TY  - JOUR
AU  - Sekulić, Danijela R.
AU  - Stevanović, M. M.
PY  - 2011
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/4331
AB  - Hardness and Youngs modulus of the matrix and fibers in carbon/epoxy gamma irradiated and annealed composites were investigated using nanoindentation technique. The Vickers microhardness of the tested composites after irradiation and annealing was studied, as well. Gamma irradiation to various doses (5-27 MGy) of UDC plates, were followed by thermal treatments of irradiated coupons at 180 and 250 degrees C, in vacuum. The measured changes of nano and micro properties were correlated to glass transition temperatures, as well as the delamination toughness changes, determined earlier on the same material. The established irradiation and annealing effects on nanoindentation properties and Vickers mocrohardness were analyzed as a function of the matrix plasticity change. An attempt was made to assess the contribution of chain scission mechanism and the change in plasticity mechanism on the property changes from irradiation and subsequent thermal treatments. (C) 2011 Elsevier B.V. All rights reserved.
T2  - Journal of Nuclear Materials
T1  - Effects of gamma irradiation and post-irradiation annealing on carbon/epoxy UDC properties deduced by methods of local loading
VL  - 412
IS  - 1
SP  - 190
EP  - 194
DO  - 10.1016/j.jnucmat.2011.01.125
ER  - 

@article{
author = "Sekulić, Danijela R. and Stevanović, M. M.",
year = "2011",
abstract = "Hardness and Youngs modulus of the matrix and fibers in carbon/epoxy gamma irradiated and annealed composites were investigated using nanoindentation technique. The Vickers microhardness of the tested composites after irradiation and annealing was studied, as well. Gamma irradiation to various doses (5-27 MGy) of UDC plates, were followed by thermal treatments of irradiated coupons at 180 and 250 degrees C, in vacuum. The measured changes of nano and micro properties were correlated to glass transition temperatures, as well as the delamination toughness changes, determined earlier on the same material. The established irradiation and annealing effects on nanoindentation properties and Vickers mocrohardness were analyzed as a function of the matrix plasticity change. An attempt was made to assess the contribution of chain scission mechanism and the change in plasticity mechanism on the property changes from irradiation and subsequent thermal treatments. (C) 2011 Elsevier B.V. All rights reserved.",
journal = "Journal of Nuclear Materials",
title = "Effects of gamma irradiation and post-irradiation annealing on carbon/epoxy UDC properties deduced by methods of local loading",
volume = "412",
number = "1",
pages = "190-194",
doi = "10.1016/j.jnucmat.2011.01.125"
}

Sekulić, D. R.,& Stevanović, M. M.. (2011). Effects of gamma irradiation and post-irradiation annealing on carbon/epoxy UDC properties deduced by methods of local loading. in Journal of Nuclear Materials, 412(1), 190-194.
https://doi.org/10.1016/j.jnucmat.2011.01.125

Sekulić DR, Stevanović MM. Effects of gamma irradiation and post-irradiation annealing on carbon/epoxy UDC properties deduced by methods of local loading. in Journal of Nuclear Materials. 2011;412(1):190-194.
doi:10.1016/j.jnucmat.2011.01.125 .

Sekulić, Danijela R., Stevanović, M. M., "Effects of gamma irradiation and post-irradiation annealing on carbon/epoxy UDC properties deduced by methods of local loading" in Journal of Nuclear Materials, 412, no. 1 (2011):190-194,
https://doi.org/10.1016/j.jnucmat.2011.01.125 . .

TY  - JOUR
AU  - Đorđević, Isidor M.
AU  - Sekulić, Danijela R.
AU  - Mitrić, Miodrag
AU  - Stevanović, Momčilo M.
PY  - 2010
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/4024
AB  - Four different PAN-based carbon fibers (high strength, high modulus, and two enhanced strain fibers) were investigated in the standard single filament tensile tests. Nonlinear response was observed in all tested carbon fibers, but the nonlinearity in these fibers was not of the same extent. The tangential fiber modulus values for successive strain intervals (from zero up to failure strain) were fitted by linear as well as the second-order polynomial regression method. The coefficients of linear and square regression as well as the mean square deviation of experimental points from the points on a fitted curve were equal in all tested groups of fibers. The fitted square regression curve has a theoretical foundation, but the empirical expression is obtained by linear regression of modulus-strain data in carbon fibers. However, since the obtained linear relations include the coefficient gamma, which can be a measure of elastic nonlinearity, deduced gamma coefficient values were correlated to the parameters of carbon fiber crystallite structure as well as crystallites orientation.
T2  - Journal of Composite Materials
T1  - Non-Hookean Elastic Behavior and Crystallite Orientation in Carbon Fibers
VL  - 44
IS  - 14
SP  - 1717
EP  - 1727
DO  - 10.1177/0021998309357087
ER  - 

