TY  - CONF
AU  - Milošević, Miloš
AU  - Rakin, Marko
AU  - Berto, Filipo
AU  - Međo, Bojan
AU  - Trajković, Isaak
AU  - Bogojević, Nebojša
AU  - Ćirić-Kostić, Snežana
PY  - 2022
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/7274
AB  - Plane-strain fracture toughness is one of the main parameters in linear elastic
fracture mechanics and its purpose is to show the material capability to withstand load while
having a defect. Main validity aspect for such an assessment is to provide a wide enough crack
front to enable plane-strain condition. Nonetheless, in FDM (Fused Deposition Modeling)
polymers, due to structural anisotropy caused by material properties and Additive
Manufacturing (AM) process parameters, more validity aspects must be met. During the planestrain fracture toughness test a crack must follow a straight line from initiation cite up to the
point of structural failure. For such a purpose a DIC (Digital Image Correlation) device can be
used for crack path direction analysis. Plane-strain fracture toughness assessment is conducted
according to the ASTM D5045-14 standard for testing of polymer materials. Tests are
performed on SENB (Single Edge Notched Bend) specimens, made from two similar polymer
materials: quasi-brittle PLA and ductile PLA-X composite. Specimens are manufactured with
four different AM process parameters, i.e., layer height, infill density, printing orientation and
one batch was dried before testing. Testing is conducted using 3-point bending test fixture on
universal testing machine, with DIC dual-camera device placed ahead of the machine in order
to capture full-field deformations of front SENB specimen surface (Fig. 1).
PB  - ESIS Publishing House (ESIS-PH) European Conference on Fracture
C3  - Procedia Structural Integrity
T1  - Additively manufactured tensile ring-shaped specimens for pipeline material fracture examination - influence of geometry
UR  - https://hdl.handle.net/21.15107/rcub_machinery_7274
ER  - 

@conference{
author = "Milošević, Miloš and Rakin, Marko and Berto, Filipo and Međo, Bojan and Trajković, Isaak and Bogojević, Nebojša and Ćirić-Kostić, Snežana",
year = "2022",
abstract = "Plane-strain fracture toughness is one of the main parameters in linear elastic
fracture mechanics and its purpose is to show the material capability to withstand load while
having a defect. Main validity aspect for such an assessment is to provide a wide enough crack
front to enable plane-strain condition. Nonetheless, in FDM (Fused Deposition Modeling)
polymers, due to structural anisotropy caused by material properties and Additive
Manufacturing (AM) process parameters, more validity aspects must be met. During the planestrain fracture toughness test a crack must follow a straight line from initiation cite up to the
point of structural failure. For such a purpose a DIC (Digital Image Correlation) device can be
used for crack path direction analysis. Plane-strain fracture toughness assessment is conducted
according to the ASTM D5045-14 standard for testing of polymer materials. Tests are
performed on SENB (Single Edge Notched Bend) specimens, made from two similar polymer
materials: quasi-brittle PLA and ductile PLA-X composite. Specimens are manufactured with
four different AM process parameters, i.e., layer height, infill density, printing orientation and
one batch was dried before testing. Testing is conducted using 3-point bending test fixture on
universal testing machine, with DIC dual-camera device placed ahead of the machine in order
to capture full-field deformations of front SENB specimen surface (Fig. 1).",
publisher = "ESIS Publishing House (ESIS-PH) European Conference on Fracture",
journal = "Procedia Structural Integrity",
title = "Additively manufactured tensile ring-shaped specimens for pipeline material fracture examination - influence of geometry",
url = "https://hdl.handle.net/21.15107/rcub_machinery_7274"
}

Milošević, M., Rakin, M., Berto, F., Međo, B., Trajković, I., Bogojević, N.,& Ćirić-Kostić, S.. (2022). Additively manufactured tensile ring-shaped specimens for pipeline material fracture examination - influence of geometry. in Procedia Structural Integrity
ESIS Publishing House (ESIS-PH) European Conference on Fracture..
https://hdl.handle.net/21.15107/rcub_machinery_7274

Milošević M, Rakin M, Berto F, Međo B, Trajković I, Bogojević N, Ćirić-Kostić S. Additively manufactured tensile ring-shaped specimens for pipeline material fracture examination - influence of geometry. in Procedia Structural Integrity. 2022;.
https://hdl.handle.net/21.15107/rcub_machinery_7274 .

