TY  - JOUR
AU  - Jelić, Aleksandra
AU  - Sekulić, Milica
AU  - Travica, Milan
AU  - Gržetić, Jelena
AU  - Ugrinović, Vukašin
AU  - Marinković, Aleksandar D.
AU  - Božić, Aleksandra
AU  - Stamenović, Marina
AU  - Putić, Slaviša
PY  - 2022
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/10237
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.
T2  - Polymers
T1  - Determination of Mechanical Properties of Epoxy Composite Materials Reinforced with Silicate Nanofillers Using Digital Image Correlation (DIC)
VL  - 14
IS  - 6
SP  - 1255
DO  - 10.3390/polym14061255
ER  - 

@article{
author = "Jelić, Aleksandra and Sekulić, Milica and Travica, Milan and Gržetić, Jelena and Ugrinović, Vukašin and Marinković, Aleksandar D. and Božić, 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.",
journal = "Polymers",
title = "Determination of Mechanical Properties of Epoxy Composite Materials Reinforced with Silicate Nanofillers Using Digital Image Correlation (DIC)",
volume = "14",
number = "6",
pages = "1255",
doi = "10.3390/polym14061255"
}

Jelić, A., Sekulić, M., Travica, M., Gržetić, J., Ugrinović, V., Marinković, A. D., Božić, 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, 14(6), 1255.
https://doi.org/10.3390/polym14061255

Jelić A, Sekulić M, Travica M, Gržetić J, Ugrinović V, Marinković AD, Božić 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):1255.
doi:10.3390/polym14061255 .

Jelić, Aleksandra, Sekulić, Milica, Travica, Milan, Gržetić, Jelena, Ugrinović, Vukašin, Marinković, Aleksandar D., Božić, 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):1255,
https://doi.org/10.3390/polym14061255 . .

TY  - JOUR
AU  - Jelić, Aleksandra
AU  - Marinković, Aleksandar D.
AU  - Sekulić, Milica
AU  - Dikić, Stefan
AU  - Ugrinović, Vukašin
AU  - Pavlović, Vladimir B.
AU  - Putić, Slaviša
PY  - 2021
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/9562
AB  - In this study, halloysite nanotubes (HNT) were modified by: 3-glycidyloxypropyltrimethoxysilane (GLYMO), 3-aminopropyltrimethoxysilane (APTES), and 2,2-Bis[4-(glycidyloxy) phenyl] propane (DGEBA), and incorporated in the epoxy resin matrix to enhance its mechanical properties. The HNT/epoxy nanocomposite materials were prepared by mixing different ratios of untreated/treated HNT with neat epoxy resin. Characterization of untreated/treated HNT was performed by Fourier-transformation infrared (FTIR) spectroscopy, and X-ray diffraction (XRD). The quantity of grafted molecules and thermal stability of newly synthesized materials were determined by thermogravimetric (TG) and derivative thermogravimetric (DTG) analysis. Tensile properties of newly synthesized materials were compared, and scanning electron microscopy (SEM) and transmission electron microscopy (TEM) analysis of the fracture surfaces were performed. Incorporation of APTES modified HNT (HNTAPT) and two-step modification APTES followed by DGEBA (HNTAPTDG) has increased the tensile strength of the nanocomposite materials up to 72% and 61%, and strain at break up to 1082% and 1216%, respectively, compared to neat epoxy. It was concluded that the modification of HNT contributed to the enhancement of the dispersion and the cross-linking in the epoxy resin matrix. © 2021 Society of Plastics Engineers
T2  - Polymer Composites
T1  - Design of halloysite modification for improvement of mechanical properties of the epoxy based nanocomposites
VL  - 42
IS  - 5
SP  - 2180
EP  - 2192
DO  - 10.1002/pc.25967
ER  - 

@article{
author = "Jelić, Aleksandra and Marinković, Aleksandar D. and Sekulić, Milica and Dikić, Stefan and Ugrinović, Vukašin and Pavlović, Vladimir B. and Putić, Slaviša",
year = "2021",
abstract = "In this study, halloysite nanotubes (HNT) were modified by: 3-glycidyloxypropyltrimethoxysilane (GLYMO), 3-aminopropyltrimethoxysilane (APTES), and 2,2-Bis[4-(glycidyloxy) phenyl] propane (DGEBA), and incorporated in the epoxy resin matrix to enhance its mechanical properties. The HNT/epoxy nanocomposite materials were prepared by mixing different ratios of untreated/treated HNT with neat epoxy resin. Characterization of untreated/treated HNT was performed by Fourier-transformation infrared (FTIR) spectroscopy, and X-ray diffraction (XRD). The quantity of grafted molecules and thermal stability of newly synthesized materials were determined by thermogravimetric (TG) and derivative thermogravimetric (DTG) analysis. Tensile properties of newly synthesized materials were compared, and scanning electron microscopy (SEM) and transmission electron microscopy (TEM) analysis of the fracture surfaces were performed. Incorporation of APTES modified HNT (HNTAPT) and two-step modification APTES followed by DGEBA (HNTAPTDG) has increased the tensile strength of the nanocomposite materials up to 72% and 61%, and strain at break up to 1082% and 1216%, respectively, compared to neat epoxy. It was concluded that the modification of HNT contributed to the enhancement of the dispersion and the cross-linking in the epoxy resin matrix. © 2021 Society of Plastics Engineers",
journal = "Polymer Composites",
title = "Design of halloysite modification for improvement of mechanical properties of the epoxy based nanocomposites",
volume = "42",
number = "5",
pages = "2180-2192",
doi = "10.1002/pc.25967"
}

