TY  - JOUR
AU  - Perković, Srđa
AU  - Sedmak, Aleksandar
AU  - Radaković, Zoran
AU  - Burzić, Zijah
AU  - Sedmak, Simon
AU  - Radović, Ljubica
AU  - Mandić, Ivana
PY  - 2023
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/6886
AB  - The search for alternative materials that can be used for parts of aircraft hydraulic systems has led to the idea of applying S32750 duplex steel for this purpose. This steel is mainly used in the oil and gas, chemical, and food industries. The reasons for this lie in this material’s exceptional welding, mechanical, and corrosion resistance properties. In order to verify this material’s suitability for aircraft engineering applications, it is necessary to investigate its behaviour at various temperatures, since aircrafts operate at a wide range of temperatures. For this reason, the effect of temperatures in the range from +20 °C to −80 °C on impact toughness was investigated in the case of S32750 duplex steel and its welded joints. Testing was performed using an instrumented pendulum to obtain force-time and energy-time diagrams, which allowed for more detailed assessment of the effect of testing temperature on total impact energy and its components of crack initiation energy and crack propagation energy. Testing was performed on standard Charpy specimens extracted from base metal (BM), welded metal (WM), and the heat-affected zone (HAZ). The results of these tests indicated high values of both crack initiation and propagation energies at room temperature for all the zones (BM, WM, and HAZ) and sufficient levels of crack propagation and total impact energies above −50 °C. In addition, fractography was conducted through optical microscopy (OM) and scanning electron microscopy (SEM), indicating ductile vs. cleavage fracture surface areas, which corresponded well with the impact toughness values. The results of this research confirm that the use of S32750 duplex steel in the manufacturing of aircraft hydraulic systems has considerable potential, and future work should confirm this.
PB  - MDPI
T2  - Materials
T1  - Effect of temperature on S32750 duplex steel welded joint impact toughness
IS  - 12
VL  - 16
DO  - 10.3390/ma16124432
ER  - 

@article{
author = "Perković, Srđa and Sedmak, Aleksandar and Radaković, Zoran and Burzić, Zijah and Sedmak, Simon and Radović, Ljubica and Mandić, Ivana",
year = "2023",
abstract = "The search for alternative materials that can be used for parts of aircraft hydraulic systems has led to the idea of applying S32750 duplex steel for this purpose. This steel is mainly used in the oil and gas, chemical, and food industries. The reasons for this lie in this material’s exceptional welding, mechanical, and corrosion resistance properties. In order to verify this material’s suitability for aircraft engineering applications, it is necessary to investigate its behaviour at various temperatures, since aircrafts operate at a wide range of temperatures. For this reason, the effect of temperatures in the range from +20 °C to −80 °C on impact toughness was investigated in the case of S32750 duplex steel and its welded joints. Testing was performed using an instrumented pendulum to obtain force-time and energy-time diagrams, which allowed for more detailed assessment of the effect of testing temperature on total impact energy and its components of crack initiation energy and crack propagation energy. Testing was performed on standard Charpy specimens extracted from base metal (BM), welded metal (WM), and the heat-affected zone (HAZ). The results of these tests indicated high values of both crack initiation and propagation energies at room temperature for all the zones (BM, WM, and HAZ) and sufficient levels of crack propagation and total impact energies above −50 °C. In addition, fractography was conducted through optical microscopy (OM) and scanning electron microscopy (SEM), indicating ductile vs. cleavage fracture surface areas, which corresponded well with the impact toughness values. The results of this research confirm that the use of S32750 duplex steel in the manufacturing of aircraft hydraulic systems has considerable potential, and future work should confirm this.",
publisher = "MDPI",
journal = "Materials",
title = "Effect of temperature on S32750 duplex steel welded joint impact toughness",
number = "12",
volume = "16",
doi = "10.3390/ma16124432"
}

Perković, S., Sedmak, A., Radaković, Z., Burzić, Z., Sedmak, S., Radović, L.,& Mandić, I.. (2023). Effect of temperature on S32750 duplex steel welded joint impact toughness. in Materials
MDPI., 16(12).
https://doi.org/10.3390/ma16124432

Perković S, Sedmak A, Radaković Z, Burzić Z, Sedmak S, Radović L, Mandić I. Effect of temperature on S32750 duplex steel welded joint impact toughness. in Materials. 2023;16(12).
doi:10.3390/ma16124432 .

Perković, Srđa, Sedmak, Aleksandar, Radaković, Zoran, Burzić, Zijah, Sedmak, Simon, Radović, Ljubica, Mandić, Ivana, "Effect of temperature on S32750 duplex steel welded joint impact toughness" in Materials, 16, no. 12 (2023),
https://doi.org/10.3390/ma16124432 . .

