AU  - Mrdak, Mihailo
AU  - Bajić, Darko
PY  - 2022
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/3739
AB  - The influence of friction stir welding parameters on thermo-mechanical behav-ior of the material during welding is analyzed. An aluminum alloy is considered (Al 2024 T351), and different rotating and welding speeds are applied. The finite element model consists of the working plate (Al alloy), backing plate and welding tool. The influence of the welding conditions on material behavior is taken into account the application of the Johnson-Cook material model. The rotation speed of the tool affects the results. If increased, it contributes to an increase of friction-gen-erated heat intensity. The other component of the generated heat, which stems from the plastic deformation of the material, is negligibly changed. When the welding speed, i.e. tool translation speed, is increased, the intensity of friction-generated heat decreases, while the heat generation due to plastic deforming is becoming more pronounced. Summed, this leads to rather small change of the total genera-tion. The changes of the heat generation influence both the temperature field and reaction force. Also, the inadequate selection of welding parameters resulted in occurrence of the defects (pores) in the model.
PB  - Univerzitet u Beogradu - Institut za nuklearne nauke Vinča, Beograd
T2  - Thermal Science
T1  - Thermo-mechanical analysis of linear welding stage in friction stir welding influence of welding parameters
EP  - 2134
IS  - 3
SP  - 2125
VL  - 26
DO  - 10.2298/TSCI210216186V
ER  - 

@article{
author = "Veljić, Darko and Rakin, Marko and Sedmak, Aleksandar and Radović, Nenad A. and Međo, Bojan and Mrdak, Mihailo and Bajić, Darko",
year = "2022",
abstract = "The influence of friction stir welding parameters on thermo-mechanical behav-ior of the material during welding is analyzed. An aluminum alloy is considered (Al 2024 T351), and different rotating and welding speeds are applied. The finite element model consists of the working plate (Al alloy), backing plate and welding tool. The influence of the welding conditions on material behavior is taken into account the application of the Johnson-Cook material model. The rotation speed of the tool affects the results. If increased, it contributes to an increase of friction-gen-erated heat intensity. The other component of the generated heat, which stems from the plastic deformation of the material, is negligibly changed. When the welding speed, i.e. tool translation speed, is increased, the intensity of friction-generated heat decreases, while the heat generation due to plastic deforming is becoming more pronounced. Summed, this leads to rather small change of the total genera-tion. The changes of the heat generation influence both the temperature field and reaction force. Also, the inadequate selection of welding parameters resulted in occurrence of the defects (pores) in the model.",
publisher = "Univerzitet u Beogradu - Institut za nuklearne nauke Vinča, Beograd",
journal = "Thermal Science",
title = "Thermo-mechanical analysis of linear welding stage in friction stir welding influence of welding parameters",
pages = "2134-2125",
number = "3",
volume = "26",
doi = "10.2298/TSCI210216186V"
}

Veljić, D., Rakin, M., Sedmak, A., Radović, N. A., Međo, B., Mrdak, M.,& Bajić, D.. (2022). Thermo-mechanical analysis of linear welding stage in friction stir welding influence of welding parameters. in Thermal Science
Univerzitet u Beogradu - Institut za nuklearne nauke Vinča, Beograd., 26(3), 2125-2134.
https://doi.org/10.2298/TSCI210216186V

Veljić D, Rakin M, Sedmak A, Radović NA, Međo B, Mrdak M, Bajić D. Thermo-mechanical analysis of linear welding stage in friction stir welding influence of welding parameters. in Thermal Science. 2022;26(3):2125-2134.
doi:10.2298/TSCI210216186V .

Veljić, Darko, Rakin, Marko, Sedmak, Aleksandar, Radović, Nenad A., Međo, Bojan, Mrdak, Mihailo, Bajić, Darko, "Thermo-mechanical analysis of linear welding stage in friction stir welding influence of welding parameters" in Thermal Science, 26, no. 3 (2022):2125-2134,
https://doi.org/10.2298/TSCI210216186V . .

TY  - JOUR
AU  - Tanasković, Jovan
AU  - Franklin, F.
AU  - Radović, Nenad A.
AU  - Zivić, Fatima
PY  - 2022
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/3826
AB  - The subject of this paper is the structural design of a safety steel device that is located between the standard wagon buffer and the collision energy absorber. The safety steel device is a sacrifical part able to withstand normal operating loads from the buffer across the absorber to the vehicle bearing structure without any permanent deformation, but experiences fully controlled fracture when the load exceeds the defined threshold. Following fracture, the load path is through the energy absorber. The sacrificial part is a ring made from quenched and tempered low alloyed steel with precisely defined heat treatment and material properties. Experimental investigations of scaled samples were performed to get mechanical characteristics of the material and geometry. A full-scale prototype of the safety device was produced, and final quasi-static and dynamic experiments were conducted. The results validate the anaytical predictions, and thus validate the design method used here for dimensioning the safety steel device.
PB  - Budapest Tech Polytechnical Institution
T2  - Acta Polytechnica Hungarica
T1  - Structural Design of Safety Steel Device of Railway Vehicles Through Analytical and Experimental Investigations
EP  - 33
IS  - 6
SP  - 21
VL  - 19
UR  - https://hdl.handle.net/21.15107/rcub_machinery_3826
ER  - 

@article{
author = "Tanasković, Jovan and Franklin, F. and Radović, Nenad A. and Zivić, Fatima",
year = "2022",
abstract = "The subject of this paper is the structural design of a safety steel device that is located between the standard wagon buffer and the collision energy absorber. The safety steel device is a sacrifical part able to withstand normal operating loads from the buffer across the absorber to the vehicle bearing structure without any permanent deformation, but experiences fully controlled fracture when the load exceeds the defined threshold. Following fracture, the load path is through the energy absorber. The sacrificial part is a ring made from quenched and tempered low alloyed steel with precisely defined heat treatment and material properties. Experimental investigations of scaled samples were performed to get mechanical characteristics of the material and geometry. A full-scale prototype of the safety device was produced, and final quasi-static and dynamic experiments were conducted. The results validate the anaytical predictions, and thus validate the design method used here for dimensioning the safety steel device.",
publisher = "Budapest Tech Polytechnical Institution",
journal = "Acta Polytechnica Hungarica",
title = "Structural Design of Safety Steel Device of Railway Vehicles Through Analytical and Experimental Investigations",
pages = "33-21",
number = "6",
volume = "19",
url = "https://hdl.handle.net/21.15107/rcub_machinery_3826"
}

Tanasković, J., Franklin, F., Radović, N. A.,& Zivić, F.. (2022). Structural Design of Safety Steel Device of Railway Vehicles Through Analytical and Experimental Investigations. in Acta Polytechnica Hungarica
Budapest Tech Polytechnical Institution., 19(6), 21-33.
https://hdl.handle.net/21.15107/rcub_machinery_3826

Tanasković J, Franklin F, Radović NA, Zivić F. Structural Design of Safety Steel Device of Railway Vehicles Through Analytical and Experimental Investigations. in Acta Polytechnica Hungarica. 2022;19(6):21-33.
https://hdl.handle.net/21.15107/rcub_machinery_3826 .

Tanasković, Jovan, Franklin, F., Radović, Nenad A., Zivić, Fatima, "Structural Design of Safety Steel Device of Railway Vehicles Through Analytical and Experimental Investigations" in Acta Polytechnica Hungarica, 19, no. 6 (2022):21-33,
https://hdl.handle.net/21.15107/rcub_machinery_3826 .