@article{
author = "Đorđević, Isidor M. and Sekulić, Danijela R. and Mitrić, Miodrag and Stevanović, Momčilo M.",
year = "2010",
abstract = "Four different PAN-based carbon fibers (high strength, high modulus, and two enhanced strain fibers) were investigated in the standard single filament tensile tests. Nonlinear response was observed in all tested carbon fibers, but the nonlinearity in these fibers was not of the same extent. The tangential fiber modulus values for successive strain intervals (from zero up to failure strain) were fitted by linear as well as the second-order polynomial regression method. The coefficients of linear and square regression as well as the mean square deviation of experimental points from the points on a fitted curve were equal in all tested groups of fibers. The fitted square regression curve has a theoretical foundation, but the empirical expression is obtained by linear regression of modulus-strain data in carbon fibers. However, since the obtained linear relations include the coefficient gamma, which can be a measure of elastic nonlinearity, deduced gamma coefficient values were correlated to the parameters of carbon fiber crystallite structure as well as crystallites orientation.",
journal = "Journal of Composite Materials",
title = "Non-Hookean Elastic Behavior and Crystallite Orientation in Carbon Fibers",
volume = "44",
number = "14",
pages = "1717-1727",
doi = "10.1177/0021998309357087"
}

Đorđević, I. M., Sekulić, D. R., Mitrić, M.,& Stevanović, M. M.. (2010). Non-Hookean Elastic Behavior and Crystallite Orientation in Carbon Fibers. in Journal of Composite Materials, 44(14), 1717-1727.
https://doi.org/10.1177/0021998309357087

Đorđević IM, Sekulić DR, Mitrić M, Stevanović MM. Non-Hookean Elastic Behavior and Crystallite Orientation in Carbon Fibers. in Journal of Composite Materials. 2010;44(14):1717-1727.
doi:10.1177/0021998309357087 .

Đorđević, Isidor M., Sekulić, Danijela R., Mitrić, Miodrag, Stevanović, Momčilo M., "Non-Hookean Elastic Behavior and Crystallite Orientation in Carbon Fibers" in Journal of Composite Materials, 44, no. 14 (2010):1717-1727,
https://doi.org/10.1177/0021998309357087 . .

TY  - JOUR
AU  - Kaluđerović, Branka V.
AU  - Kljajević, Ljiljana M.
AU  - Sekulić, Danijela R.
AU  - Stašić, Jelena
AU  - Bogdanov, Žarko
PY  - 2009
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/3641
AB  - Carbon hollow fibers were prepared with regenerated cellulose or polysulfone hollow fibers by chemical activation using sodium phosphate dibasic followed by the carbonization process The activation process Increases the adsorption properties of fibers which is more prominent for active carbone fibers obtained from the cellulose precursor Chemical activation with sodium phosphate dibasic produces an active carbon material with both mesopores and micropores.
T2  - Chemical Industry and Chemical Engineering Quarterly / CICEQ
T1  - Adsorption Characteristics of Activated Carbon Hollow Fibers
VL  - 15
IS  - 1
SP  - 29
EP  - 31
DO  - 10.2298/CICEQ0901029K
ER  - 