TY  - JOUR
AU  - Perković, Srđa
AU  - Radaković, Zoran
AU  - Burzić, Zijah
AU  - Sedmak, Simon
AU  - Sedmak, Aleksandar
AU  - Radović, Ljubica
PY  - 2023
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/6885
AB  - The paper presents the effect of stress concentration on duplex steel S32750 (according to UNS standards or W.Nr. 1.4410 according to EN standards) behaviour under impact loading. This analysis is based on the results obtained by experimental testing, with particular focus on the influence of crack-like defects on material behaviour under impact load.
AB  - Predmet rada je analiza uticaja koncentracije napona na ponašanje dupleks čelika S32750 (prema UNS standardu ili W.Nr. 1.4410 prema EN standard) pri udarnom opterećenju. Na osnovu dobijenih rezultata ispitivanja, analiziran je uticaj prisustva greške tipa prsline na ponašanje materijala predviđenog za udarno opterećenje.
PB  - Society for Structural Integrity and Life - DIVK (Društvo za integritet i vek konstrukcija - DIVK)
PB  - Institute for Materials Testing - IMS (Institut za ispitivanje materijala - IMS)
T2  - Structural Integrity and Life (Integritet i vek konstrukcija)
T1  - Stress concentration effects on toughness value of duplex steel S32750
T1  - Uticaj koncentracije napona na vrednost žilavosti dupleks čelika S32750
EP  - 7
IS  - 1
SP  - 3
VL  - 23
UR  - https://hdl.handle.net/21.15107/rcub_machinery_6885
ER  - 

@article{
author = "Perković, Srđa and Radaković, Zoran and Burzić, Zijah and Sedmak, Simon and Sedmak, Aleksandar and Radović, Ljubica",
year = "2023",
abstract = "The paper presents the effect of stress concentration on duplex steel S32750 (according to UNS standards or W.Nr. 1.4410 according to EN standards) behaviour under impact loading. This analysis is based on the results obtained by experimental testing, with particular focus on the influence of crack-like defects on material behaviour under impact load., Predmet rada je analiza uticaja koncentracije napona na ponašanje dupleks čelika S32750 (prema UNS standardu ili W.Nr. 1.4410 prema EN standard) pri udarnom opterećenju. Na osnovu dobijenih rezultata ispitivanja, analiziran je uticaj prisustva greške tipa prsline na ponašanje materijala predviđenog za udarno opterećenje.",
publisher = "Society for Structural Integrity and Life - DIVK (Društvo za integritet i vek konstrukcija - DIVK), Institute for Materials Testing - IMS (Institut za ispitivanje materijala - IMS)",
journal = "Structural Integrity and Life (Integritet i vek konstrukcija)",
title = "Stress concentration effects on toughness value of duplex steel S32750, Uticaj koncentracije napona na vrednost žilavosti dupleks čelika S32750",
pages = "7-3",
number = "1",
volume = "23",
url = "https://hdl.handle.net/21.15107/rcub_machinery_6885"
}

Perković, S., Radaković, Z., Burzić, Z., Sedmak, S., Sedmak, A.,& Radović, L.. (2023). Stress concentration effects on toughness value of duplex steel S32750. in Structural Integrity and Life (Integritet i vek konstrukcija)
Society for Structural Integrity and Life - DIVK (Društvo za integritet i vek konstrukcija - DIVK)., 23(1), 3-7.
https://hdl.handle.net/21.15107/rcub_machinery_6885

Perković S, Radaković Z, Burzić Z, Sedmak S, Sedmak A, Radović L. Stress concentration effects on toughness value of duplex steel S32750. in Structural Integrity and Life (Integritet i vek konstrukcija). 2023;23(1):3-7.
https://hdl.handle.net/21.15107/rcub_machinery_6885 .

Perković, Srđa, Radaković, Zoran, Burzić, Zijah, Sedmak, Simon, Sedmak, Aleksandar, Radović, Ljubica, "Stress concentration effects on toughness value of duplex steel S32750" in Structural Integrity and Life (Integritet i vek konstrukcija), 23, no. 1 (2023):3-7,
https://hdl.handle.net/21.15107/rcub_machinery_6885 .

