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  - CONF
AU  - Momčilović, Dejan
AU  - Atanasovska, Ivana
AU  - Mitrović, Radivoje
PY  - 2018
UR  - http://rims.institutims.rs/handle/123456789/466
AB  - The consideration of the optimal design of the transition zone of turbine shaft to flange has a high impact within the turbines design. The main principles of biomimetics give a new and prosperous point of view on the machine design, and could recommend a new options in the design solutions for the zones with high stress concentrations. In this paper, a particular turbine shaft with flange is used for research of the possible biomimetics solutions in the zone of the transition radius. The traditional design of this transition zone is compare with the new design option inspired with transition zones in nature. The presented turbine shaft to flange design by biomimetics principles are based on the design of transition zones on trees. The Finite Element Analysis is performed for the traditional designed transition zone, as well as for the transition zone with design based on the biomimetics. The comparative analysis of the obtained results lead to the conclusions about the advantages of the biomimetics approach in this area of machine design.
PB  - University of East Sarajevo, Faculty of Mechanical Engineering East Sarajevo
C3  - Proceedings of the 4rd International Scientific Conference ”Conference on Mechanical Engineering Technologies and Applications” – COMETA2018, East Sarajevo – Jahorina, B&H, RS
T1  - Design of the transition zone of turbine shaft to flange by biomimetics principles
EP  - 463
SP  - 458
UR  - https://hdl.handle.net/21.15107/rcub_rims_466
ER  - 

@conference{
author = "Momčilović, Dejan and Atanasovska, Ivana and Mitrović, Radivoje",
year = "2018",
abstract = "The consideration of the optimal design of the transition zone of turbine shaft to flange has a high impact within the turbines design. The main principles of biomimetics give a new and prosperous point of view on the machine design, and could recommend a new options in the design solutions for the zones with high stress concentrations. In this paper, a particular turbine shaft with flange is used for research of the possible biomimetics solutions in the zone of the transition radius. The traditional design of this transition zone is compare with the new design option inspired with transition zones in nature. The presented turbine shaft to flange design by biomimetics principles are based on the design of transition zones on trees. The Finite Element Analysis is performed for the traditional designed transition zone, as well as for the transition zone with design based on the biomimetics. The comparative analysis of the obtained results lead to the conclusions about the advantages of the biomimetics approach in this area of machine design.",
publisher = "University of East Sarajevo, Faculty of Mechanical Engineering East Sarajevo",
journal = "Proceedings of the 4rd International Scientific Conference ”Conference on Mechanical Engineering Technologies and Applications” – COMETA2018, East Sarajevo – Jahorina, B&H, RS",
title = "Design of the transition zone of turbine shaft to flange by biomimetics principles",
pages = "463-458",
url = "https://hdl.handle.net/21.15107/rcub_rims_466"
}

Momčilović, D., Atanasovska, I.,& Mitrović, R.. (2018). Design of the transition zone of turbine shaft to flange by biomimetics principles. in Proceedings of the 4rd International Scientific Conference ”Conference on Mechanical Engineering Technologies and Applications” – COMETA2018, East Sarajevo – Jahorina, B&H, RS
University of East Sarajevo, Faculty of Mechanical Engineering East Sarajevo., 458-463.
https://hdl.handle.net/21.15107/rcub_rims_466

Momčilović D, Atanasovska I, Mitrović R. Design of the transition zone of turbine shaft to flange by biomimetics principles. in Proceedings of the 4rd International Scientific Conference ”Conference on Mechanical Engineering Technologies and Applications” – COMETA2018, East Sarajevo – Jahorina, B&H, RS. 2018;:458-463.
https://hdl.handle.net/21.15107/rcub_rims_466 .

Momčilović, Dejan, Atanasovska, Ivana, Mitrović, Radivoje, "Design of the transition zone of turbine shaft to flange by biomimetics principles" in Proceedings of the 4rd International Scientific Conference ”Conference on Mechanical Engineering Technologies and Applications” – COMETA2018, East Sarajevo – Jahorina, B&H, RS (2018):458-463,
https://hdl.handle.net/21.15107/rcub_rims_466 .

TY  - JOUR
AU  - Mitrović, Radivoje
AU  - Momčilović, Dejan
AU  - Atanasovska, Ivana
PY  - 2018
UR  - http://rims.institutims.rs/handle/123456789/344
AB  - Researchers in the field of fracture mechanics, predominantly developing appropriate solution algorithms for problems of solid bodies with cracks. Problems in mechanics generally, related with fracture and fatigue for solid bodies with various geometries of sharp notches, are studied to a much lesser extent. This situation can be explained by analytical difficulties arising in solving problems of elasticity theory for bodies with rounded notches. To solve problems of such class, starting from data on stress concentration in the rounded notch tip with a significant radius of curvature, simplified solutions with are therefore of great importance. Recent years, due to constant rise of computing power and development of numerical methods, re-evaluation of stress concentration factors from a viewpoint of theory of elasticity is present. This is mainly as a feedback from industry, which have requirements toward mega and nanostructures. Corrosion represents an important limitation to the safe and reliable use of many alloys in various industries. Pitting corrosion is a form of serious damage on metals surface such as high-strength aluminum alloys and stainless steel, which are susceptible to pitting when exposed to a corrosive attack in aggressive environments. This is particularly valid for dynamic loaded structures. The basic idea behind this paper is finding links between different scientific and engineering disciplines, which will enable useful level of applicability of existing knowledge. The subject of this paper is application of new method of determine length scale parameter for estimating the mechanistic aspect of corrosion pit under uniaxial/multiaxial high-cycle fatigue loading….
PB  - Udruženje intelektualaca za razvoj nauke u Srbiji, Novi Sad
T2  - Applied Engineering Letters
T1  - Determination of critical size of corrosion pit on mechanical elements in hydro power plants
EP  - 5
IS  - 1
SP  - 1
VL  - 3
DO  - 10.18485/aeletters.2018.3.1.1
ER  - 

@article{
author = "Mitrović, Radivoje and Momčilović, Dejan and Atanasovska, Ivana",
year = "2018",
abstract = "Researchers in the field of fracture mechanics, predominantly developing appropriate solution algorithms for problems of solid bodies with cracks. Problems in mechanics generally, related with fracture and fatigue for solid bodies with various geometries of sharp notches, are studied to a much lesser extent. This situation can be explained by analytical difficulties arising in solving problems of elasticity theory for bodies with rounded notches. To solve problems of such class, starting from data on stress concentration in the rounded notch tip with a significant radius of curvature, simplified solutions with are therefore of great importance. Recent years, due to constant rise of computing power and development of numerical methods, re-evaluation of stress concentration factors from a viewpoint of theory of elasticity is present. This is mainly as a feedback from industry, which have requirements toward mega and nanostructures. Corrosion represents an important limitation to the safe and reliable use of many alloys in various industries. Pitting corrosion is a form of serious damage on metals surface such as high-strength aluminum alloys and stainless steel, which are susceptible to pitting when exposed to a corrosive attack in aggressive environments. This is particularly valid for dynamic loaded structures. The basic idea behind this paper is finding links between different scientific and engineering disciplines, which will enable useful level of applicability of existing knowledge. The subject of this paper is application of new method of determine length scale parameter for estimating the mechanistic aspect of corrosion pit under uniaxial/multiaxial high-cycle fatigue loading….",
publisher = "Udruženje intelektualaca za razvoj nauke u Srbiji, Novi Sad",
journal = "Applied Engineering Letters",
title = "Determination of critical size of corrosion pit on mechanical elements in hydro power plants",
pages = "5-1",
number = "1",
volume = "3",
doi = "10.18485/aeletters.2018.3.1.1"
}

Mitrović, R., Momčilović, D.,& Atanasovska, I.. (2018). Determination of critical size of corrosion pit on mechanical elements in hydro power plants. in Applied Engineering Letters
Udruženje intelektualaca za razvoj nauke u Srbiji, Novi Sad., 3(1), 1-5.
https://doi.org/10.18485/aeletters.2018.3.1.1

Mitrović R, Momčilović D, Atanasovska I. Determination of critical size of corrosion pit on mechanical elements in hydro power plants. in Applied Engineering Letters. 2018;3(1):1-5.
doi:10.18485/aeletters.2018.3.1.1 .