@article{
author = "Kaluđerović, Branka V. and Kljajević, Ljiljana M. and Sekulić, Danijela R. and Stašić, Jelena and Bogdanov, Žarko",
year = "2009",
abstract = "Carbon hollow fibers were prepared with regenerated cellulose or polysulfone hollow fibers by chemical activation using sodium phosphate dibasic followed by the carbonization process The activation process Increases the adsorption properties of fibers which is more prominent for active carbone fibers obtained from the cellulose precursor Chemical activation with sodium phosphate dibasic produces an active carbon material with both mesopores and micropores.",
journal = "Chemical Industry and Chemical Engineering Quarterly / CICEQ",
title = "Adsorption Characteristics of Activated Carbon Hollow Fibers",
volume = "15",
number = "1",
pages = "29-31",
doi = "10.2298/CICEQ0901029K"
}

Kaluđerović, B. V., Kljajević, L. M., Sekulić, D. R., Stašić, J.,& Bogdanov, Ž.. (2009). Adsorption Characteristics of Activated Carbon Hollow Fibers. in Chemical Industry and Chemical Engineering Quarterly / CICEQ, 15(1), 29-31.
https://doi.org/10.2298/CICEQ0901029K

Kaluđerović BV, Kljajević LM, Sekulić DR, Stašić J, Bogdanov Ž. Adsorption Characteristics of Activated Carbon Hollow Fibers. in Chemical Industry and Chemical Engineering Quarterly / CICEQ. 2009;15(1):29-31.
doi:10.2298/CICEQ0901029K .

Kaluđerović, Branka V., Kljajević, Ljiljana M., Sekulić, Danijela R., Stašić, Jelena, Bogdanov, Žarko, "Adsorption Characteristics of Activated Carbon Hollow Fibers" in Chemical Industry and Chemical Engineering Quarterly / CICEQ, 15, no. 1 (2009):29-31,
https://doi.org/10.2298/CICEQ0901029K . .

TY  - JOUR
AU  - Sekulić, Danijela R.
AU  - Babić, Biljana M.
AU  - Kljajević, Ljiljana M.
AU  - Stašić, Jelena
AU  - Kaluđerović, Branka V.
PY  - 2009
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/3803
AB  - Activated carbon cloth dressing is an appropriate wound healing material due to its biocompatibility and adsorption characteristics. The influence of gamma radiation as a sterilization process on the adsorption and mechanical properties of activated carbon cloth was investigated. The specific surface area, micropore volume, pore size distribution, surface chemistry as well as the breaking load of activated carbon cloth before and after gamma radiation were examined. Characterization by nitrogen adsorption showed that the activated carbon cloth was a microporous material with a high specific surface area and micropores smaller than 1 nm. Gamma radiation decreased the specific surface area and micropore volume but increased the pore width. The sterilization process changed the surface chemistry quantitatively, but not qualitatively. In addition, the breaking load decreased but without any influence considering the further application of this material.
T2  - Journal of the Serbian Chemical Society
T1  - The effect of gamma radiation on the properties of activated carbon cloth
VL  - 74
IS  - 10
SP  - 1125
EP  - 1132
DO  - 10.2298/JSC0910125S
ER  - 

@article{
author = "Sekulić, Danijela R. and Babić, Biljana M. and Kljajević, Ljiljana M. and Stašić, Jelena and Kaluđerović, Branka V.",
year = "2009",
abstract = "Activated carbon cloth dressing is an appropriate wound healing material due to its biocompatibility and adsorption characteristics. The influence of gamma radiation as a sterilization process on the adsorption and mechanical properties of activated carbon cloth was investigated. The specific surface area, micropore volume, pore size distribution, surface chemistry as well as the breaking load of activated carbon cloth before and after gamma radiation were examined. Characterization by nitrogen adsorption showed that the activated carbon cloth was a microporous material with a high specific surface area and micropores smaller than 1 nm. Gamma radiation decreased the specific surface area and micropore volume but increased the pore width. The sterilization process changed the surface chemistry quantitatively, but not qualitatively. In addition, the breaking load decreased but without any influence considering the further application of this material.",
journal = "Journal of the Serbian Chemical Society",
title = "The effect of gamma radiation on the properties of activated carbon cloth",
volume = "74",
number = "10",
pages = "1125-1132",
doi = "10.2298/JSC0910125S"
}

Sekulić, D. R., Babić, B. M., Kljajević, L. M., Stašić, J.,& Kaluđerović, B. V.. (2009). The effect of gamma radiation on the properties of activated carbon cloth. in Journal of the Serbian Chemical Society, 74(10), 1125-1132.
https://doi.org/10.2298/JSC0910125S

Sekulić DR, Babić BM, Kljajević LM, Stašić J, Kaluđerović BV. The effect of gamma radiation on the properties of activated carbon cloth. in Journal of the Serbian Chemical Society. 2009;74(10):1125-1132.
doi:10.2298/JSC0910125S .