TY  - JOUR
AU  - Salih, Rabab
AU  - Veličković, Zlate
AU  - Milošević, Milena
AU  - Pavlović, Vera P.
AU  - Cvijetić, Ilija
AU  - Sofrenić, Ivana V.
AU  - Gržetić, Jelena D.
AU  - Marinković, Aleksandar
PY  - 2023
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/3952
AB  - Multifunctional lignin bio-based adsorbent, b-LMS, was obtained via inverse copolymerization in the suspension of acryloyl modified kraft lignin (KfL-AA) and bio-based trimethylolpropane triacrylate (bio-TMPTA). Morphological and structural characterization of KfL-AA and b-LMS was performed using BET, FTIR, Raman, NMR, TGA, SEM, and XPS techniques. The b-LMS microspheres with 253 ± 42 μm diameters, 69.4 m2 g−1 surface area, and 59% porosity efficiently adsorb Malachite Green (MG), Tartrazine (T), and Methyl Red (MR) dye. The influence of pH, pollutant concentration, temperature, and time on the removal efficiency was studied in a batch mode. Favorable and spontaneous processes with high adsorption capacities e.g. 116.8 mg g−1 for MG, 86.8 mg g−1 for T, and 68.6 mg g−1 for MR indicate the significant adsorptive potential of b-LMS. Results from diffusional and single mass transfer resistance studies indicate that pore diffusion is a rate-limiting step. Theoretical calculations confirmed a higher affinity of b-LMS to cationic dye MG compared with an anionic and neutral one, i.e. T and MR, respectively. The data fitting from a flow system, using semi-empirical equations and Pore Surface Diffusion Modelling (PSDM) provided breakthrough point determination. The results from the desorption and competitive adsorption study proved the exceptional performance of b-LMS. Moreover, sulfation of b-LMS, i.e.production of b-LMS-OSO3H, introduced high-affinity sulfate groups with respect to cationic dye and cations. Developed methodology implements the principle of sustainable development and offers concept whose results contribute to the minimization of environmental pollution.
PB  - Elsevier
T2  - Journal of Environmental Management
T1  - Lignin based microspheres for effective dyes removal: Design, synthesis and adsorption mechanism supported with theoretical study
IS  - January
SP  - 116838
VL  - 326
DO  - 10.1016/j.jenvman.2022.116838
ER  - 

@article{
author = "Salih, Rabab and Veličković, Zlate and Milošević, Milena and Pavlović, Vera P. and Cvijetić, Ilija and Sofrenić, Ivana V. and Gržetić, Jelena D. and Marinković, Aleksandar",
year = "2023",
abstract = "Multifunctional lignin bio-based adsorbent, b-LMS, was obtained via inverse copolymerization in the suspension of acryloyl modified kraft lignin (KfL-AA) and bio-based trimethylolpropane triacrylate (bio-TMPTA). Morphological and structural characterization of KfL-AA and b-LMS was performed using BET, FTIR, Raman, NMR, TGA, SEM, and XPS techniques. The b-LMS microspheres with 253 ± 42 μm diameters, 69.4 m2 g−1 surface area, and 59% porosity efficiently adsorb Malachite Green (MG), Tartrazine (T), and Methyl Red (MR) dye. The influence of pH, pollutant concentration, temperature, and time on the removal efficiency was studied in a batch mode. Favorable and spontaneous processes with high adsorption capacities e.g. 116.8 mg g−1 for MG, 86.8 mg g−1 for T, and 68.6 mg g−1 for MR indicate the significant adsorptive potential of b-LMS. Results from diffusional and single mass transfer resistance studies indicate that pore diffusion is a rate-limiting step. Theoretical calculations confirmed a higher affinity of b-LMS to cationic dye MG compared with an anionic and neutral one, i.e. T and MR, respectively. The data fitting from a flow system, using semi-empirical equations and Pore Surface Diffusion Modelling (PSDM) provided breakthrough point determination. The results from the desorption and competitive adsorption study proved the exceptional performance of b-LMS. Moreover, sulfation of b-LMS, i.e.production of b-LMS-OSO3H, introduced high-affinity sulfate groups with respect to cationic dye and cations. Developed methodology implements the principle of sustainable development and offers concept whose results contribute to the minimization of environmental pollution.",
publisher = "Elsevier",
journal = "Journal of Environmental Management",
title = "Lignin based microspheres for effective dyes removal: Design, synthesis and adsorption mechanism supported with theoretical study",
number = "January",
pages = "116838",
volume = "326",
doi = "10.1016/j.jenvman.2022.116838"
}

Salih, R., Veličković, Z., Milošević, M., Pavlović, V. P., Cvijetić, I., Sofrenić, I. V., Gržetić, J. D.,& Marinković, A.. (2023). Lignin based microspheres for effective dyes removal: Design, synthesis and adsorption mechanism supported with theoretical study. in Journal of Environmental Management
Elsevier., 326(January), 116838.
https://doi.org/10.1016/j.jenvman.2022.116838

Salih R, Veličković Z, Milošević M, Pavlović VP, Cvijetić I, Sofrenić IV, Gržetić JD, Marinković A. Lignin based microspheres for effective dyes removal: Design, synthesis and adsorption mechanism supported with theoretical study. in Journal of Environmental Management. 2023;326(January):116838.
doi:10.1016/j.jenvman.2022.116838 .

Salih, Rabab, Veličković, Zlate, Milošević, Milena, Pavlović, Vera P., Cvijetić, Ilija, Sofrenić, Ivana V., Gržetić, Jelena D., Marinković, Aleksandar, "Lignin based microspheres for effective dyes removal: Design, synthesis and adsorption mechanism supported with theoretical study" in Journal of Environmental Management, 326, no. January (2023):116838,
https://doi.org/10.1016/j.jenvman.2022.116838 . .