Mitrović, Radivoje, Momčilović, Dejan, Atanasovska, Ivana, "Determination of critical size of corrosion pit on mechanical elements in hydro power plants" in Applied Engineering Letters, 3, no. 1 (2018):1-5,
https://doi.org/10.18485/aeletters.2018.3.1.1 . .

TY  - BOOK
AU  - Momčilović, Dejan
AU  - Mitrović, Radivoje
AU  - Atanasovska, Ivana
PY  - 2016
UR  - http://rims.institutims.rs/handle/123456789/456
PB  - Univerzitet u Beogradu – Mašinski fakultet, Srbija
T1  - Koncentracija napona i zamor materijala – savremeni pristup proračunu mašinskih elemenata i konstrukcija
UR  - https://hdl.handle.net/21.15107/rcub_rims_456
ER  - 

@book{
author = "Momčilović, Dejan and Mitrović, Radivoje and Atanasovska, Ivana",
year = "2016",
publisher = "Univerzitet u Beogradu – Mašinski fakultet, Srbija",
title = "Koncentracija napona i zamor materijala – savremeni pristup proračunu mašinskih elemenata i konstrukcija",
url = "https://hdl.handle.net/21.15107/rcub_rims_456"
}

Momčilović, D., Mitrović, R.,& Atanasovska, I.. (2016). Koncentracija napona i zamor materijala – savremeni pristup proračunu mašinskih elemenata i konstrukcija. 
Univerzitet u Beogradu – Mašinski fakultet, Srbija..
https://hdl.handle.net/21.15107/rcub_rims_456

Momčilović D, Mitrović R, Atanasovska I. Koncentracija napona i zamor materijala – savremeni pristup proračunu mašinskih elemenata i konstrukcija. 2016;.
https://hdl.handle.net/21.15107/rcub_rims_456 .

Momčilović, Dejan, Mitrović, Radivoje, Atanasovska, Ivana, "Koncentracija napona i zamor materijala – savremeni pristup proračunu mašinskih elemenata i konstrukcija" (2016),
https://hdl.handle.net/21.15107/rcub_rims_456 .

TY  - CONF
AU  - Momčilović, Dejan
AU  - Atanasovska, Ivana
AU  - Mitrović, Radivoje
AU  - Vukšić-Popović, Marija
PY  - 2015
UR  - http://rims.institutims.rs/handle/123456789/468
AB  - The failures of various parts of mechanical systems in powe industry are the lessons that should be learned thoroughly. Every behaviour of structure close to design encelope must be ecxamined carefully in order to minimize financial losses in future and subsequently increase energy efficiency. Better design procedure or procedures that will gain more accurate results are major request to engineers and researchers last few decades. The verified methods that have proven potentials in application on power industry components coul be used ub assessment and evaluation of critical conditions that could lead to failures. A case study from hydro power plant turbine shaft was chosen as subject for design re-evaluating methodology. The classic analytical calculation of this shaft uses the Peterson's elastic stress concentration factor and calculates stress concentration factors and maximum stresses for different stress components of combined load and then calculate analytical valuesof total stress by hypothesis of maximal normal stress. On the opther hand, presented Finite Element Analysis simulates shaft stress state under real conditions of complex load by simulataneously applying all load components (bending, torsion and tension). Both of calculations are performed for few different radii in shaft-flange sections, as basis for re-evaluation of application of stress concentration factors.
PB  - Serbian Society of Mechanics and Faculty of Technical Sciences Novi Sad
C3  - 5th International Congress of Serbian Society of Mechanics, Aranđelovac, Srbija
T1  - Stress concentration factors in re-evaluation of design solution
UR  - https://hdl.handle.net/21.15107/rcub_rims_468
ER  - 

@conference{
author = "Momčilović, Dejan and Atanasovska, Ivana and Mitrović, Radivoje and Vukšić-Popović, Marija",
year = "2015",
abstract = "The failures of various parts of mechanical systems in powe industry are the lessons that should be learned thoroughly. Every behaviour of structure close to design encelope must be ecxamined carefully in order to minimize financial losses in future and subsequently increase energy efficiency. Better design procedure or procedures that will gain more accurate results are major request to engineers and researchers last few decades. The verified methods that have proven potentials in application on power industry components coul be used ub assessment and evaluation of critical conditions that could lead to failures. A case study from hydro power plant turbine shaft was chosen as subject for design re-evaluating methodology. The classic analytical calculation of this shaft uses the Peterson's elastic stress concentration factor and calculates stress concentration factors and maximum stresses for different stress components of combined load and then calculate analytical valuesof total stress by hypothesis of maximal normal stress. On the opther hand, presented Finite Element Analysis simulates shaft stress state under real conditions of complex load by simulataneously applying all load components (bending, torsion and tension). Both of calculations are performed for few different radii in shaft-flange sections, as basis for re-evaluation of application of stress concentration factors.",
publisher = "Serbian Society of Mechanics and Faculty of Technical Sciences Novi Sad",
journal = "5th International Congress of Serbian Society of Mechanics, Aranđelovac, Srbija",
title = "Stress concentration factors in re-evaluation of design solution",
url = "https://hdl.handle.net/21.15107/rcub_rims_468"
}

Momčilović, D., Atanasovska, I., Mitrović, R.,& Vukšić-Popović, M.. (2015). Stress concentration factors in re-evaluation of design solution. in 5th International Congress of Serbian Society of Mechanics, Aranđelovac, Srbija
Serbian Society of Mechanics and Faculty of Technical Sciences Novi Sad..
https://hdl.handle.net/21.15107/rcub_rims_468

Momčilović D, Atanasovska I, Mitrović R, Vukšić-Popović M. Stress concentration factors in re-evaluation of design solution. in 5th International Congress of Serbian Society of Mechanics, Aranđelovac, Srbija. 2015;.
https://hdl.handle.net/21.15107/rcub_rims_468 .

Momčilović, Dejan, Atanasovska, Ivana, Mitrović, Radivoje, Vukšić-Popović, Marija, "Stress concentration factors in re-evaluation of design solution" in 5th International Congress of Serbian Society of Mechanics, Aranđelovac, Srbija (2015),
https://hdl.handle.net/21.15107/rcub_rims_468 .

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 . .

