TY  - CONF
AU  - Radulović, Radoslav
AU  - Milić, Milica
AU  - Xun, Fei
PY  - 2023
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/7728
AB  - This paper focuses on the conceptual design and structural analysis of winglets attached to the wings of passenger planes, with the aim of improving aircraft performance by reducing fuel consumption and increasing range. Winglets, which are upward and outward extensions of the wings, function by mitigating the drag induced by wingtip vortices. This study underscores the criticality of the winglets' design, as it must strike a balance between structural integrity and lightweight construction. To achieve these objectives, the study proposes the utilization of aluminum and composite materials in a thin-walled construction. Aluminum offers favorable strength-to-weight ratios, rendering it a commonly employed material in aircraft construction. In contrast, composite materials exhibit exceptional strength-to-weight ratios and excellent resistance to corrosion, making them highly suitable for lightweight constructions.
PB  - Serbian Society of Mechanics
C3  - 9th International Congress of Serbian Society of Mechanics, Vrnjačka Banja 5–7.07.2023
T1  - COMPARATIVE STRUCTURAL ANALYSIS OF ALUMINUM AND COMPOSITE WING OF PASSENGER AIRCRAFT
UR  - https://hdl.handle.net/21.15107/rcub_machinery_7728
ER  - 

@conference{
author = "Radulović, Radoslav and Milić, Milica and Xun, Fei",
year = "2023",
abstract = "This paper focuses on the conceptual design and structural analysis of winglets attached to the wings of passenger planes, with the aim of improving aircraft performance by reducing fuel consumption and increasing range. Winglets, which are upward and outward extensions of the wings, function by mitigating the drag induced by wingtip vortices. This study underscores the criticality of the winglets' design, as it must strike a balance between structural integrity and lightweight construction. To achieve these objectives, the study proposes the utilization of aluminum and composite materials in a thin-walled construction. Aluminum offers favorable strength-to-weight ratios, rendering it a commonly employed material in aircraft construction. In contrast, composite materials exhibit exceptional strength-to-weight ratios and excellent resistance to corrosion, making them highly suitable for lightweight constructions.",
publisher = "Serbian Society of Mechanics",
journal = "9th International Congress of Serbian Society of Mechanics, Vrnjačka Banja 5–7.07.2023",
title = "COMPARATIVE STRUCTURAL ANALYSIS OF ALUMINUM AND COMPOSITE WING OF PASSENGER AIRCRAFT",
url = "https://hdl.handle.net/21.15107/rcub_machinery_7728"
}

Radulović, R., Milić, M.,& Xun, F.. (2023). COMPARATIVE STRUCTURAL ANALYSIS OF ALUMINUM AND COMPOSITE WING OF PASSENGER AIRCRAFT. in 9th International Congress of Serbian Society of Mechanics, Vrnjačka Banja 5–7.07.2023
Serbian Society of Mechanics..
https://hdl.handle.net/21.15107/rcub_machinery_7728

Radulović R, Milić M, Xun F. COMPARATIVE STRUCTURAL ANALYSIS OF ALUMINUM AND COMPOSITE WING OF PASSENGER AIRCRAFT. in 9th International Congress of Serbian Society of Mechanics, Vrnjačka Banja 5–7.07.2023. 2023;.
https://hdl.handle.net/21.15107/rcub_machinery_7728 .

Radulović, Radoslav, Milić, Milica, Xun, Fei, "COMPARATIVE STRUCTURAL ANALYSIS OF ALUMINUM AND COMPOSITE WING OF PASSENGER AIRCRAFT" in 9th International Congress of Serbian Society of Mechanics, Vrnjačka Banja 5–7.07.2023 (2023),
https://hdl.handle.net/21.15107/rcub_machinery_7728 .

TY  - CONF
AU  - Radulović, Radoslav
AU  - Milić, Milica
PY  - 2023
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/7727
AB  - As the use of unmanned aerial vehicles (UAV) in the world has expanded, the market needs for the development of multi-role unmanned systems are increasing. These unmanned systems tend to largely find their constant and irreplaceable role in many industries. The development of such systems is a complex process, which, among other things, must include detailed structural, static and dynamic calculations and testing. The UAV presented in this paper is a hybrid powered aircraft with vertical take-off and landing (VTOL) with a composite structure and an innovative hybrid propulsion with a starter-generator system. VTOL gives an advantage in the exploitation of the aircraft itself, because it does not require special ground conditions or space for take-off and landing. The starter and generator system enables a smaller amount of fixed mass, such as batteries, while the structure made of composite materials enables a smaller mass and the desired characteristics of strength, resistance to corrosion and fatigue. This paper present development review process of the latest technology in terms of the concept of system and subsystem operation, as well as financially favorable and high-quality construction.
PB  - Serbian Society of Mechanics
C3  - 9th International Congress of Serbian Society of Mechanics, Vrnjačka Banja 5–7.07.2023
T1  - DEVELOPMENT OF A HYBRID FIXED-WING VTOL UNMANNED AERIAL VEHICLE
UR  - https://hdl.handle.net/21.15107/rcub_machinery_7727
ER  - 

@conference{
author = "Radulović, Radoslav and Milić, Milica",
year = "2023",
abstract = "As the use of unmanned aerial vehicles (UAV) in the world has expanded, the market needs for the development of multi-role unmanned systems are increasing. These unmanned systems tend to largely find their constant and irreplaceable role in many industries. The development of such systems is a complex process, which, among other things, must include detailed structural, static and dynamic calculations and testing. The UAV presented in this paper is a hybrid powered aircraft with vertical take-off and landing (VTOL) with a composite structure and an innovative hybrid propulsion with a starter-generator system. VTOL gives an advantage in the exploitation of the aircraft itself, because it does not require special ground conditions or space for take-off and landing. The starter and generator system enables a smaller amount of fixed mass, such as batteries, while the structure made of composite materials enables a smaller mass and the desired characteristics of strength, resistance to corrosion and fatigue. This paper present development review process of the latest technology in terms of the concept of system and subsystem operation, as well as financially favorable and high-quality construction.",
publisher = "Serbian Society of Mechanics",
journal = "9th International Congress of Serbian Society of Mechanics, Vrnjačka Banja 5–7.07.2023",
title = "DEVELOPMENT OF A HYBRID FIXED-WING VTOL UNMANNED AERIAL VEHICLE",
url = "https://hdl.handle.net/21.15107/rcub_machinery_7727"
}

Radulović, R.,& Milić, M.. (2023). DEVELOPMENT OF A HYBRID FIXED-WING VTOL UNMANNED AERIAL VEHICLE. in 9th International Congress of Serbian Society of Mechanics, Vrnjačka Banja 5–7.07.2023
Serbian Society of Mechanics..
https://hdl.handle.net/21.15107/rcub_machinery_7727

Radulović R, Milić M. DEVELOPMENT OF A HYBRID FIXED-WING VTOL UNMANNED AERIAL VEHICLE. in 9th International Congress of Serbian Society of Mechanics, Vrnjačka Banja 5–7.07.2023. 2023;.
https://hdl.handle.net/21.15107/rcub_machinery_7727 .