Jelić, A., Marinković, A. D., Sekulić, M., Dikić, S., Ugrinović, V., Pavlović, V. B.,& Putić, S.. (2021). Design of halloysite modification for improvement of mechanical properties of the epoxy based nanocomposites. in Polymer Composites, 42(5), 2180-2192.
https://doi.org/10.1002/pc.25967

Jelić A, Marinković AD, Sekulić M, Dikić S, Ugrinović V, Pavlović VB, Putić S. Design of halloysite modification for improvement of mechanical properties of the epoxy based nanocomposites. in Polymer Composites. 2021;42(5):2180-2192.
doi:10.1002/pc.25967 .

Jelić, Aleksandra, Marinković, Aleksandar D., Sekulić, Milica, Dikić, Stefan, Ugrinović, Vukašin, Pavlović, Vladimir B., Putić, Slaviša, "Design of halloysite modification for improvement of mechanical properties of the epoxy based nanocomposites" in Polymer Composites, 42, no. 5 (2021):2180-2192,
https://doi.org/10.1002/pc.25967 . .

TY  - JOUR
AU  - Jelić, Aleksandra
AU  - Sekulić, Milica
AU  - Stamenović, Marina
AU  - Ugrinović, Vukašin
AU  - Putić, Slaviša
PY  - 2020
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/9707
AB  - The paper presents static and dynamic tests of carbon/epoxy composite materials with fiber orientation at 0 degrees/90 degrees and +/- 45 degrees. The main tensile properties were determined as a basis for subsequent dynamic tests, in which permanent dynamic strength, crack growth, and crack growth rate in the material due to the action of fatigue load were assessed. Comparisons were made regarding the structure of the tested specimens. Samples were obtained from prepregs with a specific density of 1600 kg/m(3). The tests were performed at room temperature. Scanning electron microscopy (SEM) was used to analyze the damage in the material during these tests, the mechanisms of their further damage progression and, the impact on the growth and growth rate of the initial crack in the material. The analysis of numerical results and micromechanical analysis confirmed the dominant role of the reinforcing structural element in the material in all performed tests. The obtained results are of great importance in the application of composite materials of such structures under different operating conditions and load regimes.
T2  - Hemijska industrija
T1  - Micromechanical analysis of fatigue and crack growth in carbon-fiber epoxy composites based on mechanical testing
VL  - 74
IS  - 4
SP  - 257
EP  - 264
DO  - 10.2298/HEMIND200615022J
ER  - 

@article{
author = "Jelić, Aleksandra and Sekulić, Milica and Stamenović, Marina and Ugrinović, Vukašin and Putić, Slaviša",
year = "2020",
abstract = "The paper presents static and dynamic tests of carbon/epoxy composite materials with fiber orientation at 0 degrees/90 degrees and +/- 45 degrees. The main tensile properties were determined as a basis for subsequent dynamic tests, in which permanent dynamic strength, crack growth, and crack growth rate in the material due to the action of fatigue load were assessed. Comparisons were made regarding the structure of the tested specimens. Samples were obtained from prepregs with a specific density of 1600 kg/m(3). The tests were performed at room temperature. Scanning electron microscopy (SEM) was used to analyze the damage in the material during these tests, the mechanisms of their further damage progression and, the impact on the growth and growth rate of the initial crack in the material. The analysis of numerical results and micromechanical analysis confirmed the dominant role of the reinforcing structural element in the material in all performed tests. The obtained results are of great importance in the application of composite materials of such structures under different operating conditions and load regimes.",
journal = "Hemijska industrija",
title = "Micromechanical analysis of fatigue and crack growth in carbon-fiber epoxy composites based on mechanical testing",
volume = "74",
number = "4",
pages = "257-264",
doi = "10.2298/HEMIND200615022J"
}

Jelić, A., Sekulić, M., Stamenović, M., Ugrinović, V.,& Putić, S.. (2020). Micromechanical analysis of fatigue and crack growth in carbon-fiber epoxy composites based on mechanical testing. in Hemijska industrija, 74(4), 257-264.
https://doi.org/10.2298/HEMIND200615022J

Jelić A, Sekulić M, Stamenović M, Ugrinović V, Putić S. Micromechanical analysis of fatigue and crack growth in carbon-fiber epoxy composites based on mechanical testing. in Hemijska industrija. 2020;74(4):257-264.
doi:10.2298/HEMIND200615022J .

Jelić, Aleksandra, Sekulić, Milica, Stamenović, Marina, Ugrinović, Vukašin, Putić, Slaviša, "Micromechanical analysis of fatigue and crack growth in carbon-fiber epoxy composites based on mechanical testing" in Hemijska industrija, 74, no. 4 (2020):257-264,
https://doi.org/10.2298/HEMIND200615022J . .