TY  - JOUR
AU  - Momčilović, Dejan
AU  - Subić, Aleksandar
AU  - Atanasovska, Ivana
AU  - Mitrović, Radivoje
PY  - 2014
UR  - http://rims.institutims.rs/handle/123456789/253
AB  - Na sadašnjem nivou razvoja tehnologije, u stvarnim radnim uslovima, gotovo svi mašinski elementi su opterećeni kombinovanim opterećenjima. Cilj istraživanja prikazanog u ovom radu je ukazivanje na značaj proračuna nosivosti mašinskih elemenata simuliranjem kombinovanog opterećenja. Istraživanje prikazano u radu inspirisano je jednim stvarnim otkazom turbinskog vratila hidroturbine. Vratilo sa prirubnicom i visokim odnosom prečnika vratila i prirubnice bilo je predmet obimnih proračuna u cilju pronalaženja uzroka otkaza. Klasični analitički proračun ovog vratila koristi Peterson-ov faktor koncentracije napona i proračun maksimalnih napona za pojedine naponske komponente kombinovanog opterećenja, a onda analitičku vrednost ukupnog napona proračunava na osnovu hipoteze o maksimalnom normalnom naponu. Sa druge strane, prikazani proračun naponskog stanja vratila metodom konačnih elemenata bazira se na simuliranju realnih radnih opterećenja u uslovima kombinovanog opterećenja istovremenim definisanjem svih komponenti (savijanja, uvijanja i zatezanja). Oba proračuna urađena su za nekoliko različitih radijusa na prelazu vratila ka prirubnici. Dobijeni rezultati prikazani su uporednim dijagramima dobijenih vrednosti ukupnih napona i odgovarajućih faktora koncentracije napona. Analiza ovih dijagrama vodi do zaključka da proračun ukupnog napona u slučaju kombinovanog i složenog opterećenja na bazi Peterson-ovih faktora koncentracije napona i standardnog analitičkog postupka treba da bude zamenjen naprednim tehnikama proračuna koji obezbeđuju tačnija rešenja koja se istovremeno i jednostavnije analiziraju i koriste.
AB  - At a present level of technology, almost all machine parts are subjected to combined loads in real working condition. The aim of research described in this paper is to highlight the importance of combined load simulation for the calculation of machine parts load capacity. This research is inspired by one failure case study of hydro turbine shaft. The shaft with flange and high ratio of shaft/flange diameter is the subject of excessive calculation in order to find the cause of failure. The classic analytical calculation of this shaft uses the Peterson's elastic stress concentration factor and calculates stress concentration factors and maximum stresses for different stress components of combined load and then calculate analytical values of total stress by the hypothesis of maximum normal stress. On the other hand, presented Finite Element Analysis simulates shaft stress state under real conditions of complex load by simultaneously applying all load components (bending, torsion and tension). Both of the calculations are performed for few different radii in shaft-flange sections. The results are presented by comparative diagrams for obtained values of total stresses and stress concentration factors. The analysis of these diagrams leads to conclusion that the use of Peterson's stress concentration factors and standard analytical techniques for total stress calculation has to be replaced with modern calculation techniques that provide a more accurate, easier-to-handle solution.
PB  - Univerzitet u Beogradu - Mašinski fakultet, Beograd
T2  - FME Transactions
T1  - Uporedna analiza proračuna mašinskih elemenata simuliranjem kombinovanog opterećenja i odvojenim simuliranjem komponentnih opterećenja - studija slučaja
T1  - Combined load simulation vs component loads simulation in machine design: A case study
EP  - 55
IS  - 1
SP  - 48
VL  - 42
DO  - 10.5937/fmet1401048M
ER  - 

@article{
author = "Momčilović, Dejan and Subić, Aleksandar and Atanasovska, Ivana and Mitrović, Radivoje",
year = "2014",
abstract = "Na sadašnjem nivou razvoja tehnologije, u stvarnim radnim uslovima, gotovo svi mašinski elementi su opterećeni kombinovanim opterećenjima. Cilj istraživanja prikazanog u ovom radu je ukazivanje na značaj proračuna nosivosti mašinskih elemenata simuliranjem kombinovanog opterećenja. Istraživanje prikazano u radu inspirisano je jednim stvarnim otkazom turbinskog vratila hidroturbine. Vratilo sa prirubnicom i visokim odnosom prečnika vratila i prirubnice bilo je predmet obimnih proračuna u cilju pronalaženja uzroka otkaza. Klasični analitički proračun ovog vratila koristi Peterson-ov faktor koncentracije napona i proračun maksimalnih napona za pojedine naponske komponente kombinovanog opterećenja, a onda analitičku vrednost ukupnog napona proračunava na osnovu hipoteze o maksimalnom normalnom naponu. Sa druge strane, prikazani proračun naponskog stanja vratila metodom konačnih elemenata bazira se na simuliranju realnih radnih opterećenja u uslovima kombinovanog opterećenja istovremenim definisanjem svih komponenti (savijanja, uvijanja i zatezanja). Oba proračuna urađena su za nekoliko različitih radijusa na prelazu vratila ka prirubnici. Dobijeni rezultati prikazani su uporednim dijagramima dobijenih vrednosti ukupnih napona i odgovarajućih faktora koncentracije napona. Analiza ovih dijagrama vodi do zaključka da proračun ukupnog napona u slučaju kombinovanog i složenog opterećenja na bazi Peterson-ovih faktora koncentracije napona i standardnog analitičkog postupka treba da bude zamenjen naprednim tehnikama proračuna koji obezbeđuju tačnija rešenja koja se istovremeno i jednostavnije analiziraju i koriste., At a present level of technology, almost all machine parts are subjected to combined loads in real working condition. The aim of research described in this paper is to highlight the importance of combined load simulation for the calculation of machine parts load capacity. This research is inspired by one failure case study of hydro turbine shaft. The shaft with flange and high ratio of shaft/flange diameter is the subject of excessive calculation in order to find the cause of failure. The classic analytical calculation of this shaft uses the Peterson's elastic stress concentration factor and calculates stress concentration factors and maximum stresses for different stress components of combined load and then calculate analytical values of total stress by the hypothesis of maximum normal stress. On the other hand, presented Finite Element Analysis simulates shaft stress state under real conditions of complex load by simultaneously applying all load components (bending, torsion and tension). Both of the calculations are performed for few different radii in shaft-flange sections. The results are presented by comparative diagrams for obtained values of total stresses and stress concentration factors. The analysis of these diagrams leads to conclusion that the use of Peterson's stress concentration factors and standard analytical techniques for total stress calculation has to be replaced with modern calculation techniques that provide a more accurate, easier-to-handle solution.",
publisher = "Univerzitet u Beogradu - Mašinski fakultet, Beograd",
journal = "FME Transactions",
title = "Uporedna analiza proračuna mašinskih elemenata simuliranjem kombinovanog opterećenja i odvojenim simuliranjem komponentnih opterećenja - studija slučaja, Combined load simulation vs component loads simulation in machine design: A case study",
pages = "55-48",
number = "1",
volume = "42",
doi = "10.5937/fmet1401048M"
}

Momčilović, D., Subić, A., Atanasovska, I.,& Mitrović, R.. (2014). Uporedna analiza proračuna mašinskih elemenata simuliranjem kombinovanog opterećenja i odvojenim simuliranjem komponentnih opterećenja - studija slučaja. in FME Transactions
Univerzitet u Beogradu - Mašinski fakultet, Beograd., 42(1), 48-55.
https://doi.org/10.5937/fmet1401048M

Momčilović D, Subić A, Atanasovska I, Mitrović R. Uporedna analiza proračuna mašinskih elemenata simuliranjem kombinovanog opterećenja i odvojenim simuliranjem komponentnih opterećenja - studija slučaja. in FME Transactions. 2014;42(1):48-55.
doi:10.5937/fmet1401048M .

Momčilović, Dejan, Subić, Aleksandar, Atanasovska, Ivana, Mitrović, Radivoje, "Uporedna analiza proračuna mašinskih elemenata simuliranjem kombinovanog opterećenja i odvojenim simuliranjem komponentnih opterećenja - studija slučaja" in FME Transactions, 42, no. 1 (2014):48-55,
https://doi.org/10.5937/fmet1401048M . .