Radulović, Radoslav, Milić, Milica, "DEVELOPMENT OF A HYBRID FIXED-WING VTOL UNMANNED AERIAL VEHICLE" in 9th International Congress of Serbian Society of Mechanics, Vrnjačka Banja 5–7.07.2023 (2023),
https://hdl.handle.net/21.15107/rcub_machinery_7727 .

TY  - JOUR
AU  - Vesović, Mitra
AU  - Jovanović, Radiša
AU  - Trišović, Nataša
PY  - 2022
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/3770
AB  - The aim of this study is to investigate nonlinear DC motor behavior and to control velocity as output variable. The linear model is designed, but as it is experimentally verified that it does not describe the system well enough it is replaced by the nonlinear one. System's model has been obtained taking into account Coulomb and viscous friction in the firmly nonlinear environment. In the frame of the paper the dynamical analysis of the nonlinear feedback linearizing control is carried out. Furthermore, a metaheuristic optimization algorithm is set up for finding the coefficient of the proportional-integral feedback linearizing controller. For this purpose Gray wolf optimization technique is used. Moreover, after the introduction of the control law, analysis of the pole placement and stability of the system is establish. Optimized nonlinear control signal has been applied to the real object with simulated white noise and step signal as disturbances. Finally, for several desired output signals, responses with and without disruption are compared to illustrate the approach proposed in the paper. Experimental results obtained on the given system are provided and they verify nonlinear control robustness.
PB  - Sage Publications Ltd, London
T2  - Advances in Mechanical Engineering
T1  - Control of a DC motor using feedback linearization and gray wolf optimization algorithm
IS  - 3
VL  - 14
DO  - 10.1177/16878132221085324
ER  - 

@article{
author = "Vesović, Mitra and Jovanović, Radiša and Trišović, Nataša",
year = "2022",
abstract = "The aim of this study is to investigate nonlinear DC motor behavior and to control velocity as output variable. The linear model is designed, but as it is experimentally verified that it does not describe the system well enough it is replaced by the nonlinear one. System's model has been obtained taking into account Coulomb and viscous friction in the firmly nonlinear environment. In the frame of the paper the dynamical analysis of the nonlinear feedback linearizing control is carried out. Furthermore, a metaheuristic optimization algorithm is set up for finding the coefficient of the proportional-integral feedback linearizing controller. For this purpose Gray wolf optimization technique is used. Moreover, after the introduction of the control law, analysis of the pole placement and stability of the system is establish. Optimized nonlinear control signal has been applied to the real object with simulated white noise and step signal as disturbances. Finally, for several desired output signals, responses with and without disruption are compared to illustrate the approach proposed in the paper. Experimental results obtained on the given system are provided and they verify nonlinear control robustness.",
publisher = "Sage Publications Ltd, London",
journal = "Advances in Mechanical Engineering",
title = "Control of a DC motor using feedback linearization and gray wolf optimization algorithm",
number = "3",
volume = "14",
doi = "10.1177/16878132221085324"
}

Vesović, M., Jovanović, R.,& Trišović, N.. (2022). Control of a DC motor using feedback linearization and gray wolf optimization algorithm. in Advances in Mechanical Engineering
Sage Publications Ltd, London., 14(3).
https://doi.org/10.1177/16878132221085324

Vesović M, Jovanović R, Trišović N. Control of a DC motor using feedback linearization and gray wolf optimization algorithm. in Advances in Mechanical Engineering. 2022;14(3).
doi:10.1177/16878132221085324 .

Vesović, Mitra, Jovanović, Radiša, Trišović, Nataša, "Control of a DC motor using feedback linearization and gray wolf optimization algorithm" in Advances in Mechanical Engineering, 14, no. 3 (2022),
https://doi.org/10.1177/16878132221085324 . .

TY  - CONF
AU  - Rosić, Nevena
PY  - 2021
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/4641
AB  - The human musculoskeletal system is comprised of various joints which are characterized by
their unique morphology and kinematics. The joint coordinate system is tailored to comply with
the observed mechanical properties of joints, making their research more intuitive and in
accordance with standard clinical terminology. This coordinate system allows for spatial orientation to be described by three sequence independent Euler angles (the so-called “jaw-pitch-roll” angles), which mirrors the sequence independency of the final position of human limbs. The knee joint is the most complex, both anatomically and mechanically. It can be modeled as a four link open kinematic chain to which the joint coordinate system is applied. This coordinate system is usually described in Denavit-Hartenberg parameters, and the rotation transformation matrix is obtained using standard methods of vector algebra. In this paper another approach is used to derive the rotation transformation matrix, namely, the Rodrigues’ rotation formula. The utility of this algorithm is evident: the Rodrigues’ method provides an elegant solution which is obtained in a concise and efficient manner.
PB  - Beograd: Srpsko društvo za mehaniku
C3  - Proceedings of the 8th International Congress of Serbian Society of Mechanics, Kragujevac, Serbia, June 28-30, 2021.
T1  - Rotation Transformation Matrix of the Joint Coordinate System with the Application to the Knee Joint
UR  - https://hdl.handle.net/21.15107/rcub_machinery_4641
ER  - 

@conference{
author = "Rosić, Nevena",
year = "2021",
abstract = "The human musculoskeletal system is comprised of various joints which are characterized by
their unique morphology and kinematics. The joint coordinate system is tailored to comply with
the observed mechanical properties of joints, making their research more intuitive and in
accordance with standard clinical terminology. This coordinate system allows for spatial orientation to be described by three sequence independent Euler angles (the so-called “jaw-pitch-roll” angles), which mirrors the sequence independency of the final position of human limbs. The knee joint is the most complex, both anatomically and mechanically. It can be modeled as a four link open kinematic chain to which the joint coordinate system is applied. This coordinate system is usually described in Denavit-Hartenberg parameters, and the rotation transformation matrix is obtained using standard methods of vector algebra. In this paper another approach is used to derive the rotation transformation matrix, namely, the Rodrigues’ rotation formula. The utility of this algorithm is evident: the Rodrigues’ method provides an elegant solution which is obtained in a concise and efficient manner.",
publisher = "Beograd: Srpsko društvo za mehaniku",
journal = "Proceedings of the 8th International Congress of Serbian Society of Mechanics, Kragujevac, Serbia, June 28-30, 2021.",
title = "Rotation Transformation Matrix of the Joint Coordinate System with the Application to the Knee Joint",
url = "https://hdl.handle.net/21.15107/rcub_machinery_4641"
}

Rosić, N.. (2021). Rotation Transformation Matrix of the Joint Coordinate System with the Application to the Knee Joint. in Proceedings of the 8th International Congress of Serbian Society of Mechanics, Kragujevac, Serbia, June 28-30, 2021.
Beograd: Srpsko društvo za mehaniku..
https://hdl.handle.net/21.15107/rcub_machinery_4641

Rosić N. Rotation Transformation Matrix of the Joint Coordinate System with the Application to the Knee Joint. in Proceedings of the 8th International Congress of Serbian Society of Mechanics, Kragujevac, Serbia, June 28-30, 2021.. 2021;.
https://hdl.handle.net/21.15107/rcub_machinery_4641 .