Sekulić, Danijela R., Babić, Biljana M., Kljajević, Ljiljana M., Stašić, Jelena, Kaluđerović, Branka V., "The effect of gamma radiation on the properties of activated carbon cloth" in Journal of the Serbian Chemical Society, 74, no. 10 (2009):1125-1132,
https://doi.org/10.2298/JSC0910125S . .

TY  - JOUR
AU  - Sekulić, Danijela R.
AU  - Gordić, Milan V.
AU  - Djordjevic, I. M.
AU  - Petrović, Z. S.
AU  - Stevanović, M. M.
PY  - 2009
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/3596
AB  - Gamma irradiation to various doses (4.8-27.2 MGy) was performed on unidirectional carbon fiber/epoxy resin composite plates. Unidirectional composite coupons irradiated to various doses were annealed at 180 and 250 degrees C, in vacuum. The strain energy release rate G(IC), as a measure of delamination fracture toughness, was determined by Mode I fracture testing on double cantilever beam coupons. The glass transition temperature (T(g)) of the tested coupons matrices was determined in DMA tests. The effects of irradiation and annealing on G(IC) values - the mean values of 10 propagation points (G(IC),(mean)) and that of fracture initiation (G(IC,init)) - were established. These values were analyzed as a function of irradiation dose and annealing temperatures, having in mind glass transition temperature values changes, as well as the possible mechanisms and phenomena of irradiation and annealing. (C) 2008 Elsevier B.V. All rights reserved.
T2  - Journal of Nuclear Materials
T1  - Irradiation and annealing effects on delamination toughness in carbon/epoxy composite
VL  - 383
IS  - 3
SP  - 209
EP  - 214
DO  - 10.1016/j.jnucmat.2008.09.009
ER  - 

@article{
author = "Sekulić, Danijela R. and Gordić, Milan V. and Djordjevic, I. M. and Petrović, Z. S. and Stevanović, M. M.",
year = "2009",
abstract = "Gamma irradiation to various doses (4.8-27.2 MGy) was performed on unidirectional carbon fiber/epoxy resin composite plates. Unidirectional composite coupons irradiated to various doses were annealed at 180 and 250 degrees C, in vacuum. The strain energy release rate G(IC), as a measure of delamination fracture toughness, was determined by Mode I fracture testing on double cantilever beam coupons. The glass transition temperature (T(g)) of the tested coupons matrices was determined in DMA tests. The effects of irradiation and annealing on G(IC) values - the mean values of 10 propagation points (G(IC),(mean)) and that of fracture initiation (G(IC,init)) - were established. These values were analyzed as a function of irradiation dose and annealing temperatures, having in mind glass transition temperature values changes, as well as the possible mechanisms and phenomena of irradiation and annealing. (C) 2008 Elsevier B.V. All rights reserved.",
journal = "Journal of Nuclear Materials",
title = "Irradiation and annealing effects on delamination toughness in carbon/epoxy composite",
volume = "383",
number = "3",
pages = "209-214",
doi = "10.1016/j.jnucmat.2008.09.009"
}

Sekulić, D. R., Gordić, M. V., Djordjevic, I. M., Petrović, Z. S.,& Stevanović, M. M.. (2009). Irradiation and annealing effects on delamination toughness in carbon/epoxy composite. in Journal of Nuclear Materials, 383(3), 209-214.
https://doi.org/10.1016/j.jnucmat.2008.09.009

Sekulić DR, Gordić MV, Djordjevic IM, Petrović ZS, Stevanović MM. Irradiation and annealing effects on delamination toughness in carbon/epoxy composite. in Journal of Nuclear Materials. 2009;383(3):209-214.
doi:10.1016/j.jnucmat.2008.09.009 .