TY  - JOUR
AU  - Mitrović, Radivoje
AU  - Momčilović, Dejan
AU  - Atanasovska, Ivana
PY  - 2013
UR  - http://rims.institutims.rs/handle/123456789/225
AB  - Energy efficiency is a key issue worldwide, and not confined solely to the realm of engineers. Past failures of mechanical power system components must be examined carefully in order to minimise future occurrences and increase energy efficiencies. Improved design procedures have been highly sought by engineers and researchers over the past few decades. The latest verified method with strong application potential within the power industry is that of the Theory of Critical Distances (TCD). TCD is not one method, but a group of methods that have a common feature; the use of a characteristic material length parameter, the critical distance L, for calculating the influence of notch-like stress raisers under static and fatigue loading. A case study from a hydro power plant turbine shaft was chosen to illustrate the development of this methodology. The paper illustrates the application of TCD to the fatigue life assessment of a turbine shaft with stress concentrations due to pitting corrosion.
PB  - Trans Tech Publications Ltd
T2  - Advanced Materials Research
T1  - Assessment of the effect of pitting corrosion on fatigue crack initiation in hydro turbine shaft
EP  - 196
SP  - 186
VL  - 633
DO  - 10.4028/www.scientific.net/AMR.633.186
ER  - 

@article{
author = "Mitrović, Radivoje and Momčilović, Dejan and Atanasovska, Ivana",
year = "2013",
abstract = "Energy efficiency is a key issue worldwide, and not confined solely to the realm of engineers. Past failures of mechanical power system components must be examined carefully in order to minimise future occurrences and increase energy efficiencies. Improved design procedures have been highly sought by engineers and researchers over the past few decades. The latest verified method with strong application potential within the power industry is that of the Theory of Critical Distances (TCD). TCD is not one method, but a group of methods that have a common feature; the use of a characteristic material length parameter, the critical distance L, for calculating the influence of notch-like stress raisers under static and fatigue loading. A case study from a hydro power plant turbine shaft was chosen to illustrate the development of this methodology. The paper illustrates the application of TCD to the fatigue life assessment of a turbine shaft with stress concentrations due to pitting corrosion.",
publisher = "Trans Tech Publications Ltd",
journal = "Advanced Materials Research",
title = "Assessment of the effect of pitting corrosion on fatigue crack initiation in hydro turbine shaft",
pages = "196-186",
volume = "633",
doi = "10.4028/www.scientific.net/AMR.633.186"
}

Mitrović, R., Momčilović, D.,& Atanasovska, I.. (2013). Assessment of the effect of pitting corrosion on fatigue crack initiation in hydro turbine shaft. in Advanced Materials Research
Trans Tech Publications Ltd., 633, 186-196.
https://doi.org/10.4028/www.scientific.net/AMR.633.186

Mitrović R, Momčilović D, Atanasovska I. Assessment of the effect of pitting corrosion on fatigue crack initiation in hydro turbine shaft. in Advanced Materials Research. 2013;633:186-196.
doi:10.4028/www.scientific.net/AMR.633.186 .

Mitrović, Radivoje, Momčilović, Dejan, Atanasovska, Ivana, "Assessment of the effect of pitting corrosion on fatigue crack initiation in hydro turbine shaft" in Advanced Materials Research, 633 (2013):186-196,
https://doi.org/10.4028/www.scientific.net/AMR.633.186 . .

TY  - CONF
AU  - Atanasovska, Ivana
AU  - Jelić, M.
AU  - Mitrović, Radivoje
AU  - Momčilović, Dejan
PY  - 2013
UR  - http://rims.institutims.rs/handle/123456789/222
AB  - This paper describes the influence of corrosion on stress concentration factor and crack initiation at shaft-flange transition section. The real turbine shaft failure case study is used for research. This case study and numerical calculations show that the seal box solution led to constant leakage of river water in the zone of critical radius and resulted in corrosion fatigue cracks and turbine shaft failure. Thus, the Finite Element Analysis is performed to calculate the stress concentration factor increase as a result of corrosion occurrence. The corrosion at shaft-flange transition section is modelled in the zone with maximum stresses with a corrosion pit dimensioned to comply with real in situ dimension of pits. The presented research points new trends in stress concentration factor calculation. The obtained numerical results for maximum stress and stress concentration factor in critical zone confirmed failure analysis study outcome.
PB  - Springer Netherlands
C3  - Mechanisms and Machine Science
T1  - The influence of corrosion on stress concentration factor at shaft to flange radius
EP  - 666
SP  - 657
VL  - 13
DO  - 10.1007/978-94-007-6558-0_53
ER  - 

@conference{
author = "Atanasovska, Ivana and Jelić, M. and Mitrović, Radivoje and Momčilović, Dejan",
year = "2013",
abstract = "This paper describes the influence of corrosion on stress concentration factor and crack initiation at shaft-flange transition section. The real turbine shaft failure case study is used for research. This case study and numerical calculations show that the seal box solution led to constant leakage of river water in the zone of critical radius and resulted in corrosion fatigue cracks and turbine shaft failure. Thus, the Finite Element Analysis is performed to calculate the stress concentration factor increase as a result of corrosion occurrence. The corrosion at shaft-flange transition section is modelled in the zone with maximum stresses with a corrosion pit dimensioned to comply with real in situ dimension of pits. The presented research points new trends in stress concentration factor calculation. The obtained numerical results for maximum stress and stress concentration factor in critical zone confirmed failure analysis study outcome.",
publisher = "Springer Netherlands",
journal = "Mechanisms and Machine Science",
title = "The influence of corrosion on stress concentration factor at shaft to flange radius",
pages = "666-657",
volume = "13",
doi = "10.1007/978-94-007-6558-0_53"
}

Atanasovska, I., Jelić, M., Mitrović, R.,& Momčilović, D.. (2013). The influence of corrosion on stress concentration factor at shaft to flange radius. in Mechanisms and Machine Science
Springer Netherlands., 13, 657-666.
https://doi.org/10.1007/978-94-007-6558-0_53

Atanasovska I, Jelić M, Mitrović R, Momčilović D. The influence of corrosion on stress concentration factor at shaft to flange radius. in Mechanisms and Machine Science. 2013;13:657-666.
doi:10.1007/978-94-007-6558-0_53 .

Atanasovska, Ivana, Jelić, M., Mitrović, Radivoje, Momčilović, Dejan, "The influence of corrosion on stress concentration factor at shaft to flange radius" in Mechanisms and Machine Science, 13 (2013):657-666,
https://doi.org/10.1007/978-94-007-6558-0_53 . .

TY  - JOUR
AU  - Atanasovska, Ivana
AU  - Mitrović, Radivoje
AU  - Momčilović, Dejan
PY  - 2013
UR  - http://rims.institutims.rs/handle/123456789/219
AB  - The gear tooth profile has an immense effect on the main operating parameters of gear pairs (load capacity, working life, efficiency, vibrations, etc). In current engineering research and practice, there is a strong need to develop methods for tooth profile optimization. In this paper a new method for selecting the optimal tooth profile parameters of spur gears is described. This method has been named the Explicit Parametric Method (EPM). The addendum modification coefficient, radius of root curvature, and pressure angle of the basic rack for cylindrical gears, have been identified as the main tooth profile parameters of spur gears. Therefore, the EPM selects the optimal values for these three tooth profile parameters. Special attention has been paid to develop a method of adjustment for the particular working conditions and explicit optimization requirements. The EPM for optimal tooth profile parameters of gears uses contact nonlinear Finite Element Analysis (FEA) for calculation of deformations and stresses of gear pairs, in addition to explicit comparative diagrams for optimal tooth profile parameter selection.
PB  - Trans Tech Publications Ltd
T2  - Advanced Materials Research
T1  - Explicit parametric method for optimal spur gear tooth profile definition
EP  - 102
SP  - 87
VL  - 633
DO  - 10.4028/www.scientific.net/AMR.633.87
ER  - 

@article{
author = "Atanasovska, Ivana and Mitrović, Radivoje and Momčilović, Dejan",
year = "2013",
abstract = "The gear tooth profile has an immense effect on the main operating parameters of gear pairs (load capacity, working life, efficiency, vibrations, etc). In current engineering research and practice, there is a strong need to develop methods for tooth profile optimization. In this paper a new method for selecting the optimal tooth profile parameters of spur gears is described. This method has been named the Explicit Parametric Method (EPM). The addendum modification coefficient, radius of root curvature, and pressure angle of the basic rack for cylindrical gears, have been identified as the main tooth profile parameters of spur gears. Therefore, the EPM selects the optimal values for these three tooth profile parameters. Special attention has been paid to develop a method of adjustment for the particular working conditions and explicit optimization requirements. The EPM for optimal tooth profile parameters of gears uses contact nonlinear Finite Element Analysis (FEA) for calculation of deformations and stresses of gear pairs, in addition to explicit comparative diagrams for optimal tooth profile parameter selection.",
publisher = "Trans Tech Publications Ltd",
journal = "Advanced Materials Research",
title = "Explicit parametric method for optimal spur gear tooth profile definition",
pages = "102-87",
volume = "633",
doi = "10.4028/www.scientific.net/AMR.633.87"
}

Atanasovska, I., Mitrović, R.,& Momčilović, D.. (2013). Explicit parametric method for optimal spur gear tooth profile definition. in Advanced Materials Research
Trans Tech Publications Ltd., 633, 87-102.
https://doi.org/10.4028/www.scientific.net/AMR.633.87

Atanasovska I, Mitrović R, Momčilović D. Explicit parametric method for optimal spur gear tooth profile definition. in Advanced Materials Research. 2013;633:87-102.
doi:10.4028/www.scientific.net/AMR.633.87 .