Rosić, Nevena, "Rotation Transformation Matrix of the Joint Coordinate System with the Application to the Knee Joint" in Proceedings of the 8th International Congress of Serbian Society of Mechanics, Kragujevac, Serbia, June 28-30, 2021. (2021),
https://hdl.handle.net/21.15107/rcub_machinery_4641 .

TY  - CONF
AU  - Vesović, Mitra
AU  - Radulović, Radoslav
PY  - 2021
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/4542
AB  - The paper considers motion and stability of a holonomic mechanical system in the vertical 
plane of an arbitrary force field. Differential equations of motion are created for a given system on 
the basis of general theorems of dynamics. Insights into generalized coordinates, Lagrange’s 
equations of the second kind, covariant and Hamilton’s equations are presented. Additionally to 
numerical procedures in the paper, a review of the theoretical foundations is performed. Also, the 
conditions of static equilibrium are solved numerically and by applying the intersection of the two 
curves. The paper introduced kinetic as well as the potential energy of the system. The spatial 
arrangement of equilibrium positions and behavior of the potential energy in the environment of 
the equilibrium positions is shown. Finally, the stability of motion for analysis is approached 
through Lagrange - Dirichlet theorem. Moreover, special attention is paid to examining effects 
responses of the disturbed and undisturbed system. Nonlinear and linearized equations are obtained in order to check the stability of the system for disturbed and undisturbed motion using Hurwitz stability criterion. Various procedures are verificated by drawing the same conclusions.
PB  - Belgrade : Serbian Society of Mechanics
C3  - 8th International Congress of Serbian Society of Mechanics  Kragujevac, Serbia, June 28-30, 2021
T1  - BEHAVIOUR, EXAMINATION AND STABILITY OF THE CONSTRAINED  MECHANICAL SYSTEM DESCRIBED WITH NONLINEAR EQUATIONS
EP  - 63
SP  - Session M.5.2: General Mechanics (part II) pp. 54
UR  - https://hdl.handle.net/21.15107/rcub_machinery_4542
ER  - 

@conference{
author = "Vesović, Mitra and Radulović, Radoslav",
year = "2021",
abstract = "The paper considers motion and stability of a holonomic mechanical system in the vertical 
plane of an arbitrary force field. Differential equations of motion are created for a given system on 
the basis of general theorems of dynamics. Insights into generalized coordinates, Lagrange’s 
equations of the second kind, covariant and Hamilton’s equations are presented. Additionally to 
numerical procedures in the paper, a review of the theoretical foundations is performed. Also, the 
conditions of static equilibrium are solved numerically and by applying the intersection of the two 
curves. The paper introduced kinetic as well as the potential energy of the system. The spatial 
arrangement of equilibrium positions and behavior of the potential energy in the environment of 
the equilibrium positions is shown. Finally, the stability of motion for analysis is approached 
through Lagrange - Dirichlet theorem. Moreover, special attention is paid to examining effects 
responses of the disturbed and undisturbed system. Nonlinear and linearized equations are obtained in order to check the stability of the system for disturbed and undisturbed motion using Hurwitz stability criterion. Various procedures are verificated by drawing the same conclusions.",
publisher = "Belgrade : Serbian Society of Mechanics",
journal = "8th International Congress of Serbian Society of Mechanics  Kragujevac, Serbia, June 28-30, 2021",
title = "BEHAVIOUR, EXAMINATION AND STABILITY OF THE CONSTRAINED  MECHANICAL SYSTEM DESCRIBED WITH NONLINEAR EQUATIONS",
pages = "63-Session M.5.2: General Mechanics (part II) pp. 54",
url = "https://hdl.handle.net/21.15107/rcub_machinery_4542"
}

Vesović, M.,& Radulović, R.. (2021). BEHAVIOUR, EXAMINATION AND STABILITY OF THE CONSTRAINED  MECHANICAL SYSTEM DESCRIBED WITH NONLINEAR EQUATIONS. in 8th International Congress of Serbian Society of Mechanics  Kragujevac, Serbia, June 28-30, 2021
Belgrade : Serbian Society of Mechanics., Session M.5.2: General Mechanics (part II) pp. 54-63.
https://hdl.handle.net/21.15107/rcub_machinery_4542

Vesović M, Radulović R. BEHAVIOUR, EXAMINATION AND STABILITY OF THE CONSTRAINED  MECHANICAL SYSTEM DESCRIBED WITH NONLINEAR EQUATIONS. in 8th International Congress of Serbian Society of Mechanics  Kragujevac, Serbia, June 28-30, 2021. 2021;:Session M.5.2: General Mechanics (part II) pp. 54-63.
https://hdl.handle.net/21.15107/rcub_machinery_4542 .

Vesović, Mitra, Radulović, Radoslav, "BEHAVIOUR, EXAMINATION AND STABILITY OF THE CONSTRAINED  MECHANICAL SYSTEM DESCRIBED WITH NONLINEAR EQUATIONS" in 8th International Congress of Serbian Society of Mechanics  Kragujevac, Serbia, June 28-30, 2021 (2021):Session M.5.2: General Mechanics (part II) pp. 54-63,
https://hdl.handle.net/21.15107/rcub_machinery_4542 .

