TY  - JOUR
AU  - Dimić, Ivana
AU  - Cvijović-Alagić, Ivana
AU  - Obradović, Nataša
AU  - Petrović, Jelena
AU  - Putić, Slaviša
AU  - Rakin, Marko
AU  - Bugarski, Branko
PY  - 2015
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/3087
AB  - Metallic materials, such as Co-Cr-Mo alloys, are exposed to aggressive conditions in the oral cavity that represents an ideal environment for metallic ion release and biodegradation. The metallic ions released from dental materials can cause local and/or systemic adverse effects in the human body. Therefore, dental materials are required to possess appropriate mechanical, physical, chemical and biological properties. The biocompatibility of metallic materials is very important for dental applications. Accordingly, the aim of this study was to examine metallic ion release and cytotoxicity of Co-30Cr-5Mo cast alloy as the initial phase of biocompatibility evaluation. Determination of the viability of human (MRC-5) and animal (L929) fibroblast cells were conducted using three in vitro test methods: the colorimetric methyl-thiazol-tetrazolium (MTT) test, the dye exclusion test (DET) and the agar diffusion test (ADT). Furthermore, the morphology and growth of the cells were analyzed using scanning electron microscopy (SEM). The obtained results indicated that Co-30Cr-5Mo alloy did not release harmful elements in concentrations high enough to have detrimental effects on human and animal fibroblasts under the given experimental conditions. Moreover, the fibroblast cells showed good adhesion on the surface of the Co-30Cr-5Mo alloy. Therefore, it could be concluded that Co-30Cr-5Mo alloy is a biocompatible material that could be safely used in dentistry.
PB  - Srpsko hemijsko društvo, Beograd
T2  - Journal of the Serbian Chemical Society
T1  - In vitro biocompatibility assessment of Co-Cr-Mo dental cast alloy
EP  - 1552
IS  - 12
SP  - 1541
VL  - 80
DO  - 10.2298/JSC150505070M
ER  - 

@article{
author = "Dimić, Ivana and Cvijović-Alagić, Ivana and Obradović, Nataša and Petrović, Jelena and Putić, Slaviša and Rakin, Marko and Bugarski, Branko",
year = "2015",
abstract = "Metallic materials, such as Co-Cr-Mo alloys, are exposed to aggressive conditions in the oral cavity that represents an ideal environment for metallic ion release and biodegradation. The metallic ions released from dental materials can cause local and/or systemic adverse effects in the human body. Therefore, dental materials are required to possess appropriate mechanical, physical, chemical and biological properties. The biocompatibility of metallic materials is very important for dental applications. Accordingly, the aim of this study was to examine metallic ion release and cytotoxicity of Co-30Cr-5Mo cast alloy as the initial phase of biocompatibility evaluation. Determination of the viability of human (MRC-5) and animal (L929) fibroblast cells were conducted using three in vitro test methods: the colorimetric methyl-thiazol-tetrazolium (MTT) test, the dye exclusion test (DET) and the agar diffusion test (ADT). Furthermore, the morphology and growth of the cells were analyzed using scanning electron microscopy (SEM). The obtained results indicated that Co-30Cr-5Mo alloy did not release harmful elements in concentrations high enough to have detrimental effects on human and animal fibroblasts under the given experimental conditions. Moreover, the fibroblast cells showed good adhesion on the surface of the Co-30Cr-5Mo alloy. Therefore, it could be concluded that Co-30Cr-5Mo alloy is a biocompatible material that could be safely used in dentistry.",
publisher = "Srpsko hemijsko društvo, Beograd",
journal = "Journal of the Serbian Chemical Society",
title = "In vitro biocompatibility assessment of Co-Cr-Mo dental cast alloy",
pages = "1552-1541",
number = "12",
volume = "80",
doi = "10.2298/JSC150505070M"
}

Dimić, I., Cvijović-Alagić, I., Obradović, N., Petrović, J., Putić, S., Rakin, M.,& Bugarski, B.. (2015). In vitro biocompatibility assessment of Co-Cr-Mo dental cast alloy. in Journal of the Serbian Chemical Society
Srpsko hemijsko društvo, Beograd., 80(12), 1541-1552.
https://doi.org/10.2298/JSC150505070M

Dimić I, Cvijović-Alagić I, Obradović N, Petrović J, Putić S, Rakin M, Bugarski B. In vitro biocompatibility assessment of Co-Cr-Mo dental cast alloy. in Journal of the Serbian Chemical Society. 2015;80(12):1541-1552.
doi:10.2298/JSC150505070M .

Dimić, Ivana, Cvijović-Alagić, Ivana, Obradović, Nataša, Petrović, Jelena, Putić, Slaviša, Rakin, Marko, Bugarski, Branko, "In vitro biocompatibility assessment of Co-Cr-Mo dental cast alloy" in Journal of the Serbian Chemical Society, 80, no. 12 (2015):1541-1552,
https://doi.org/10.2298/JSC150505070M . .