Atanasovska, Ivana, Mitrović, Radivoje, Momčilović, Dejan, "Explicit parametric method for optimal spur gear tooth profile definition" in Advanced Materials Research, 633 (2013):87-102,
https://doi.org/10.4028/www.scientific.net/AMR.633.87 . .

TY  - JOUR
AU  - Momčilović, Dejan
AU  - Odanović, Zoran
AU  - Mitrović, Radivoje
AU  - Atanasovska, Ivana
AU  - Vuherer, Tomaž
PY  - 2012
UR  - http://rims.institutims.rs/handle/123456789/195
AB  - This paper describes the analysis of major failure of 28 MW horizontal hydro turbine shaft. The analysis of load carrying capacity of critical radius and fractography analysis are presented. Special emphasize is on metallurgical failure analysis of in-service crack initiation. The analysis of stresses is obtained by the finite element method and the developed model and load conditions are described. Finite element analysis is performed for case of normal service and start-up regime. Based on the failure analysis and numerical calculations, it could be concluded that the seal box design led to constant flow of river water in zone of critical radius which resulted as occurrence of corrosion fatigue cracks and major failure of turbine shaft. Suggestions for problem solution for the turbine shaft are also presented.
PB  - Pergamon-Elsevier Science Ltd, Oxford
T2  - Engineering Failure Analysis
T1  - Failure analysis of hydraulic turbine shaft
EP  - 66
SP  - 54
VL  - 20
DO  - 10.1016/j.engfailanal.2011.10.006
ER  - 

@article{
author = "Momčilović, Dejan and Odanović, Zoran and Mitrović, Radivoje and Atanasovska, Ivana and Vuherer, Tomaž",
year = "2012",
abstract = "This paper describes the analysis of major failure of 28 MW horizontal hydro turbine shaft. The analysis of load carrying capacity of critical radius and fractography analysis are presented. Special emphasize is on metallurgical failure analysis of in-service crack initiation. The analysis of stresses is obtained by the finite element method and the developed model and load conditions are described. Finite element analysis is performed for case of normal service and start-up regime. Based on the failure analysis and numerical calculations, it could be concluded that the seal box design led to constant flow of river water in zone of critical radius which resulted as occurrence of corrosion fatigue cracks and major failure of turbine shaft. Suggestions for problem solution for the turbine shaft are also presented.",
publisher = "Pergamon-Elsevier Science Ltd, Oxford",
journal = "Engineering Failure Analysis",
title = "Failure analysis of hydraulic turbine shaft",
pages = "66-54",
volume = "20",
doi = "10.1016/j.engfailanal.2011.10.006"
}

Momčilović, D., Odanović, Z., Mitrović, R., Atanasovska, I.,& Vuherer, T.. (2012). Failure analysis of hydraulic turbine shaft. in Engineering Failure Analysis
Pergamon-Elsevier Science Ltd, Oxford., 20, 54-66.
https://doi.org/10.1016/j.engfailanal.2011.10.006

Momčilović D, Odanović Z, Mitrović R, Atanasovska I, Vuherer T. Failure analysis of hydraulic turbine shaft. in Engineering Failure Analysis. 2012;20:54-66.
doi:10.1016/j.engfailanal.2011.10.006 .

Momčilović, Dejan, Odanović, Zoran, Mitrović, Radivoje, Atanasovska, Ivana, Vuherer, Tomaž, "Failure analysis of hydraulic turbine shaft" in Engineering Failure Analysis, 20 (2012):54-66,
https://doi.org/10.1016/j.engfailanal.2011.10.006 . .

TY  - CONF
AU  - Mitrović, Radivoje
AU  - Atanasovska, Ivana
AU  - Momčilović, Dejan
PY  - 2012
UR  - http://rims.institutims.rs/handle/123456789/188
AB  - The objective of this paper is to give a new viewpoint in contact fatigue prediction in the case of high-cycle fatigue. The presented research is based on up-to-date methods and multidisciplinary approach, and enables direct calculation of fatigue crack initiation in contact zones. Two methods are built in the new methodology: the Theory of Critical Distances (TCD) and the Finite Element Method (FEM. One particular contact problem contact on spur gear tooth flanks is analyzed for confirmation of the methodology.
PB  - Univ Novi Sad, Fac Tech Sci, Adeko, Novi Sad
C3  - Machine and Industrial Design in Mechanical Engineering, Seventh International Symposium, Kod 2012
T1  - Prediction of crack initiation in spur gear contact zone
EP  - 44
SP  - 37
UR  - https://hdl.handle.net/21.15107/rcub_rims_188
ER  - 

@conference{
author = "Mitrović, Radivoje and Atanasovska, Ivana and Momčilović, Dejan",
year = "2012",
abstract = "The objective of this paper is to give a new viewpoint in contact fatigue prediction in the case of high-cycle fatigue. The presented research is based on up-to-date methods and multidisciplinary approach, and enables direct calculation of fatigue crack initiation in contact zones. Two methods are built in the new methodology: the Theory of Critical Distances (TCD) and the Finite Element Method (FEM. One particular contact problem contact on spur gear tooth flanks is analyzed for confirmation of the methodology.",
publisher = "Univ Novi Sad, Fac Tech Sci, Adeko, Novi Sad",
journal = "Machine and Industrial Design in Mechanical Engineering, Seventh International Symposium, Kod 2012",
title = "Prediction of crack initiation in spur gear contact zone",
pages = "44-37",
url = "https://hdl.handle.net/21.15107/rcub_rims_188"
}

Mitrović, R., Atanasovska, I.,& Momčilović, D.. (2012). Prediction of crack initiation in spur gear contact zone. in Machine and Industrial Design in Mechanical Engineering, Seventh International Symposium, Kod 2012
Univ Novi Sad, Fac Tech Sci, Adeko, Novi Sad., 37-44.
https://hdl.handle.net/21.15107/rcub_rims_188

Mitrović R, Atanasovska I, Momčilović D. Prediction of crack initiation in spur gear contact zone. in Machine and Industrial Design in Mechanical Engineering, Seventh International Symposium, Kod 2012. 2012;:37-44.
https://hdl.handle.net/21.15107/rcub_rims_188 .

Mitrović, Radivoje, Atanasovska, Ivana, Momčilović, Dejan, "Prediction of crack initiation in spur gear contact zone" in Machine and Industrial Design in Mechanical Engineering, Seventh International Symposium, Kod 2012 (2012):37-44,
https://hdl.handle.net/21.15107/rcub_rims_188 .