Milošević, Miloš, Rakin, Marko, Berto, Filipo, Međo, Bojan, Trajković, Isaak, Bogojević, Nebojša, Ćirić-Kostić, Snežana, "Additively manufactured tensile ring-shaped specimens for pipeline material fracture examination - influence of geometry" in Procedia Structural Integrity (2022),
https://hdl.handle.net/21.15107/rcub_machinery_7274 .

TY  - JOUR
AU  - Bogojević, Nebojša
AU  - Lučanin, Vojkan
PY  - 2016
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/2445
AB  - This paper introduces new validation metrics that may be used for the validation of models of railway vehicles. The proposed validation metrics are based on a comparison between the cumulative distribution functions of selected parameters obtained by simulation and measurements. A model of a freight railway vehicle has been developed and the proposed validation metrics were used in model validation. The results of the validation were compared with the results of validation metrics used in the DynoTRAIN' project. It was shown that the proposed metric is more severe than the metrics used in the project; a result of it comparing the complete domains of the cumulative distribution functions and not only the selected characteristic values.
PB  - Sage Publications Ltd, London
T2  - Proceedings of The Institution of Mechanical Engineers Part F-Journal of Rail and Rapid Transit
T1  - The proposal of validation metrics for the assessment of the quality of simulations of the dynamic behaviour of railway vehicles
EP  - 597
IS  - 2
SP  - 585
VL  - 230
DO  - 10.1177/0954409714552700
ER  - 

@article{
author = "Bogojević, Nebojša and Lučanin, Vojkan",
year = "2016",
abstract = "This paper introduces new validation metrics that may be used for the validation of models of railway vehicles. The proposed validation metrics are based on a comparison between the cumulative distribution functions of selected parameters obtained by simulation and measurements. A model of a freight railway vehicle has been developed and the proposed validation metrics were used in model validation. The results of the validation were compared with the results of validation metrics used in the DynoTRAIN' project. It was shown that the proposed metric is more severe than the metrics used in the project; a result of it comparing the complete domains of the cumulative distribution functions and not only the selected characteristic values.",
publisher = "Sage Publications Ltd, London",
journal = "Proceedings of The Institution of Mechanical Engineers Part F-Journal of Rail and Rapid Transit",
title = "The proposal of validation metrics for the assessment of the quality of simulations of the dynamic behaviour of railway vehicles",
pages = "597-585",
number = "2",
volume = "230",
doi = "10.1177/0954409714552700"
}

Bogojević, N.,& Lučanin, V.. (2016). The proposal of validation metrics for the assessment of the quality of simulations of the dynamic behaviour of railway vehicles. in Proceedings of The Institution of Mechanical Engineers Part F-Journal of Rail and Rapid Transit
Sage Publications Ltd, London., 230(2), 585-597.
https://doi.org/10.1177/0954409714552700

Bogojević N, Lučanin V. The proposal of validation metrics for the assessment of the quality of simulations of the dynamic behaviour of railway vehicles. in Proceedings of The Institution of Mechanical Engineers Part F-Journal of Rail and Rapid Transit. 2016;230(2):585-597.
doi:10.1177/0954409714552700 .

Bogojević, Nebojša, Lučanin, Vojkan, "The proposal of validation metrics for the assessment of the quality of simulations of the dynamic behaviour of railway vehicles" in Proceedings of The Institution of Mechanical Engineers Part F-Journal of Rail and Rapid Transit, 230, no. 2 (2016):585-597,
https://doi.org/10.1177/0954409714552700 . .