TY  - JOUR
AU  - Salih, Rabab
AU  - Veličković, Zlate
AU  - Milošević, Milena
AU  - Pavlović, Vera P.
AU  - Cvijetić, Ilija
AU  - Sofrenić, Ivana V.
AU  - Gržetić, Jelena D.
AU  - Marinković, Aleksandar
PY  - 2023
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/7310
AB  - Multifunctional lignin bio-based adsorbent, b-LMS, was obtained via inverse copolymerization in the suspension of acryloyl modified kraft lignin (KfL-AA) and bio-based trimethylolpropane triacrylate (bio-TMPTA). Morphological and structural characterization of KfL-AA and b-LMS was performed using BET, FTIR, Raman, NMR, TGA, SEM, and XPS techniques. The b-LMS microspheres with 253 ± 42 μm diameters, 69.4 m2 g−1 surface area, and 59% porosity efficiently adsorb Malachite Green (MG), Tartrazine (T), and Methyl Red (MR) dye. The influence of pH, pollutant concentration, temperature, and time on the removal efficiency was studied in a batch mode. Favorable and spontaneous processes with high adsorption capacities e.g. 116.8 mg g−1 for MG, 86.8 mg g−1 for T, and 68.6 mg g−1 for MR indicate the significant adsorptive potential of b-LMS. Results from diffusional and single mass transfer resistance studies indicate that pore diffusion is a rate-limiting step. Theoretical calculations confirmed a higher affinity of b-LMS to cationic dye MG compared with an anionic and neutral one, i.e. T and MR, respectively. The data fitting from a flow system, using semi-empirical equations and Pore Surface Diffusion Modelling (PSDM) provided breakthrough point determination. The results from the desorption and competitive adsorption study proved the exceptional performance of b-LMS. Moreover, sulfation of b-LMS, i.e.production of b-LMS-OSO3H, introduced high-affinity sulfate groups with respect to cationic dye and cations. Developed methodology implements the principle of sustainable development and offers concept whose results contribute to the minimization of environmental pollution.
PB  - Elsevier
T2  - Journal of Environmental Management
T1  - Lignin based microspheres for effective dyes removal: Design, synthesis and adsorption mechanism supported with theoretical study
SP  - 116838
VL  - 326
DO  - 10.1016/j.jenvman.2022.116838
ER  - 

@article{
author = "Salih, Rabab and Veličković, Zlate and Milošević, Milena and Pavlović, Vera P. and Cvijetić, Ilija and Sofrenić, Ivana V. and Gržetić, Jelena D. and Marinković, Aleksandar",
year = "2023",
abstract = "Multifunctional lignin bio-based adsorbent, b-LMS, was obtained via inverse copolymerization in the suspension of acryloyl modified kraft lignin (KfL-AA) and bio-based trimethylolpropane triacrylate (bio-TMPTA). Morphological and structural characterization of KfL-AA and b-LMS was performed using BET, FTIR, Raman, NMR, TGA, SEM, and XPS techniques. The b-LMS microspheres with 253 ± 42 μm diameters, 69.4 m2 g−1 surface area, and 59% porosity efficiently adsorb Malachite Green (MG), Tartrazine (T), and Methyl Red (MR) dye. The influence of pH, pollutant concentration, temperature, and time on the removal efficiency was studied in a batch mode. Favorable and spontaneous processes with high adsorption capacities e.g. 116.8 mg g−1 for MG, 86.8 mg g−1 for T, and 68.6 mg g−1 for MR indicate the significant adsorptive potential of b-LMS. Results from diffusional and single mass transfer resistance studies indicate that pore diffusion is a rate-limiting step. Theoretical calculations confirmed a higher affinity of b-LMS to cationic dye MG compared with an anionic and neutral one, i.e. T and MR, respectively. The data fitting from a flow system, using semi-empirical equations and Pore Surface Diffusion Modelling (PSDM) provided breakthrough point determination. The results from the desorption and competitive adsorption study proved the exceptional performance of b-LMS. Moreover, sulfation of b-LMS, i.e.production of b-LMS-OSO3H, introduced high-affinity sulfate groups with respect to cationic dye and cations. Developed methodology implements the principle of sustainable development and offers concept whose results contribute to the minimization of environmental pollution.",
publisher = "Elsevier",
journal = "Journal of Environmental Management",
title = "Lignin based microspheres for effective dyes removal: Design, synthesis and adsorption mechanism supported with theoretical study",
pages = "116838",
volume = "326",
doi = "10.1016/j.jenvman.2022.116838"
}

Salih, R., Veličković, Z., Milošević, M., Pavlović, V. P., Cvijetić, I., Sofrenić, I. V., Gržetić, J. D.,& Marinković, A.. (2023). Lignin based microspheres for effective dyes removal: Design, synthesis and adsorption mechanism supported with theoretical study. in Journal of Environmental Management
Elsevier., 326, 116838.
https://doi.org/10.1016/j.jenvman.2022.116838

Salih R, Veličković Z, Milošević M, Pavlović VP, Cvijetić I, Sofrenić IV, Gržetić JD, Marinković A. Lignin based microspheres for effective dyes removal: Design, synthesis and adsorption mechanism supported with theoretical study. in Journal of Environmental Management. 2023;326:116838.
doi:10.1016/j.jenvman.2022.116838 .

