TY  - JOUR
AU  - Atanasovska, Ivana
AU  - Momčilović, Dejan
AU  - Lazović, Tatjana
AU  - Marinković, Aleksandar
AU  - Soldat, Nataša
PY  - 2023
UR  - http://rims.institutims.rs/handle/123456789/538
AB  - During the last few decades, the requirements for modern machine elements in terms of size
reduction, increasing the energy efficiency, and a higher load capacity of standard and non-standard
gears have been very prevalent issues. Within these demands, the main goals are the optimization
of the gears’ tooth profiles, as well as the investigation of new tooth profile designs. The presented
design idea is based on the optimal solutions inspired by nature. Special attention is paid to the new
design of the tooth root zones of spur gears in order to decrease the stress concentration values and
increase the tooth root fatigue resistance. The finite element method is used for stress and strain
state calculations, and the particular gear pair is modeled and optimized for these purposes. For
tooth root strength analysis, the estimations are based on the theory of critical distances and the
stress gradients obtained through finite element analysis. The obtained stress gradients have shown
important improvements in the stress distribution in the transition zone optimized by biomimetics.
An analysis of the material variation influence is also performed. Based on the investigations of a
particular gear pair, a significant stress reduction of about 7% for steel gears and about 10.3% for cast iron gears is obtained for tooth roots optimized by bio-inspired design.
T2  - Biomimetics
T1  - Biomimetics Design of Tooth Root Zone at Cylindrical Gears Profile
IS  - 3
VL  - 8
DO  - 10.3390/biomimetics8030308
ER  - 

@article{
author = "Atanasovska, Ivana and Momčilović, Dejan and Lazović, Tatjana and Marinković, Aleksandar and Soldat, Nataša",
year = "2023",
abstract = "During the last few decades, the requirements for modern machine elements in terms of size
reduction, increasing the energy efficiency, and a higher load capacity of standard and non-standard
gears have been very prevalent issues. Within these demands, the main goals are the optimization
of the gears’ tooth profiles, as well as the investigation of new tooth profile designs. The presented
design idea is based on the optimal solutions inspired by nature. Special attention is paid to the new
design of the tooth root zones of spur gears in order to decrease the stress concentration values and
increase the tooth root fatigue resistance. The finite element method is used for stress and strain
state calculations, and the particular gear pair is modeled and optimized for these purposes. For
tooth root strength analysis, the estimations are based on the theory of critical distances and the
stress gradients obtained through finite element analysis. The obtained stress gradients have shown
important improvements in the stress distribution in the transition zone optimized by biomimetics.
An analysis of the material variation influence is also performed. Based on the investigations of a
particular gear pair, a significant stress reduction of about 7% for steel gears and about 10.3% for cast iron gears is obtained for tooth roots optimized by bio-inspired design.",
journal = "Biomimetics",
title = "Biomimetics Design of Tooth Root Zone at Cylindrical Gears Profile",
number = "3",
volume = "8",
doi = "10.3390/biomimetics8030308"
}

Atanasovska, I., Momčilović, D., Lazović, T., Marinković, A.,& Soldat, N.. (2023). Biomimetics Design of Tooth Root Zone at Cylindrical Gears Profile. in Biomimetics, 8(3).
https://doi.org/10.3390/biomimetics8030308

Atanasovska I, Momčilović D, Lazović T, Marinković A, Soldat N. Biomimetics Design of Tooth Root Zone at Cylindrical Gears Profile. in Biomimetics. 2023;8(3).
doi:10.3390/biomimetics8030308 .

Atanasovska, Ivana, Momčilović, Dejan, Lazović, Tatjana, Marinković, Aleksandar, Soldat, Nataša, "Biomimetics Design of Tooth Root Zone at Cylindrical Gears Profile" in Biomimetics, 8, no. 3 (2023),
https://doi.org/10.3390/biomimetics8030308 . .

TY  - CONF
AU  - Atanasovska, Ivana
AU  - Mitrović, Radivoje
AU  - Soldat, Nataša
AU  - Momčilović, Dejan
PY  - 2020
UR  - http://rims.institutims.rs/handle/123456789/460
AB  - In the framework of Industry 4.0, new specific or improved methods for
monitoring and prediction of operational conditions of machine elements are required.
Ball bearings are among the elements with high impact on safety and reliability of
mechanical systems operation. Hence, the development of accurate methods for their
working conditions monitoring is one of the important tasks within this framework. In
this paper, the development of 3D Finite Element Model for deep groove ball bearings
with defects on ring races is described in detail and its place in the new monitoring
methods is discussed. Special attention is paid to the modeling of contact finite
elements and selection of FEA parameters for fast and secure convergence during
non-linear calculations. The stress analysis of contact zones with defects and influence
of variable defect dimensions are presented, also.
C3  - Proceedings of the 5th International Scientific Conference, ”Conference on Mechanical Engineering Technologies and Applications” COMETa2020, East Sarajevo
T1  - Finite element model for stress state analysis of deep groove ball bearings with defects
EP  - 292
SP  - 285
UR  - https://hdl.handle.net/21.15107/rcub_rims_460
ER  - 