TY  - JOUR
AU  - Vesović, Mitra
AU  - Petrović, Goran R.
AU  - Radulović, Radoslav
PY  - 2021
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/3579
AB  - U cilju dobijanja uvida u rad mašine pre njene montaže i proizvodnje, kao i dobijanja dobre analize, ovaj rad predstavlja detaljna rešenja specifičnog problema iz oblasti analitičke mehanike. Pored numeričkih postupaka u radu, izvršen je i pregled teorijskih osnova. Razne vrste analiza su vrlo česte u mašinskom inženjerstvu, zbog mogućnosti aproksimacije složenih mašina. Za predloženi sistem date su Lagranžove jednačine prve vrste, kovarijantne i kontravarijantne jednačine, Hamiltonove jednačine, generalisane koordinate, kao i uvid u Kulonovu silu trenja. Takođe, rešeni su i uslovi statičke ravnoteže uz pomoć numeričkih i grafičkih postupaka - presekom dve krive. Konačno, razmatrana je i stabilnost kretanja poremećenog i neporemećenog kretanja.
AB  - In order to give an insight into the work of the machine before the production and assembly and to obtain good analysis, this paper presents detailed solutions to the specific problem occured in the field of analytical mechanics. In addition to numerical procedures in the paper, a review of the theoretical foundations was made.Various types of analysis are very common in mechanical engineering, due to the possibility of an approximation of complex machines. For the proposed system, Lagrange's equations of the first kind, covariant and contravariant equations, Hamiltons equations and the generalized coordinates, as well as insight in Coulumb friction force are provided.Also, the conditions of static equilibrium are solved numerically and using intersection of the two curves. Finally, stability of motion for the disturbed and undisturbed system was investigated.
PB  - Univerzitet u Beogradu - Mašinski fakultet, Beograd
T2  - FME Transactions
T1  - Analiza kretanja i stabilnosti holonomnog mehaničkog sistema u proizvoljnom polju sila
T1  - Analysis of the motion and stability of the holonomic mechanical system in the arbitrary force field
EP  - 205
IS  - 1
SP  - 195
VL  - 49
DO  - 10.5937/fme2101195V
ER  - 

@article{
author = "Vesović, Mitra and Petrović, Goran R. and Radulović, Radoslav",
year = "2021",
abstract = "U cilju dobijanja uvida u rad mašine pre njene montaže i proizvodnje, kao i dobijanja dobre analize, ovaj rad predstavlja detaljna rešenja specifičnog problema iz oblasti analitičke mehanike. Pored numeričkih postupaka u radu, izvršen je i pregled teorijskih osnova. Razne vrste analiza su vrlo česte u mašinskom inženjerstvu, zbog mogućnosti aproksimacije složenih mašina. Za predloženi sistem date su Lagranžove jednačine prve vrste, kovarijantne i kontravarijantne jednačine, Hamiltonove jednačine, generalisane koordinate, kao i uvid u Kulonovu silu trenja. Takođe, rešeni su i uslovi statičke ravnoteže uz pomoć numeričkih i grafičkih postupaka - presekom dve krive. Konačno, razmatrana je i stabilnost kretanja poremećenog i neporemećenog kretanja., In order to give an insight into the work of the machine before the production and assembly and to obtain good analysis, this paper presents detailed solutions to the specific problem occured in the field of analytical mechanics. In addition to numerical procedures in the paper, a review of the theoretical foundations was made.Various types of analysis are very common in mechanical engineering, due to the possibility of an approximation of complex machines. For the proposed system, Lagrange's equations of the first kind, covariant and contravariant equations, Hamiltons equations and the generalized coordinates, as well as insight in Coulumb friction force are provided.Also, the conditions of static equilibrium are solved numerically and using intersection of the two curves. Finally, stability of motion for the disturbed and undisturbed system was investigated.",
publisher = "Univerzitet u Beogradu - Mašinski fakultet, Beograd",
journal = "FME Transactions",
title = "Analiza kretanja i stabilnosti holonomnog mehaničkog sistema u proizvoljnom polju sila, Analysis of the motion and stability of the holonomic mechanical system in the arbitrary force field",
pages = "205-195",
number = "1",
volume = "49",
doi = "10.5937/fme2101195V"
}

Vesović, M., Petrović, G. R.,& Radulović, R.. (2021). Analiza kretanja i stabilnosti holonomnog mehaničkog sistema u proizvoljnom polju sila. in FME Transactions
Univerzitet u Beogradu - Mašinski fakultet, Beograd., 49(1), 195-205.
https://doi.org/10.5937/fme2101195V

Vesović M, Petrović GR, Radulović R. Analiza kretanja i stabilnosti holonomnog mehaničkog sistema u proizvoljnom polju sila. in FME Transactions. 2021;49(1):195-205.
doi:10.5937/fme2101195V .

Vesović, Mitra, Petrović, Goran R., Radulović, Radoslav, "Analiza kretanja i stabilnosti holonomnog mehaničkog sistema u proizvoljnom polju sila" in FME Transactions, 49, no. 1 (2021):195-205,
https://doi.org/10.5937/fme2101195V . .

TY  - CHAP
AU  - Atanasovska, Ivana
AU  - Momčilović, Dejan B.
AU  - Mitrović, Radivoje
AU  - Soldat, Nataša D.
AU  - Nesić, N.
PY  - 2020
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/3459
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 B. and Mitrović, Radivoje and Soldat, Nataša D. and Nesić, 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. B., Mitrović, R., Soldat, N. D.,& Nesić, 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 DB, Mitrović R, Soldat ND, Nesić 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 B., Mitrović, Radivoje, Soldat, Nataša D., Nesić, 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  - Atanasovska, Ivana
AU  - Hedrih, K.R.
AU  - Momčilović, Dejan B.
PY  - 2020
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/7543
AB  - The main performance of involute gears operation leads to the appearance of nonlinear dynamic behavior and impact. In this chapter the influence of mild wear of the tooth flanks of gears without machine finishing and surface hardening on the vibro-impact behavior is considered. For this purpose, a new theoretical model for vibro-impact dynamics of spur gears with mild wear on tooth flanks is developed and described. The developed theoretical model is based on the main postulates of a model of the central centric collision of two fictive rolling disks with radii equal to the radii of kinematic diameters of the pinion and the wheel, as well as on a combined analytical/numerical approach used finite element analysis for the calculation of contact deformations, contact pressure, and wear on tooth flanks surfaces. A particular gear pair for earth moving machine is used for presenting the developed model. The conclusions about the influence of mild wear on the vibroimpact oscillations during running-in period are described.
PB  - Springer Nature
C3  - Nonlinear Dynamics of Structures, Systems and Devices - Proceedings of the 1st International Nonline
T1  - A Theoretical Model for Vibro-Impact Dynamics of Spur Gears with Tooth Flanks Wear
EP  - 136
SP  - 127
DO  - 10.1007/978-3-030-34713-0_13
ER  - 

@conference{
author = "Atanasovska, Ivana and Hedrih, K.R. and Momčilović, Dejan B.",
year = "2020",
abstract = "The main performance of involute gears operation leads to the appearance of nonlinear dynamic behavior and impact. In this chapter the influence of mild wear of the tooth flanks of gears without machine finishing and surface hardening on the vibro-impact behavior is considered. For this purpose, a new theoretical model for vibro-impact dynamics of spur gears with mild wear on tooth flanks is developed and described. The developed theoretical model is based on the main postulates of a model of the central centric collision of two fictive rolling disks with radii equal to the radii of kinematic diameters of the pinion and the wheel, as well as on a combined analytical/numerical approach used finite element analysis for the calculation of contact deformations, contact pressure, and wear on tooth flanks surfaces. A particular gear pair for earth moving machine is used for presenting the developed model. The conclusions about the influence of mild wear on the vibroimpact oscillations during running-in period are described.",
publisher = "Springer Nature",
journal = "Nonlinear Dynamics of Structures, Systems and Devices - Proceedings of the 1st International Nonline",
title = "A Theoretical Model for Vibro-Impact Dynamics of Spur Gears with Tooth Flanks Wear",
pages = "136-127",
doi = "10.1007/978-3-030-34713-0_13"
}