Salih, Rabab, Veličković, Zlate, Milošević, Milena, Pavlović, Vera P., Cvijetić, Ilija, Sofrenić, Ivana V., Gržetić, Jelena D., Marinković, Aleksandar, "Lignin based microspheres for effective dyes removal: Design, synthesis and adsorption mechanism supported with theoretical study" in Journal of Environmental Management, 326 (2023):116838,
https://doi.org/10.1016/j.jenvman.2022.116838 . .

TY  - JOUR
AU  - Burzić, Zijah
AU  - Perković, Srđa
AU  - Lisov, Miodrag
AU  - Grabulov, Vencislav
AU  - Burzić, Meri
PY  - 2022
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/3704
AB  - U radu su prikazana eksperimentalna istraživanja koja uključuju analizu stvaranja i rasta prsline u zavarenom spoju čelika za rad na povišenim temperaturama. Za bolje razumevanje fenomena stvaranja i rasta prsline u zavarenim spojevima čelika A-204 Gr. A, namenjenog za rad na visokim temperaturama i pritiscima, potrebno je utvrditi uticaj heterogenosti mikrostrukturnih i mehaničkih svojstava na žilavost loma i stvaranje i rast zamorne prsline u komponentama zavarenog spoja. Na osnovu ispitivanja provedenih na CT i Charpy epruvetama na kojima su prethodno inicirane prsline utvrđen je uticaj heterogenosti mikrostrukturnih i mehaničkih svojstava zavarenog spojeva na žilavost loma i parametre rasta zamorne prsline.
AB  - In a paper given, experimental investigations have included the analysis of crack initiation and growth in welded joint of steel for operation at elevated temperatures. For better understanding of the phenomenon of crack initiation and propagation in welded joints of A-204 Gr. A steel, designed for high-temperature and high-pressure application, it is necessary to determine the effect of heterogeneity of microstructural and mechanical properties on fracture toughness and fatigue crack initiation and propagation in welded components. Based on the tests conducted with pre-cracked CT and Charpy size specimens, the effect of heterogeneity of microstructural and mechanical properties of welded joints on fracture toughness and fatigue-crack growth parameters was determined.
PB  - DUZS - Društvo za unapređivanje zavarivanja u Srbiji, Beograd
T2  - Zavarivanje i zavarene konstrukcije
T1  - Inicijacija i rast prsline u zavarenom spoju čelika za rad na povišenim temperaturama
T1  - Crack initiation and growth in welded joint of steel for operation at elevated temperature
EP  - 61
IS  - 2
SP  - 53
VL  - 67
DO  - 10.5937/zzk2202053B
ER  - 

@article{
author = "Burzić, Zijah and Perković, Srđa and Lisov, Miodrag and Grabulov, Vencislav and Burzić, Meri",
year = "2022",
abstract = "U radu su prikazana eksperimentalna istraživanja koja uključuju analizu stvaranja i rasta prsline u zavarenom spoju čelika za rad na povišenim temperaturama. Za bolje razumevanje fenomena stvaranja i rasta prsline u zavarenim spojevima čelika A-204 Gr. A, namenjenog za rad na visokim temperaturama i pritiscima, potrebno je utvrditi uticaj heterogenosti mikrostrukturnih i mehaničkih svojstava na žilavost loma i stvaranje i rast zamorne prsline u komponentama zavarenog spoja. Na osnovu ispitivanja provedenih na CT i Charpy epruvetama na kojima su prethodno inicirane prsline utvrđen je uticaj heterogenosti mikrostrukturnih i mehaničkih svojstava zavarenog spojeva na žilavost loma i parametre rasta zamorne prsline., In a paper given, experimental investigations have included the analysis of crack initiation and growth in welded joint of steel for operation at elevated temperatures. For better understanding of the phenomenon of crack initiation and propagation in welded joints of A-204 Gr. A steel, designed for high-temperature and high-pressure application, it is necessary to determine the effect of heterogeneity of microstructural and mechanical properties on fracture toughness and fatigue crack initiation and propagation in welded components. Based on the tests conducted with pre-cracked CT and Charpy size specimens, the effect of heterogeneity of microstructural and mechanical properties of welded joints on fracture toughness and fatigue-crack growth parameters was determined.",
publisher = "DUZS - Društvo za unapređivanje zavarivanja u Srbiji, Beograd",
journal = "Zavarivanje i zavarene konstrukcije",
title = "Inicijacija i rast prsline u zavarenom spoju čelika za rad na povišenim temperaturama, Crack initiation and growth in welded joint of steel for operation at elevated temperature",
pages = "61-53",
number = "2",
volume = "67",
doi = "10.5937/zzk2202053B"
}

Burzić, Z., Perković, S., Lisov, M., Grabulov, V.,& Burzić, M.. (2022). Inicijacija i rast prsline u zavarenom spoju čelika za rad na povišenim temperaturama. in Zavarivanje i zavarene konstrukcije
DUZS - Društvo za unapređivanje zavarivanja u Srbiji, Beograd., 67(2), 53-61.
https://doi.org/10.5937/zzk2202053B

Burzić Z, Perković S, Lisov M, Grabulov V, Burzić M. Inicijacija i rast prsline u zavarenom spoju čelika za rad na povišenim temperaturama. in Zavarivanje i zavarene konstrukcije. 2022;67(2):53-61.
doi:10.5937/zzk2202053B .