@conference{
author = "Atanasovska, Ivana and Mitrović, Radivoje and Soldat, Nataša and Momčilović, Dejan",
year = "2020",
abstract = "In the framework of Industry 4.0, new specific or improved methods for
monitoring and prediction of operational conditions of machine elements are required.
Ball bearings are among the elements with high impact on safety and reliability of
mechanical systems operation. Hence, the development of accurate methods for their
working conditions monitoring is one of the important tasks within this framework. In
this paper, the development of 3D Finite Element Model for deep groove ball bearings
with defects on ring races is described in detail and its place in the new monitoring
methods is discussed. Special attention is paid to the modeling of contact finite
elements and selection of FEA parameters for fast and secure convergence during
non-linear calculations. The stress analysis of contact zones with defects and influence
of variable defect dimensions are presented, also.",
journal = "Proceedings of the 5th International Scientific Conference, ”Conference on Mechanical Engineering Technologies and Applications” COMETa2020, East Sarajevo",
title = "Finite element model for stress state analysis of deep groove ball bearings with defects",
pages = "292-285",
url = "https://hdl.handle.net/21.15107/rcub_rims_460"
}

Atanasovska, I., Mitrović, R., Soldat, N.,& Momčilović, D.. (2020). Finite element model for stress state analysis of deep groove ball bearings with defects. in Proceedings of the 5th International Scientific Conference, ”Conference on Mechanical Engineering Technologies and Applications” COMETa2020, East Sarajevo, 285-292.
https://hdl.handle.net/21.15107/rcub_rims_460

Atanasovska I, Mitrović R, Soldat N, Momčilović D. Finite element model for stress state analysis of deep groove ball bearings with defects. in Proceedings of the 5th International Scientific Conference, ”Conference on Mechanical Engineering Technologies and Applications” COMETa2020, East Sarajevo. 2020;:285-292.
https://hdl.handle.net/21.15107/rcub_rims_460 .

Atanasovska, Ivana, Mitrović, Radivoje, Soldat, Nataša, Momčilović, Dejan, "Finite element model for stress state analysis of deep groove ball bearings with defects" in Proceedings of the 5th International Scientific Conference, ”Conference on Mechanical Engineering Technologies and Applications” COMETa2020, East Sarajevo (2020):285-292,
https://hdl.handle.net/21.15107/rcub_rims_460 .

TY  - CHAP
AU  - Atanasovska, Ivana
AU  - Momčilović, Dejan
AU  - Mitrović, Radivoje
AU  - Soldat, Nataša D.
AU  - Nešić, N.
PY  - 2020
UR  - http://rims.institutims.rs/handle/123456789/379
AB  - This paper contains elements of a comprehensive research devoted to the dynamic behavior of radial ball bearings in real working conditions. The general motivation for this topic comes from the requirements for high performance operation of bearings within complex mechanical systems, defined in many industrial branches during the last decades. The discussion of the fundamental postulates of the approach used for analyzing the vibration response of rolling ball bearings in order to select the optimal working conditions is given. The certain simplifications and reductions used for analyzing the radial ball bearings are explained. The developed procedure can be used for research of influence of different damages and variable operation conditions on the rolling bearings dynamics. The detail analyses of the dynamic behavior of rolling bearings are performed for particular types of radial ball bearings in two case studies: For the damaged outer raceway surface in accordance with real fatigue damage shapes and dimensions and, for variable working temperature. Obtained results are shown by comparative diagrams of vibration and phase plane portraits. Presented results could be a base for more widely research of nonlinear dynamics of radial ball bearings with different damages and for the application of phase plane analysis in order to choose the optimal operation conditions.
PB  - Springer
T2  - IUTAM Bookseries
T1  - Nonlinear Dynamics as a Tool in Selection of Working Conditions for Radial Ball Bearing
EP  - 58
SP  - 49
VL  - 37
DO  - 10.1007/978-3-030-23692-2_5
ER  - 

@inbook{
author = "Atanasovska, Ivana and Momčilović, Dejan and Mitrović, Radivoje and Soldat, Nataša D. and Nešić, N.",
year = "2020",
abstract = "This paper contains elements of a comprehensive research devoted to the dynamic behavior of radial ball bearings in real working conditions. The general motivation for this topic comes from the requirements for high performance operation of bearings within complex mechanical systems, defined in many industrial branches during the last decades. The discussion of the fundamental postulates of the approach used for analyzing the vibration response of rolling ball bearings in order to select the optimal working conditions is given. The certain simplifications and reductions used for analyzing the radial ball bearings are explained. The developed procedure can be used for research of influence of different damages and variable operation conditions on the rolling bearings dynamics. The detail analyses of the dynamic behavior of rolling bearings are performed for particular types of radial ball bearings in two case studies: For the damaged outer raceway surface in accordance with real fatigue damage shapes and dimensions and, for variable working temperature. Obtained results are shown by comparative diagrams of vibration and phase plane portraits. Presented results could be a base for more widely research of nonlinear dynamics of radial ball bearings with different damages and for the application of phase plane analysis in order to choose the optimal operation conditions.",
publisher = "Springer",
journal = "IUTAM Bookseries",
booktitle = "Nonlinear Dynamics as a Tool in Selection of Working Conditions for Radial Ball Bearing",
pages = "58-49",
volume = "37",
doi = "10.1007/978-3-030-23692-2_5"
}