TY  - JOUR
AU  - Vuksić-Popović, M.
AU  - Tanasković, Jovan
AU  - Glisić, D.
AU  - Radović, Nenad A.
AU  - Franklin, F. J.
PY  - 2021
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/3525
AB  - Two modes of failure are analysed for coupling links, the mechanical connections that transmit traction forces between vehicles along the length of a train. Coupling links are designed to withstand the dynamic loads in normal operation but may break if applied loads exceed safe operating limits. Fractography of two failed links revealed that one had failed through brittle fracture, and one through ductile fracture. Metallography indicated that one sample was hardened and tempered with typical tempered martensite microstructure and the other was normalized with a ferrite-pearlite microstructure. A numerical model of a coupling link is developed and validated against experimental data. Results indicate that the failed links experienced loads above the permitted limit.
PB  - Pergamon-Elsevier Science Ltd, Oxford
T2  - Engineering Failure Analysis
T1  - Experimental and numerical research on the failure of railway vehicles coupling links
VL  - 127
DO  - 10.1016/j.engfailanal.2021.105497
ER  - 

@article{
author = "Vuksić-Popović, M. and Tanasković, Jovan and Glisić, D. and Radović, Nenad A. and Franklin, F. J.",
year = "2021",
abstract = "Two modes of failure are analysed for coupling links, the mechanical connections that transmit traction forces between vehicles along the length of a train. Coupling links are designed to withstand the dynamic loads in normal operation but may break if applied loads exceed safe operating limits. Fractography of two failed links revealed that one had failed through brittle fracture, and one through ductile fracture. Metallography indicated that one sample was hardened and tempered with typical tempered martensite microstructure and the other was normalized with a ferrite-pearlite microstructure. A numerical model of a coupling link is developed and validated against experimental data. Results indicate that the failed links experienced loads above the permitted limit.",
publisher = "Pergamon-Elsevier Science Ltd, Oxford",
journal = "Engineering Failure Analysis",
title = "Experimental and numerical research on the failure of railway vehicles coupling links",
volume = "127",
doi = "10.1016/j.engfailanal.2021.105497"
}

Vuksić-Popović, M., Tanasković, J., Glisić, D., Radović, N. A.,& Franklin, F. J.. (2021). Experimental and numerical research on the failure of railway vehicles coupling links. in Engineering Failure Analysis
Pergamon-Elsevier Science Ltd, Oxford., 127.
https://doi.org/10.1016/j.engfailanal.2021.105497

Vuksić-Popović M, Tanasković J, Glisić D, Radović NA, Franklin FJ. Experimental and numerical research on the failure of railway vehicles coupling links. in Engineering Failure Analysis. 2021;127.
doi:10.1016/j.engfailanal.2021.105497 .

Vuksić-Popović, M., Tanasković, Jovan, Glisić, D., Radović, Nenad A., Franklin, F. J., "Experimental and numerical research on the failure of railway vehicles coupling links" in Engineering Failure Analysis, 127 (2021),
https://doi.org/10.1016/j.engfailanal.2021.105497 . .

TY  - PAT
AU  - Tanasković, Jovan
AU  - Dragičević, Aleksandra
AU  - Radović, Nenad
AU  - Balać, Martina
PY  - 2019
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/5722
AB  - Tehnički problem koji se rešava ovim pronalaskom je automatsko odbravljivanje i zabravljivanje klizne grede poluprikolice, čime se omogućava operateru-vozaču vučenog vozila da tovarnu površinu u svakom trenutku, prema potrebi, može povećati (produžiti) ili smanjiti (skratiti) daljinskom komandom.
PB  - Beograd :  Zavod za intelektualnu svojinu
T2  - Reg. br.: 1609 U1, Br. reš.: 2019/9618 04.06.2019., Datum objavljivanja i broj službenog glasila priznatog prava: (U1) 28.06.2019. 6/2019
T1  - Uređaj za fiksiranje položaja klizne grede – locking device for position fixing of the sliding beam
UR  - https://hdl.handle.net/21.15107/rcub_machinery_5722
ER  - 

@misc{
author = "Tanasković, Jovan and Dragičević, Aleksandra and Radović, Nenad and Balać, Martina",
year = "2019",
abstract = "Tehnički problem koji se rešava ovim pronalaskom je automatsko odbravljivanje i zabravljivanje klizne grede poluprikolice, čime se omogućava operateru-vozaču vučenog vozila da tovarnu površinu u svakom trenutku, prema potrebi, može povećati (produžiti) ili smanjiti (skratiti) daljinskom komandom.",
publisher = "Beograd :  Zavod za intelektualnu svojinu",
journal = "Reg. br.: 1609 U1, Br. reš.: 2019/9618 04.06.2019., Datum objavljivanja i broj službenog glasila priznatog prava: (U1) 28.06.2019. 6/2019",
title = "Uređaj za fiksiranje položaja klizne grede – locking device for position fixing of the sliding beam",
url = "https://hdl.handle.net/21.15107/rcub_machinery_5722"
}

Tanasković, J., Dragičević, A., Radović, N.,& Balać, M.. (2019). Uređaj za fiksiranje položaja klizne grede – locking device for position fixing of the sliding beam. in Reg. br.: 1609 U1, Br. reš.: 2019/9618 04.06.2019., Datum objavljivanja i broj službenog glasila priznatog prava: (U1) 28.06.2019. 6/2019
Beograd :  Zavod za intelektualnu svojinu..
https://hdl.handle.net/21.15107/rcub_machinery_5722

Tanasković J, Dragičević A, Radović N, Balać M. Uređaj za fiksiranje položaja klizne grede – locking device for position fixing of the sliding beam. in Reg. br.: 1609 U1, Br. reš.: 2019/9618 04.06.2019., Datum objavljivanja i broj službenog glasila priznatog prava: (U1) 28.06.2019. 6/2019. 2019;.
https://hdl.handle.net/21.15107/rcub_machinery_5722 .

Tanasković, Jovan, Dragičević, Aleksandra, Radović, Nenad, Balać, Martina, "Uređaj za fiksiranje položaja klizne grede – locking device for position fixing of the sliding beam" in Reg. br.: 1609 U1, Br. reš.: 2019/9618 04.06.2019., Datum objavljivanja i broj službenog glasila priznatog prava: (U1) 28.06.2019. 6/2019 (2019),
https://hdl.handle.net/21.15107/rcub_machinery_5722 .

TY  - GEN
AU  - Tanasković, Jovan
AU  - Lučanin, Vojkan
AU  - Radović, Nenad
AU  - Milković, Dragan
PY  - 2016
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/6021
AB  - Tehničko rešenje je primenjivo u industriji šinskih vozila. Može se implementirati u konstrukciju tokom projektovanja-proizvodnje novih i modernizacije postojećih putničkih i teretnih vagona. Varijacijom klјučnih parametara apsorpcionih  elemenata, u cilјu absorbovanja zahtevane količine kinetičke energije sudara, kombinovani apsorber se može ugraditi na lokomotivama, tramvajima i elektro-motornim vozovima. Kombinovani apsorber se može koristiti i u ostalim granama saobraćajne industrije i industrije građevinskih mašina. Apsorber ima zadatak da apsorbuje definisani-projektovani deo kinetičke energije sudara i da na taj način u što većoj meri redukuje opterećenja koja se prenosi na središnji deo noseće strukture vagona. Korišćenjem elemenata ovog tipa direktno se utiče na povećanje bezbednosti putnika, robe i vozila. Modularna konstrukcija kombinovanog apsorbera omogućava brzu i jednostavnu ugradnju novih i zamenu istrošenih elemenata, što znatno skraćuje vreme isklјučenja vozila iz saobraćaja, u poređenju sa vremenom potrebnim za sanaciju nastalih šteta tokom sudara na železničkim vozilima koja nisu opremlјena elementima pasivne bezbednosti. Kombinovani proces apsorpcije energije je razvijen u cilјu potpunog iskorišćenja materijala cevi, povećanja apsorpcione moći i dobijanja kompaktnih dimenzija apsorbera.
PB  - Odluka Nastavno-naučnog veća Mašinskog fakulteta br. 240/3 od 18.03.2016.
T2  - Univerzitet u Beogradu Mašinski fakultet
T1  - Apsorpcija kinetičke energije sudara korišćenjem kombinovanog postupka sužavanje-gužvanje cevi
UR  - https://hdl.handle.net/21.15107/rcub_machinery_6021
ER  - 

@misc{
author = "Tanasković, Jovan and Lučanin, Vojkan and Radović, Nenad and Milković, Dragan",
year = "2016",
abstract = "Tehničko rešenje je primenjivo u industriji šinskih vozila. Može se implementirati u konstrukciju tokom projektovanja-proizvodnje novih i modernizacije postojećih putničkih i teretnih vagona. Varijacijom klјučnih parametara apsorpcionih  elemenata, u cilјu absorbovanja zahtevane količine kinetičke energije sudara, kombinovani apsorber se može ugraditi na lokomotivama, tramvajima i elektro-motornim vozovima. Kombinovani apsorber se može koristiti i u ostalim granama saobraćajne industrije i industrije građevinskih mašina. Apsorber ima zadatak da apsorbuje definisani-projektovani deo kinetičke energije sudara i da na taj način u što većoj meri redukuje opterećenja koja se prenosi na središnji deo noseće strukture vagona. Korišćenjem elemenata ovog tipa direktno se utiče na povećanje bezbednosti putnika, robe i vozila. Modularna konstrukcija kombinovanog apsorbera omogućava brzu i jednostavnu ugradnju novih i zamenu istrošenih elemenata, što znatno skraćuje vreme isklјučenja vozila iz saobraćaja, u poređenju sa vremenom potrebnim za sanaciju nastalih šteta tokom sudara na železničkim vozilima koja nisu opremlјena elementima pasivne bezbednosti. Kombinovani proces apsorpcije energije je razvijen u cilјu potpunog iskorišćenja materijala cevi, povećanja apsorpcione moći i dobijanja kompaktnih dimenzija apsorbera.",
publisher = "Odluka Nastavno-naučnog veća Mašinskog fakulteta br. 240/3 od 18.03.2016.",
journal = "Univerzitet u Beogradu Mašinski fakultet",
title = "Apsorpcija kinetičke energije sudara korišćenjem kombinovanog postupka sužavanje-gužvanje cevi",
url = "https://hdl.handle.net/21.15107/rcub_machinery_6021"
}

Tanasković, J., Lučanin, V., Radović, N.,& Milković, D.. (2016). Apsorpcija kinetičke energije sudara korišćenjem kombinovanog postupka sužavanje-gužvanje cevi. in Univerzitet u Beogradu Mašinski fakultet
Odluka Nastavno-naučnog veća Mašinskog fakulteta br. 240/3 od 18.03.2016...
https://hdl.handle.net/21.15107/rcub_machinery_6021

Tanasković J, Lučanin V, Radović N, Milković D. Apsorpcija kinetičke energije sudara korišćenjem kombinovanog postupka sužavanje-gužvanje cevi. in Univerzitet u Beogradu Mašinski fakultet. 2016;.
https://hdl.handle.net/21.15107/rcub_machinery_6021 .