Atanasovska, I., Hedrih, K.R.,& Momčilović, D. B.. (2020). A Theoretical Model for Vibro-Impact Dynamics of Spur Gears with Tooth Flanks Wear. in Nonlinear Dynamics of Structures, Systems and Devices - Proceedings of the 1st International Nonline
Springer Nature., 127-136.
https://doi.org/10.1007/978-3-030-34713-0_13

Atanasovska I, Hedrih K, Momčilović DB. A Theoretical Model for Vibro-Impact Dynamics of Spur Gears with Tooth Flanks Wear. in Nonlinear Dynamics of Structures, Systems and Devices - Proceedings of the 1st International Nonline. 2020;:127-136.
doi:10.1007/978-3-030-34713-0_13 .

Atanasovska, Ivana, Hedrih, K.R., Momčilović, Dejan B., "A Theoretical Model for Vibro-Impact Dynamics of Spur Gears with Tooth Flanks Wear" in Nonlinear Dynamics of Structures, Systems and Devices - Proceedings of the 1st International Nonline (2020):127-136,
https://doi.org/10.1007/978-3-030-34713-0_13 . .

TY  - JOUR
AU  - Jovanović, M.
AU  - Camagić, I
AU  - Sedmak, Simon
AU  - Zivković, P.
AU  - Sedmak, Aleksandar
PY  - 2020
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/3434
AB  - The welded joint is heterogeneous in its microstructure, mechanical and geometrical properties, thus the stress field is affected by different factors as well as by residual stress. Therefore, special procedures are needed for experimentally determining the fracture toughness in plane strain, K-Ic, and the impact toughness, usually associated with difficulties in interpreting the measured values. Notched specimens are tested by instrumented Charpy in order to determine impact energy and crack initiation and propagation energies. The pre-cracked specimens are tested by standard, using three-point bending specimens, as geometrically closest to Charpy specimens. In both cases, the notch and crack are located in all various regions of the welded joint of the high-strength low alloyed steel NIONIKRAL-70. Analysis of the results includes speculations on the ratio of energies for crack initiation and propagation vs. fracture toughness.
PB  - Institut za ispitivanje materijala, Beograd
T2  - Structural Integrity and Life
T1  - Crack initiation and propagation resistance of hsla steel welded joint constituents
EP  - 14
IS  - 1
SP  - 11
VL  - 20
UR  - https://hdl.handle.net/21.15107/rcub_machinery_3434
ER  - 

@article{
author = "Jovanović, M. and Camagić, I and Sedmak, Simon and Zivković, P. and Sedmak, Aleksandar",
year = "2020",
abstract = "The welded joint is heterogeneous in its microstructure, mechanical and geometrical properties, thus the stress field is affected by different factors as well as by residual stress. Therefore, special procedures are needed for experimentally determining the fracture toughness in plane strain, K-Ic, and the impact toughness, usually associated with difficulties in interpreting the measured values. Notched specimens are tested by instrumented Charpy in order to determine impact energy and crack initiation and propagation energies. The pre-cracked specimens are tested by standard, using three-point bending specimens, as geometrically closest to Charpy specimens. In both cases, the notch and crack are located in all various regions of the welded joint of the high-strength low alloyed steel NIONIKRAL-70. Analysis of the results includes speculations on the ratio of energies for crack initiation and propagation vs. fracture toughness.",
publisher = "Institut za ispitivanje materijala, Beograd",
journal = "Structural Integrity and Life",
title = "Crack initiation and propagation resistance of hsla steel welded joint constituents",
pages = "14-11",
number = "1",
volume = "20",
url = "https://hdl.handle.net/21.15107/rcub_machinery_3434"
}

Jovanović, M., Camagić, I., Sedmak, S., Zivković, P.,& Sedmak, A.. (2020). Crack initiation and propagation resistance of hsla steel welded joint constituents. in Structural Integrity and Life
Institut za ispitivanje materijala, Beograd., 20(1), 11-14.
https://hdl.handle.net/21.15107/rcub_machinery_3434

Jovanović M, Camagić I, Sedmak S, Zivković P, Sedmak A. Crack initiation and propagation resistance of hsla steel welded joint constituents. in Structural Integrity and Life. 2020;20(1):11-14.
https://hdl.handle.net/21.15107/rcub_machinery_3434 .

Jovanović, M., Camagić, I, Sedmak, Simon, Zivković, P., Sedmak, Aleksandar, "Crack initiation and propagation resistance of hsla steel welded joint constituents" in Structural Integrity and Life, 20, no. 1 (2020):11-14,
https://hdl.handle.net/21.15107/rcub_machinery_3434 .

TY  - CONF
AU  - Hedrih, Andjelka
AU  - Mitrovic-Jovanovic, Ana
AU  - Lazarević, Mihailo
PY  - 2020
UR  - 10.1007/978-3-030-49882-5
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/6447
AB  - Considering the fertilization process as an oscillatory phenomenon, based on mechanotransduction theory of sperm–oocyte interaction, influence of sperm velocity and their specific arrangement on outer surface of oocyte- Zona pellucida (ZP) relative to the oscillatory behavior of ZP was studied using discrete continuum oscillatory spherical net model of mouse ZP. For the calculated favorable impact angles of spermatozoa by using generalized Lissajous
curves, a parametric frequency analysis of oscillatory behavior of the knot molecules in the mouse ZP spherical net model is conducted. In order to mimic successful fertilization in physiological conditions in this numerical experiment, velocities of the progressive and hyperactivated spermatozoa were used. The resultant trajectories of knot molecules in mouse ZP (mZP) spherical net model,in the form of generalized Lissajous curves, are presented. Influences of the
sperm velocity and its arrangement on the resultant trajectory of the corresponding
knot molecules are discussed. Component displacements in the meridian and circular directions of the knot molecules of ZP are in the form of multi-frequency oscillations. Symmetrical arrangements of spermatozoa having effective velocities are more favorable for achieving a favorable oscillatory
multi-frequency state of mZP for a successful fertilization. Determining the optimal parameters of spermatozoa impact that will induce a ZP favorable oscillatory state opens the possibilities for more complete explanation of the fertilization process.
PB  - Springer Nature Switzerland AG 2020
C3  - Advanced Problems in Mechanics Proceedings of the XLVII International Summer School-Conference “Advanced Problems in Mechanics”, June 24-29, 2019, St. Petersburg, Russia
T1  - Influence of the sperm velocity on fertilization capacity in the oscillatory model of mouse zona pellucida
EP  - 21
SP  - 1
UR  - https://hdl.handle.net/21.15107/rcub_machinery_6447
ER  - 