TY  - JOUR
AU  - Ljubić, Darko
AU  - Stamenović, Marina
AU  - Smithson, Chad
AU  - Nujkić, Maja
AU  - Petrović, Jelena
AU  - Putić, Slaviša
PY  - 2014
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/2590
AB  - The properties of polymer nanocomposites exceed the properties of common composite materials due to the nanoscale size and morphology of the fillers used. Particulate fillersare commonly used in polymers forimproved mechanical and thermal properties, as well as modified electrical properties and cost reduction. Organically modified layered clays, such asmontmorillonite, are among the most widely used fillers for the improvement of polymer matrices. Presented in this review are some of the most studied clay nanocomposites including clay-polyolefin, clay-polyester and clay-thermoplastic polyurethanenanocomposites. Additionally, the properties of clay-biopolymers nanocomposites will also be discussed.
AB  - Svojstva polimernih nanokompozita prevazilaze svojstva uobičajenih kompozitnih materijala zbog nanodimenzija i morfologije upotrebljenih punioca. Čestični punioci se uglavnom koriste u cilju poboljšnja mehaničkih i toplotnih svojstava polimera, kao i za modifikovanje električnih svojstava polimerne matrice i smanjenja cene koštanja. Organski modifikovane slojevite gline, kao što je montmorilonit, su između ostalih, najzastupljeniji punioci u upotrebi za poboljšanje svojstava polimernih matrica. Ovim preglednim radom biće prikazani najznačajniji i najviše proučavani glina-polimerni nanokompoziti, kao što su glina-poliolefini, glina-poliestar i glina-termoplastični poliuretan nanokompoziti. Takođe, svojstva biopolimer-glina nanokompozita biće predstavljena i razmatrana u radu.
PB  - Engineering Society for Corrosion, Belgrade, Serbia
T2  - Zaštita materijala
T1  - Organoclay-polymer nanocomposites
T1  - Organoglina-polimerni nanokompoziti
EP  - 132
IS  - 2
SP  - 127
VL  - 55
DO  - 10.5937/ZasMat1402127L
ER  - 

@article{
author = "Ljubić, Darko and Stamenović, Marina and Smithson, Chad and Nujkić, Maja and Petrović, Jelena and Putić, Slaviša",
year = "2014",
abstract = "The properties of polymer nanocomposites exceed the properties of common composite materials due to the nanoscale size and morphology of the fillers used. Particulate fillersare commonly used in polymers forimproved mechanical and thermal properties, as well as modified electrical properties and cost reduction. Organically modified layered clays, such asmontmorillonite, are among the most widely used fillers for the improvement of polymer matrices. Presented in this review are some of the most studied clay nanocomposites including clay-polyolefin, clay-polyester and clay-thermoplastic polyurethanenanocomposites. Additionally, the properties of clay-biopolymers nanocomposites will also be discussed., Svojstva polimernih nanokompozita prevazilaze svojstva uobičajenih kompozitnih materijala zbog nanodimenzija i morfologije upotrebljenih punioca. Čestični punioci se uglavnom koriste u cilju poboljšnja mehaničkih i toplotnih svojstava polimera, kao i za modifikovanje električnih svojstava polimerne matrice i smanjenja cene koštanja. Organski modifikovane slojevite gline, kao što je montmorilonit, su između ostalih, najzastupljeniji punioci u upotrebi za poboljšanje svojstava polimernih matrica. Ovim preglednim radom biće prikazani najznačajniji i najviše proučavani glina-polimerni nanokompoziti, kao što su glina-poliolefini, glina-poliestar i glina-termoplastični poliuretan nanokompoziti. Takođe, svojstva biopolimer-glina nanokompozita biće predstavljena i razmatrana u radu.",
publisher = "Engineering Society for Corrosion, Belgrade, Serbia",
journal = "Zaštita materijala",
title = "Organoclay-polymer nanocomposites, Organoglina-polimerni nanokompoziti",
pages = "132-127",
number = "2",
volume = "55",
doi = "10.5937/ZasMat1402127L"
}

Ljubić, D., Stamenović, M., Smithson, C., Nujkić, M., Petrović, J.,& Putić, S.. (2014). Organoclay-polymer nanocomposites. in Zaštita materijala
Engineering Society for Corrosion, Belgrade, Serbia., 55(2), 127-132.
https://doi.org/10.5937/ZasMat1402127L

Ljubić D, Stamenović M, Smithson C, Nujkić M, Petrović J, Putić S. Organoclay-polymer nanocomposites. in Zaštita materijala. 2014;55(2):127-132.
doi:10.5937/ZasMat1402127L .

Ljubić, Darko, Stamenović, Marina, Smithson, Chad, Nujkić, Maja, Petrović, Jelena, Putić, Slaviša, "Organoclay-polymer nanocomposites" in Zaštita materijala, 55, no. 2 (2014):127-132,
https://doi.org/10.5937/ZasMat1402127L . .