Tanasković, Jovan, Lučanin, Vojkan, Radović, Nenad, Milković, Dragan, "Apsorpcija kinetičke energije sudara korišćenjem kombinovanog postupka sužavanje-gužvanje cevi" in Univerzitet u Beogradu Mašinski fakultet (2016),
https://hdl.handle.net/21.15107/rcub_machinery_6021 .

TY  - JOUR
AU  - Hutli, Ezddin
AU  - Nedeljković, Miloš
AU  - Bonyar, Attila
AU  - Radović, Nenad A.
AU  - Llić, Vojislav
AU  - Debeljković, Aleksandra
PY  - 2016
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/2492
AB  - The aim of this paper is to investigate the possible application of the cavitation phenomenon as efficient method to modify the surface properties (e.g. the surface roughness) in the nano- and micro-levels. Aluminum alloy (AlSiMg) specimens were subjected to high speed submerged cavitating jets under various working conditions, for short time periods between 15 and 30 s. The force generated by the cavitating jet is employed to modify the surface roughness of the specimen. The target surface was analyzed with optical microscopy, white light interferometry, atomic force microscopy (AFM) and also with electrostatic force microscopy (EFM). The results show the possibility to use the cavitation bubbles as a nanofabrication method e.g. for shotless surface peening. With AFM, the deformation mechanism and the formation of planar or wavy slip were also investigated. EFM shows that the changes in the surface roughness also have a strong influence on, the electrostatic field above a biased sample.
PB  - Elsevier Sci Ltd, Oxford
T2  - Tribology International
T1  - The ability of using the cavitation phenomenon as a tool to modify the surface characteristics in micro- and in nano-level
EP  - 97
SP  - 88
VL  - 101
DO  - 10.1016/j.triboint.2016.04.006
ER  - 

@article{
author = "Hutli, Ezddin and Nedeljković, Miloš and Bonyar, Attila and Radović, Nenad A. and Llić, Vojislav and Debeljković, Aleksandra",
year = "2016",
abstract = "The aim of this paper is to investigate the possible application of the cavitation phenomenon as efficient method to modify the surface properties (e.g. the surface roughness) in the nano- and micro-levels. Aluminum alloy (AlSiMg) specimens were subjected to high speed submerged cavitating jets under various working conditions, for short time periods between 15 and 30 s. The force generated by the cavitating jet is employed to modify the surface roughness of the specimen. The target surface was analyzed with optical microscopy, white light interferometry, atomic force microscopy (AFM) and also with electrostatic force microscopy (EFM). The results show the possibility to use the cavitation bubbles as a nanofabrication method e.g. for shotless surface peening. With AFM, the deformation mechanism and the formation of planar or wavy slip were also investigated. EFM shows that the changes in the surface roughness also have a strong influence on, the electrostatic field above a biased sample.",
publisher = "Elsevier Sci Ltd, Oxford",
journal = "Tribology International",
title = "The ability of using the cavitation phenomenon as a tool to modify the surface characteristics in micro- and in nano-level",
pages = "97-88",
volume = "101",
doi = "10.1016/j.triboint.2016.04.006"
}

Hutli, E., Nedeljković, M., Bonyar, A., Radović, N. A., Llić, V.,& Debeljković, A.. (2016). The ability of using the cavitation phenomenon as a tool to modify the surface characteristics in micro- and in nano-level. in Tribology International
Elsevier Sci Ltd, Oxford., 101, 88-97.
https://doi.org/10.1016/j.triboint.2016.04.006

Hutli E, Nedeljković M, Bonyar A, Radović NA, Llić V, Debeljković A. The ability of using the cavitation phenomenon as a tool to modify the surface characteristics in micro- and in nano-level. in Tribology International. 2016;101:88-97.
doi:10.1016/j.triboint.2016.04.006 .

Hutli, Ezddin, Nedeljković, Miloš, Bonyar, Attila, Radović, Nenad A., Llić, Vojislav, Debeljković, Aleksandra, "The ability of using the cavitation phenomenon as a tool to modify the surface characteristics in micro- and in nano-level" in Tribology International, 101 (2016):88-97,
https://doi.org/10.1016/j.triboint.2016.04.006 . .

TY  - JOUR
AU  - Hutli, Ezddin
AU  - Nedeljković, Miloš
AU  - Radović, Nenad A.
AU  - Bonyar, Attila
PY  - 2016
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/2497
AB  - In order to accurately and reliably evaluate the cavitation erosion resistance of materials using a cavitating jet generator, the effects of the hydrodynamic parameters and the nozzle geometry on the erosion process were investigated. Since the behaviour of a high speed submerged cavitating jet is also depending on the working conditions; their influence is also discussed based on the evaluation of cavitation erosion process. The erosion rate was used as an indicator for cavitating jet behaviour. Specimens of commercial purity copper were subjected to high speed submerged cavitating jets under different initial conditions, for certain time periods. The force generated by jet cavitation is employed to initiate the erosion in surface. The tested specimens were investigated with a digital optical microscope and a profilometer. It was found that erosion becomes more pronounced with decreasing cavitation numbers, as well as with increasing exit jet velocities. The nozzle configuration and hydrodynamic parameters have strong influences on the erosion rate, eroded area and depth of erosion. A comparison between the obtained results explains some of the mechanisms involved in cavitation and erosion processes and their relation to the tested parameters. Mathematical expressions which combine these parameters with the erosion rate are obtained. These parameters are very important in order to control the cavitation as a phenomenon and also to control the performance of the cavitating jet generator.
PB  - Pergamon-Elsevier Science Ltd, Oxford
T2  - International Journal of Multiphase Flow
T1  - The relation between the high speed submerged cavitating jet behaviour and the cavitation erosion process
EP  - 38
SP  - 27
VL  - 83
DO  - 10.1016/j.ijmultiphaseflow.2016.03.005
ER  - 

@article{
author = "Hutli, Ezddin and Nedeljković, Miloš and Radović, Nenad A. and Bonyar, Attila",
year = "2016",
abstract = "In order to accurately and reliably evaluate the cavitation erosion resistance of materials using a cavitating jet generator, the effects of the hydrodynamic parameters and the nozzle geometry on the erosion process were investigated. Since the behaviour of a high speed submerged cavitating jet is also depending on the working conditions; their influence is also discussed based on the evaluation of cavitation erosion process. The erosion rate was used as an indicator for cavitating jet behaviour. Specimens of commercial purity copper were subjected to high speed submerged cavitating jets under different initial conditions, for certain time periods. The force generated by jet cavitation is employed to initiate the erosion in surface. The tested specimens were investigated with a digital optical microscope and a profilometer. It was found that erosion becomes more pronounced with decreasing cavitation numbers, as well as with increasing exit jet velocities. The nozzle configuration and hydrodynamic parameters have strong influences on the erosion rate, eroded area and depth of erosion. A comparison between the obtained results explains some of the mechanisms involved in cavitation and erosion processes and their relation to the tested parameters. Mathematical expressions which combine these parameters with the erosion rate are obtained. These parameters are very important in order to control the cavitation as a phenomenon and also to control the performance of the cavitating jet generator.",
publisher = "Pergamon-Elsevier Science Ltd, Oxford",
journal = "International Journal of Multiphase Flow",
title = "The relation between the high speed submerged cavitating jet behaviour and the cavitation erosion process",
pages = "38-27",
volume = "83",
doi = "10.1016/j.ijmultiphaseflow.2016.03.005"
}

Hutli, E., Nedeljković, M., Radović, N. A.,& Bonyar, A.. (2016). The relation between the high speed submerged cavitating jet behaviour and the cavitation erosion process. in International Journal of Multiphase Flow
Pergamon-Elsevier Science Ltd, Oxford., 83, 27-38.
https://doi.org/10.1016/j.ijmultiphaseflow.2016.03.005

Hutli E, Nedeljković M, Radović NA, Bonyar A. The relation between the high speed submerged cavitating jet behaviour and the cavitation erosion process. in International Journal of Multiphase Flow. 2016;83:27-38.
doi:10.1016/j.ijmultiphaseflow.2016.03.005 .