Atanasovska, I., Momčilović, D., Mitrović, R., Soldat, N. D.,& Nešić, N.. (2020). Nonlinear Dynamics as a Tool in Selection of Working Conditions for Radial Ball Bearing. in IUTAM Bookseries
Springer., 37, 49-58.
https://doi.org/10.1007/978-3-030-23692-2_5

Atanasovska I, Momčilović D, Mitrović R, Soldat ND, Nešić N. Nonlinear Dynamics as a Tool in Selection of Working Conditions for Radial Ball Bearing. in IUTAM Bookseries. 2020;37:49-58.
doi:10.1007/978-3-030-23692-2_5 .

Atanasovska, Ivana, Momčilović, Dejan, Mitrović, Radivoje, Soldat, Nataša D., Nešić, N., "Nonlinear Dynamics as a Tool in Selection of Working Conditions for Radial Ball Bearing" in IUTAM Bookseries, 37 (2020):49-58,
https://doi.org/10.1007/978-3-030-23692-2_5 . .

TY  - JOUR
AU  - Mitrović, Radivoje
AU  - Atanasovska, Ivana
AU  - Soldat, Nataša D.
AU  - Momčilović, Dejan
PY  - 2015
UR  - http://rims.institutims.rs/handle/123456789/279
AB  - The research of influence of operation temperature on the thermal expansion and main parameters of radial ball bearings is presented in this paper. The main bearing parameters are identified in accordance with the increasing requests concerning stability and load capacity. A series of finite element analyses is performed for quasi-static analysis of all identified bearing parameters during contact period in referent temperature. Then, the dependence of bearing material characteristics on the operation temperature is discussed. Few series of finite element analyses are performed for a particular radial ball bearing type, with characteristics in accordance with manufacturer specifications, for several operation temperatures. These two problems analyses include consideration of relation between the initial radial clearance, thermal expansion strains, and contact deformations of the parts of the bearing assembly. The results for radial ball bearing parameters are monitored during a ball contact period for different temperatures and the appropriate discussion and conclusions are given. The conclusions about the contribution of developed procedure in defining the optimum operation temperature range are shown.
PB  - Univerzitet u Beogradu - Institut za nuklearne nauke Vinča, Beograd
T2  - Thermal Science
T1  - Effects of operation temperature on thermal expansion and main parameters of radial ball bearings
EP  - 1844
IS  - 5
SP  - 1835
VL  - 19
DO  - 10.2298/TSCI141223091M
ER  - 

@article{
author = "Mitrović, Radivoje and Atanasovska, Ivana and Soldat, Nataša D. and Momčilović, Dejan",
year = "2015",
abstract = "The research of influence of operation temperature on the thermal expansion and main parameters of radial ball bearings is presented in this paper. The main bearing parameters are identified in accordance with the increasing requests concerning stability and load capacity. A series of finite element analyses is performed for quasi-static analysis of all identified bearing parameters during contact period in referent temperature. Then, the dependence of bearing material characteristics on the operation temperature is discussed. Few series of finite element analyses are performed for a particular radial ball bearing type, with characteristics in accordance with manufacturer specifications, for several operation temperatures. These two problems analyses include consideration of relation between the initial radial clearance, thermal expansion strains, and contact deformations of the parts of the bearing assembly. The results for radial ball bearing parameters are monitored during a ball contact period for different temperatures and the appropriate discussion and conclusions are given. The conclusions about the contribution of developed procedure in defining the optimum operation temperature range are shown.",
publisher = "Univerzitet u Beogradu - Institut za nuklearne nauke Vinča, Beograd",
journal = "Thermal Science",
title = "Effects of operation temperature on thermal expansion and main parameters of radial ball bearings",
pages = "1844-1835",
number = "5",
volume = "19",
doi = "10.2298/TSCI141223091M"
}

Mitrović, R., Atanasovska, I., Soldat, N. D.,& Momčilović, D.. (2015). Effects of operation temperature on thermal expansion and main parameters of radial ball bearings. in Thermal Science
Univerzitet u Beogradu - Institut za nuklearne nauke Vinča, Beograd., 19(5), 1835-1844.
https://doi.org/10.2298/TSCI141223091M

Mitrović R, Atanasovska I, Soldat ND, Momčilović D. Effects of operation temperature on thermal expansion and main parameters of radial ball bearings. in Thermal Science. 2015;19(5):1835-1844.
doi:10.2298/TSCI141223091M .

Mitrović, Radivoje, Atanasovska, Ivana, Soldat, Nataša D., Momčilović, Dejan, "Effects of operation temperature on thermal expansion and main parameters of radial ball bearings" in Thermal Science, 19, no. 5 (2015):1835-1844,
https://doi.org/10.2298/TSCI141223091M . .