TY  - JOUR
AU  - Krstić, Miljana
AU  - Ilić, Dragoljub
AU  - Bekrić, Dragoljub
AU  - Petrović, Jelena
AU  - Vujičić, Ivica
AU  - Putić, Slaviša
PY  - 2014
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/2597
AB  - The object and purpose of this work is the micromechanical analysis of failures caused by mechanical tests of laminate glass-epoxy composite material in bending. The structure of glass-epoxy composite material is a glass fabric 280 g / m2, 'twill weave', width 100 cm, type - Interglas 92125 and epoxy resin type MGS L-135. Samples are shaped manual method with 35% volume fraction of fibers. Previous mechanical tests were obtained relevant data on tensile and flexural mechanical properties. By analyzing the images of fracture surfaces of larger magnification with a scanning electron microscope (SEM) will be performed micromechanical analysis that will lead to the knowledge of the mechanisms of damage and crack growth to final fracture in action bending loads.
AB  - Predmet i cilj ovog rada predstavlja mikromehanička analiza lomova nastalih mehaničkim ispitivanjima laminatnog staklo-epoksi kompozitnog materijala na savijanje. Struktura staklo-epoksi kompozitnog materijala je stakleno platno 280 g/m2, 'twill tkanje', širine 100 cm, tip - Interglas 92125 i epoksi smola tip MGS L-135. Uzorci su oblikovani ručnom metodom sa 35% zapreminskog udela vlakana. Prethodnim mehaničkim ispitivanjima su dobijeni relevantni podaci o zateznim i savojnim mehaničkim svojstvima. Analizom sa fotografija na prelomnim površinama većih uvećanja i sa skening elektronskog mikroskopa (SEM) biće izvedena mikromehanička analiza kojom će se doći do saznanja o mehanizmima oštećenja i razvoju prsline do konačnog loma pri delovanju savojnog opterećenja.
PB  - Engineering Society for Corrosion, Belgrade, Serbia
T2  - Zaštita materijala
T1  - Micromechanical fracture analysis of laminated glass-epoxy composite material tested by bending
T1  - Mikromehanička analiza loma laminatnog staklo-epoksi kompozitnog materijala ispitivanog savijanjem
EP  - 340
IS  - 3
SP  - 335
VL  - 55
DO  - 10.5937/ZasMat1403335K
ER  - 

@article{
author = "Krstić, Miljana and Ilić, Dragoljub and Bekrić, Dragoljub and Petrović, Jelena and Vujičić, Ivica and Putić, Slaviša",
year = "2014",
abstract = "The object and purpose of this work is the micromechanical analysis of failures caused by mechanical tests of laminate glass-epoxy composite material in bending. The structure of glass-epoxy composite material is a glass fabric 280 g / m2, 'twill weave', width 100 cm, type - Interglas 92125 and epoxy resin type MGS L-135. Samples are shaped manual method with 35% volume fraction of fibers. Previous mechanical tests were obtained relevant data on tensile and flexural mechanical properties. By analyzing the images of fracture surfaces of larger magnification with a scanning electron microscope (SEM) will be performed micromechanical analysis that will lead to the knowledge of the mechanisms of damage and crack growth to final fracture in action bending loads., Predmet i cilj ovog rada predstavlja mikromehanička analiza lomova nastalih mehaničkim ispitivanjima laminatnog staklo-epoksi kompozitnog materijala na savijanje. Struktura staklo-epoksi kompozitnog materijala je stakleno platno 280 g/m2, 'twill tkanje', širine 100 cm, tip - Interglas 92125 i epoksi smola tip MGS L-135. Uzorci su oblikovani ručnom metodom sa 35% zapreminskog udela vlakana. Prethodnim mehaničkim ispitivanjima su dobijeni relevantni podaci o zateznim i savojnim mehaničkim svojstvima. Analizom sa fotografija na prelomnim površinama većih uvećanja i sa skening elektronskog mikroskopa (SEM) biće izvedena mikromehanička analiza kojom će se doći do saznanja o mehanizmima oštećenja i razvoju prsline do konačnog loma pri delovanju savojnog opterećenja.",
publisher = "Engineering Society for Corrosion, Belgrade, Serbia",
journal = "Zaštita materijala",
title = "Micromechanical fracture analysis of laminated glass-epoxy composite material tested by bending, Mikromehanička analiza loma laminatnog staklo-epoksi kompozitnog materijala ispitivanog savijanjem",
pages = "340-335",
number = "3",
volume = "55",
doi = "10.5937/ZasMat1403335K"
}

Krstić, M., Ilić, D., Bekrić, D., Petrović, J., Vujičić, I.,& Putić, S.. (2014). Micromechanical fracture analysis of laminated glass-epoxy composite material tested by bending. in Zaštita materijala
Engineering Society for Corrosion, Belgrade, Serbia., 55(3), 335-340.
https://doi.org/10.5937/ZasMat1403335K

Krstić M, Ilić D, Bekrić D, Petrović J, Vujičić I, Putić S. Micromechanical fracture analysis of laminated glass-epoxy composite material tested by bending. in Zaštita materijala. 2014;55(3):335-340.
doi:10.5937/ZasMat1403335K .

Krstić, Miljana, Ilić, Dragoljub, Bekrić, Dragoljub, Petrović, Jelena, Vujičić, Ivica, Putić, Slaviša, "Micromechanical fracture analysis of laminated glass-epoxy composite material tested by bending" in Zaštita materijala, 55, no. 3 (2014):335-340,
https://doi.org/10.5937/ZasMat1403335K . .