Hutli, Ezddin, Nedeljković, Miloš, Radović, Nenad A., Bonyar, Attila, "The relation between the high speed submerged cavitating jet behaviour and the cavitation erosion process" in International Journal of Multiphase Flow, 83 (2016):27-38,
https://doi.org/10.1016/j.ijmultiphaseflow.2016.03.005 . .

TY  - JOUR
AU  - Murariu, Alin
AU  - Veljić, Darko
AU  - Barjaktarević, Dragana R.
AU  - Rakin, Marko
AU  - Radović, Nenad A.
AU  - Sedmak, Aleksandar
AU  - Djoković, Jelena M.
PY  - 2016
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/2300
AB  - The heat generated during friction stir welding process depends on plastic deformation of the material and friction between the tool and the material. In this work, heat generation is analysed with respect to the material velocity around the tool in Al alloy Al2024-T351 plate. The slip rate of the tool relative to the workpiece material is related to the frictional heat generated. The material velocity, on the other hand, is related to the heat generated by plastic deformation. During the welding process, the slippage is the most pronounced on the front part of the tool shoulder. Also, it is higher on the retreating side than on the advancing side. Slip rate in the zone around the tool pin has very low values, almost negligible. In this zone, the heat generation from friction is very low, because the material is in paste-like state and subjected to intensive plastic deformation. The material flow velocity around the pin is higher in the zone around the root of the pin. In the radial direction, this quantity increases from the pin to the periphery of the tool shoulder.
PB  - Univerzitet u Beogradu - Institut za nuklearne nauke Vinča, Beograd
T2  - Thermal Science
T1  - Influence of material velocity on heat generation during linear welding stage of friction stir welding
EP  - 1701
IS  - 5
SP  - 1693
VL  - 20
DO  - 10.2298/TSCI150904217M
ER  - 

@article{
author = "Murariu, Alin and Veljić, Darko and Barjaktarević, Dragana R. and Rakin, Marko and Radović, Nenad A. and Sedmak, Aleksandar and Djoković, Jelena M.",
year = "2016",
abstract = "The heat generated during friction stir welding process depends on plastic deformation of the material and friction between the tool and the material. In this work, heat generation is analysed with respect to the material velocity around the tool in Al alloy Al2024-T351 plate. The slip rate of the tool relative to the workpiece material is related to the frictional heat generated. The material velocity, on the other hand, is related to the heat generated by plastic deformation. During the welding process, the slippage is the most pronounced on the front part of the tool shoulder. Also, it is higher on the retreating side than on the advancing side. Slip rate in the zone around the tool pin has very low values, almost negligible. In this zone, the heat generation from friction is very low, because the material is in paste-like state and subjected to intensive plastic deformation. The material flow velocity around the pin is higher in the zone around the root of the pin. In the radial direction, this quantity increases from the pin to the periphery of the tool shoulder.",
publisher = "Univerzitet u Beogradu - Institut za nuklearne nauke Vinča, Beograd",
journal = "Thermal Science",
title = "Influence of material velocity on heat generation during linear welding stage of friction stir welding",
pages = "1701-1693",
number = "5",
volume = "20",
doi = "10.2298/TSCI150904217M"
}

Murariu, A., Veljić, D., Barjaktarević, D. R., Rakin, M., Radović, N. A., Sedmak, A.,& Djoković, J. M.. (2016). Influence of material velocity on heat generation during linear welding stage of friction stir welding. in Thermal Science
Univerzitet u Beogradu - Institut za nuklearne nauke Vinča, Beograd., 20(5), 1693-1701.
https://doi.org/10.2298/TSCI150904217M

Murariu A, Veljić D, Barjaktarević DR, Rakin M, Radović NA, Sedmak A, Djoković JM. Influence of material velocity on heat generation during linear welding stage of friction stir welding. in Thermal Science. 2016;20(5):1693-1701.
doi:10.2298/TSCI150904217M .

Murariu, Alin, Veljić, Darko, Barjaktarević, Dragana R., Rakin, Marko, Radović, Nenad A., Sedmak, Aleksandar, Djoković, Jelena M., "Influence of material velocity on heat generation during linear welding stage of friction stir welding" in Thermal Science, 20, no. 5 (2016):1693-1701,
https://doi.org/10.2298/TSCI150904217M . .

TY  - JOUR
AU  - Veljić, Darko
AU  - Sedmak, Aleksandar
AU  - Rakin, Marko
AU  - Radović, Nenad A.
AU  - Popović, N.
AU  - Dascau, Horia
AU  - Bajić, Nikola
PY  - 2015
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/2169
AB  - In modern industrial production, every manufacturing and assembly process should be assessed with respect to its influence on the environment. For a company that invests in a new process, a careful analysis of HSE problems (Health, Safety and Environment) is very important. Friction stir welding (FSW) process offers numerous advantages regarding health protection, environmental effects and work safety in comparison with other welding procedures, such as arc welding. Arc welding produces a broad spec-trum of UV radiation, harmful for human health (skin, eyes). Exposure to this radiation without an adequate protection can lead to severe injuries. If appropriate protective measures are undertaken, the welder can easily be exposed to heat injuries. This is especially pronounced for arc welding of aluminium alloys, because high material conductivity of Al requires a high-energy arc, and also because its surface has more pronounced reflection than steel. This work deals with the FSW welding process and its advantages in comparison with arc welding processes with respect to health protection, environmental problems and work safety.
PB  - Institut za ispitivanje materijala, Beograd
T2  - Structural Integrity and Life
T1  - Advantages of friction stir welding over arc welding with respect to health and environmental protection and work safety [Prednosti zavarivanja trenjem sa mešanjem u odnosu na elektrolučno zavarivanje - Zaštita zdravlja i životne sredine i bezbednost na r
EP  - 116
IS  - 2
SP  - 111
VL  - 15
UR  - https://hdl.handle.net/21.15107/rcub_machinery_2169
ER  - 

@article{
author = "Veljić, Darko and Sedmak, Aleksandar and Rakin, Marko and Radović, Nenad A. and Popović, N. and Dascau, Horia and Bajić, Nikola",
year = "2015",
abstract = "In modern industrial production, every manufacturing and assembly process should be assessed with respect to its influence on the environment. For a company that invests in a new process, a careful analysis of HSE problems (Health, Safety and Environment) is very important. Friction stir welding (FSW) process offers numerous advantages regarding health protection, environmental effects and work safety in comparison with other welding procedures, such as arc welding. Arc welding produces a broad spec-trum of UV radiation, harmful for human health (skin, eyes). Exposure to this radiation without an adequate protection can lead to severe injuries. If appropriate protective measures are undertaken, the welder can easily be exposed to heat injuries. This is especially pronounced for arc welding of aluminium alloys, because high material conductivity of Al requires a high-energy arc, and also because its surface has more pronounced reflection than steel. This work deals with the FSW welding process and its advantages in comparison with arc welding processes with respect to health protection, environmental problems and work safety.",
publisher = "Institut za ispitivanje materijala, Beograd",
journal = "Structural Integrity and Life",
title = "Advantages of friction stir welding over arc welding with respect to health and environmental protection and work safety [Prednosti zavarivanja trenjem sa mešanjem u odnosu na elektrolučno zavarivanje - Zaštita zdravlja i životne sredine i bezbednost na r",
pages = "116-111",
number = "2",
volume = "15",
url = "https://hdl.handle.net/21.15107/rcub_machinery_2169"
}

Veljić, D., Sedmak, A., Rakin, M., Radović, N. A., Popović, N., Dascau, H.,& Bajić, N.. (2015). Advantages of friction stir welding over arc welding with respect to health and environmental protection and work safety [Prednosti zavarivanja trenjem sa mešanjem u odnosu na elektrolučno zavarivanje - Zaštita zdravlja i životne sredine i bezbednost na r. in Structural Integrity and Life
Institut za ispitivanje materijala, Beograd., 15(2), 111-116.
https://hdl.handle.net/21.15107/rcub_machinery_2169

Veljić D, Sedmak A, Rakin M, Radović NA, Popović N, Dascau H, Bajić N. Advantages of friction stir welding over arc welding with respect to health and environmental protection and work safety [Prednosti zavarivanja trenjem sa mešanjem u odnosu na elektrolučno zavarivanje - Zaštita zdravlja i životne sredine i bezbednost na r. in Structural Integrity and Life. 2015;15(2):111-116.
https://hdl.handle.net/21.15107/rcub_machinery_2169 .