TY  - JOUR
AU  - Bogojević, Nebojša
AU  - Lučanin, Vojkan
PY  - 2013
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/1624
AB  - Za analizu kvazistatičkog i dinamičkog ponašanja železničkih danas se sve više upotrebljavaju različiti matematički-numerički modeli. Jedno od osnovnih pitanja koje se postavlja prilikom modeliranja mehaničkih sistema je u kojoj meri razvijeni model može tačno opisati realni sistem. U ovom radu je prikazan model železničkog vozila za prevoz rude gvožđa sa povećanom osovinskom nosivošću i izvršena je validacija modela saglasno preporukama UIC-a. Za ocenu saglasnosti modela i realnog sistema poređena su ubrzanja u vertikalnoj i horizontalnoj ravni, vertikalne i bočne sile u kontaktu točak šina, za prazno i natovareno vozilo koje se kreće na pravcu i u krivini. Dobijeni rezultati pokazuju veliku saglasnost rezultata dobijenim eksperimentalnim ispitivanjem i simulacijom dinamičkog kretanja železničkog vozila.
PB  - Institut IMK "14. oktobar", Kruševac
T2  - IMK-14 - Istraživanje i razvoj
T1  - Validacija modela železničkog vozila sa trodelnim obrtnim postoljem
EP  - 74
IS  - 3
SP  - 67
VL  - 19
UR  - https://hdl.handle.net/21.15107/rcub_machinery_1624
ER  - 

@article{
author = "Bogojević, Nebojša and Lučanin, Vojkan",
year = "2013",
abstract = "Za analizu kvazistatičkog i dinamičkog ponašanja železničkih danas se sve više upotrebljavaju različiti matematički-numerički modeli. Jedno od osnovnih pitanja koje se postavlja prilikom modeliranja mehaničkih sistema je u kojoj meri razvijeni model može tačno opisati realni sistem. U ovom radu je prikazan model železničkog vozila za prevoz rude gvožđa sa povećanom osovinskom nosivošću i izvršena je validacija modela saglasno preporukama UIC-a. Za ocenu saglasnosti modela i realnog sistema poređena su ubrzanja u vertikalnoj i horizontalnoj ravni, vertikalne i bočne sile u kontaktu točak šina, za prazno i natovareno vozilo koje se kreće na pravcu i u krivini. Dobijeni rezultati pokazuju veliku saglasnost rezultata dobijenim eksperimentalnim ispitivanjem i simulacijom dinamičkog kretanja železničkog vozila.",
publisher = "Institut IMK "14. oktobar", Kruševac",
journal = "IMK-14 - Istraživanje i razvoj",
title = "Validacija modela železničkog vozila sa trodelnim obrtnim postoljem",
pages = "74-67",
number = "3",
volume = "19",
url = "https://hdl.handle.net/21.15107/rcub_machinery_1624"
}

Bogojević, N.,& Lučanin, V.. (2013). Validacija modela železničkog vozila sa trodelnim obrtnim postoljem. in IMK-14 - Istraživanje i razvoj
Institut IMK "14. oktobar", Kruševac., 19(3), 67-74.
https://hdl.handle.net/21.15107/rcub_machinery_1624

Bogojević N, Lučanin V. Validacija modela železničkog vozila sa trodelnim obrtnim postoljem. in IMK-14 - Istraživanje i razvoj. 2013;19(3):67-74.
https://hdl.handle.net/21.15107/rcub_machinery_1624 .

Bogojević, Nebojša, Lučanin, Vojkan, "Validacija modela železničkog vozila sa trodelnim obrtnim postoljem" in IMK-14 - Istraživanje i razvoj, 19, no. 3 (2013):67-74,
https://hdl.handle.net/21.15107/rcub_machinery_1624 .