TY  - JOUR
AU  - Stamenović, Marina
AU  - Petrović, Jelena
AU  - Dimić, Ivana
AU  - Putić, Slaviša
PY  - 2013
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/2354
AB  - The use of composite material increases. Composite materials are used in a wide range of applications such as automotive, aerospace and other industries. But they have not been properly recycled, due to their inherent nature of heterogeneity. The current and future waste management and environmental legislations in EU require all engineering materials to be properly recovered and recycled from end-of-life (EOL) products. Recycling will ultimately lead to resource and energy saving. This work presents different possibilities for recycling composite. Various technologies have been developed: mechanical recycling, thermal recycling, and chemical recycling, depending on the applied operations during the recycling process. Mechanical recycling techniques involve the use of grinding techniques to comminute the scrap material and produce recycled products in different size ranges suitable for reuse as fillers or partial reinforcement in new composite material. Thermal techniques involve the use of heat resulting in releasing certain amounts of energy. Chemical recycling involves the process for chemical depolymerisation or removal of the matrix by using chemical dissolution reagents for liberation of fibres which can be reused. The removed matrix can process a useful product using a specific chemical procedures. However a lack of adequate markets, high recycling cost, and lower quality of the recyclates are the major commercialization barriers.
AB  - Upotreba kompozitnih materijala je u stalnom porastu. Kompozitni materijali imaju široku primenu u različitim granama industrije, kao što su automobilska, avio industrija i druge. Međutim, oni se još uvek ne recikliraju adekvatno, najviše zbog njihove prirode, tj. heterogene strukture. Regulative koje se odnose na upravljanje otpadom i zaštitu životne sredine u Evropskoj Uniji propisuju da svi inženjerski materijali moraju biti reciklirani na kraju svog životnog veka, čime se postiže značajna ušteda energije. U ovom radu su prikazane različite mogućnosti reciklaže kompozitnih materijala. Postupci reciklaže mogu biti mehanički, toplotni i hemijski, u zavisnosti od primenjene operacije tokom procesa reciklaže. Mehanički postupci podrazumevaju korišćenje tehnika usitnjavanja kompozitnih materijala kako bi se dobili reciklati odgovarajućih dimenzija, nakon čega se isti mogu koristiti kao punioci ili kao ojačanja u novim kompozitnim materijalima. Termički postupci podrazumevaju korišćenje toplote tokom procesa reciklaže što rezultira oslobađanjem određene količine energije. U okviru hemijskih postupaka reciklaže primenjuje se proces depolimerizacije i uklanjanja matrice iz kompozita pomoću različitih reagenasa, čime se izdvajaju vlakna koja se mogu ponovo upotrebiti, a uklonjena matrica se određenim hemijskim postupcima može preraditi u koristan proizvod. Ipak, nedostatak adekvatnog tržišta, visoki troškovi reciklaže i neodgovarajući kvalitet reciklata su glavne prepreke komercijalizaciji reciklažnih postupaka kompozita.
PB  - Naučno-stručno društvo za zaštitu životne sredine Srbije - Ecologica, Beograd
T2  - Ecologica
T1  - Possibilities of composite materials recycling
T1  - Mogućnosti reciklaže kompozitnih materijala
EP  - 682
IS  - 72
SP  - 678
VL  - 20
UR  - https://hdl.handle.net/21.15107/rcub_technorep_2354
ER  - 

@article{
author = "Stamenović, Marina and Petrović, Jelena and Dimić, Ivana and Putić, Slaviša",
year = "2013",
abstract = "The use of composite material increases. Composite materials are used in a wide range of applications such as automotive, aerospace and other industries. But they have not been properly recycled, due to their inherent nature of heterogeneity. The current and future waste management and environmental legislations in EU require all engineering materials to be properly recovered and recycled from end-of-life (EOL) products. Recycling will ultimately lead to resource and energy saving. This work presents different possibilities for recycling composite. Various technologies have been developed: mechanical recycling, thermal recycling, and chemical recycling, depending on the applied operations during the recycling process. Mechanical recycling techniques involve the use of grinding techniques to comminute the scrap material and produce recycled products in different size ranges suitable for reuse as fillers or partial reinforcement in new composite material. Thermal techniques involve the use of heat resulting in releasing certain amounts of energy. Chemical recycling involves the process for chemical depolymerisation or removal of the matrix by using chemical dissolution reagents for liberation of fibres which can be reused. The removed matrix can process a useful product using a specific chemical procedures. However a lack of adequate markets, high recycling cost, and lower quality of the recyclates are the major commercialization barriers., Upotreba kompozitnih materijala je u stalnom porastu. Kompozitni materijali imaju široku primenu u različitim granama industrije, kao što su automobilska, avio industrija i druge. Međutim, oni se još uvek ne recikliraju adekvatno, najviše zbog njihove prirode, tj. heterogene strukture. Regulative koje se odnose na upravljanje otpadom i zaštitu životne sredine u Evropskoj Uniji propisuju da svi inženjerski materijali moraju biti reciklirani na kraju svog životnog veka, čime se postiže značajna ušteda energije. U ovom radu su prikazane različite mogućnosti reciklaže kompozitnih materijala. Postupci reciklaže mogu biti mehanički, toplotni i hemijski, u zavisnosti od primenjene operacije tokom procesa reciklaže. Mehanički postupci podrazumevaju korišćenje tehnika usitnjavanja kompozitnih materijala kako bi se dobili reciklati odgovarajućih dimenzija, nakon čega se isti mogu koristiti kao punioci ili kao ojačanja u novim kompozitnim materijalima. Termički postupci podrazumevaju korišćenje toplote tokom procesa reciklaže što rezultira oslobađanjem određene količine energije. U okviru hemijskih postupaka reciklaže primenjuje se proces depolimerizacije i uklanjanja matrice iz kompozita pomoću različitih reagenasa, čime se izdvajaju vlakna koja se mogu ponovo upotrebiti, a uklonjena matrica se određenim hemijskim postupcima može preraditi u koristan proizvod. Ipak, nedostatak adekvatnog tržišta, visoki troškovi reciklaže i neodgovarajući kvalitet reciklata su glavne prepreke komercijalizaciji reciklažnih postupaka kompozita.",
publisher = "Naučno-stručno društvo za zaštitu životne sredine Srbije - Ecologica, Beograd",
journal = "Ecologica",
title = "Possibilities of composite materials recycling, Mogućnosti reciklaže kompozitnih materijala",
pages = "682-678",
number = "72",
volume = "20",
url = "https://hdl.handle.net/21.15107/rcub_technorep_2354"
}

