TY  - CONF
AU  - Sedak, Miloš
AU  - Dimić, Aleksandar
AU  - Rosić, Božidar
AU  - Ristivojević, Mileta
PY  - 2022
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/5367
AB  - In this paper, we have considered tip interference and radial interference of internal involute spur gears. Equations of tooth profiles are provided and operating constraints for internal gears are defined. The undercutting and interference of the teeth profiles are the main problems for the practical application of internal gears in planetary gear trains, which requires particular attention in the design of planetary gear trains. The problem of avoiding interference of internal involute spur gears is especially challenging. Therefore, it is necessary to create the corresponding geometric models and express the above requirements by the corresponding functional constraints to verify the engagement condition. The developed geometrical model of the tooth surfaces is most helpful in the analysis of meshing interference, contact, and stress analyzing, manufacturing, measuring, and optimizing internal gear sets. The numerical results are tested by computerized simulation of the meshing of internal involute spur gears.
PB  - UNIVERSITY OF BELGRADE Faculty of Mechanical Engineering
C3  - 10th International Scientific Conference - IRMES 2022
T1  - Interference analysis of internal involute spur gear pair
UR  - https://hdl.handle.net/21.15107/rcub_machinery_5367
ER  - 

@conference{
author = "Sedak, Miloš and Dimić, Aleksandar and Rosić, Božidar and Ristivojević, Mileta",
year = "2022",
abstract = "In this paper, we have considered tip interference and radial interference of internal involute spur gears. Equations of tooth profiles are provided and operating constraints for internal gears are defined. The undercutting and interference of the teeth profiles are the main problems for the practical application of internal gears in planetary gear trains, which requires particular attention in the design of planetary gear trains. The problem of avoiding interference of internal involute spur gears is especially challenging. Therefore, it is necessary to create the corresponding geometric models and express the above requirements by the corresponding functional constraints to verify the engagement condition. The developed geometrical model of the tooth surfaces is most helpful in the analysis of meshing interference, contact, and stress analyzing, manufacturing, measuring, and optimizing internal gear sets. The numerical results are tested by computerized simulation of the meshing of internal involute spur gears.",
publisher = "UNIVERSITY OF BELGRADE Faculty of Mechanical Engineering",
journal = "10th International Scientific Conference - IRMES 2022",
title = "Interference analysis of internal involute spur gear pair",
url = "https://hdl.handle.net/21.15107/rcub_machinery_5367"
}

Sedak, M., Dimić, A., Rosić, B.,& Ristivojević, M.. (2022). Interference analysis of internal involute spur gear pair. in 10th International Scientific Conference - IRMES 2022
UNIVERSITY OF BELGRADE Faculty of Mechanical Engineering..
https://hdl.handle.net/21.15107/rcub_machinery_5367

Sedak M, Dimić A, Rosić B, Ristivojević M. Interference analysis of internal involute spur gear pair. in 10th International Scientific Conference - IRMES 2022. 2022;.
https://hdl.handle.net/21.15107/rcub_machinery_5367 .

Sedak, Miloš, Dimić, Aleksandar, Rosić, Božidar, Ristivojević, Mileta, "Interference analysis of internal involute spur gear pair" in 10th International Scientific Conference - IRMES 2022 (2022),
https://hdl.handle.net/21.15107/rcub_machinery_5367 .

TY  - CONF
AU  - Sedak, Miloš
AU  - Rosić, Božidar
AU  - Ristivojević, Mileta
AU  - Mitrović, Radivoje
AU  - Dimić, Aleksandar
AU  - Mišković, Žarko
PY  - 2018
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/5358
AB  - Planetary gears, obtained by the kinematic combinations of toothed pairs with external and internal contacts, are able to provide considerably improved performance compared to the gear pairs with fixed axes, however if not properly designed they can exhibit poor performance regarding gear efficiency. In this regard, and given the fact that majority of research paper concerning this topic emphasize that planetary gears have generally better weight-to-power ratio and improved efficiency compared to the gear pairs with fixed axes, this paper examines the above statements. The main aim is to determine the domain of feasible gear ratios for which the planetary gear sets exhibit better performance, in terms of efficiency and weight-to-power density, than the classical fixed axes gears. In this work, the model of instantaneous gear efficiency is presented and applied to study the efficiency of both standard and high contact ratio involute spur gears. Approximate expressions for the friction power losses and for the efficiency are presented assuming the friction coefficient is changeable along the path of contact.
C3  - International Scientific Conference on Defensive Technologies (OTEH 2018)
T1  - Analysis of the efficiency of the planetary gear sets
UR  - https://hdl.handle.net/21.15107/rcub_machinery_5358
ER  - 