TY  - JOUR
AU  - Momčilović, Dejan
AU  - Mitrović, Radivoje
AU  - Atanasovska, Ivana
AU  - Vuherer, Tomaž
PY  - 2012
UR  - http://rims.institutims.rs/handle/123456789/186
AB  - This paper describes the influence of corrosion on stress concentration factor and crack initiation at shaft flange transition section. The case study of hydraulic turbine shaft failure is used as the basis for this research. The quantification of the stress concentrators was accomplished by the usage of Theory of critical distances (TCD) in the prediction of high-cycle fatigue behavior in machine parts and systems. The stresses obtained by Finite Element Analysis, was used as an entry values for application of Theory of critical distances. The TCD represents a major extension of linear elastic fracture mechanics, allowing it to be used for short cracks as well as for stress concentrations of arbitrary geometry. Presented methodology is particular valid for machine parts of non-standard dimensions. The significance of results presented in this paper is that TCD and developed methodology can be used in preventing failures in power industry.
PB  - Univerzitet u Novom Sadu - Fakultet tehničkih nauka, Novi Sad
T2  - Machine Design
T1  - Methodology of determination the influence of corrosion pit on decrease of hydro turbine shaft fatigue life
EP  - 236
IS  - 4
SP  - 231
VL  - 4
UR  - https://hdl.handle.net/21.15107/rcub_rims_186
ER  - 

@article{
author = "Momčilović, Dejan and Mitrović, Radivoje and Atanasovska, Ivana and Vuherer, Tomaž",
year = "2012",
abstract = "This paper describes the influence of corrosion on stress concentration factor and crack initiation at shaft flange transition section. The case study of hydraulic turbine shaft failure is used as the basis for this research. The quantification of the stress concentrators was accomplished by the usage of Theory of critical distances (TCD) in the prediction of high-cycle fatigue behavior in machine parts and systems. The stresses obtained by Finite Element Analysis, was used as an entry values for application of Theory of critical distances. The TCD represents a major extension of linear elastic fracture mechanics, allowing it to be used for short cracks as well as for stress concentrations of arbitrary geometry. Presented methodology is particular valid for machine parts of non-standard dimensions. The significance of results presented in this paper is that TCD and developed methodology can be used in preventing failures in power industry.",
publisher = "Univerzitet u Novom Sadu - Fakultet tehničkih nauka, Novi Sad",
journal = "Machine Design",
title = "Methodology of determination the influence of corrosion pit on decrease of hydro turbine shaft fatigue life",
pages = "236-231",
number = "4",
volume = "4",
url = "https://hdl.handle.net/21.15107/rcub_rims_186"
}

Momčilović, D., Mitrović, R., Atanasovska, I.,& Vuherer, T.. (2012). Methodology of determination the influence of corrosion pit on decrease of hydro turbine shaft fatigue life. in Machine Design
Univerzitet u Novom Sadu - Fakultet tehničkih nauka, Novi Sad., 4(4), 231-236.
https://hdl.handle.net/21.15107/rcub_rims_186

Momčilović D, Mitrović R, Atanasovska I, Vuherer T. Methodology of determination the influence of corrosion pit on decrease of hydro turbine shaft fatigue life. in Machine Design. 2012;4(4):231-236.
https://hdl.handle.net/21.15107/rcub_rims_186 .

Momčilović, Dejan, Mitrović, Radivoje, Atanasovska, Ivana, Vuherer, Tomaž, "Methodology of determination the influence of corrosion pit on decrease of hydro turbine shaft fatigue life" in Machine Design, 4, no. 4 (2012):231-236,
https://hdl.handle.net/21.15107/rcub_rims_186 .

TY  - CONF
AU  - Momčilović, Dejan
AU  - Mitrović, Radivoje
AU  - Atanasovska, Ivana
PY  - 2012
UR  - http://rims.institutims.rs/handle/123456789/182
AB  - This paper displays the usage of Theory of Critical Distances (TCD) in the prediction of high-cycle fatigue behaviour in machine parts and systems. It is possible to gain real overview of stresses of machine parts by Finite Element Analysis, and to use them as an entry values for application of Theory of Critical Distances. The TCD represents a major extension of linear elastic fracture mechanics, allowing it to be used for short cracks as well as for stress concentrations of arbitrary geometry. Presented methodology is particular valid for machine parts of non-standard dimensions. A particular turbine shaft from hydro power plant was chosen as subject for developed methodology presentation. This paper illustrates the application of the TCD on decrease of fatigue life of turbine shaft due to shaft-flange radii stress concentration and corrosion pits.
PB  - Univ Novi Sad, Fac Tech Sci, Adeko, Novi Sad
C3  - Machine and Industrial Design in Mechanical Engineering, Seventh International Symposium, Kod 2012
T1  - Quantification of stress raiser influence on decrease of machine parts fatigue life
EP  - 218
SP  - 215
UR  - https://hdl.handle.net/21.15107/rcub_rims_182
ER  - 

@conference{
author = "Momčilović, Dejan and Mitrović, Radivoje and Atanasovska, Ivana",
year = "2012",
abstract = "This paper displays the usage of Theory of Critical Distances (TCD) in the prediction of high-cycle fatigue behaviour in machine parts and systems. It is possible to gain real overview of stresses of machine parts by Finite Element Analysis, and to use them as an entry values for application of Theory of Critical Distances. The TCD represents a major extension of linear elastic fracture mechanics, allowing it to be used for short cracks as well as for stress concentrations of arbitrary geometry. Presented methodology is particular valid for machine parts of non-standard dimensions. A particular turbine shaft from hydro power plant was chosen as subject for developed methodology presentation. This paper illustrates the application of the TCD on decrease of fatigue life of turbine shaft due to shaft-flange radii stress concentration and corrosion pits.",
publisher = "Univ Novi Sad, Fac Tech Sci, Adeko, Novi Sad",
journal = "Machine and Industrial Design in Mechanical Engineering, Seventh International Symposium, Kod 2012",
title = "Quantification of stress raiser influence on decrease of machine parts fatigue life",
pages = "218-215",
url = "https://hdl.handle.net/21.15107/rcub_rims_182"
}

Momčilović, D., Mitrović, R.,& Atanasovska, I.. (2012). Quantification of stress raiser influence on decrease of machine parts fatigue life. in Machine and Industrial Design in Mechanical Engineering, Seventh International Symposium, Kod 2012
Univ Novi Sad, Fac Tech Sci, Adeko, Novi Sad., 215-218.
https://hdl.handle.net/21.15107/rcub_rims_182

Momčilović D, Mitrović R, Atanasovska I. Quantification of stress raiser influence on decrease of machine parts fatigue life. in Machine and Industrial Design in Mechanical Engineering, Seventh International Symposium, Kod 2012. 2012;:215-218.
https://hdl.handle.net/21.15107/rcub_rims_182 .

Momčilović, Dejan, Mitrović, Radivoje, Atanasovska, Ivana, "Quantification of stress raiser influence on decrease of machine parts fatigue life" in Machine and Industrial Design in Mechanical Engineering, Seventh International Symposium, Kod 2012 (2012):215-218,
https://hdl.handle.net/21.15107/rcub_rims_182 .

TY  - JOUR
AU  - Mitrović, Radivoje
AU  - Atanasovska, Ivana
AU  - Momčilović, Dejan
PY  - 2012
UR  - http://rims.institutims.rs/handle/123456789/173
AB  - High-cycle contact fatigue is a localized phenomenon that occurs in highly stressed grains of the material on or under the contact region. The contact zones of tooth flanks for meshed gears are subjected to contact fatigue damages that causes pitting and leads to gears failure. The objective of this paper is to give a new viewpoint in contact fatigue prediction in the case of high-cycle fatigue. The main aim of the presented research is to make the methodology for direct calculation of fatigue crack initiation in contact zones. This methodology is developed for spur gears and used up-to-date methods and multidisciplinary approach. Two methods are built in the new methodology: the Theory of Critical Distances (TCD) and the Finite Element Method (FEM). In this paper the comparative analysis of standard and new methodology for prediction of fatigue crack initiation on tooth flanks is presented. The advantages of methods and procedures used in the new methodology are presented through a case study of particular gear pair. The Finite Element Analysis on 3D gear contact model is used for stress and strain calculation and prediction of the maximum stress location in contact zones along the gear face width. The stress gradient curves from the contact zone are made for a pinion tooth in different cross sections along gear facewidth. The Theory of Critical Distances used these stress gradients and material characteristics for fatigue crack initiation prediction. The benefits of presented methodology are shown by the detail analysis of the obtained results.
PB  - Univerzitet u Novom Sadu - Fakultet tehničkih nauka, Novi Sad
T2  - Machine Design
T1  - A new methodology for prediction of high-cycle contact fatigue for spur gears
EP  - 196
IS  - 4
SP  - 189
VL  - 4
UR  - https://hdl.handle.net/21.15107/rcub_rims_173
ER  - 

