TY  - JOUR
AU  - Grbović, Aleksandar
AU  - Kastratović, Gordana
AU  - Bozić, Željko
AU  - Božić, Ivan
AU  - Obradović, Aleksandar
AU  - Sedmak, Aleksandar
AU  - Sedmak, Simon
PY  - 2022
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/3709
AB  - The aircraft industry is a leading industry in terms of the implementation of new materials and technologies. In the development of a light aircraft several different materials were considered for the engine cover design and the final decision was to select a composite material. Part of the research performed on the cover design is presented in this paper. The composite test specimens were produced and mechanical properties were investigated in the tensile and three-point flexural tests according to the required standards. The comparison of experimentally and numerically obtained mechanical properties showed good agreement, which led to the design, verification and manufacturing of the complex-shaped engine cover without costly and demanding tests. It was considered that numerical simulations of the engine cover performance under different loading conditions yielded realistic results, therefore experimental verification was excluded. The flight tests proved the predicted behavior, thus verifying the design methodology presented in this paper.
PB  - Pergamon-Elsevier Science Ltd, Oxford
T2  - Engineering Failure Analysis
T1  - Experimental and numerical evaluation of fracture characteristics of composite material used in the aircraft engine cover manufacturing
VL  - 137
DO  - 10.1016/j.engfailanal.2022.106286
ER  - 

@article{
author = "Grbović, Aleksandar and Kastratović, Gordana and Bozić, Željko and Božić, Ivan and Obradović, Aleksandar and Sedmak, Aleksandar and Sedmak, Simon",
year = "2022",
abstract = "The aircraft industry is a leading industry in terms of the implementation of new materials and technologies. In the development of a light aircraft several different materials were considered for the engine cover design and the final decision was to select a composite material. Part of the research performed on the cover design is presented in this paper. The composite test specimens were produced and mechanical properties were investigated in the tensile and three-point flexural tests according to the required standards. The comparison of experimentally and numerically obtained mechanical properties showed good agreement, which led to the design, verification and manufacturing of the complex-shaped engine cover without costly and demanding tests. It was considered that numerical simulations of the engine cover performance under different loading conditions yielded realistic results, therefore experimental verification was excluded. The flight tests proved the predicted behavior, thus verifying the design methodology presented in this paper.",
publisher = "Pergamon-Elsevier Science Ltd, Oxford",
journal = "Engineering Failure Analysis",
title = "Experimental and numerical evaluation of fracture characteristics of composite material used in the aircraft engine cover manufacturing",
volume = "137",
doi = "10.1016/j.engfailanal.2022.106286"
}

Grbović, A., Kastratović, G., Bozić, Ž., Božić, I., Obradović, A., Sedmak, A.,& Sedmak, S.. (2022). Experimental and numerical evaluation of fracture characteristics of composite material used in the aircraft engine cover manufacturing. in Engineering Failure Analysis
Pergamon-Elsevier Science Ltd, Oxford., 137.
https://doi.org/10.1016/j.engfailanal.2022.106286

Grbović A, Kastratović G, Bozić Ž, Božić I, Obradović A, Sedmak A, Sedmak S. Experimental and numerical evaluation of fracture characteristics of composite material used in the aircraft engine cover manufacturing. in Engineering Failure Analysis. 2022;137.
doi:10.1016/j.engfailanal.2022.106286 .

Grbović, Aleksandar, Kastratović, Gordana, Bozić, Željko, Božić, Ivan, Obradović, Aleksandar, Sedmak, Aleksandar, Sedmak, Simon, "Experimental and numerical evaluation of fracture characteristics of composite material used in the aircraft engine cover manufacturing" in Engineering Failure Analysis, 137 (2022),
https://doi.org/10.1016/j.engfailanal.2022.106286 . .