Burzić, Zijah, Perković, Srđa, Lisov, Miodrag, Grabulov, Vencislav, Burzić, Meri, "Inicijacija i rast prsline u zavarenom spoju čelika za rad na povišenim temperaturama" in Zavarivanje i zavarene konstrukcije, 67, no. 2 (2022):53-61,
https://doi.org/10.5937/zzk2202053B . .

TY  - JOUR
AU  - Jelić, Aleksandra
AU  - Sekulić, Milica
AU  - Travica, Milan
AU  - Grzetić, Jelena
AU  - Ugrinović, Vukašin
AU  - Marinković, Aleksandar D.
AU  - Bozić, Aleksandra
AU  - Stamenović, Marina
AU  - Putić, Slaviša
PY  - 2022
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/3775
AB  - In this study, silicate nanofillers; dicalcium silicate, magnesium silicate, tricalcium silicate, and wollastonite; were synthesized using four different methods and incorporated into the epoxy resin to improve its mechanical properties. Characterization of the newly synthesized nanofillers was performed using Fourier-transformation infrared (FTIR) spectroscopy, X-ray diffraction (XRD), scanning electron microscopy (SEM), and transmission electron microscopy (TEM). The purpose of this study was to analyze newly developed composite materials reinforced with silicate nanoparticles utilizing tensile testing and a full-field non-contact 3D Digital Image Correlation (DIC) method. Analysis of deformation and displacement fields gives precise material behavior during testing. Testing results allowed a more reliable assessment of the structural integrity of epoxy composite materials reinforced using different silicate nanofillers. It was concluded that the addition of 3% of dicalcium silicate, magnesium silicate, tricalcium silicate, and wollastonite lead to the increasement of tensile strength up to 31.5%, 29.0%, 27.5%, and 23.5% in comparison with neat epoxy, respectively. In order to offer more trustworthy information about the viscoelastic behavior of neat epoxy and composites, a dynamic mechanical analysis (DMA) was also performed and rheological measurements of uncured epoxy matrix and epoxy suspensions were obtained.
PB  - MDPI, Basel
T2  - Polymers
T1  - Determination of Mechanical Properties of Epoxy Composite Materials Reinforced with Silicate Nanofillers Using Digital Image Correlation (DIC)
IS  - 6
VL  - 14
DO  - 10.3390/polym14061255
ER  - 

@article{
author = "Jelić, Aleksandra and Sekulić, Milica and Travica, Milan and Grzetić, Jelena and Ugrinović, Vukašin and Marinković, Aleksandar D. and Bozić, Aleksandra and Stamenović, Marina and Putić, Slaviša",
year = "2022",
abstract = "In this study, silicate nanofillers; dicalcium silicate, magnesium silicate, tricalcium silicate, and wollastonite; were synthesized using four different methods and incorporated into the epoxy resin to improve its mechanical properties. Characterization of the newly synthesized nanofillers was performed using Fourier-transformation infrared (FTIR) spectroscopy, X-ray diffraction (XRD), scanning electron microscopy (SEM), and transmission electron microscopy (TEM). The purpose of this study was to analyze newly developed composite materials reinforced with silicate nanoparticles utilizing tensile testing and a full-field non-contact 3D Digital Image Correlation (DIC) method. Analysis of deformation and displacement fields gives precise material behavior during testing. Testing results allowed a more reliable assessment of the structural integrity of epoxy composite materials reinforced using different silicate nanofillers. It was concluded that the addition of 3% of dicalcium silicate, magnesium silicate, tricalcium silicate, and wollastonite lead to the increasement of tensile strength up to 31.5%, 29.0%, 27.5%, and 23.5% in comparison with neat epoxy, respectively. In order to offer more trustworthy information about the viscoelastic behavior of neat epoxy and composites, a dynamic mechanical analysis (DMA) was also performed and rheological measurements of uncured epoxy matrix and epoxy suspensions were obtained.",
publisher = "MDPI, Basel",
journal = "Polymers",
title = "Determination of Mechanical Properties of Epoxy Composite Materials Reinforced with Silicate Nanofillers Using Digital Image Correlation (DIC)",
number = "6",
volume = "14",
doi = "10.3390/polym14061255"
}

Jelić, A., Sekulić, M., Travica, M., Grzetić, J., Ugrinović, V., Marinković, A. D., Bozić, A., Stamenović, M.,& Putić, S.. (2022). Determination of Mechanical Properties of Epoxy Composite Materials Reinforced with Silicate Nanofillers Using Digital Image Correlation (DIC). in Polymers
MDPI, Basel., 14(6).
https://doi.org/10.3390/polym14061255

Jelić A, Sekulić M, Travica M, Grzetić J, Ugrinović V, Marinković AD, Bozić A, Stamenović M, Putić S. Determination of Mechanical Properties of Epoxy Composite Materials Reinforced with Silicate Nanofillers Using Digital Image Correlation (DIC). in Polymers. 2022;14(6).
doi:10.3390/polym14061255 .