Veljić, Darko, Sedmak, Aleksandar, Rakin, Marko, Radović, Nenad A., Popović, N., Dascau, Horia, Bajić, Nikola, "Advantages of friction stir welding over arc welding with respect to health and environmental protection and work safety [Prednosti zavarivanja trenjem sa mešanjem u odnosu na elektrolučno zavarivanje - Zaštita zdravlja i životne sredine i bezbednost na r" in Structural Integrity and Life, 15, no. 2 (2015):111-116,
https://hdl.handle.net/21.15107/rcub_machinery_2169 .

TY  - JOUR
AU  - Eramah, Abdsalam M.
AU  - Rakin, Marko
AU  - Veljić, Darko
AU  - Tadić, Srđan
AU  - Radović, Nenad A.
AU  - Zrilić, Milorad
AU  - Perović, Milenko M.
PY  - 2014
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/2021
AB  - The aim of this work is to analyse the process of friction stir welding (FSW) of 3 mm thick aluminium plates made of high strength aluminium alloy - 2024 T3, as well as to assess the mechanical properties of the produced joints. Friction Stir Welding is a modern procedure which enables joining of similar and dissimilar materials in the solid state, by the combined action of heat and mechanical work. This paper presents an analysis of the experimental results obtained by testing the butt welded joints. Tensile strength of the produced joints is assessed, as well as the distribution of hardness, micro-and macrostructure through the joints (in the base material, nugget, heat affected zone and thermo-mechanically affected zone). Different combinations of the tool rotation speed and the welding speed are used, and the dependence of the properties of the joints on these parameters of welding technology is determined.
PB  - Univerzitet u Beogradu - Institut za nuklearne nauke Vinča, Beograd
T2  - Thermal Science
T1  - Influence of friction stir welding parameters on properties of 2024 t3 aluminium alloy joints
EP  - S28
SP  - S21
VL  - 18
DO  - 10.2298/TSCI130307170E
ER  - 

@article{
author = "Eramah, Abdsalam M. and Rakin, Marko and Veljić, Darko and Tadić, Srđan and Radović, Nenad A. and Zrilić, Milorad and Perović, Milenko M.",
year = "2014",
abstract = "The aim of this work is to analyse the process of friction stir welding (FSW) of 3 mm thick aluminium plates made of high strength aluminium alloy - 2024 T3, as well as to assess the mechanical properties of the produced joints. Friction Stir Welding is a modern procedure which enables joining of similar and dissimilar materials in the solid state, by the combined action of heat and mechanical work. This paper presents an analysis of the experimental results obtained by testing the butt welded joints. Tensile strength of the produced joints is assessed, as well as the distribution of hardness, micro-and macrostructure through the joints (in the base material, nugget, heat affected zone and thermo-mechanically affected zone). Different combinations of the tool rotation speed and the welding speed are used, and the dependence of the properties of the joints on these parameters of welding technology is determined.",
publisher = "Univerzitet u Beogradu - Institut za nuklearne nauke Vinča, Beograd",
journal = "Thermal Science",
title = "Influence of friction stir welding parameters on properties of 2024 t3 aluminium alloy joints",
pages = "S28-S21",
volume = "18",
doi = "10.2298/TSCI130307170E"
}

Eramah, A. M., Rakin, M., Veljić, D., Tadić, S., Radović, N. A., Zrilić, M.,& Perović, M. M.. (2014). Influence of friction stir welding parameters on properties of 2024 t3 aluminium alloy joints. in Thermal Science
Univerzitet u Beogradu - Institut za nuklearne nauke Vinča, Beograd., 18, S21-S28.
https://doi.org/10.2298/TSCI130307170E

Eramah AM, Rakin M, Veljić D, Tadić S, Radović NA, Zrilić M, Perović MM. Influence of friction stir welding parameters on properties of 2024 t3 aluminium alloy joints. in Thermal Science. 2014;18:S21-S28.
doi:10.2298/TSCI130307170E .

Eramah, Abdsalam M., Rakin, Marko, Veljić, Darko, Tadić, Srđan, Radović, Nenad A., Zrilić, Milorad, Perović, Milenko M., "Influence of friction stir welding parameters on properties of 2024 t3 aluminium alloy joints" in Thermal Science, 18 (2014):S21-S28,
https://doi.org/10.2298/TSCI130307170E . .

TY  - JOUR
AU  - Veljić, Darko
AU  - Sedmak, Aleksandar
AU  - Rakin, Marko
AU  - Radović, Nenad A.
AU  - Bajić, Nikola
PY  - 2013
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/1613
AB  - Cilj rada je analiza promene vertikalne sile i temperature tokom procesa zavarivanja trenjem mešanjem (FSW) legura aluminijuma visoke čvrstoće (2024 T3). FSW postupak je složen nelinearan proces praćen velikim plastičnim deformacijama, visokim temperaturama i plastičnim tečenjem materijala u zoni zavarivanja. To je postupak spajanja materijala u tzv. čvrstoj fazi, kombinovanim delovanjem toplote i mehaničkog rada. Analiza promene sile i temperature tokom procesa zavarivanja omogućava bolje razumevanje i kontrolu samog procesa. U radu je analizirana i praćena promena sile u vertikalnom pravcu pomoću dinamometra i promena temperature na gornjoj površini radne ploče u blizini čela valjka alata pomoću termovizijske kamere.
AB  - The aim of this paper is to analyze changes of vertical force and temperature during friction stir welding process of high strength aluminum alloys (2024 T3). FSW process is a complex nonlinear process accompanied by large plastic deformation, high temperatures and plastic material flow in the welding zone. It is the procedure of material connecting in the so-called solid phase, through the combined action of heat and mechanical work. Analysis of force and temperature changes during the process of welding allows better understanding and control of the process. This paper analyzes the change of force in the vertical direction using a dynamometer and temperature changes on the upper surface of the working panel near the tops of the roller tool using thermal imaging cameras.
PB  - DUZS - Društvo za unapređivanje zavarivanja u Srbiji, Beograd
T2  - Zavarivanje i zavarene konstrukcije
T1  - Promena temperature i vertikalne sile tokom procesa zavarivanja trenjem mešanjem
T1  - Change of temperature and vertical force during friction stir welding
EP  - 59
IS  - 2
SP  - 53
VL  - 58
UR  - https://hdl.handle.net/21.15107/rcub_machinery_1613
ER  - 

@article{
author = "Veljić, Darko and Sedmak, Aleksandar and Rakin, Marko and Radović, Nenad A. and Bajić, Nikola",
year = "2013",
abstract = "Cilj rada je analiza promene vertikalne sile i temperature tokom procesa zavarivanja trenjem mešanjem (FSW) legura aluminijuma visoke čvrstoće (2024 T3). FSW postupak je složen nelinearan proces praćen velikim plastičnim deformacijama, visokim temperaturama i plastičnim tečenjem materijala u zoni zavarivanja. To je postupak spajanja materijala u tzv. čvrstoj fazi, kombinovanim delovanjem toplote i mehaničkog rada. Analiza promene sile i temperature tokom procesa zavarivanja omogućava bolje razumevanje i kontrolu samog procesa. U radu je analizirana i praćena promena sile u vertikalnom pravcu pomoću dinamometra i promena temperature na gornjoj površini radne ploče u blizini čela valjka alata pomoću termovizijske kamere., The aim of this paper is to analyze changes of vertical force and temperature during friction stir welding process of high strength aluminum alloys (2024 T3). FSW process is a complex nonlinear process accompanied by large plastic deformation, high temperatures and plastic material flow in the welding zone. It is the procedure of material connecting in the so-called solid phase, through the combined action of heat and mechanical work. Analysis of force and temperature changes during the process of welding allows better understanding and control of the process. This paper analyzes the change of force in the vertical direction using a dynamometer and temperature changes on the upper surface of the working panel near the tops of the roller tool using thermal imaging cameras.",
publisher = "DUZS - Društvo za unapređivanje zavarivanja u Srbiji, Beograd",
journal = "Zavarivanje i zavarene konstrukcije",
title = "Promena temperature i vertikalne sile tokom procesa zavarivanja trenjem mešanjem, Change of temperature and vertical force during friction stir welding",
pages = "59-53",
number = "2",
volume = "58",
url = "https://hdl.handle.net/21.15107/rcub_machinery_1613"
}

Veljić, D., Sedmak, A., Rakin, M., Radović, N. A.,& Bajić, N.. (2013). Promena temperature i vertikalne sile tokom procesa zavarivanja trenjem mešanjem. in Zavarivanje i zavarene konstrukcije
DUZS - Društvo za unapređivanje zavarivanja u Srbiji, Beograd., 58(2), 53-59.
https://hdl.handle.net/21.15107/rcub_machinery_1613

Veljić D, Sedmak A, Rakin M, Radović NA, Bajić N. Promena temperature i vertikalne sile tokom procesa zavarivanja trenjem mešanjem. in Zavarivanje i zavarene konstrukcije. 2013;58(2):53-59.
https://hdl.handle.net/21.15107/rcub_machinery_1613 .