Sekulić, Danijela R., Gordić, Milan V., Djordjevic, I. M., Petrović, Z. S., Stevanović, M. M., "Irradiation and annealing effects on delamination toughness in carbon/epoxy composite" in Journal of Nuclear Materials, 383, no. 3 (2009):209-214,
https://doi.org/10.1016/j.jnucmat.2008.09.009 . .

TY  - JOUR
AU  - Sekulić, Danijela R.
AU  - Božić, Dušan
AU  - Babić, Biljana M.
AU  - Stašić, Jelena
AU  - Stevanović, M.
PY  - 2008
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/3579
AB  - The effects of gamma-irradiation and moisture absorption on the mechanical properties of carbon fibres-epoxy resin composites were studied. The properties dominated by the matrix and fibre-matrix interface (interlaminar and in-plane shear strength) were measured at room temperature using standard tests. These tests were carried out before and after exposures to gamma irradiation and before and after immersion in water at 80 degrees C during 21 days. The dosage of gamma irradiation was up to 11.7 MGy. The micrographs of surfaces fractured in performed tests were observed on a scanning electron microscope. They were analyzed with consulting the stated effects on mechanical properties and the measured values of the glass transition temperature of tested coupons before and after irradiation and immersion in water. The obtained results show that moisture and irradiation, if they act one after the other, have a significant influence on the degradation of matrix-dominated mechanical properties of the tested carbon-epoxy composite.
T2  - Journal of Microscopy, Oxford
T1  - Moisture and gamma-ray irradiation effects on the mechanical properties of carbon fibre-reinforced plastics
VL  - 232
IS  - 3
SP  - 611
EP  - 617
DO  - 10.1111/j.1365-2818.2008.02126.x
ER  - 

@article{
author = "Sekulić, Danijela R. and Božić, Dušan and Babić, Biljana M. and Stašić, Jelena and Stevanović, M.",
year = "2008",
abstract = "The effects of gamma-irradiation and moisture absorption on the mechanical properties of carbon fibres-epoxy resin composites were studied. The properties dominated by the matrix and fibre-matrix interface (interlaminar and in-plane shear strength) were measured at room temperature using standard tests. These tests were carried out before and after exposures to gamma irradiation and before and after immersion in water at 80 degrees C during 21 days. The dosage of gamma irradiation was up to 11.7 MGy. The micrographs of surfaces fractured in performed tests were observed on a scanning electron microscope. They were analyzed with consulting the stated effects on mechanical properties and the measured values of the glass transition temperature of tested coupons before and after irradiation and immersion in water. The obtained results show that moisture and irradiation, if they act one after the other, have a significant influence on the degradation of matrix-dominated mechanical properties of the tested carbon-epoxy composite.",
journal = "Journal of Microscopy, Oxford",
title = "Moisture and gamma-ray irradiation effects on the mechanical properties of carbon fibre-reinforced plastics",
volume = "232",
number = "3",
pages = "611-617",
doi = "10.1111/j.1365-2818.2008.02126.x"
}

Sekulić, D. R., Božić, D., Babić, B. M., Stašić, J.,& Stevanović, M.. (2008). Moisture and gamma-ray irradiation effects on the mechanical properties of carbon fibre-reinforced plastics. in Journal of Microscopy, Oxford, 232(3), 611-617.
https://doi.org/10.1111/j.1365-2818.2008.02126.x

Sekulić DR, Božić D, Babić BM, Stašić J, Stevanović M. Moisture and gamma-ray irradiation effects on the mechanical properties of carbon fibre-reinforced plastics. in Journal of Microscopy, Oxford. 2008;232(3):611-617.
doi:10.1111/j.1365-2818.2008.02126.x .

Sekulić, Danijela R., Božić, Dušan, Babić, Biljana M., Stašić, Jelena, Stevanović, M., "Moisture and gamma-ray irradiation effects on the mechanical properties of carbon fibre-reinforced plastics" in Journal of Microscopy, Oxford, 232, no. 3 (2008):611-617,
https://doi.org/10.1111/j.1365-2818.2008.02126.x . .

