TY  - JOUR
AU  - Trajković, Isaak
AU  - Milošević, Miloš
AU  - Travica, Milan
AU  - Rakin, Marko
AU  - Mladenović, Goran
AU  - Kudrjavceva, Ljudmila
AU  - Međo, Bojan
PY  - 2022
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/5348
AB  - This paper presents a part of development of a non-standard method for testing of cylindrical test specimens for measurement of fracture properties of pipeline materials. This method for testing of cylindrical structures working under pressure is based on determining of fracture mechanics parameters on SENT (Single Edge Notched Tension) specimens and new PRNT (Pipe Ring Notched Tension) specimens. In this work, both types of specimens required for this testing were manufactured from polyamide PA12 by using SLS (selective laser sintering) additive manufacturing method. Testing of the specimens is performed on the universal device for testing of mechanical properties of materials Shimadzu, AGS-X 100 kN. The tensile testing is accompanied by GOM Aramis 2M system, used for digital image correlation. By using these two systems, test results are obtained for ring-shaped and SENT specimens, including forces, displacements and fracture mechanics parameters CMOD (Crack Mouth Opening Displacement) and CTOD-δ5 (Crack Tip Opening Displacement obtained by δ5 technique), as well as crack growth. Repeatability of this process, along with valid result consistency, represent the basis for further development of the new method, including the determining of energy-based fracture mechanics parameters: J integral and stress intensity factor.
PB  - International Institute for the Science of Sintering (IISS)
T2  - Science of Sintering
T1  - Novel Method for Measurement of Pipeline Materials Fracture Resistance-Examination on Selective Laser Sintered Cylindrical Specimens
EP  - 386
IS  - 3
SP  - 373
VL  - 54
DO  - 10.2298/SOS2203373T
ER  - 

@article{
author = "Trajković, Isaak and Milošević, Miloš and Travica, Milan and Rakin, Marko and Mladenović, Goran and Kudrjavceva, Ljudmila and Međo, Bojan",
year = "2022",
abstract = "This paper presents a part of development of a non-standard method for testing of cylindrical test specimens for measurement of fracture properties of pipeline materials. This method for testing of cylindrical structures working under pressure is based on determining of fracture mechanics parameters on SENT (Single Edge Notched Tension) specimens and new PRNT (Pipe Ring Notched Tension) specimens. In this work, both types of specimens required for this testing were manufactured from polyamide PA12 by using SLS (selective laser sintering) additive manufacturing method. Testing of the specimens is performed on the universal device for testing of mechanical properties of materials Shimadzu, AGS-X 100 kN. The tensile testing is accompanied by GOM Aramis 2M system, used for digital image correlation. By using these two systems, test results are obtained for ring-shaped and SENT specimens, including forces, displacements and fracture mechanics parameters CMOD (Crack Mouth Opening Displacement) and CTOD-δ5 (Crack Tip Opening Displacement obtained by δ5 technique), as well as crack growth. Repeatability of this process, along with valid result consistency, represent the basis for further development of the new method, including the determining of energy-based fracture mechanics parameters: J integral and stress intensity factor.",
publisher = "International Institute for the Science of Sintering (IISS)",
journal = "Science of Sintering",
title = "Novel Method for Measurement of Pipeline Materials Fracture Resistance-Examination on Selective Laser Sintered Cylindrical Specimens",
pages = "386-373",
number = "3",
volume = "54",
doi = "10.2298/SOS2203373T"
}

Trajković, I., Milošević, M., Travica, M., Rakin, M., Mladenović, G., Kudrjavceva, L.,& Međo, B.. (2022). Novel Method for Measurement of Pipeline Materials Fracture Resistance-Examination on Selective Laser Sintered Cylindrical Specimens. in Science of Sintering
International Institute for the Science of Sintering (IISS)., 54(3), 373-386.
https://doi.org/10.2298/SOS2203373T

Trajković I, Milošević M, Travica M, Rakin M, Mladenović G, Kudrjavceva L, Međo B. Novel Method for Measurement of Pipeline Materials Fracture Resistance-Examination on Selective Laser Sintered Cylindrical Specimens. in Science of Sintering. 2022;54(3):373-386.
doi:10.2298/SOS2203373T .

Trajković, Isaak, Milošević, Miloš, Travica, Milan, Rakin, Marko, Mladenović, Goran, Kudrjavceva, Ljudmila, Međo, Bojan, "Novel Method for Measurement of Pipeline Materials Fracture Resistance-Examination on Selective Laser Sintered Cylindrical Specimens" in Science of Sintering, 54, no. 3 (2022):373-386,
https://doi.org/10.2298/SOS2203373T . .