@article{
author = "Mitrović, Radivoje and Atanasovska, Ivana and Momčilović, Dejan",
year = "2012",
abstract = "High-cycle contact fatigue is a localized phenomenon that occurs in highly stressed grains of the material on or under the contact region. The contact zones of tooth flanks for meshed gears are subjected to contact fatigue damages that causes pitting and leads to gears failure. The objective of this paper is to give a new viewpoint in contact fatigue prediction in the case of high-cycle fatigue. The main aim of the presented research is to make the methodology for direct calculation of fatigue crack initiation in contact zones. This methodology is developed for spur gears and used up-to-date methods and multidisciplinary approach. Two methods are built in the new methodology: the Theory of Critical Distances (TCD) and the Finite Element Method (FEM). In this paper the comparative analysis of standard and new methodology for prediction of fatigue crack initiation on tooth flanks is presented. The advantages of methods and procedures used in the new methodology are presented through a case study of particular gear pair. The Finite Element Analysis on 3D gear contact model is used for stress and strain calculation and prediction of the maximum stress location in contact zones along the gear face width. The stress gradient curves from the contact zone are made for a pinion tooth in different cross sections along gear facewidth. The Theory of Critical Distances used these stress gradients and material characteristics for fatigue crack initiation prediction. The benefits of presented methodology are shown by the detail analysis of the obtained results.",
publisher = "Univerzitet u Novom Sadu - Fakultet tehničkih nauka, Novi Sad",
journal = "Machine Design",
title = "A new methodology for prediction of high-cycle contact fatigue for spur gears",
pages = "196-189",
number = "4",
volume = "4",
url = "https://hdl.handle.net/21.15107/rcub_rims_173"
}

Mitrović, R., Atanasovska, I.,& Momčilović, D.. (2012). A new methodology for prediction of high-cycle contact fatigue for spur gears. in Machine Design
Univerzitet u Novom Sadu - Fakultet tehničkih nauka, Novi Sad., 4(4), 189-196.
https://hdl.handle.net/21.15107/rcub_rims_173

Mitrović R, Atanasovska I, Momčilović D. A new methodology for prediction of high-cycle contact fatigue for spur gears. in Machine Design. 2012;4(4):189-196.
https://hdl.handle.net/21.15107/rcub_rims_173 .

Mitrović, Radivoje, Atanasovska, Ivana, Momčilović, Dejan, "A new methodology for prediction of high-cycle contact fatigue for spur gears" in Machine Design, 4, no. 4 (2012):189-196,
https://hdl.handle.net/21.15107/rcub_rims_173 .

TY  - JOUR
AU  - Mitrović, Radivoje
AU  - Momčilović, Dejan
AU  - Erić, Olivera A.
AU  - Atanasovska, Ivana
AU  - Hut, Nenad
PY  - 2012
UR  - http://rims.institutims.rs/handle/123456789/171
AB  - The steam pipe line and steam line material, along with its welded joints, subject to damage that accumulates during operation in coal power plants. As a result of thermal fatigue, dilatation of steam pipe line at an operating temperature may lead to cracks initiation at the critical zones within heat affected zone of steam pipe line welded joints. By registration of thermal cycle during welding and subsequent heat affected zone simulation is possible to obtain target microstructure. For the simulation is chosen heat resisting steel, 12H1MF (designation 13CrMo44 according to DIN standard). From the viewpoint of mechanical properties, special attention is on impact toughness mostly because very small number of available references. After simulation of single run and multi run welding test on instrumented Charpy pendulum. Metallographic and fractographic analysis is also performed, on simulated 12H1MF steel from service and new, unused steel. The results and correlation between microstructure and impact toughness is discussed, too.
PB  - Univerzitet u Beogradu - Institut za nuklearne nauke Vinča, Beograd
T2  - Thermal Science
T1  - Study on impact properties of creep-resistant steel thermally simulated heat affected zone
EP  - 525
IS  - 2
SP  - 513
VL  - 16
DO  - 10.2298/TSCI111006142M
ER  - 

@article{
author = "Mitrović, Radivoje and Momčilović, Dejan and Erić, Olivera A. and Atanasovska, Ivana and Hut, Nenad",
year = "2012",
abstract = "The steam pipe line and steam line material, along with its welded joints, subject to damage that accumulates during operation in coal power plants. As a result of thermal fatigue, dilatation of steam pipe line at an operating temperature may lead to cracks initiation at the critical zones within heat affected zone of steam pipe line welded joints. By registration of thermal cycle during welding and subsequent heat affected zone simulation is possible to obtain target microstructure. For the simulation is chosen heat resisting steel, 12H1MF (designation 13CrMo44 according to DIN standard). From the viewpoint of mechanical properties, special attention is on impact toughness mostly because very small number of available references. After simulation of single run and multi run welding test on instrumented Charpy pendulum. Metallographic and fractographic analysis is also performed, on simulated 12H1MF steel from service and new, unused steel. The results and correlation between microstructure and impact toughness is discussed, too.",
publisher = "Univerzitet u Beogradu - Institut za nuklearne nauke Vinča, Beograd",
journal = "Thermal Science",
title = "Study on impact properties of creep-resistant steel thermally simulated heat affected zone",
pages = "525-513",
number = "2",
volume = "16",
doi = "10.2298/TSCI111006142M"
}

Mitrović, R., Momčilović, D., Erić, O. A., Atanasovska, I.,& Hut, N.. (2012). Study on impact properties of creep-resistant steel thermally simulated heat affected zone. in Thermal Science
Univerzitet u Beogradu - Institut za nuklearne nauke Vinča, Beograd., 16(2), 513-525.
https://doi.org/10.2298/TSCI111006142M

Mitrović R, Momčilović D, Erić OA, Atanasovska I, Hut N. Study on impact properties of creep-resistant steel thermally simulated heat affected zone. in Thermal Science. 2012;16(2):513-525.
doi:10.2298/TSCI111006142M .

Mitrović, Radivoje, Momčilović, Dejan, Erić, Olivera A., Atanasovska, Ivana, Hut, Nenad, "Study on impact properties of creep-resistant steel thermally simulated heat affected zone" in Thermal Science, 16, no. 2 (2012):513-525,
https://doi.org/10.2298/TSCI111006142M . .

TY  - JOUR
AU  - Mitrović, Radivoje
AU  - Momčilović, Dejan
AU  - Atanasovska, Ivana
AU  - Hut, Nenad
PY  - 2010
UR  - http://rims.institutims.rs/handle/123456789/127
AB  - Vrlo visoka čvrstoća omogućava žičanom užetu da prenese velike zatezne sile i da se kreće po koturima relativno malog prečnika. Žice od čelika vrlo visoke čvrstoće su postojale više od sto godina pre nego što su patentirane, kada je uveden specijalni postupak zagrevanja i usavršen postupak izvlačenja. Dalja poboljšanja posle toga su uvedena u relativno malim koracima. Žičana užad uvek imaju ograničen radni vek. Zbog toga ona moraju da se podvrgnu inspekciji i ispitaju u pravilnim intervalima da bi se zamenila znatno pre otkaza. Krajnji korisnik mašine sa čeličnim žičanim užetom u svakom slučaju želi da ima grubu ocenu radnog veka užeta već u ranoj fazi razvoja mašine. tako da bude u mogućnosti, ako zatreba, da poboljša sistem mašine. To je jedan od razloga zbog kojih su tokom niza godina izvedena obimna istraživanja kako bi se poboljšali postupci proračuna za predviđanje radnog veka žičanih užadi. Namena ovog rada je da ponudi pregled informacija o postupcima proračuna i da prikaže mogućnosti i ograničenja postupaka prognoziranja za predviđanja radnog veka čeličnih žičanih užadi u eksploataciji.
AB  - Very high strength enables wire ropes to support large tensile forces and to run over sheaves with relative small diameters. Very high strength steel wires had already been in existence for more than a hundred years when patenting, a special heating process was introduced and the drawing process improved. Since then, further improvements have only occurred in relatively small steps. Wire ropes always have a limited service life. Therefore they must be inspected and examined at regular intervals so that they are replaced well before failure. End-users of machinery with steel wire ropes, however, would like to have a rough estimation of the service life of the ropes already in the early stages of conceiving their machines, so that they can, if necessary, improve the revving system. This is one of the reasons why for many years extensive research is carried out in order to improve calculations for predicting the service life of wire ropes. This paper is meant to offer an overview information on the method of calculation and to demonstrate the potential and limitations of the forecasting procedure for service-life prediction of running steel wire ropes.
PB  - Institut za ispitivanje materijala, Beograd
T2  - Integritet i vek konstrukcija
T1  - Predviđanje veka čeličnog žičanog užeta u eksploataciji
T1  - Service life prediction of running steel wire ropes
EP  - 202
IS  - 3
SP  - 199
VL  - 10
UR  - https://hdl.handle.net/21.15107/rcub_rims_127
ER  - 