Stamenović, M., Petrović, J., Dimić, I.,& Putić, S.. (2013). Possibilities of composite materials recycling. in Ecologica
Naučno-stručno društvo za zaštitu životne sredine Srbije - Ecologica, Beograd., 20(72), 678-682.
https://hdl.handle.net/21.15107/rcub_technorep_2354

Stamenović M, Petrović J, Dimić I, Putić S. Possibilities of composite materials recycling. in Ecologica. 2013;20(72):678-682.
https://hdl.handle.net/21.15107/rcub_technorep_2354 .

Stamenović, Marina, Petrović, Jelena, Dimić, Ivana, Putić, Slaviša, "Possibilities of composite materials recycling" in Ecologica, 20, no. 72 (2013):678-682,
https://hdl.handle.net/21.15107/rcub_technorep_2354 .

TY  - JOUR
AU  - Petrović, Jelena M.
AU  - Bekrić, Dragoljub
AU  - Vujičić, Ivica T.
AU  - Dimić, Ivana
AU  - Putić, Slaviša
PY  - 2013
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/2382
AB  - The main objective of the research presented in this paper was to carry out a statistical-mechanical analysis concerning the tensile test of glass-epoxy composite materials in order to calculate their relevant tension properties and micromechanical structure destruction process. The analysis was done at room temperature, and its results were derived based on the structure of the glass woven 280 g/m², 'twill texture' with the width value of 100 cm, type - Interglass 92125, and epoxy resin type MGS L 135. Samples were shaped by hands with 35% of fabric volume part. The consumed portion of resin was 220 g/m², the thickness of the laminate was 0.308 mm, and the mass of the laminate was 500 g/m2. There were a total of eight layers built in the panel. The micromechanical analysis was derived from the crack surfaces data collected on a scanning electronic microscope, and it showed the mechanisms of damage, and development of cracks until the occurrence of the final break under the tension load.
AB  - Predmet i cilj istraživanja prikazanih u ovom radu su statičko mehanička ispitivanja na zatezanje staklo-epoksi kompozitnog materijala radi dobijanja njegovih relevantnih zateznih svojstava i mikromehaničke analize oštećenja strukture. Ispitivanja su izvedena na sobnoj temperaturi. Analizirani su kompoziti na osnovu epoksidne smole tipa MGS LR 135 i staklenog platna 280 g/m², 'twill' širine 100 cm, tip - Interglas 92125. Uzorci su oblikovani ručnom metodom sa 35% zapreminskog udela vlakana. Utrošak smole je bio 220 g/m², debljina laminata 0,308 mm a masa laminata 500 g/m2. Ukupno je ugrađeno 8 platana u panelu. Analizom prelomnih površina na skening elektronskom mikroskopu izvedena je mikromehanička analiza kojom se došlo do saznanja o mehanizmima oštećenja i razvoju prsline do konačnog loma pri delovanju zateznog opterećenja.
PB  - Faculty of Technology, Novi Sad
T2  - Acta periodica technologica
T1  - Microstructural characterization of glass-epoxy composites subjected to tensile testing
T1  - Mikromehanička karakterizacija staklo-epoksi kompozita izloženog zateznom opterećenju
EP  - 162
IS  - 44
SP  - 151
DO  - 10.2298/APT1344151P
ER  - 

@article{
author = "Petrović, Jelena M. and Bekrić, Dragoljub and Vujičić, Ivica T. and Dimić, Ivana and Putić, Slaviša",
year = "2013",
abstract = "The main objective of the research presented in this paper was to carry out a statistical-mechanical analysis concerning the tensile test of glass-epoxy composite materials in order to calculate their relevant tension properties and micromechanical structure destruction process. The analysis was done at room temperature, and its results were derived based on the structure of the glass woven 280 g/m², 'twill texture' with the width value of 100 cm, type - Interglass 92125, and epoxy resin type MGS L 135. Samples were shaped by hands with 35% of fabric volume part. The consumed portion of resin was 220 g/m², the thickness of the laminate was 0.308 mm, and the mass of the laminate was 500 g/m2. There were a total of eight layers built in the panel. The micromechanical analysis was derived from the crack surfaces data collected on a scanning electronic microscope, and it showed the mechanisms of damage, and development of cracks until the occurrence of the final break under the tension load., Predmet i cilj istraživanja prikazanih u ovom radu su statičko mehanička ispitivanja na zatezanje staklo-epoksi kompozitnog materijala radi dobijanja njegovih relevantnih zateznih svojstava i mikromehaničke analize oštećenja strukture. Ispitivanja su izvedena na sobnoj temperaturi. Analizirani su kompoziti na osnovu epoksidne smole tipa MGS LR 135 i staklenog platna 280 g/m², 'twill' širine 100 cm, tip - Interglas 92125. Uzorci su oblikovani ručnom metodom sa 35% zapreminskog udela vlakana. Utrošak smole je bio 220 g/m², debljina laminata 0,308 mm a masa laminata 500 g/m2. Ukupno je ugrađeno 8 platana u panelu. Analizom prelomnih površina na skening elektronskom mikroskopu izvedena je mikromehanička analiza kojom se došlo do saznanja o mehanizmima oštećenja i razvoju prsline do konačnog loma pri delovanju zateznog opterećenja.",
publisher = "Faculty of Technology, Novi Sad",
journal = "Acta periodica technologica",
title = "Microstructural characterization of glass-epoxy composites subjected to tensile testing, Mikromehanička karakterizacija staklo-epoksi kompozita izloženog zateznom opterećenju",
pages = "162-151",
number = "44",
doi = "10.2298/APT1344151P"
}