TY  - JOUR
AU  - Sedmak, Aleksandar
AU  - Vučetić, Filip
AU  - Čolić, Katarina
AU  - Grbović, Aleksandar
AU  - Bozić, Željko
AU  - Sedmak, Simon
AU  - Lozanović Šajić, Jasmina
PY  - 2022
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/3716
AB  - Fatigue crack growth in orthopaedic locking compression plates (LCP), under four-point bending, has been simulated by the extended finite element method (xFEM) to assess LCP optimal geometry in respect to remaining life. Loads corresponded to those occurring in human tibia during gait cycle for different body weights (60, 90 and 120 kg). Experimental investigation consisted of tensile testing and fatigue crack growth rate testing of Ti6Al-4 V alloy, as used for LCP, by standard testing using tensile testing machine and Fractomat, respectively. Results showed that the remaining life of LCPs strongly depend on plate geometry and patient body weight (load).
PB  - Elsevier Sci Ltd, Oxford
T2  - International Journal of Fatigue
T1  - Fatigue crack growth in locking compression plates
VL  - 157
DO  - 10.1016/j.ijfatigue.2022.106727
ER  - 

@article{
author = "Sedmak, Aleksandar and Vučetić, Filip and Čolić, Katarina and Grbović, Aleksandar and Bozić, Željko and Sedmak, Simon and Lozanović Šajić, Jasmina",
year = "2022",
abstract = "Fatigue crack growth in orthopaedic locking compression plates (LCP), under four-point bending, has been simulated by the extended finite element method (xFEM) to assess LCP optimal geometry in respect to remaining life. Loads corresponded to those occurring in human tibia during gait cycle for different body weights (60, 90 and 120 kg). Experimental investigation consisted of tensile testing and fatigue crack growth rate testing of Ti6Al-4 V alloy, as used for LCP, by standard testing using tensile testing machine and Fractomat, respectively. Results showed that the remaining life of LCPs strongly depend on plate geometry and patient body weight (load).",
publisher = "Elsevier Sci Ltd, Oxford",
journal = "International Journal of Fatigue",
title = "Fatigue crack growth in locking compression plates",
volume = "157",
doi = "10.1016/j.ijfatigue.2022.106727"
}

Sedmak, A., Vučetić, F., Čolić, K., Grbović, A., Bozić, Ž., Sedmak, S.,& Lozanović Šajić, J.. (2022). Fatigue crack growth in locking compression plates. in International Journal of Fatigue
Elsevier Sci Ltd, Oxford., 157.
https://doi.org/10.1016/j.ijfatigue.2022.106727

Sedmak A, Vučetić F, Čolić K, Grbović A, Bozić Ž, Sedmak S, Lozanović Šajić J. Fatigue crack growth in locking compression plates. in International Journal of Fatigue. 2022;157.
doi:10.1016/j.ijfatigue.2022.106727 .

Sedmak, Aleksandar, Vučetić, Filip, Čolić, Katarina, Grbović, Aleksandar, Bozić, Željko, Sedmak, Simon, Lozanović Šajić, Jasmina, "Fatigue crack growth in locking compression plates" in International Journal of Fatigue, 157 (2022),
https://doi.org/10.1016/j.ijfatigue.2022.106727 . .