Veljić, Darko, Sedmak, Aleksandar, Rakin, Marko, Radović, Nenad A., Bajić, Nikola, "Promena temperature i vertikalne sile tokom procesa zavarivanja trenjem mešanjem" in Zavarivanje i zavarene konstrukcije, 58, no. 2 (2013):53-59,
https://hdl.handle.net/21.15107/rcub_machinery_1613 .

TY  - JOUR
AU  - Hutli, Ezddin
AU  - Nedeljković, Miloš
AU  - Radović, Nenad A.
PY  - 2013
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/1701
AB  - The aim of this paper is to establish a possible application of the cavitation phenomenon as an efficient method to modify surface properties at the nano and micro levels. Commercial-purity copper was subjected to high submerged cavitating jets under different initial conditions, for time periods between 15 and 1,800 s. The force generated by jet cavitation is employed to modify the surface roughness in the order of nano and micro scales. The target surface was analyzed with optical as well as scanning probe electron microscopy. The results showed the possibility to use cavitation bubbles to establish a nanofabrication method for the surface preparation, shoot-less surface peening (nano/micro level). Also, the cavitation is assumed to be one of the miniaturized testing methods that have to be developed to reliably measure mechanical properties in small dimensions and to identify the behavior caused by the size dependence. With optical, SEM, and atomic force microscopy observation techniques in this study, the deformation mechanism and the formation of planar or wavy slip were also studied. The results indicate that even at short exposure times, observed roughness having a characteristic "serpentine" configuration can be related to the start of the plastic deformation of the specimen surface. Longer exposure times inevitably result in a greater number of jetspecimen interactions leading to specimen fracture.
PB  - Springer, New York
T2  - Plasmonics
T1  - Nano- and Micro-Scale Surface Modification of FCC Metal Using High Submerged Cavitating Water Jet
EP  - 849
IS  - 2
SP  - 843
VL  - 8
DO  - 10.1007/s11468-013-9481-6
ER  - 

@article{
author = "Hutli, Ezddin and Nedeljković, Miloš and Radović, Nenad A.",
year = "2013",
abstract = "The aim of this paper is to establish a possible application of the cavitation phenomenon as an efficient method to modify surface properties at the nano and micro levels. Commercial-purity copper was subjected to high submerged cavitating jets under different initial conditions, for time periods between 15 and 1,800 s. The force generated by jet cavitation is employed to modify the surface roughness in the order of nano and micro scales. The target surface was analyzed with optical as well as scanning probe electron microscopy. The results showed the possibility to use cavitation bubbles to establish a nanofabrication method for the surface preparation, shoot-less surface peening (nano/micro level). Also, the cavitation is assumed to be one of the miniaturized testing methods that have to be developed to reliably measure mechanical properties in small dimensions and to identify the behavior caused by the size dependence. With optical, SEM, and atomic force microscopy observation techniques in this study, the deformation mechanism and the formation of planar or wavy slip were also studied. The results indicate that even at short exposure times, observed roughness having a characteristic "serpentine" configuration can be related to the start of the plastic deformation of the specimen surface. Longer exposure times inevitably result in a greater number of jetspecimen interactions leading to specimen fracture.",
publisher = "Springer, New York",
journal = "Plasmonics",
title = "Nano- and Micro-Scale Surface Modification of FCC Metal Using High Submerged Cavitating Water Jet",
pages = "849-843",
number = "2",
volume = "8",
doi = "10.1007/s11468-013-9481-6"
}

Hutli, E., Nedeljković, M.,& Radović, N. A.. (2013). Nano- and Micro-Scale Surface Modification of FCC Metal Using High Submerged Cavitating Water Jet. in Plasmonics
Springer, New York., 8(2), 843-849.
https://doi.org/10.1007/s11468-013-9481-6

Hutli E, Nedeljković M, Radović NA. Nano- and Micro-Scale Surface Modification of FCC Metal Using High Submerged Cavitating Water Jet. in Plasmonics. 2013;8(2):843-849.
doi:10.1007/s11468-013-9481-6 .

Hutli, Ezddin, Nedeljković, Miloš, Radović, Nenad A., "Nano- and Micro-Scale Surface Modification of FCC Metal Using High Submerged Cavitating Water Jet" in Plasmonics, 8, no. 2 (2013):843-849,
https://doi.org/10.1007/s11468-013-9481-6 . .

TY  - JOUR
AU  - Perović, Milenko M.
AU  - Veljić, Darko
AU  - Rakin, Marko
AU  - Radović, Nenad A.
AU  - Sedmak, Aleksandar
AU  - Bajić, Nikola
PY  - 2012
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/1606
AB  - This paper defines a set of welding parameters for the Friction-Stir Welding (FSW) of two forged panels of the alloy EN AW 7049A in a T652 temper and discusses the plunge stage of FSW using numerical modeling. This multi-component aluminum alloy is characterized by high strength, reduced plasticity and poor weldability. Observations of the macrostructure and microstructure clearly showed typical zones of a FSW joint and the appropriate grain sizes. The finest grains were observed within the nugget, while the coarsest grains are found to be in the HAZ. The ultimate tensile strength is 80.3 % of the parent material. A coupled thermo-mechanical model was developed to study the temperature fields and the plunge force of the alloy EN AW 7049A under different rotating speeds, (300, 400 and 500) r/min, during the FSW process of the plunge stage. A three-dimensional FE model has been developed in ABAQUS/Explicit using the arbitrary Lagrangian-Eulerian formulation, the Johnson-Cook material law and Coulomb's Law of Friction. Numerical results indicate that the maximum temperature in the FSW process can be increased with an increase in the rotational speed, which can be used to reduce the plunge force.
PB  - Institute of Metals and Technology
T2  - Materiali in Tehnologije
T1  - Friction-stir welding of high-strength aluminium alloys and a numerical simulation of the plunge stage
EP  - 221
IS  - 3
SP  - 215
VL  - 46
UR  - https://hdl.handle.net/21.15107/rcub_technorep_2012
ER  - 

@article{
author = "Perović, Milenko M. and Veljić, Darko and Rakin, Marko and Radović, Nenad A. and Sedmak, Aleksandar and Bajić, Nikola",
year = "2012",
abstract = "This paper defines a set of welding parameters for the Friction-Stir Welding (FSW) of two forged panels of the alloy EN AW 7049A in a T652 temper and discusses the plunge stage of FSW using numerical modeling. This multi-component aluminum alloy is characterized by high strength, reduced plasticity and poor weldability. Observations of the macrostructure and microstructure clearly showed typical zones of a FSW joint and the appropriate grain sizes. The finest grains were observed within the nugget, while the coarsest grains are found to be in the HAZ. The ultimate tensile strength is 80.3 % of the parent material. A coupled thermo-mechanical model was developed to study the temperature fields and the plunge force of the alloy EN AW 7049A under different rotating speeds, (300, 400 and 500) r/min, during the FSW process of the plunge stage. A three-dimensional FE model has been developed in ABAQUS/Explicit using the arbitrary Lagrangian-Eulerian formulation, the Johnson-Cook material law and Coulomb's Law of Friction. Numerical results indicate that the maximum temperature in the FSW process can be increased with an increase in the rotational speed, which can be used to reduce the plunge force.",
publisher = "Institute of Metals and Technology",
journal = "Materiali in Tehnologije",
title = "Friction-stir welding of high-strength aluminium alloys and a numerical simulation of the plunge stage",
pages = "221-215",
number = "3",
volume = "46",
url = "https://hdl.handle.net/21.15107/rcub_technorep_2012"
}

Perović, M. M., Veljić, D., Rakin, M., Radović, N. A., Sedmak, A.,& Bajić, N.. (2012). Friction-stir welding of high-strength aluminium alloys and a numerical simulation of the plunge stage. in Materiali in Tehnologije
Institute of Metals and Technology., 46(3), 215-221.
https://hdl.handle.net/21.15107/rcub_technorep_2012

Perović MM, Veljić D, Rakin M, Radović NA, Sedmak A, Bajić N. Friction-stir welding of high-strength aluminium alloys and a numerical simulation of the plunge stage. in Materiali in Tehnologije. 2012;46(3):215-221.
https://hdl.handle.net/21.15107/rcub_technorep_2012 .