Petrović, J. M., Bekrić, D., Vujičić, I. T., Dimić, I.,& Putić, S.. (2013). Microstructural characterization of glass-epoxy composites subjected to tensile testing. in Acta periodica technologica
Faculty of Technology, Novi Sad.(44), 151-162.
https://doi.org/10.2298/APT1344151P

Petrović JM, Bekrić D, Vujičić IT, Dimić I, Putić S. Microstructural characterization of glass-epoxy composites subjected to tensile testing. in Acta periodica technologica. 2013;(44):151-162.
doi:10.2298/APT1344151P .

Petrović, Jelena M., Bekrić, Dragoljub, Vujičić, Ivica T., Dimić, Ivana, Putić, Slaviša, "Microstructural characterization of glass-epoxy composites subjected to tensile testing" in Acta periodica technologica, no. 44 (2013):151-162,
https://doi.org/10.2298/APT1344151P . .

TY  - JOUR
AU  - Petrović, Jelena M.
AU  - Ljubić, Darko
AU  - Stamenović, Marina
AU  - Dimić, Ivana
AU  - Putić, Slaviša
PY  - 2012
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/2033
AB  - The significance of composite materials and their applications are mainly due to their good properties. This imposes the need for their recycling, thus extending their lifetime. Once used composite material will be disposed as a waste at the end of it service life. After recycling, this kind of waste can be used as raw materials for the production of same material, which raises their applicability. This indicates a great importance of recycling as a method of the renowal of composite materials. This study represents a contribution to the field of mechanical properties of the recycled composite materials. The tension mechanical properties (tensile strength and modulus of elasticity) of once used and disposed glass-epoxy composite material were compared before and after the recycling. The obtained results from mechanical tests confirmed that the applied recycling method was suitable for glass-epoxy composite materials. In respect to the tensile strength and modulus of elasticity it can be further assessed the possibility of use of recycled glass-epoxy composite materials.
AB  - Primena kompozitnih materijala, zahvaljujući svojim dobrim svojstvima, svakim danom postaje sve veća što nameće pitanje mogućnosti njihovog recikliranja i time produženja njihovog životnog veka. Nakon jedanput korišćenog kompozitnog materijala u određene svrhe vrši se njihovo odlaganje u vidu otpada. Ovakav otpad uglavnom predstavlja sirovinu za proizvodnju iste vrste kompozita postupkom reciklaže, što povećava njihovu primenu. Imajući tu činjenicu u vidu, ovaj rad predstavlja doprinos u području istraživanja mehaničkih svojstava recikliranih kompozitnih materijala. U radu su prikazana zatezna mehanička svojstva staklo-epoksi kompozitniog materijala koji je bio u eksploataciji, postupak njegove reciklaže, kao i zatezna mehanička svojstva staklo-epoksi recikliranog kompozitnog materijala. Poređenjem rezultata se došlo do podataka o ispravnosti postupka reciklaže staklo-epoksi kompozitnog materijala kao i procene o daljoj mogućnosti primene, uzimajući u obzir dobijene vrednosti za zateznu čvrstoću i modul elastičnosti.
PB  - Faculty of Technology, Novi Sad
T2  - Acta periodica technologica
T1  - Tension mechanical properties of recycled glass-epoxy composite material
T1  - Mehanička svojstava recikliranog staklo-epoksi kompozitnog materijala
EP  - 198
IS  - 43
SP  - 189
DO  - 10.2298/APT1243189P
ER  - 