TY  - JOUR
AU  - Božić, Dušan
AU  - Sekulić, Danijela R.
AU  - Stašić, Jelena
AU  - Rajković, Višeslava M.
AU  - Jovanović, Milan T.
PY  - 2008
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/3587
AB  - Low cost titanium alloy compacts were produced via the powder metallurgy approach through the hydride-dehydride process and hot consolidation (hot pressing and hot isostatic pressing). The conditions of the reversible hydride-dehydride process were determined by X-ray and scanning electron microscopy characterisation of powders. Powders were consolidated both above and below the beta transformation temperature. The morphology of the microstructure, and the presence of open and closed pores, its well as residual particles of hydrides and oxides have a direct influence on the mechanical properties of compacts (tensile properties and impact toughness).
T2  - International Journal of Materials Research
T1  - The influence of microstructural characteristics and contaminants on the mechanical properties and fracture topography of low cost Ti6Al4V alloy
VL  - 99
IS  - 11
SP  - 1268
EP  - 1274
DO  - 10.3139/146.101762
ER  - 

@article{
author = "Božić, Dušan and Sekulić, Danijela R. and Stašić, Jelena and Rajković, Višeslava M. and Jovanović, Milan T.",
year = "2008",
abstract = "Low cost titanium alloy compacts were produced via the powder metallurgy approach through the hydride-dehydride process and hot consolidation (hot pressing and hot isostatic pressing). The conditions of the reversible hydride-dehydride process were determined by X-ray and scanning electron microscopy characterisation of powders. Powders were consolidated both above and below the beta transformation temperature. The morphology of the microstructure, and the presence of open and closed pores, its well as residual particles of hydrides and oxides have a direct influence on the mechanical properties of compacts (tensile properties and impact toughness).",
journal = "International Journal of Materials Research",
title = "The influence of microstructural characteristics and contaminants on the mechanical properties and fracture topography of low cost Ti6Al4V alloy",
volume = "99",
number = "11",
pages = "1268-1274",
doi = "10.3139/146.101762"
}

Božić, D., Sekulić, D. R., Stašić, J., Rajković, V. M.,& Jovanović, M. T.. (2008). The influence of microstructural characteristics and contaminants on the mechanical properties and fracture topography of low cost Ti6Al4V alloy. in International Journal of Materials Research, 99(11), 1268-1274.
https://doi.org/10.3139/146.101762

Božić D, Sekulić DR, Stašić J, Rajković VM, Jovanović MT. The influence of microstructural characteristics and contaminants on the mechanical properties and fracture topography of low cost Ti6Al4V alloy. in International Journal of Materials Research. 2008;99(11):1268-1274.
doi:10.3139/146.101762 .

Božić, Dušan, Sekulić, Danijela R., Stašić, Jelena, Rajković, Višeslava M., Jovanović, Milan T., "The influence of microstructural characteristics and contaminants on the mechanical properties and fracture topography of low cost Ti6Al4V alloy" in International Journal of Materials Research, 99, no. 11 (2008):1268-1274,
https://doi.org/10.3139/146.101762 . .

TY  - CONF
AU  - Gordić, Milan V.
AU  - Djordjevic, I. M.
AU  - Sekulić, Danijela R.
AU  - Petrovic, Z. S.
AU  - Stevanović, M. M.
PY  - 2007
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/6699
AB  - The paper reports on an experimental study of the Mode I interlaminar fracture of unidirectional carbon fibers/epoxy resin composites. Mode I delamination strain energy release rate G(IC) was determined in double cantilever beam (DCB) test, before and after gamma irradiation at various doses. Glass transition temperature, T-g of epoxy matrix was determined from dynamic mechanical measurements. The delamination surfaces of tested coupons were observed by scanning electron microscopy. The variations in G(IC) values were correlated with irradiation doses, T-g values and the features of delamination microfractographs, as well as with the variation under irradiation of matrix or fibre/matrix dominated mechanical properties.
C3  - Materials Science Forum
T1  - Delamination strain energy release rate in carbon fiber/epoxy resin composites
VL  - 555
SP  - 515
EP  - +
DO  - 10.4028/www.scientific.net/MSF.555.515
ER  - 