@conference{
author = "Sedak, Miloš and Rosić, Božidar and Ristivojević, Mileta and Mitrović, Radivoje and Dimić, Aleksandar and Mišković, Žarko",
year = "2018",
abstract = "Planetary gears, obtained by the kinematic combinations of toothed pairs with external and internal contacts, are able to provide considerably improved performance compared to the gear pairs with fixed axes, however if not properly designed they can exhibit poor performance regarding gear efficiency. In this regard, and given the fact that majority of research paper concerning this topic emphasize that planetary gears have generally better weight-to-power ratio and improved efficiency compared to the gear pairs with fixed axes, this paper examines the above statements. The main aim is to determine the domain of feasible gear ratios for which the planetary gear sets exhibit better performance, in terms of efficiency and weight-to-power density, than the classical fixed axes gears. In this work, the model of instantaneous gear efficiency is presented and applied to study the efficiency of both standard and high contact ratio involute spur gears. Approximate expressions for the friction power losses and for the efficiency are presented assuming the friction coefficient is changeable along the path of contact.",
journal = "International Scientific Conference on Defensive Technologies (OTEH 2018)",
title = "Analysis of the efficiency of the planetary gear sets",
url = "https://hdl.handle.net/21.15107/rcub_machinery_5358"
}

Sedak, M., Rosić, B., Ristivojević, M., Mitrović, R., Dimić, A.,& Mišković, Ž.. (2018). Analysis of the efficiency of the planetary gear sets. in International Scientific Conference on Defensive Technologies (OTEH 2018).
https://hdl.handle.net/21.15107/rcub_machinery_5358

Sedak M, Rosić B, Ristivojević M, Mitrović R, Dimić A, Mišković Ž. Analysis of the efficiency of the planetary gear sets. in International Scientific Conference on Defensive Technologies (OTEH 2018). 2018;.
https://hdl.handle.net/21.15107/rcub_machinery_5358 .

Sedak, Miloš, Rosić, Božidar, Ristivojević, Mileta, Mitrović, Radivoje, Dimić, Aleksandar, Mišković, Žarko, "Analysis of the efficiency of the planetary gear sets" in International Scientific Conference on Defensive Technologies (OTEH 2018) (2018),
https://hdl.handle.net/21.15107/rcub_machinery_5358 .

TY  - CONF
AU  - Sedak, Miloš
AU  - Lazović, Tatjana
AU  - Rosić, Božidar
PY  - 2016
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/5548
AB  - Planetary gears take a very significant place among the gear transmissions, and they are widely used in military and civil industry applications such as marine vehicles, aircraft engines, helicopters and heavy machinery. Planetary gears are complex mechanisms which can be decomposed into external and internal gears with the corresponding interaction, which requires geometrical conditions in order to perform the mounting and an appropriate meshing of the gears during their work. Planetary gears have a number of advantages as compared to the transmission with fixed shafts such as a compact design, with co-axial shafts, high power density and higher efficiency, which is achieved by reducing gear weight using thin-rimed gears. The purpose of this paper is to present the optimization model for the planetary gears, where the objective function is the weight of gears, and functional constraints imposed upon their respective structural design. Hence, the objective is to minimize rim thickness of the gear in order to achieve high-performance power transmission and minimize weight. This paper presents the results of an investigation with finite element analysis (FEM) into the effects of thin-rimmed gear geometry on the root fillet stress distribution.
PB  - International Scientific Conference on Defensive Technologies (OTEH 2016)
C3  - International Scientific Conference on Defensive Technologies (OTEH 2016)
T1  - Optimization of planetary gears and effects of thin-rimed gear on fillet stress
UR  - https://hdl.handle.net/21.15107/rcub_machinery_5548
ER  - 

@conference{
author = "Sedak, Miloš and Lazović, Tatjana and Rosić, Božidar",
year = "2016",
abstract = "Planetary gears take a very significant place among the gear transmissions, and they are widely used in military and civil industry applications such as marine vehicles, aircraft engines, helicopters and heavy machinery. Planetary gears are complex mechanisms which can be decomposed into external and internal gears with the corresponding interaction, which requires geometrical conditions in order to perform the mounting and an appropriate meshing of the gears during their work. Planetary gears have a number of advantages as compared to the transmission with fixed shafts such as a compact design, with co-axial shafts, high power density and higher efficiency, which is achieved by reducing gear weight using thin-rimed gears. The purpose of this paper is to present the optimization model for the planetary gears, where the objective function is the weight of gears, and functional constraints imposed upon their respective structural design. Hence, the objective is to minimize rim thickness of the gear in order to achieve high-performance power transmission and minimize weight. This paper presents the results of an investigation with finite element analysis (FEM) into the effects of thin-rimmed gear geometry on the root fillet stress distribution.",
publisher = "International Scientific Conference on Defensive Technologies (OTEH 2016)",
journal = "International Scientific Conference on Defensive Technologies (OTEH 2016)",
title = "Optimization of planetary gears and effects of thin-rimed gear on fillet stress",
url = "https://hdl.handle.net/21.15107/rcub_machinery_5548"
}