Jelić, Aleksandra, Sekulić, Milica, Travica, Milan, Grzetić, Jelena, Ugrinović, Vukašin, Marinković, Aleksandar D., Bozić, Aleksandra, Stamenović, Marina, Putić, Slaviša, "Determination of Mechanical Properties of Epoxy Composite Materials Reinforced with Silicate Nanofillers Using Digital Image Correlation (DIC)" in Polymers, 14, no. 6 (2022),
https://doi.org/10.3390/polym14061255 . .

TY  - JOUR
AU  - Marjanović, Milica
AU  - Bajić, Danica
AU  - Perković, Srđa
AU  - Fidanovski, Bojana
AU  - Burzić, Zijah
AU  - Matija, Lidija
AU  - Bekrić, Dragoljub
PY  - 2021
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/3514
AB  - A possibility was examined to enhance carbon-epoxy laminated composite mechanical properties by introducing a small concentration of reinforcing nanostructures - multi-wall onion-shaped fullerene-like nanoparticles of tungsten disulfide IF-WS2, and its multi-layer hollow nanotubes, INT-WS2, both known for their outstanding thermal, chemical, and mechanical resistance. Composite structures were prepared using a unidirectional prepreg of strong carbon fibers and epoxy resin, poly (vinyl butyral) solution in ethanol with ultrasonically dispersed WS2 nanostructures in it. Particle size analysis has been performed to evaluate the quality of IF-WS2 nanoparticles. SEM/EDS analysis was applied to observe the nanostructures, their dispersion in the composite, and the fracture zone after mechanical resistance tests of the prepared composite samples. Thorough mechanical tests were performed on a set of specimens with different fiber orientations: tensile test, bending test, and interlaminar shear test. The encouraging results were obtained, indicating that these newly designed light-weight composites are applicable for the automotive and nautical industry, unmanned aerial vehicles, and military aircrafts.
PB  - Taylor & Francis Inc, Philadelphia
T2  - Fullerenes Nanotubes and Carbon Nanostructures
T1  - Inorganic fullerene-like nanoparticles and nanotubes of tungsten disulfide as reinforcement of carbon-epoxy composites
EP  - 1044
IS  - 12
SP  - 1034
VL  - 29
DO  - 10.1080/1536383X.2021.1928644
ER  - 

@article{
author = "Marjanović, Milica and Bajić, Danica and Perković, Srđa and Fidanovski, Bojana and Burzić, Zijah and Matija, Lidija and Bekrić, Dragoljub",
year = "2021",
abstract = "A possibility was examined to enhance carbon-epoxy laminated composite mechanical properties by introducing a small concentration of reinforcing nanostructures - multi-wall onion-shaped fullerene-like nanoparticles of tungsten disulfide IF-WS2, and its multi-layer hollow nanotubes, INT-WS2, both known for their outstanding thermal, chemical, and mechanical resistance. Composite structures were prepared using a unidirectional prepreg of strong carbon fibers and epoxy resin, poly (vinyl butyral) solution in ethanol with ultrasonically dispersed WS2 nanostructures in it. Particle size analysis has been performed to evaluate the quality of IF-WS2 nanoparticles. SEM/EDS analysis was applied to observe the nanostructures, their dispersion in the composite, and the fracture zone after mechanical resistance tests of the prepared composite samples. Thorough mechanical tests were performed on a set of specimens with different fiber orientations: tensile test, bending test, and interlaminar shear test. The encouraging results were obtained, indicating that these newly designed light-weight composites are applicable for the automotive and nautical industry, unmanned aerial vehicles, and military aircrafts.",
publisher = "Taylor & Francis Inc, Philadelphia",
journal = "Fullerenes Nanotubes and Carbon Nanostructures",
title = "Inorganic fullerene-like nanoparticles and nanotubes of tungsten disulfide as reinforcement of carbon-epoxy composites",
pages = "1044-1034",
number = "12",
volume = "29",
doi = "10.1080/1536383X.2021.1928644"
}

Marjanović, M., Bajić, D., Perković, S., Fidanovski, B., Burzić, Z., Matija, L.,& Bekrić, D.. (2021). Inorganic fullerene-like nanoparticles and nanotubes of tungsten disulfide as reinforcement of carbon-epoxy composites. in Fullerenes Nanotubes and Carbon Nanostructures
Taylor & Francis Inc, Philadelphia., 29(12), 1034-1044.
https://doi.org/10.1080/1536383X.2021.1928644

Marjanović M, Bajić D, Perković S, Fidanovski B, Burzić Z, Matija L, Bekrić D. Inorganic fullerene-like nanoparticles and nanotubes of tungsten disulfide as reinforcement of carbon-epoxy composites. in Fullerenes Nanotubes and Carbon Nanostructures. 2021;29(12):1034-1044.
doi:10.1080/1536383X.2021.1928644 .