@conference{
author = "Hedrih, Andjelka and Mitrovic-Jovanovic, Ana and Lazarević, Mihailo",
year = "2020",
abstract = "Considering the fertilization process as an oscillatory phenomenon, based on mechanotransduction theory of sperm–oocyte interaction, influence of sperm velocity and their specific arrangement on outer surface of oocyte- Zona pellucida (ZP) relative to the oscillatory behavior of ZP was studied using discrete continuum oscillatory spherical net model of mouse ZP. For the calculated favorable impact angles of spermatozoa by using generalized Lissajous
curves, a parametric frequency analysis of oscillatory behavior of the knot molecules in the mouse ZP spherical net model is conducted. In order to mimic successful fertilization in physiological conditions in this numerical experiment, velocities of the progressive and hyperactivated spermatozoa were used. The resultant trajectories of knot molecules in mouse ZP (mZP) spherical net model,in the form of generalized Lissajous curves, are presented. Influences of the
sperm velocity and its arrangement on the resultant trajectory of the corresponding
knot molecules are discussed. Component displacements in the meridian and circular directions of the knot molecules of ZP are in the form of multi-frequency oscillations. Symmetrical arrangements of spermatozoa having effective velocities are more favorable for achieving a favorable oscillatory
multi-frequency state of mZP for a successful fertilization. Determining the optimal parameters of spermatozoa impact that will induce a ZP favorable oscillatory state opens the possibilities for more complete explanation of the fertilization process.",
publisher = "Springer Nature Switzerland AG 2020",
journal = "Advanced Problems in Mechanics Proceedings of the XLVII International Summer School-Conference “Advanced Problems in Mechanics”, June 24-29, 2019, St. Petersburg, Russia",
title = "Influence of the sperm velocity on fertilization capacity in the oscillatory model of mouse zona pellucida",
pages = "21-1",
url = "https://hdl.handle.net/21.15107/rcub_machinery_6447"
}

Hedrih, A., Mitrovic-Jovanovic, A.,& Lazarević, M.. (2020). Influence of the sperm velocity on fertilization capacity in the oscillatory model of mouse zona pellucida. in Advanced Problems in Mechanics Proceedings of the XLVII International Summer School-Conference “Advanced Problems in Mechanics”, June 24-29, 2019, St. Petersburg, Russia
Springer Nature Switzerland AG 2020., 1-21.
https://hdl.handle.net/21.15107/rcub_machinery_6447

Hedrih A, Mitrovic-Jovanovic A, Lazarević M. Influence of the sperm velocity on fertilization capacity in the oscillatory model of mouse zona pellucida. in Advanced Problems in Mechanics Proceedings of the XLVII International Summer School-Conference “Advanced Problems in Mechanics”, June 24-29, 2019, St. Petersburg, Russia. 2020;:1-21.
https://hdl.handle.net/21.15107/rcub_machinery_6447 .

Hedrih, Andjelka, Mitrovic-Jovanovic, Ana, Lazarević, Mihailo, "Influence of the sperm velocity on fertilization capacity in the oscillatory model of mouse zona pellucida" in Advanced Problems in Mechanics Proceedings of the XLVII International Summer School-Conference “Advanced Problems in Mechanics”, June 24-29, 2019, St. Petersburg, Russia (2020):1-21,
https://hdl.handle.net/21.15107/rcub_machinery_6447 .

TY  - JOUR
AU  - Soldat, Nataša D.
AU  - Mitrović, Radivoje
AU  - Atanasovska, Ivana
AU  - Tomović, Radoslav
PY  - 2020
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/3406
AB  - This paper presents the development of a methodology for calculating radial ball bearing vibrations. First, analytical and numerical models were developed and then, the obtained results were experimentally verified. In the experiment, a test rig for a dynamic testing of bearings subjected to an external load was used. Special attention was paid to the analysis of the total bearing deformations and stiffness, being the main parameters that define the dynamic behaviour of a bearing. In order to determine total deformations of a ball bearing as an assembly, a finite element model of the bearing was developed. The results obtained from the new methodology for a particular ball bearing type have been verified by experimental results. The obtained correlations of the experimental and the numerical results are about 2.5%. Based on the calculations and the experimental testing of the chosen ball bearing type, under conditions of a variable radial load, the analysis of the influence of the radial load on the dynamic behaviour of a ball bearing was performed. The analysis of the obtained results showed that the vibration amplitude increases with a similar multiple factor as loads increase.
PB  - Univ Zagreb Fac Mechanical Engineering & Naval Architecture, Zagreb
T2  - Transactions of Famena
T1  - A methodology for analyzing radial ball bearing vibrations
EP  - 28
IS  - 1
SP  - 13
VL  - 44
DO  - 10.21278/TOF.44102
ER  - 

@article{
author = "Soldat, Nataša D. and Mitrović, Radivoje and Atanasovska, Ivana and Tomović, Radoslav",
year = "2020",
abstract = "This paper presents the development of a methodology for calculating radial ball bearing vibrations. First, analytical and numerical models were developed and then, the obtained results were experimentally verified. In the experiment, a test rig for a dynamic testing of bearings subjected to an external load was used. Special attention was paid to the analysis of the total bearing deformations and stiffness, being the main parameters that define the dynamic behaviour of a bearing. In order to determine total deformations of a ball bearing as an assembly, a finite element model of the bearing was developed. The results obtained from the new methodology for a particular ball bearing type have been verified by experimental results. The obtained correlations of the experimental and the numerical results are about 2.5%. Based on the calculations and the experimental testing of the chosen ball bearing type, under conditions of a variable radial load, the analysis of the influence of the radial load on the dynamic behaviour of a ball bearing was performed. The analysis of the obtained results showed that the vibration amplitude increases with a similar multiple factor as loads increase.",
publisher = "Univ Zagreb Fac Mechanical Engineering & Naval Architecture, Zagreb",
journal = "Transactions of Famena",
title = "A methodology for analyzing radial ball bearing vibrations",
pages = "28-13",
number = "1",
volume = "44",
doi = "10.21278/TOF.44102"
}

Soldat, N. D., Mitrović, R., Atanasovska, I.,& Tomović, R.. (2020). A methodology for analyzing radial ball bearing vibrations. in Transactions of Famena
Univ Zagreb Fac Mechanical Engineering & Naval Architecture, Zagreb., 44(1), 13-28.
https://doi.org/10.21278/TOF.44102

Soldat ND, Mitrović R, Atanasovska I, Tomović R. A methodology for analyzing radial ball bearing vibrations. in Transactions of Famena. 2020;44(1):13-28.
doi:10.21278/TOF.44102 .