TY  - JOUR
AU  - Kovačević, Tihomir
AU  - Rusmirović, Jelena
AU  - Tomić, Nataša
AU  - Mladenović, Goran
AU  - Milosević, Miloš
AU  - Mitrović, Nenad
AU  - Marinković, Aleksandar
PY  - 2019
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/4310
AB  - The investigation of the influence of acid/base treatment and addition level of non-metallic fractions (NMFs), obtained by processing of printed circuit boards, on the mechanical properties and shrinkage of unsaturated polyester resin (UPR)-based composites was main topic presented in this paper. NMF particles were treated using four different oxidative/etching agents: H2SO4/KMnO4 (NMF1), H2SO4/HNO3 (NMF2), HNO3 (NMF3), and NaOH (NMF4). Treated NMF(1-4) particles were characterized using fourier transform infrared, Boehm titration, optical microscopy and SEM analysis. Tensile strength and micro Vickers hardness of UPR/NMF(1-4) composites were the most improved with addition of 0.5wt% of filler, for 5.9-24.7%, in comparison to composite filled with non-treated NMF particles. Cross-linking density (nu), storage, and loss modulus (G' and G''), damping factor (tan delta) and glass transition temperature (T-g) of the composites were determined from the dynamic-mechanical analysis (DMA) testing. Shrinkage measurements, performed using Aramis 6.2.0, showed significant improvement in shrinkage reducing, for 17.8-30.6%, by introduction the oxidized NMF particles. Qualitative/quantitative evaluation of NMF(1-4) surface functionalities helped in understanding their influences on mechanical, DMA and shrinkage properties change of studied composites. POLYM. COMPOS., 40:1170-1186, 2019.
PB  - Wiley, Hoboken
T2  - Polymer Composites
T1  - Effects of oxidized/treated non-metallic fillers obtained from waste printed circuit boards on mechanical properties and shrinkage of unsaturated polyester-based composites
EP  - 1186
IS  - 3
SP  - 1170
VL  - 40
DO  - 10.1002/pc.24827
ER  - 

@article{
author = "Kovačević, Tihomir and Rusmirović, Jelena and Tomić, Nataša and Mladenović, Goran and Milosević, Miloš and Mitrović, Nenad and Marinković, Aleksandar",
year = "2019",
abstract = "The investigation of the influence of acid/base treatment and addition level of non-metallic fractions (NMFs), obtained by processing of printed circuit boards, on the mechanical properties and shrinkage of unsaturated polyester resin (UPR)-based composites was main topic presented in this paper. NMF particles were treated using four different oxidative/etching agents: H2SO4/KMnO4 (NMF1), H2SO4/HNO3 (NMF2), HNO3 (NMF3), and NaOH (NMF4). Treated NMF(1-4) particles were characterized using fourier transform infrared, Boehm titration, optical microscopy and SEM analysis. Tensile strength and micro Vickers hardness of UPR/NMF(1-4) composites were the most improved with addition of 0.5wt% of filler, for 5.9-24.7%, in comparison to composite filled with non-treated NMF particles. Cross-linking density (nu), storage, and loss modulus (G' and G''), damping factor (tan delta) and glass transition temperature (T-g) of the composites were determined from the dynamic-mechanical analysis (DMA) testing. Shrinkage measurements, performed using Aramis 6.2.0, showed significant improvement in shrinkage reducing, for 17.8-30.6%, by introduction the oxidized NMF particles. Qualitative/quantitative evaluation of NMF(1-4) surface functionalities helped in understanding their influences on mechanical, DMA and shrinkage properties change of studied composites. POLYM. COMPOS., 40:1170-1186, 2019.",
publisher = "Wiley, Hoboken",
journal = "Polymer Composites",
title = "Effects of oxidized/treated non-metallic fillers obtained from waste printed circuit boards on mechanical properties and shrinkage of unsaturated polyester-based composites",
pages = "1186-1170",
number = "3",
volume = "40",
doi = "10.1002/pc.24827"
}

Kovačević, T., Rusmirović, J., Tomić, N., Mladenović, G., Milosević, M., Mitrović, N.,& Marinković, A.. (2019). Effects of oxidized/treated non-metallic fillers obtained from waste printed circuit boards on mechanical properties and shrinkage of unsaturated polyester-based composites. in Polymer Composites
Wiley, Hoboken., 40(3), 1170-1186.
https://doi.org/10.1002/pc.24827

Kovačević T, Rusmirović J, Tomić N, Mladenović G, Milosević M, Mitrović N, Marinković A. Effects of oxidized/treated non-metallic fillers obtained from waste printed circuit boards on mechanical properties and shrinkage of unsaturated polyester-based composites. in Polymer Composites. 2019;40(3):1170-1186.
doi:10.1002/pc.24827 .