Sedak, M., Lazović, T.,& Rosić, B.. (2016). Optimization of planetary gears and effects of thin-rimed gear on fillet stress. in International Scientific Conference on Defensive Technologies (OTEH 2016)
International Scientific Conference on Defensive Technologies (OTEH 2016)..
https://hdl.handle.net/21.15107/rcub_machinery_5548

Sedak M, Lazović T, Rosić B. Optimization of planetary gears and effects of thin-rimed gear on fillet stress. in International Scientific Conference on Defensive Technologies (OTEH 2016). 2016;.
https://hdl.handle.net/21.15107/rcub_machinery_5548 .

Sedak, Miloš, Lazović, Tatjana, Rosić, Božidar, "Optimization of planetary gears and effects of thin-rimed gear on fillet stress" in International Scientific Conference on Defensive Technologies (OTEH 2016) (2016),
https://hdl.handle.net/21.15107/rcub_machinery_5548 .

TY  - CONF
AU  - Anđelić, Nina
AU  - Rosić, Božidar
AU  - Milošević-Mitić, Vesna
PY  - 2007
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/5998
AB  - One approach to the optimization of a thin-walled open section beam subjected to 
complex loads is considered. For given loads, material and geometrical characteristics the 
problem is reduced to the determination of minimum mass i.e. minimum cross-sectional area of 
thin-walled beam and minimum of safety factor for the given construction. A method is 
described to solve a nonlinear parameter optimization problem with several objective functions. 
In the present work, multicriteria optimization technique is introduced to extremise 
simultaneously several objective functions. For the defined multicriteria optimization model, a 
computer program based on interactive dialogue was developed. The graphical illustration of the 
above problem is presented in terms of objective functions
C3  - Book of abstracts, Ninth Yugoslav Materials Research Society Conference ‘’YUCOMAT 2007’’, 2007, Herceg Novi, Montenegr
T1  - Mathematical modelling and multicriteria design optimization of a thin-walled beam
SP  - P.S.B.21-116
UR  - https://hdl.handle.net/21.15107/rcub_machinery_5998
ER  - 

@conference{
author = "Anđelić, Nina and Rosić, Božidar and Milošević-Mitić, Vesna",
year = "2007",
abstract = "One approach to the optimization of a thin-walled open section beam subjected to 
complex loads is considered. For given loads, material and geometrical characteristics the 
problem is reduced to the determination of minimum mass i.e. minimum cross-sectional area of 
thin-walled beam and minimum of safety factor for the given construction. A method is 
described to solve a nonlinear parameter optimization problem with several objective functions. 
In the present work, multicriteria optimization technique is introduced to extremise 
simultaneously several objective functions. For the defined multicriteria optimization model, a 
computer program based on interactive dialogue was developed. The graphical illustration of the 
above problem is presented in terms of objective functions",
journal = "Book of abstracts, Ninth Yugoslav Materials Research Society Conference ‘’YUCOMAT 2007’’, 2007, Herceg Novi, Montenegr",
title = "Mathematical modelling and multicriteria design optimization of a thin-walled beam",
pages = "P.S.B.21-116",
url = "https://hdl.handle.net/21.15107/rcub_machinery_5998"
}

Anđelić, N., Rosić, B.,& Milošević-Mitić, V.. (2007). Mathematical modelling and multicriteria design optimization of a thin-walled beam. in Book of abstracts, Ninth Yugoslav Materials Research Society Conference ‘’YUCOMAT 2007’’, 2007, Herceg Novi, Montenegr, P.S.B.21-116.
https://hdl.handle.net/21.15107/rcub_machinery_5998

Anđelić N, Rosić B, Milošević-Mitić V. Mathematical modelling and multicriteria design optimization of a thin-walled beam. in Book of abstracts, Ninth Yugoslav Materials Research Society Conference ‘’YUCOMAT 2007’’, 2007, Herceg Novi, Montenegr. 2007;:P.S.B.21-116.
https://hdl.handle.net/21.15107/rcub_machinery_5998 .

Anđelić, Nina, Rosić, Božidar, Milošević-Mitić, Vesna, "Mathematical modelling and multicriteria design optimization of a thin-walled beam" in Book of abstracts, Ninth Yugoslav Materials Research Society Conference ‘’YUCOMAT 2007’’, 2007, Herceg Novi, Montenegr (2007):P.S.B.21-116,
https://hdl.handle.net/21.15107/rcub_machinery_5998 .