@conference{
author = "Gordić, Milan V. and Djordjevic, I. M. and Sekulić, Danijela R. and Petrovic, Z. S. and Stevanović, M. M.",
year = "2007",
abstract = "The paper reports on an experimental study of the Mode I interlaminar fracture of unidirectional carbon fibers/epoxy resin composites. Mode I delamination strain energy release rate G(IC) was determined in double cantilever beam (DCB) test, before and after gamma irradiation at various doses. Glass transition temperature, T-g of epoxy matrix was determined from dynamic mechanical measurements. The delamination surfaces of tested coupons were observed by scanning electron microscopy. The variations in G(IC) values were correlated with irradiation doses, T-g values and the features of delamination microfractographs, as well as with the variation under irradiation of matrix or fibre/matrix dominated mechanical properties.",
journal = "Materials Science Forum",
title = "Delamination strain energy release rate in carbon fiber/epoxy resin composites",
volume = "555",
pages = "515-+",
doi = "10.4028/www.scientific.net/MSF.555.515"
}

Gordić, M. V., Djordjevic, I. M., Sekulić, D. R., Petrovic, Z. S.,& Stevanović, M. M.. (2007). Delamination strain energy release rate in carbon fiber/epoxy resin composites. in Materials Science Forum, 555, 515-+.
https://doi.org/10.4028/www.scientific.net/MSF.555.515

Gordić MV, Djordjevic IM, Sekulić DR, Petrovic ZS, Stevanović MM. Delamination strain energy release rate in carbon fiber/epoxy resin composites. in Materials Science Forum. 2007;555:515-+.
doi:10.4028/www.scientific.net/MSF.555.515 .

Gordić, Milan V., Djordjevic, I. M., Sekulić, Danijela R., Petrovic, Z. S., Stevanović, M. M., "Delamination strain energy release rate in carbon fiber/epoxy resin composites" in Materials Science Forum, 555 (2007):515-+,
https://doi.org/10.4028/www.scientific.net/MSF.555.515 . .

TY  - JOUR
AU  - Djordjevic, Isidor M.
AU  - Sekulić, Danijela R.
AU  - Stevanović, Momčilo M.
PY  - 2007
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/3204
AB  - Five types of polyacrylonitrile, PAN, based carbon fibres, differing in modulus, breaking strain and in crystallite orientation, have been studied. Non-Hookean behaviour was investigated by computing the tangent tensile and compression moduli as a function of strain, from the axial stress-strain response obtained in standard tensile, compression, as well as in modified flexural tests of unidirectional carbon/epoxy composites. The dependences of the tensile modulus on tensile strain of the carbon fibres were extracted from data obtained in single-filament tensile tests. Analytical expresssions for the tensile modulus-tensile strain and compression modulus-compression strain dependences in the performed test were deduced. The structural characterization of the carbon fibres was performed by X-ray diffraction on bundle of parallel fibres. The interlayer spacing d(002) and the apparent lateral dimension of the crystallites L-c were deduced by processing the 002 diffraction profiles. The established modulus-strain dependences were correlated with the fibre characteristics (breaking strain and mean modulus values), as well as with the characteristic of the 002 difraction profile and the d(002) and L-c values.
T2  - Journal of the Serbian Chemical Society
T1  - Non-linear elastic behaviour of carbon fibres of different structural and mechanical characteristic
VL  - 72
IS  - 5
SP  - 513
EP  - 521
DO  - 10.2298/JSC0705513D
ER  - 

@article{
author = "Djordjevic, Isidor M. and Sekulić, Danijela R. and Stevanović, Momčilo M.",
year = "2007",
abstract = "Five types of polyacrylonitrile, PAN, based carbon fibres, differing in modulus, breaking strain and in crystallite orientation, have been studied. Non-Hookean behaviour was investigated by computing the tangent tensile and compression moduli as a function of strain, from the axial stress-strain response obtained in standard tensile, compression, as well as in modified flexural tests of unidirectional carbon/epoxy composites. The dependences of the tensile modulus on tensile strain of the carbon fibres were extracted from data obtained in single-filament tensile tests. Analytical expresssions for the tensile modulus-tensile strain and compression modulus-compression strain dependences in the performed test were deduced. The structural characterization of the carbon fibres was performed by X-ray diffraction on bundle of parallel fibres. The interlayer spacing d(002) and the apparent lateral dimension of the crystallites L-c were deduced by processing the 002 diffraction profiles. The established modulus-strain dependences were correlated with the fibre characteristics (breaking strain and mean modulus values), as well as with the characteristic of the 002 difraction profile and the d(002) and L-c values.",
journal = "Journal of the Serbian Chemical Society",
title = "Non-linear elastic behaviour of carbon fibres of different structural and mechanical characteristic",
volume = "72",
number = "5",
pages = "513-521",
doi = "10.2298/JSC0705513D"
}