@article{
author = "Petrović, Jelena M. and Ljubić, Darko and Stamenović, Marina and Dimić, Ivana and Putić, Slaviša",
year = "2012",
abstract = "The significance of composite materials and their applications are mainly due to their good properties. This imposes the need for their recycling, thus extending their lifetime. Once used composite material will be disposed as a waste at the end of it service life. After recycling, this kind of waste can be used as raw materials for the production of same material, which raises their applicability. This indicates a great importance of recycling as a method of the renowal of composite materials. This study represents a contribution to the field of mechanical properties of the recycled composite materials. The tension mechanical properties (tensile strength and modulus of elasticity) of once used and disposed glass-epoxy composite material were compared before and after the recycling. The obtained results from mechanical tests confirmed that the applied recycling method was suitable for glass-epoxy composite materials. In respect to the tensile strength and modulus of elasticity it can be further assessed the possibility of use of recycled glass-epoxy composite materials., Primena kompozitnih materijala, zahvaljujući svojim dobrim svojstvima, svakim danom postaje sve veća što nameće pitanje mogućnosti njihovog recikliranja i time produženja njihovog životnog veka. Nakon jedanput korišćenog kompozitnog materijala u određene svrhe vrši se njihovo odlaganje u vidu otpada. Ovakav otpad uglavnom predstavlja sirovinu za proizvodnju iste vrste kompozita postupkom reciklaže, što povećava njihovu primenu. Imajući tu činjenicu u vidu, ovaj rad predstavlja doprinos u području istraživanja mehaničkih svojstava recikliranih kompozitnih materijala. U radu su prikazana zatezna mehanička svojstva staklo-epoksi kompozitniog materijala koji je bio u eksploataciji, postupak njegove reciklaže, kao i zatezna mehanička svojstva staklo-epoksi recikliranog kompozitnog materijala. Poređenjem rezultata se došlo do podataka o ispravnosti postupka reciklaže staklo-epoksi kompozitnog materijala kao i procene o daljoj mogućnosti primene, uzimajući u obzir dobijene vrednosti za zateznu čvrstoću i modul elastičnosti.",
publisher = "Faculty of Technology, Novi Sad",
journal = "Acta periodica technologica",
title = "Tension mechanical properties of recycled glass-epoxy composite material, Mehanička svojstava recikliranog staklo-epoksi kompozitnog materijala",
pages = "198-189",
number = "43",
doi = "10.2298/APT1243189P"
}

Petrović, J. M., Ljubić, D., Stamenović, M., Dimić, I.,& Putić, S.. (2012). Tension mechanical properties of recycled glass-epoxy composite material. in Acta periodica technologica
Faculty of Technology, Novi Sad.(43), 189-198.
https://doi.org/10.2298/APT1243189P

Petrović JM, Ljubić D, Stamenović M, Dimić I, Putić S. Tension mechanical properties of recycled glass-epoxy composite material. in Acta periodica technologica. 2012;(43):189-198.
doi:10.2298/APT1243189P .

Petrović, Jelena M., Ljubić, Darko, Stamenović, Marina, Dimić, Ivana, Putić, Slaviša, "Tension mechanical properties of recycled glass-epoxy composite material" in Acta periodica technologica, no. 43 (2012):189-198,
https://doi.org/10.2298/APT1243189P . .

TY  - JOUR
AU  - Putić, Slaviša
AU  - Stamenović, Marina
AU  - Petrović, Jelena M.
AU  - Rakin, Marko
AU  - Međo, Bojan
PY  - 2011
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/1819
AB  - Construction materials, traditionally used in process equipment, are today successfully replaced by composite materials. Hence, many pipes are made of these materials. The subject of this study was the influence of liquids on the state of stresses and tensile strengths in the longitudinal and circumferential direction of glass-polyester pipes of a definite structure and known fabrication process. These analyses are of great importance for the use of glass-polyester pipes in the chemical industry. The tensile properties (the ultimate tensile strength and the modulus of elasticity) were tested and determined for specimens cut out of the pipes; flat specimens for the tensile properties in the longitudinal direction and ring specimens for the tensile properties in the circumferential direction. First, the tension test was performed on virgin samples (without the influence of any liquid), to obtain knowledge about the original tensile properties of the material composite studied. Subsequently, the specimens were soaked in alkaline solutions: sodium hydroxide (strong alkali) and ammonium hydroxide (weak alkali). These solutions were selected because of their considerable difference in pH values. The specimens and rings were left for 3, 10, 30 and 60 days in each liquid at room temperature. Then, the samples were tested on tension by the standard testing procedure. A comparison of the obtained results was made based on the pH values of the aggressive media in which the examined material had been soaked, as well as based on the original tensile properties and the number of days of treatment. Micromechanical analyses of sample breakage helped in the elucidation of the influence of the liquids on the structure of the composite pipe and enabled models and mechanisms that produced the change of strength to be proposed.
AB  - Konstrukcioni materijali tradicionalno korišćeni u procesnoj opremi su danas uspešno zamenjeni kompozitnim materijalima, tako da su i mnoge cevi izrađene od ovih materijala. Uticaj baznih tečnosti na stanje napona i zatezne čvrstoće u uzdužnom i obimnom pravcu staklo-poliester kompozitnih cevi je tema ovog rada. Cevi su definisane strukture i poznatog procesa proizvodnje. Ove analize su od velikog značaja za korišćenje staklo-poliester cevi u hemijskoj industriji. Zatezne osobine (zatezna čvrstoća i modul elastičnosti) su eksperimentalno ispitivane na isečenim uzorcima; ravni uzorci u udužnom pravcu, a uzorci u obliku prstena u obimnom pravcu. Ispitivanje je prvo izvođeno na uzorcima koji nisu bili izloženi uticaju rastvora baza da bi se došlo do saznanja o prvobitnim zateznim svojstvima ispitivanih kompozitnih materijala. Nakon toga, uzorci su stavljeni u rastvore baza natrijum-hidroksida (jaka baza, pH=14) i amonijum hidroksida (slaba baza, pH=12) 3, 10, 30 i 60 dana na sobnoj temperaturi. Nakon toga su ispitivani na zatezanje prema standardnoj proceduri. Poređenje dobijenih rezultata je izvedeno na osnovu rN vrednosti rastvora i broja dana izlaganja rastvorima baza, a na osnovu originalnih zateznih osobina. Mikromehanička analiza se izvodila u odnosu na fotografije sa skening eloktronskog mikroskopa sa prelomnih površina čime se došlo do podataka o uticaju rastvora baza na strukturu kompozitnih cevi i modele i mehanizme koji su dovodili do promene zateznih svojstava.
PB  - Faculty of Technology, Novi Sad
T2  - Acta periodica technologica
T1  - Effect of alkaline solutions on the tensile properties of glass-polyester pipes
T1  - Uticaj baznih rastvora na zatezne karakteristike staklo-poliester kompozitnih cevi
EP  - 195
IS  - 42
SP  - 185
DO  - 10.2298/APT1142185P
ER  - 