Perović, Milenko M., Veljić, Darko, Rakin, Marko, Radović, Nenad A., Sedmak, Aleksandar, Bajić, Nikola, "Friction-stir welding of high-strength aluminium alloys and a numerical simulation of the plunge stage" in Materiali in Tehnologije, 46, no. 3 (2012):215-221,
https://hdl.handle.net/21.15107/rcub_technorep_2012 .

TY  - JOUR
AU  - Veljić, Darko
AU  - Radović, Nenad A.
AU  - Sedmak, Aleksandar
AU  - Perović, Milenko M.
PY  - 2010
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/1049
AB  - Cilj rada je osvajanje tehnologije zavarivanja aluminijumskih legura postupkom zavarivanja trenjem alatom (FSW). Zavarivanje trenjem alatom predstavlja jedan od najsavremenijih postupaka, sa velikom perspektivom dalje primene, pošto pruža najraznovrsnije mogućnosti za zavarivanje raznorodnih materijala. U radu su analizirani eksperimentalni rezultati su čeono zavarenih spojeva aluminijumskih ploča zavarenih postupkom zavarivanja trenjem alatom. Izvršeno je poređenje raspodele tvrdoće u zavarenom spoju u zavisnosti od parametara zavarivanja odnosno količine unete toplote u zoni zavarivanja, debljine ploča i tipa aluminijumske legure.
AB  - The objective of this paper is a development of welding technology of aluminium alloys by Friction Stir Welding (FSW). FSW is a very modern welding process with a great future use, primarily due to a variety of possible combinations of dissimilar materials to be welded. In this paper experimental results of butt welds for the friction stir welding of aluminium alloys are analyzed. A comparison hardness distribution in the welds was done considering welding parameters, that is the quantity of heat in the welding zone, panels thickness and aluminum alloy type.
PB  - DUZS - Društvo za unapređivanje zavarivanja u Srbiji, Beograd
T2  - Zavarivanje i zavarene konstrukcije
T1  - Tehnologija zavarivanja aluminijumskih legura postupkom zavarivanja trenjem alatom
T1  - Welding technology of aluminium alloys using friction stir welding
EP  - 20
IS  - 1
SP  - 13
VL  - 55
UR  - https://hdl.handle.net/21.15107/rcub_technorep_1647
ER  - 

@article{
author = "Veljić, Darko and Radović, Nenad A. and Sedmak, Aleksandar and Perović, Milenko M.",
year = "2010",
abstract = "Cilj rada je osvajanje tehnologije zavarivanja aluminijumskih legura postupkom zavarivanja trenjem alatom (FSW). Zavarivanje trenjem alatom predstavlja jedan od najsavremenijih postupaka, sa velikom perspektivom dalje primene, pošto pruža najraznovrsnije mogućnosti za zavarivanje raznorodnih materijala. U radu su analizirani eksperimentalni rezultati su čeono zavarenih spojeva aluminijumskih ploča zavarenih postupkom zavarivanja trenjem alatom. Izvršeno je poređenje raspodele tvrdoće u zavarenom spoju u zavisnosti od parametara zavarivanja odnosno količine unete toplote u zoni zavarivanja, debljine ploča i tipa aluminijumske legure., The objective of this paper is a development of welding technology of aluminium alloys by Friction Stir Welding (FSW). FSW is a very modern welding process with a great future use, primarily due to a variety of possible combinations of dissimilar materials to be welded. In this paper experimental results of butt welds for the friction stir welding of aluminium alloys are analyzed. A comparison hardness distribution in the welds was done considering welding parameters, that is the quantity of heat in the welding zone, panels thickness and aluminum alloy type.",
publisher = "DUZS - Društvo za unapređivanje zavarivanja u Srbiji, Beograd",
journal = "Zavarivanje i zavarene konstrukcije",
title = "Tehnologija zavarivanja aluminijumskih legura postupkom zavarivanja trenjem alatom, Welding technology of aluminium alloys using friction stir welding",
pages = "20-13",
number = "1",
volume = "55",
url = "https://hdl.handle.net/21.15107/rcub_technorep_1647"
}

Veljić, D., Radović, N. A., Sedmak, A.,& Perović, M. M.. (2010). Tehnologija zavarivanja aluminijumskih legura postupkom zavarivanja trenjem alatom. in Zavarivanje i zavarene konstrukcije
DUZS - Društvo za unapređivanje zavarivanja u Srbiji, Beograd., 55(1), 13-20.
https://hdl.handle.net/21.15107/rcub_technorep_1647

Veljić D, Radović NA, Sedmak A, Perović MM. Tehnologija zavarivanja aluminijumskih legura postupkom zavarivanja trenjem alatom. in Zavarivanje i zavarene konstrukcije. 2010;55(1):13-20.
https://hdl.handle.net/21.15107/rcub_technorep_1647 .

Veljić, Darko, Radović, Nenad A., Sedmak, Aleksandar, Perović, Milenko M., "Tehnologija zavarivanja aluminijumskih legura postupkom zavarivanja trenjem alatom" in Zavarivanje i zavarene konstrukcije, 55, no. 1 (2010):13-20,
https://hdl.handle.net/21.15107/rcub_technorep_1647 .

TY  - JOUR
AU  - Simić, Goran
AU  - Lučanin, Vojkan
AU  - Tanasković, Jovan
AU  - Radović, Nenad A.
PY  - 2009
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/888
PB  - Blackwell Publishing Inc.
T2  - Experimental Techniques
T1  - Experimental research of characteristics of shock absorbers of impact energy of passenger coaches
EP  - 35
IS  - 4
SP  - 29
VL  - 33
DO  - 10.1111/j.1747-1567.2008.00470.x
ER  - 

@article{
author = "Simić, Goran and Lučanin, Vojkan and Tanasković, Jovan and Radović, Nenad A.",
year = "2009",
publisher = "Blackwell Publishing Inc.",
journal = "Experimental Techniques",
title = "Experimental research of characteristics of shock absorbers of impact energy of passenger coaches",
pages = "35-29",
number = "4",
volume = "33",
doi = "10.1111/j.1747-1567.2008.00470.x"
}

Simić, G., Lučanin, V., Tanasković, J.,& Radović, N. A.. (2009). Experimental research of characteristics of shock absorbers of impact energy of passenger coaches. in Experimental Techniques
Blackwell Publishing Inc.., 33(4), 29-35.
https://doi.org/10.1111/j.1747-1567.2008.00470.x

Simić G, Lučanin V, Tanasković J, Radović NA. Experimental research of characteristics of shock absorbers of impact energy of passenger coaches. in Experimental Techniques. 2009;33(4):29-35.
doi:10.1111/j.1747-1567.2008.00470.x .

Simić, Goran, Lučanin, Vojkan, Tanasković, Jovan, Radović, Nenad A., "Experimental research of characteristics of shock absorbers of impact energy of passenger coaches" in Experimental Techniques, 33, no. 4 (2009):29-35,
https://doi.org/10.1111/j.1747-1567.2008.00470.x . .

TY  - JOUR
AU  - Hutli, Ezddin
AU  - Nedeljković, Miloš
AU  - Radović, Nenad A.
PY  - 2008
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/824
AB  - Experimental setup with a submerged cavitating jet has been used for the study of influences of material, exposure time and working fluid temperature on the erosion process. Each of the parameters has been varied separately, and the results of erosion are analyzed in detail. Additionally, comparison of experiments with nitrated and non-nitrated material has been made in order to study the enhancement (mostly reflected as the prolonged incubation time) of erosion resistance achieved by nitrating the specimen surface.
PB  - Springer, New York
T2  - Archive of Applied Mechanics
T1  - Mechanics of submerged jet cavitating action: material properties, exposure time and temperature effects on erosion
EP  - 341
IS  - 5
SP  - 329
VL  - 78
DO  - 10.1007/s00419-007-0163-8
ER  - 

@article{
author = "Hutli, Ezddin and Nedeljković, Miloš and Radović, Nenad A.",
year = "2008",
abstract = "Experimental setup with a submerged cavitating jet has been used for the study of influences of material, exposure time and working fluid temperature on the erosion process. Each of the parameters has been varied separately, and the results of erosion are analyzed in detail. Additionally, comparison of experiments with nitrated and non-nitrated material has been made in order to study the enhancement (mostly reflected as the prolonged incubation time) of erosion resistance achieved by nitrating the specimen surface.",
publisher = "Springer, New York",
journal = "Archive of Applied Mechanics",
title = "Mechanics of submerged jet cavitating action: material properties, exposure time and temperature effects on erosion",
pages = "341-329",
number = "5",
volume = "78",
doi = "10.1007/s00419-007-0163-8"
}

Hutli, E., Nedeljković, M.,& Radović, N. A.. (2008). Mechanics of submerged jet cavitating action: material properties, exposure time and temperature effects on erosion. in Archive of Applied Mechanics
Springer, New York., 78(5), 329-341.
https://doi.org/10.1007/s00419-007-0163-8

Hutli E, Nedeljković M, Radović NA. Mechanics of submerged jet cavitating action: material properties, exposure time and temperature effects on erosion. in Archive of Applied Mechanics. 2008;78(5):329-341.
doi:10.1007/s00419-007-0163-8 .