@article{
author = "Mitrović, Radivoje and Momčilović, Dejan and Atanasovska, Ivana and Hut, Nenad",
year = "2010",
abstract = "Vrlo visoka čvrstoća omogućava žičanom užetu da prenese velike zatezne sile i da se kreće po koturima relativno malog prečnika. Žice od čelika vrlo visoke čvrstoće su postojale više od sto godina pre nego što su patentirane, kada je uveden specijalni postupak zagrevanja i usavršen postupak izvlačenja. Dalja poboljšanja posle toga su uvedena u relativno malim koracima. Žičana užad uvek imaju ograničen radni vek. Zbog toga ona moraju da se podvrgnu inspekciji i ispitaju u pravilnim intervalima da bi se zamenila znatno pre otkaza. Krajnji korisnik mašine sa čeličnim žičanim užetom u svakom slučaju želi da ima grubu ocenu radnog veka užeta već u ranoj fazi razvoja mašine. tako da bude u mogućnosti, ako zatreba, da poboljša sistem mašine. To je jedan od razloga zbog kojih su tokom niza godina izvedena obimna istraživanja kako bi se poboljšali postupci proračuna za predviđanje radnog veka žičanih užadi. Namena ovog rada je da ponudi pregled informacija o postupcima proračuna i da prikaže mogućnosti i ograničenja postupaka prognoziranja za predviđanja radnog veka čeličnih žičanih užadi u eksploataciji., Very high strength enables wire ropes to support large tensile forces and to run over sheaves with relative small diameters. Very high strength steel wires had already been in existence for more than a hundred years when patenting, a special heating process was introduced and the drawing process improved. Since then, further improvements have only occurred in relatively small steps. Wire ropes always have a limited service life. Therefore they must be inspected and examined at regular intervals so that they are replaced well before failure. End-users of machinery with steel wire ropes, however, would like to have a rough estimation of the service life of the ropes already in the early stages of conceiving their machines, so that they can, if necessary, improve the revving system. This is one of the reasons why for many years extensive research is carried out in order to improve calculations for predicting the service life of wire ropes. This paper is meant to offer an overview information on the method of calculation and to demonstrate the potential and limitations of the forecasting procedure for service-life prediction of running steel wire ropes.",
publisher = "Institut za ispitivanje materijala, Beograd",
journal = "Integritet i vek konstrukcija",
title = "Predviđanje veka čeličnog žičanog užeta u eksploataciji, Service life prediction of running steel wire ropes",
pages = "202-199",
number = "3",
volume = "10",
url = "https://hdl.handle.net/21.15107/rcub_rims_127"
}

Mitrović, R., Momčilović, D., Atanasovska, I.,& Hut, N.. (2010). Predviđanje veka čeličnog žičanog užeta u eksploataciji. in Integritet i vek konstrukcija
Institut za ispitivanje materijala, Beograd., 10(3), 199-202.
https://hdl.handle.net/21.15107/rcub_rims_127

Mitrović R, Momčilović D, Atanasovska I, Hut N. Predviđanje veka čeličnog žičanog užeta u eksploataciji. in Integritet i vek konstrukcija. 2010;10(3):199-202.
https://hdl.handle.net/21.15107/rcub_rims_127 .

Mitrović, Radivoje, Momčilović, Dejan, Atanasovska, Ivana, Hut, Nenad, "Predviđanje veka čeličnog žičanog užeta u eksploataciji" in Integritet i vek konstrukcija, 10, no. 3 (2010):199-202,
https://hdl.handle.net/21.15107/rcub_rims_127 .

TY  - JOUR
AU  - Atanasovska, Ivana
AU  - Mitrović, Radivoje
AU  - Momčilović, Dejan
AU  - Subić, Aleksandar
PY  - 2010
UR  - http://rims.institutims.rs/handle/123456789/126
AB  - This research investigates the effects of the nominal load value on load distribution of simultaneously meshing gear teeth pairs, and on the involute gear load capacity. The research results presented in this article confirm that the nominal load value has a significant influence on the gear load capacity calculations. However, this influence is generally neglected in standard gear calculations, which can result in oversized gear dimensions. This can lead to inadequate gear designs in practice due to increased demand for reduced gear size and weight in modern machinery. The article provides a detailed description of the iterative numerical method developed in this research to support the modelling and analysis of load distribution in meshed gears using the finite-element method.
PB  - Sage Publications Ltd, London
T2  - Proceedings of the Institution of Mechanical Engineers Part C-Journal of Mechanical Engineering Scie
T1  - Analysis of the nominal load effects on gear load capacity using the finite-element method
EP  - 2548
IS  - C11
SP  - 2539
VL  - 224
DO  - 10.1243/09544062JMES2508
ER  - 

@article{
author = "Atanasovska, Ivana and Mitrović, Radivoje and Momčilović, Dejan and Subić, Aleksandar",
year = "2010",
abstract = "This research investigates the effects of the nominal load value on load distribution of simultaneously meshing gear teeth pairs, and on the involute gear load capacity. The research results presented in this article confirm that the nominal load value has a significant influence on the gear load capacity calculations. However, this influence is generally neglected in standard gear calculations, which can result in oversized gear dimensions. This can lead to inadequate gear designs in practice due to increased demand for reduced gear size and weight in modern machinery. The article provides a detailed description of the iterative numerical method developed in this research to support the modelling and analysis of load distribution in meshed gears using the finite-element method.",
publisher = "Sage Publications Ltd, London",
journal = "Proceedings of the Institution of Mechanical Engineers Part C-Journal of Mechanical Engineering Scie",
title = "Analysis of the nominal load effects on gear load capacity using the finite-element method",
pages = "2548-2539",
number = "C11",
volume = "224",
doi = "10.1243/09544062JMES2508"
}

Atanasovska, I., Mitrović, R., Momčilović, D.,& Subić, A.. (2010). Analysis of the nominal load effects on gear load capacity using the finite-element method. in Proceedings of the Institution of Mechanical Engineers Part C-Journal of Mechanical Engineering Scie
Sage Publications Ltd, London., 224(C11), 2539-2548.
https://doi.org/10.1243/09544062JMES2508

Atanasovska I, Mitrović R, Momčilović D, Subić A. Analysis of the nominal load effects on gear load capacity using the finite-element method. in Proceedings of the Institution of Mechanical Engineers Part C-Journal of Mechanical Engineering Scie. 2010;224(C11):2539-2548.
doi:10.1243/09544062JMES2508 .

Atanasovska, Ivana, Mitrović, Radivoje, Momčilović, Dejan, Subić, Aleksandar, "Analysis of the nominal load effects on gear load capacity using the finite-element method" in Proceedings of the Institution of Mechanical Engineers Part C-Journal of Mechanical Engineering Scie, 224, no. C11 (2010):2539-2548,
https://doi.org/10.1243/09544062JMES2508 . .