Marjanović, Milica, Bajić, Danica, Perković, Srđa, Fidanovski, Bojana, Burzić, Zijah, Matija, Lidija, Bekrić, Dragoljub, "Inorganic fullerene-like nanoparticles and nanotubes of tungsten disulfide as reinforcement of carbon-epoxy composites" in Fullerenes Nanotubes and Carbon Nanostructures, 29, no. 12 (2021):1034-1044,
https://doi.org/10.1080/1536383X.2021.1928644 . .

TY  - JOUR
AU  - Raković, Dragan
AU  - Simonović, Aleksandar
AU  - Grbović, Aleksandar
AU  - Radović, Ljubica
AU  - Vorkapić, Miloš
AU  - Krstić, Branimir
PY  - 2021
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/3490
AB  - This paper presents the failure analysis results of the helicopter skid landing gear. The helicopter skid landing gear fractured while the helicopter was on the ground at the airport. The aft cross tube of the landing gear assembly was found fractured into two pieces. Observation of crack propagation area at low magnification revealed numerous secondary cracks, inner surface irregularities while fracture surface indicated fatigue process. Macro-fractographic analysis of the fracture surface disclosed features that gave additional indication of fatigue. Examination of mating fracture surfaces under scanning electron microscope (SEM) detected the existence of irregularities in the material. Chemical analysis showed the aft cross tube is made of high-strength aluminum alloy. The stress analysis of skid landing gear, using the finite element method (FEM), has identified the stress-deformation condition of the helicopter landing gear with a detail insight of the stress state in the vicinity of the crack origin. The stress value, in case of maximal takeoff weight, was very high in the crack initiation zone. The results indicate the superposition of manufacturing-in, designing-in as well as operating in defects which led to total failure of the helicopter skid landing gear aft cross tube.
PB  - Pergamon-Elsevier Science Ltd, Oxford
T2  - Engineering Failure Analysis
T1  - Fatigue fracture analysis of helicopter landing gear cross tube
VL  - 129
DO  - 10.1016/j.engfailanal.2021.105672
ER  - 

@article{
author = "Raković, Dragan and Simonović, Aleksandar and Grbović, Aleksandar and Radović, Ljubica and Vorkapić, Miloš and Krstić, Branimir",
year = "2021",
abstract = "This paper presents the failure analysis results of the helicopter skid landing gear. The helicopter skid landing gear fractured while the helicopter was on the ground at the airport. The aft cross tube of the landing gear assembly was found fractured into two pieces. Observation of crack propagation area at low magnification revealed numerous secondary cracks, inner surface irregularities while fracture surface indicated fatigue process. Macro-fractographic analysis of the fracture surface disclosed features that gave additional indication of fatigue. Examination of mating fracture surfaces under scanning electron microscope (SEM) detected the existence of irregularities in the material. Chemical analysis showed the aft cross tube is made of high-strength aluminum alloy. The stress analysis of skid landing gear, using the finite element method (FEM), has identified the stress-deformation condition of the helicopter landing gear with a detail insight of the stress state in the vicinity of the crack origin. The stress value, in case of maximal takeoff weight, was very high in the crack initiation zone. The results indicate the superposition of manufacturing-in, designing-in as well as operating in defects which led to total failure of the helicopter skid landing gear aft cross tube.",
publisher = "Pergamon-Elsevier Science Ltd, Oxford",
journal = "Engineering Failure Analysis",
title = "Fatigue fracture analysis of helicopter landing gear cross tube",
volume = "129",
doi = "10.1016/j.engfailanal.2021.105672"
}

Raković, D., Simonović, A., Grbović, A., Radović, L., Vorkapić, M.,& Krstić, B.. (2021). Fatigue fracture analysis of helicopter landing gear cross tube. in Engineering Failure Analysis
Pergamon-Elsevier Science Ltd, Oxford., 129.
https://doi.org/10.1016/j.engfailanal.2021.105672

Raković D, Simonović A, Grbović A, Radović L, Vorkapić M, Krstić B. Fatigue fracture analysis of helicopter landing gear cross tube. in Engineering Failure Analysis. 2021;129.
doi:10.1016/j.engfailanal.2021.105672 .

Raković, Dragan, Simonović, Aleksandar, Grbović, Aleksandar, Radović, Ljubica, Vorkapić, Miloš, Krstić, Branimir, "Fatigue fracture analysis of helicopter landing gear cross tube" in Engineering Failure Analysis, 129 (2021),
https://doi.org/10.1016/j.engfailanal.2021.105672 . .