Soldat, Nataša D., Mitrović, Radivoje, Atanasovska, Ivana, Tomović, Radoslav, "A methodology for analyzing radial ball bearing vibrations" in Transactions of Famena, 44, no. 1 (2020):13-28,
https://doi.org/10.21278/TOF.44102 . .

TY  - CONF
AU  - Atanasovska, Ivana
AU  - Momčilović, Dejan B.
AU  - Vulović, Snežana
PY  - 2019
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/7542
AB  - Major function of railway vehicles absorbers is to absorb energy through controlled deformation during frontal rail vehicle collisions. The results presented and discussed in this paper is a part of the research of one particular type of absorber consist of a thin-walled seamless tube and conical mandrel. The influence of the groove, which occurred during cold worked tube manufacturing, on the behavior and energy absorption of this type of shock absorber is analyzed. The coupled nonlinear Finite Element Analysis is used for calculation of stress-strain state and plastic deformation work/volume of tube absorbers with defects. The results of the research presented in this paper show that the grooves on outer surface of expansion tubes in some cases can be beneficial due to strain hardening process in root of stress concentrator i.e. defect. The beneficial effect of grooves is proven by simulation in which is obvious that the energy absorbed level could be higher on expansion tube with grooves.
C3  - Proceedings of the 7h International Congress of Serbian Society of Mechanics, Sremski Karlovci, Serbia
T1  - The influence of grooves on the behavior of steel tube shock absorbers
EP  - 6
SP  - 1
UR  - https://hdl.handle.net/21.15107/rcub_machinery_7542
ER  - 

@conference{
author = "Atanasovska, Ivana and Momčilović, Dejan B. and Vulović, Snežana",
year = "2019",
abstract = "Major function of railway vehicles absorbers is to absorb energy through controlled deformation during frontal rail vehicle collisions. The results presented and discussed in this paper is a part of the research of one particular type of absorber consist of a thin-walled seamless tube and conical mandrel. The influence of the groove, which occurred during cold worked tube manufacturing, on the behavior and energy absorption of this type of shock absorber is analyzed. The coupled nonlinear Finite Element Analysis is used for calculation of stress-strain state and plastic deformation work/volume of tube absorbers with defects. The results of the research presented in this paper show that the grooves on outer surface of expansion tubes in some cases can be beneficial due to strain hardening process in root of stress concentrator i.e. defect. The beneficial effect of grooves is proven by simulation in which is obvious that the energy absorbed level could be higher on expansion tube with grooves.",
journal = "Proceedings of the 7h International Congress of Serbian Society of Mechanics, Sremski Karlovci, Serbia",
title = "The influence of grooves on the behavior of steel tube shock absorbers",
pages = "6-1",
url = "https://hdl.handle.net/21.15107/rcub_machinery_7542"
}

Atanasovska, I., Momčilović, D. B.,& Vulović, S.. (2019). The influence of grooves on the behavior of steel tube shock absorbers. in Proceedings of the 7h International Congress of Serbian Society of Mechanics, Sremski Karlovci, Serbia, 1-6.
https://hdl.handle.net/21.15107/rcub_machinery_7542

Atanasovska I, Momčilović DB, Vulović S. The influence of grooves on the behavior of steel tube shock absorbers. in Proceedings of the 7h International Congress of Serbian Society of Mechanics, Sremski Karlovci, Serbia. 2019;:1-6.
https://hdl.handle.net/21.15107/rcub_machinery_7542 .

Atanasovska, Ivana, Momčilović, Dejan B., Vulović, Snežana, "The influence of grooves on the behavior of steel tube shock absorbers" in Proceedings of the 7h International Congress of Serbian Society of Mechanics, Sremski Karlovci, Serbia (2019):1-6,
https://hdl.handle.net/21.15107/rcub_machinery_7542 .

TY  - CONF
AU  - Atanasovska, Ivana
AU  - Hedrih (Stevanović), Katica
AU  - Momčilović, Dejan B.
PY  - 2019
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/7494
AB  - The main performances of involute gears operations lead to the appearance of nonlinear dynamic behaviour and impact. In this paper the influence of mild wear of the tooth flanks of gears without surface hardening on the vibro-impact behaviour is considered. For this purpose, a new theoretical model for vibro-impact dynamics of spur gears with mild wear on tooth flanks is developed and described. The developed theoretical model is based on the main postulates of a model of the central centric collision of two fictive rolling disks with radii equal to the radii of kinematic diameters of the pinion and the wheel, as well as on a combined analytical – Finite Element method for calculation the contact deformations, contact pressure and wear on tooth flanks surfaces. A particular gear pair is used for presentation of the developed model.
PB  - NODYS Publications, Rome, Italy
C3  - Book of abstracts –The First International Nonlinear Dynamics Conference-NODYCON2019, Rome, Italia
T1  - A theoretical model for vibro-impact dynamics of spur gears with tooth flanks wear
EP  - 38
SP  - 37
UR  - https://hdl.handle.net/21.15107/rcub_machinery_7494
ER  - 

@conference{
author = "Atanasovska, Ivana and Hedrih (Stevanović), Katica and Momčilović, Dejan B.",
year = "2019",
abstract = "The main performances of involute gears operations lead to the appearance of nonlinear dynamic behaviour and impact. In this paper the influence of mild wear of the tooth flanks of gears without surface hardening on the vibro-impact behaviour is considered. For this purpose, a new theoretical model for vibro-impact dynamics of spur gears with mild wear on tooth flanks is developed and described. The developed theoretical model is based on the main postulates of a model of the central centric collision of two fictive rolling disks with radii equal to the radii of kinematic diameters of the pinion and the wheel, as well as on a combined analytical – Finite Element method for calculation the contact deformations, contact pressure and wear on tooth flanks surfaces. A particular gear pair is used for presentation of the developed model.",
publisher = "NODYS Publications, Rome, Italy",
journal = "Book of abstracts –The First International Nonlinear Dynamics Conference-NODYCON2019, Rome, Italia",
title = "A theoretical model for vibro-impact dynamics of spur gears with tooth flanks wear",
pages = "38-37",
url = "https://hdl.handle.net/21.15107/rcub_machinery_7494"
}

Atanasovska, I., Hedrih (Stevanović), K.,& Momčilović, D. B.. (2019). A theoretical model for vibro-impact dynamics of spur gears with tooth flanks wear. in Book of abstracts –The First International Nonlinear Dynamics Conference-NODYCON2019, Rome, Italia
NODYS Publications, Rome, Italy., 37-38.
https://hdl.handle.net/21.15107/rcub_machinery_7494

Atanasovska I, Hedrih (Stevanović) K, Momčilović DB. A theoretical model for vibro-impact dynamics of spur gears with tooth flanks wear. in Book of abstracts –The First International Nonlinear Dynamics Conference-NODYCON2019, Rome, Italia. 2019;:37-38.
https://hdl.handle.net/21.15107/rcub_machinery_7494 .