TY  - JOUR
AU  - Monka, Peter
AU  - Monkova, Katarina
AU  - Majstorović, Vidosav D.
AU  - Bozić, Željko
AU  - Andrej, Andrej
PY  - 2021
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/3585
AB  - The article deals with the specification of the most suitable machining parameters for three newly designed end mills in the term of stability of the deep groove machining, at which the depth of cut is minimally twice higher the diameter of the cutter. Online vibration analysis was selected as a tool for goal achievement. The partial objective of the first phase of experimental research was to set the boundary conditions of vibrodiagnostics at the specification of the behaviour of three commercially produced milling cutters when the results were compared with the surface roughness achieved at the machining with individual cutting parameters. Vibrodiagnostic conditions were subsequently applied in the second phase of the experiment to determine the most suitable machining parameters of newly designed milling cutters. The Pinnacle VMC 650 CNC machining centre with Fanuc control system was used to perform the experiments. The material of cutters was S-grade sintered carbide, and all the designed cutters were PVD coated with the same AlTiN (aluminium titanium nitride) coating. The machined material was 16MnCr5 (1.7131) steel. The surface roughness analysis after machining by newly designed cutters pointed out that they are better as for the surface quality in comparison with the commercially produced end mills. Finally, it was possible to state that the four-tooth cutter 01-FVT with helix angles (beta(1) = 39 degrees and beta(2) = 41 degrees) and tooth pitch (tau(1) = 83 degrees and tau(2) = 97 degrees) seems to be the best tool for milling deep-shaped grooves among all the tested milling cutters.
PB  - Springer London Ltd, London
T2  - International Journal of Advanced Manufacturing Technology
T1  - Optimal cutting parameter specification of newly designed milling tools based on the frequency monitoring
EP  - 794
IS  - 3
SP  - 777
VL  - 115
DO  - 10.1007/s00170-020-06169-x
ER  - 

@article{
author = "Monka, Peter and Monkova, Katarina and Majstorović, Vidosav D. and Bozić, Željko and Andrej, Andrej",
year = "2021",
abstract = "The article deals with the specification of the most suitable machining parameters for three newly designed end mills in the term of stability of the deep groove machining, at which the depth of cut is minimally twice higher the diameter of the cutter. Online vibration analysis was selected as a tool for goal achievement. The partial objective of the first phase of experimental research was to set the boundary conditions of vibrodiagnostics at the specification of the behaviour of three commercially produced milling cutters when the results were compared with the surface roughness achieved at the machining with individual cutting parameters. Vibrodiagnostic conditions were subsequently applied in the second phase of the experiment to determine the most suitable machining parameters of newly designed milling cutters. The Pinnacle VMC 650 CNC machining centre with Fanuc control system was used to perform the experiments. The material of cutters was S-grade sintered carbide, and all the designed cutters were PVD coated with the same AlTiN (aluminium titanium nitride) coating. The machined material was 16MnCr5 (1.7131) steel. The surface roughness analysis after machining by newly designed cutters pointed out that they are better as for the surface quality in comparison with the commercially produced end mills. Finally, it was possible to state that the four-tooth cutter 01-FVT with helix angles (beta(1) = 39 degrees and beta(2) = 41 degrees) and tooth pitch (tau(1) = 83 degrees and tau(2) = 97 degrees) seems to be the best tool for milling deep-shaped grooves among all the tested milling cutters.",
publisher = "Springer London Ltd, London",
journal = "International Journal of Advanced Manufacturing Technology",
title = "Optimal cutting parameter specification of newly designed milling tools based on the frequency monitoring",
pages = "794-777",
number = "3",
volume = "115",
doi = "10.1007/s00170-020-06169-x"
}

Monka, P., Monkova, K., Majstorović, V. D., Bozić, Ž.,& Andrej, A.. (2021). Optimal cutting parameter specification of newly designed milling tools based on the frequency monitoring. in International Journal of Advanced Manufacturing Technology
Springer London Ltd, London., 115(3), 777-794.
https://doi.org/10.1007/s00170-020-06169-x

Monka P, Monkova K, Majstorović VD, Bozić Ž, Andrej A. Optimal cutting parameter specification of newly designed milling tools based on the frequency monitoring. in International Journal of Advanced Manufacturing Technology. 2021;115(3):777-794.
doi:10.1007/s00170-020-06169-x .

Monka, Peter, Monkova, Katarina, Majstorović, Vidosav D., Bozić, Željko, Andrej, Andrej, "Optimal cutting parameter specification of newly designed milling tools based on the frequency monitoring" in International Journal of Advanced Manufacturing Technology, 115, no. 3 (2021):777-794,
https://doi.org/10.1007/s00170-020-06169-x . .