Djordjevic, I. M., Sekulić, D. R.,& Stevanović, M. M.. (2007). Non-linear elastic behaviour of carbon fibres of different structural and mechanical characteristic. in Journal of the Serbian Chemical Society, 72(5), 513-521.
https://doi.org/10.2298/JSC0705513D

Djordjevic IM, Sekulić DR, Stevanović MM. Non-linear elastic behaviour of carbon fibres of different structural and mechanical characteristic. in Journal of the Serbian Chemical Society. 2007;72(5):513-521.
doi:10.2298/JSC0705513D .

Djordjevic, Isidor M., Sekulić, Danijela R., Stevanović, Momčilo M., "Non-linear elastic behaviour of carbon fibres of different structural and mechanical characteristic" in Journal of the Serbian Chemical Society, 72, no. 5 (2007):513-521,
https://doi.org/10.2298/JSC0705513D . .

TY  - JOUR
AU  - Sekulić, Danijela R.
AU  - Djordjevic, I. M.
AU  - Gordić, Milan V.
AU  - Burzic, Z. H.
AU  - Stevanović, M. M.
PY  - 2006
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/6618
AB  - Unidirectional and angle-ply carbon/epoxy laminates were gamma irradiated up to doses of 12 and 20 MGy. Composites with two different, low and high temperature epoxy matrices have been submitted to irradiation and subsequent mechanical testing. The radiation effects were studied by measuring in-plane, interalminar shear and transverse tensile strength, as well as interlaminar strain energy release rate of tested composites. The immersion of composite plate in water at 80 degrees C and mechanical measurements at elevated temperatures emphasized irradiation effects on mechanical properties.
T2  - Materials Science Forum
T1  - Gamma radiation effects on mechanical properties of carbon/epoxy composites
VL  - 518
SP  - 549
EP  - 554
DO  - 10.4028/www.scientific.net/MSF.518.549
ER  - 

@article{
author = "Sekulić, Danijela R. and Djordjevic, I. M. and Gordić, Milan V. and Burzic, Z. H. and Stevanović, M. M.",
year = "2006",
abstract = "Unidirectional and angle-ply carbon/epoxy laminates were gamma irradiated up to doses of 12 and 20 MGy. Composites with two different, low and high temperature epoxy matrices have been submitted to irradiation and subsequent mechanical testing. The radiation effects were studied by measuring in-plane, interalminar shear and transverse tensile strength, as well as interlaminar strain energy release rate of tested composites. The immersion of composite plate in water at 80 degrees C and mechanical measurements at elevated temperatures emphasized irradiation effects on mechanical properties.",
journal = "Materials Science Forum",
title = "Gamma radiation effects on mechanical properties of carbon/epoxy composites",
volume = "518",
pages = "549-554",
doi = "10.4028/www.scientific.net/MSF.518.549"
}

Sekulić, D. R., Djordjevic, I. M., Gordić, M. V., Burzic, Z. H.,& Stevanović, M. M.. (2006). Gamma radiation effects on mechanical properties of carbon/epoxy composites. in Materials Science Forum, 518, 549-554.
https://doi.org/10.4028/www.scientific.net/MSF.518.549

Sekulić DR, Djordjevic IM, Gordić MV, Burzic ZH, Stevanović MM. Gamma radiation effects on mechanical properties of carbon/epoxy composites. in Materials Science Forum. 2006;518:549-554.
doi:10.4028/www.scientific.net/MSF.518.549 .

Sekulić, Danijela R., Djordjevic, I. M., Gordić, Milan V., Burzic, Z. H., Stevanović, M. M., "Gamma radiation effects on mechanical properties of carbon/epoxy composites" in Materials Science Forum, 518 (2006):549-554,
https://doi.org/10.4028/www.scientific.net/MSF.518.549 . .