Kovačević, Tihomir, Rusmirović, Jelena, Tomić, Nataša, Mladenović, Goran, Milosević, Miloš, Mitrović, Nenad, Marinković, Aleksandar, "Effects of oxidized/treated non-metallic fillers obtained from waste printed circuit boards on mechanical properties and shrinkage of unsaturated polyester-based composites" in Polymer Composites, 40, no. 3 (2019):1170-1186,
https://doi.org/10.1002/pc.24827 . .

TY  - CONF
AU  - Mladenović, Goran
AU  - Živanović, Sasa
AU  - Milošević, Miloš
AU  - sedmak, aleksandar
AU  - Plohar, Andrej
AU  - Ivanovic, Ivana
AU  - Rakin, Marko
PY  - 2017
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/6340
AB  - Reformer is an integral component of the polymeric electrolyte membrane (PEM) fuel cell and it is used for
experimental combustion testing. By analyzing the geometry of the experimental reformer, it consists of three
plates, two pins for leading and a single screw for sealing. In terms of technological analysis for
manufacturing of the experimental reformer emphasis was thrown on the intermediate plate which is
necessary to carry out Wire EDM machining. Before the machining based on CAD models it was performed
tool part generation in order to perform machining simulation. In order to minimize manufacturing costs by
techno-economic analysis it was varying the wire thickness, and therefore cutting parameters. Besides the
variation of the cutting parameters it was varied and the intermediate plate thickness. It was made a three
sets of experimental reformer, wherein the electrical discharge machining (EDM) was performed on two
machines (Mitsubishi FA-10S Wire EDM and "Ewis" EV.00.000M4) with two different wire thickness. After
machining is was carried out the welding procedure, and after that re-machining in order of remove the
excess material which is applied by welding process.
PB  - Innovation Center of Faculty of Mechanical Engineering
C3  - International Conference of Experimental and Numerical Investigations and New Technologies - CNN TECH
T1  - Technological analysis for machining of the reformers for fuel cells testing
SP  - 52
UR  - https://hdl.handle.net/21.15107/rcub_technorep_6340
ER  - 

@conference{
author = "Mladenović, Goran and Živanović, Sasa and Milošević, Miloš and sedmak, aleksandar and Plohar, Andrej and Ivanovic, Ivana and Rakin, Marko",
year = "2017",
abstract = "Reformer is an integral component of the polymeric electrolyte membrane (PEM) fuel cell and it is used for
experimental combustion testing. By analyzing the geometry of the experimental reformer, it consists of three
plates, two pins for leading and a single screw for sealing. In terms of technological analysis for
manufacturing of the experimental reformer emphasis was thrown on the intermediate plate which is
necessary to carry out Wire EDM machining. Before the machining based on CAD models it was performed
tool part generation in order to perform machining simulation. In order to minimize manufacturing costs by
techno-economic analysis it was varying the wire thickness, and therefore cutting parameters. Besides the
variation of the cutting parameters it was varied and the intermediate plate thickness. It was made a three
sets of experimental reformer, wherein the electrical discharge machining (EDM) was performed on two
machines (Mitsubishi FA-10S Wire EDM and "Ewis" EV.00.000M4) with two different wire thickness. After
machining is was carried out the welding procedure, and after that re-machining in order of remove the
excess material which is applied by welding process.",
publisher = "Innovation Center of Faculty of Mechanical Engineering",
journal = "International Conference of Experimental and Numerical Investigations and New Technologies - CNN TECH",
title = "Technological analysis for machining of the reformers for fuel cells testing",
pages = "52",
url = "https://hdl.handle.net/21.15107/rcub_technorep_6340"
}

Mladenović, G., Živanović, S., Milošević, M., sedmak, a., Plohar, A., Ivanovic, I.,& Rakin, M.. (2017). Technological analysis for machining of the reformers for fuel cells testing. in International Conference of Experimental and Numerical Investigations and New Technologies - CNN TECH
Innovation Center of Faculty of Mechanical Engineering., 52.
https://hdl.handle.net/21.15107/rcub_technorep_6340

Mladenović G, Živanović S, Milošević M, sedmak A, Plohar A, Ivanovic I, Rakin M. Technological analysis for machining of the reformers for fuel cells testing. in International Conference of Experimental and Numerical Investigations and New Technologies - CNN TECH. 2017;:52.
https://hdl.handle.net/21.15107/rcub_technorep_6340 .

Mladenović, Goran, Živanović, Sasa, Milošević, Miloš, sedmak, aleksandar, Plohar, Andrej, Ivanovic, Ivana, Rakin, Marko, "Technological analysis for machining of the reformers for fuel cells testing" in International Conference of Experimental and Numerical Investigations and New Technologies - CNN TECH (2017):52,
https://hdl.handle.net/21.15107/rcub_technorep_6340 .