Hutli, Ezddin, Nedeljković, Miloš, Radović, Nenad A., "Mechanics of submerged jet cavitating action: material properties, exposure time and temperature effects on erosion" in Archive of Applied Mechanics, 78, no. 5 (2008):329-341,
https://doi.org/10.1007/s00419-007-0163-8 . .

TY  - JOUR
AU  - Tanasković, Jovan
AU  - Lučanin, Vojkan
AU  - Radović, Nenad A.
PY  - 2007
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/753
AB  - Development of shock absorbers is one of the necessary measures for passive protection of passenger coaches. The purpose of passive protection is to minimize the collision consequences for passengers. Present solutions are based on the use of elements with a special structure that absorb a large amount of collision kinetic energy through controlled plastic deformation, allowing transfer of a significantly smaller part to the supporting vehicle structure. The shock absorber developed in this work consisted of a low carbon seamless steel tube and ring fabricated from quench and tempered carbon steel. During collision, the seamless tube is compressed into a ring with a reduced diameter. Therefore, the aim of this work was to determine the actual properties of the absorber, by testing it in both low and high strain rate tests. Based on the measured and calculated compressing parameters and calculation, some modifications of the absorber are suggested. .
PB  - Savez inženjera metalurgije Srbije, Beograd
T2  - Metalurgija
T1  - Development of a collision energy absorber of a passenger train
EP  - 292
IS  - 4
SP  - 287
VL  - 13
UR  - https://hdl.handle.net/21.15107/rcub_technorep_1050
ER  - 

@article{
author = "Tanasković, Jovan and Lučanin, Vojkan and Radović, Nenad A.",
year = "2007",
abstract = "Development of shock absorbers is one of the necessary measures for passive protection of passenger coaches. The purpose of passive protection is to minimize the collision consequences for passengers. Present solutions are based on the use of elements with a special structure that absorb a large amount of collision kinetic energy through controlled plastic deformation, allowing transfer of a significantly smaller part to the supporting vehicle structure. The shock absorber developed in this work consisted of a low carbon seamless steel tube and ring fabricated from quench and tempered carbon steel. During collision, the seamless tube is compressed into a ring with a reduced diameter. Therefore, the aim of this work was to determine the actual properties of the absorber, by testing it in both low and high strain rate tests. Based on the measured and calculated compressing parameters and calculation, some modifications of the absorber are suggested. .",
publisher = "Savez inženjera metalurgije Srbije, Beograd",
journal = "Metalurgija",
title = "Development of a collision energy absorber of a passenger train",
pages = "292-287",
number = "4",
volume = "13",
url = "https://hdl.handle.net/21.15107/rcub_technorep_1050"
}

Tanasković, J., Lučanin, V.,& Radović, N. A.. (2007). Development of a collision energy absorber of a passenger train. in Metalurgija
Savez inženjera metalurgije Srbije, Beograd., 13(4), 287-292.
https://hdl.handle.net/21.15107/rcub_technorep_1050

Tanasković J, Lučanin V, Radović NA. Development of a collision energy absorber of a passenger train. in Metalurgija. 2007;13(4):287-292.
https://hdl.handle.net/21.15107/rcub_technorep_1050 .

Tanasković, Jovan, Lučanin, Vojkan, Radović, Nenad A., "Development of a collision energy absorber of a passenger train" in Metalurgija, 13, no. 4 (2007):287-292,
https://hdl.handle.net/21.15107/rcub_technorep_1050 .

TY  - CONF
AU  - Radović, Nenad
AU  - Radaković, Zoran
AU  - Đurović, Aleksandar
AU  - Sedmak, Stojan
AU  - Jandrlić, A.
AU  - Golubović, D.
AU  - Zrilić, Milorad
AU  - Prokić-Cvetković, Radica
AU  - Popović, Olivera
AU  - Milović, Ljubica
AU  - Rakin, Marko
AU  - Engh, E.
PY  - 2006
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/5400
C3  - Proc. of the 1st South-East European Welding Congress - Welding and joining technologies for a sustainable development and environment, Timisoara, Romania
T1  - Welders passport-program structure and application
EP  - 263
SP  - 260
UR  - https://hdl.handle.net/21.15107/rcub_machinery_5400
ER  - 

@conference{
author = "Radović, Nenad and Radaković, Zoran and Đurović, Aleksandar and Sedmak, Stojan and Jandrlić, A. and Golubović, D. and Zrilić, Milorad and Prokić-Cvetković, Radica and Popović, Olivera and Milović, Ljubica and Rakin, Marko and Engh, E.",
year = "2006",
journal = "Proc. of the 1st South-East European Welding Congress - Welding and joining technologies for a sustainable development and environment, Timisoara, Romania",
title = "Welders passport-program structure and application",
pages = "263-260",
url = "https://hdl.handle.net/21.15107/rcub_machinery_5400"
}

Radović, N., Radaković, Z., Đurović, A., Sedmak, S., Jandrlić, A., Golubović, D., Zrilić, M., Prokić-Cvetković, R., Popović, O., Milović, L., Rakin, M.,& Engh, E.. (2006). Welders passport-program structure and application. in Proc. of the 1st South-East European Welding Congress - Welding and joining technologies for a sustainable development and environment, Timisoara, Romania, 260-263.
https://hdl.handle.net/21.15107/rcub_machinery_5400

Radović N, Radaković Z, Đurović A, Sedmak S, Jandrlić A, Golubović D, Zrilić M, Prokić-Cvetković R, Popović O, Milović L, Rakin M, Engh E. Welders passport-program structure and application. in Proc. of the 1st South-East European Welding Congress - Welding and joining technologies for a sustainable development and environment, Timisoara, Romania. 2006;:260-263.
https://hdl.handle.net/21.15107/rcub_machinery_5400 .

Radović, Nenad, Radaković, Zoran, Đurović, Aleksandar, Sedmak, Stojan, Jandrlić, A., Golubović, D., Zrilić, Milorad, Prokić-Cvetković, Radica, Popović, Olivera, Milović, Ljubica, Rakin, Marko, Engh, E., "Welders passport-program structure and application" in Proc. of the 1st South-East European Welding Congress - Welding and joining technologies for a sustainable development and environment, Timisoara, Romania (2006):260-263,
https://hdl.handle.net/21.15107/rcub_machinery_5400 .

TY  - CONF
AU  - Engh, Erik
AU  - Sedmak, Aleksandar
AU  - Radaković, Zoran
AU  - Sedmak, Stojan
AU  - Radović, Nenad
PY  - 2006
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/5477
C3  - Savetovanje sa međunarodnim učešćem ZAVARIVANJE 2006 -“Zavarivanje u reparaturi” Zlatibor, 2006
T1  - Pasoš zavarivača – osnovne postavke i namena
UR  - https://hdl.handle.net/21.15107/rcub_machinery_5477
ER  - 

@conference{
author = "Engh, Erik and Sedmak, Aleksandar and Radaković, Zoran and Sedmak, Stojan and Radović, Nenad",
year = "2006",
journal = "Savetovanje sa međunarodnim učešćem ZAVARIVANJE 2006 -“Zavarivanje u reparaturi” Zlatibor, 2006",
title = "Pasoš zavarivača – osnovne postavke i namena",
url = "https://hdl.handle.net/21.15107/rcub_machinery_5477"
}

Engh, E., Sedmak, A., Radaković, Z., Sedmak, S.,& Radović, N.. (2006). Pasoš zavarivača – osnovne postavke i namena. in Savetovanje sa međunarodnim učešćem ZAVARIVANJE 2006 -“Zavarivanje u reparaturi” Zlatibor, 2006.
https://hdl.handle.net/21.15107/rcub_machinery_5477

Engh E, Sedmak A, Radaković Z, Sedmak S, Radović N. Pasoš zavarivača – osnovne postavke i namena. in Savetovanje sa međunarodnim učešćem ZAVARIVANJE 2006 -“Zavarivanje u reparaturi” Zlatibor, 2006. 2006;.
https://hdl.handle.net/21.15107/rcub_machinery_5477 .

Engh, Erik, Sedmak, Aleksandar, Radaković, Zoran, Sedmak, Stojan, Radović, Nenad, "Pasoš zavarivača – osnovne postavke i namena" in Savetovanje sa međunarodnim učešćem ZAVARIVANJE 2006 -“Zavarivanje u reparaturi” Zlatibor, 2006 (2006),
https://hdl.handle.net/21.15107/rcub_machinery_5477 .