@article{
author = "Putić, Slaviša and Stamenović, Marina and Petrović, Jelena M. and Rakin, Marko and Međo, Bojan",
year = "2011",
abstract = "Construction materials, traditionally used in process equipment, are today successfully replaced by composite materials. Hence, many pipes are made of these materials. The subject of this study was the influence of liquids on the state of stresses and tensile strengths in the longitudinal and circumferential direction of glass-polyester pipes of a definite structure and known fabrication process. These analyses are of great importance for the use of glass-polyester pipes in the chemical industry. The tensile properties (the ultimate tensile strength and the modulus of elasticity) were tested and determined for specimens cut out of the pipes; flat specimens for the tensile properties in the longitudinal direction and ring specimens for the tensile properties in the circumferential direction. First, the tension test was performed on virgin samples (without the influence of any liquid), to obtain knowledge about the original tensile properties of the material composite studied. Subsequently, the specimens were soaked in alkaline solutions: sodium hydroxide (strong alkali) and ammonium hydroxide (weak alkali). These solutions were selected because of their considerable difference in pH values. The specimens and rings were left for 3, 10, 30 and 60 days in each liquid at room temperature. Then, the samples were tested on tension by the standard testing procedure. A comparison of the obtained results was made based on the pH values of the aggressive media in which the examined material had been soaked, as well as based on the original tensile properties and the number of days of treatment. Micromechanical analyses of sample breakage helped in the elucidation of the influence of the liquids on the structure of the composite pipe and enabled models and mechanisms that produced the change of strength to be proposed., Konstrukcioni materijali tradicionalno korišćeni u procesnoj opremi su danas uspešno zamenjeni kompozitnim materijalima, tako da su i mnoge cevi izrađene od ovih materijala. Uticaj baznih tečnosti na stanje napona i zatezne čvrstoće u uzdužnom i obimnom pravcu staklo-poliester kompozitnih cevi je tema ovog rada. Cevi su definisane strukture i poznatog procesa proizvodnje. Ove analize su od velikog značaja za korišćenje staklo-poliester cevi u hemijskoj industriji. Zatezne osobine (zatezna čvrstoća i modul elastičnosti) su eksperimentalno ispitivane na isečenim uzorcima; ravni uzorci u udužnom pravcu, a uzorci u obliku prstena u obimnom pravcu. Ispitivanje je prvo izvođeno na uzorcima koji nisu bili izloženi uticaju rastvora baza da bi se došlo do saznanja o prvobitnim zateznim svojstvima ispitivanih kompozitnih materijala. Nakon toga, uzorci su stavljeni u rastvore baza natrijum-hidroksida (jaka baza, pH=14) i amonijum hidroksida (slaba baza, pH=12) 3, 10, 30 i 60 dana na sobnoj temperaturi. Nakon toga su ispitivani na zatezanje prema standardnoj proceduri. Poređenje dobijenih rezultata je izvedeno na osnovu rN vrednosti rastvora i broja dana izlaganja rastvorima baza, a na osnovu originalnih zateznih osobina. Mikromehanička analiza se izvodila u odnosu na fotografije sa skening eloktronskog mikroskopa sa prelomnih površina čime se došlo do podataka o uticaju rastvora baza na strukturu kompozitnih cevi i modele i mehanizme koji su dovodili do promene zateznih svojstava.",
publisher = "Faculty of Technology, Novi Sad",
journal = "Acta periodica technologica",
title = "Effect of alkaline solutions on the tensile properties of glass-polyester pipes, Uticaj baznih rastvora na zatezne karakteristike staklo-poliester kompozitnih cevi",
pages = "195-185",
number = "42",
doi = "10.2298/APT1142185P"
}

Putić, S., Stamenović, M., Petrović, J. M., Rakin, M.,& Međo, B.. (2011). Effect of alkaline solutions on the tensile properties of glass-polyester pipes. in Acta periodica technologica
Faculty of Technology, Novi Sad.(42), 185-195.
https://doi.org/10.2298/APT1142185P

Putić S, Stamenović M, Petrović JM, Rakin M, Međo B. Effect of alkaline solutions on the tensile properties of glass-polyester pipes. in Acta periodica technologica. 2011;(42):185-195.
doi:10.2298/APT1142185P .

Putić, Slaviša, Stamenović, Marina, Petrović, Jelena M., Rakin, Marko, Međo, Bojan, "Effect of alkaline solutions on the tensile properties of glass-polyester pipes" in Acta periodica technologica, no. 42 (2011):185-195,
https://doi.org/10.2298/APT1142185P . .