Atanasovska, Ivana, Hedrih (Stevanović), Katica, Momčilović, Dejan B., "A theoretical model for vibro-impact dynamics of spur gears with tooth flanks wear" in Book of abstracts –The First International Nonlinear Dynamics Conference-NODYCON2019, Rome, Italia (2019):37-38,
https://hdl.handle.net/21.15107/rcub_machinery_7494 .

TY  - CONF
AU  - Camagić, Ivica
AU  - Kirin, Snežana
AU  - Sedmak, Aleksandar
AU  - Burzić, Zijah
PY  - 2019
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/3014
AB  - Risk based analysis of temperature and time effects on fracture toughness values is applied to different regions of a welded joint made of low-alloyed Cr-Mo steel A-387 Gr. B, designed for high temperature applications. Heterogeneity of microstructure and properties of welded joint is evaluated by testing standard 3BP specimens with crack tip located at different regions of a joint, including the base metal (BM), weld metal (WM) and heat-affected-zone (HAZ). Experiments were performed both at the room temperature and at design working temperature, 540 rectangle C. Based on these results, fracture toughness values are determined and used for risk based analysis, including risk matrix presentation as the basis for decision making process.
PB  - Elsevier Science Bv, Amsterdam
C3  - Procedia Structural Integrity - 25th International Conference on Fracture and Structural Integrity
T1  - Risk based analysis of temperature and time effects on brittle fracture of A-387 Gr. B welded joint
EP  - 384
SP  - 379
VL  - 18
DO  - 10.1016/j.prostr.2019.08.178
ER  - 

@conference{
author = "Camagić, Ivica and Kirin, Snežana and Sedmak, Aleksandar and Burzić, Zijah",
year = "2019",
abstract = "Risk based analysis of temperature and time effects on fracture toughness values is applied to different regions of a welded joint made of low-alloyed Cr-Mo steel A-387 Gr. B, designed for high temperature applications. Heterogeneity of microstructure and properties of welded joint is evaluated by testing standard 3BP specimens with crack tip located at different regions of a joint, including the base metal (BM), weld metal (WM) and heat-affected-zone (HAZ). Experiments were performed both at the room temperature and at design working temperature, 540 rectangle C. Based on these results, fracture toughness values are determined and used for risk based analysis, including risk matrix presentation as the basis for decision making process.",
publisher = "Elsevier Science Bv, Amsterdam",
journal = "Procedia Structural Integrity - 25th International Conference on Fracture and Structural Integrity",
title = "Risk based analysis of temperature and time effects on brittle fracture of A-387 Gr. B welded joint",
pages = "384-379",
volume = "18",
doi = "10.1016/j.prostr.2019.08.178"
}

Camagić, I., Kirin, S., Sedmak, A.,& Burzić, Z.. (2019). Risk based analysis of temperature and time effects on brittle fracture of A-387 Gr. B welded joint. in Procedia Structural Integrity - 25th International Conference on Fracture and Structural Integrity
Elsevier Science Bv, Amsterdam., 18, 379-384.
https://doi.org/10.1016/j.prostr.2019.08.178

Camagić I, Kirin S, Sedmak A, Burzić Z. Risk based analysis of temperature and time effects on brittle fracture of A-387 Gr. B welded joint. in Procedia Structural Integrity - 25th International Conference on Fracture and Structural Integrity. 2019;18:379-384.
doi:10.1016/j.prostr.2019.08.178 .

Camagić, Ivica, Kirin, Snežana, Sedmak, Aleksandar, Burzić, Zijah, "Risk based analysis of temperature and time effects on brittle fracture of A-387 Gr. B welded joint" in Procedia Structural Integrity - 25th International Conference on Fracture and Structural Integrity, 18 (2019):379-384,
https://doi.org/10.1016/j.prostr.2019.08.178 . .

TY  - CONF
AU  - Camagić, Ivica
AU  - Sedmak, Simon
AU  - Sedmak, Aleksandar
AU  - Burzić, Zijah
PY  - 2019
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/3013
AB  - The influence of temperature on fracture toughness values in different regions of a welded joint is analysed low-alloyed Cr-Mo steel A-387 Gr. B, designed for high temperature applications. Heterogeneity of microstructure and properties of welded joint is evaluated by testing standard 3BP specimens with crack tip located at different regions of a joint, including the base metal (BM), weld metal (WM) and heat-affected-zone (HAZ). Experiments were performed both at the room temperature and at design working temperature, 5400C. Based on these results, temperature effect on crack resistance is established for all different regions in a welded joint. 2019 The Authors. Published by Elsevier B.V.
PB  - Elsevier Science Bv, Amsterdam
C3  - Procedia Structural Integrity - 25th International Conference on Fracture and Structural Integrity
T1  - Influence of temperature on fracture toughness values in different regions of A-387 Gr. B welded joint
EP  - 213
SP  - 205
VL  - 18
DO  - 10.1016/j.prostr.2019.08.155
ER  - 

@conference{
author = "Camagić, Ivica and Sedmak, Simon and Sedmak, Aleksandar and Burzić, Zijah",
year = "2019",
abstract = "The influence of temperature on fracture toughness values in different regions of a welded joint is analysed low-alloyed Cr-Mo steel A-387 Gr. B, designed for high temperature applications. Heterogeneity of microstructure and properties of welded joint is evaluated by testing standard 3BP specimens with crack tip located at different regions of a joint, including the base metal (BM), weld metal (WM) and heat-affected-zone (HAZ). Experiments were performed both at the room temperature and at design working temperature, 5400C. Based on these results, temperature effect on crack resistance is established for all different regions in a welded joint. 2019 The Authors. Published by Elsevier B.V.",
publisher = "Elsevier Science Bv, Amsterdam",
journal = "Procedia Structural Integrity - 25th International Conference on Fracture and Structural Integrity",
title = "Influence of temperature on fracture toughness values in different regions of A-387 Gr. B welded joint",
pages = "213-205",
volume = "18",
doi = "10.1016/j.prostr.2019.08.155"
}

Camagić, I., Sedmak, S., Sedmak, A.,& Burzić, Z.. (2019). Influence of temperature on fracture toughness values in different regions of A-387 Gr. B welded joint. in Procedia Structural Integrity - 25th International Conference on Fracture and Structural Integrity
Elsevier Science Bv, Amsterdam., 18, 205-213.
https://doi.org/10.1016/j.prostr.2019.08.155

Camagić I, Sedmak S, Sedmak A, Burzić Z. Influence of temperature on fracture toughness values in different regions of A-387 Gr. B welded joint. in Procedia Structural Integrity - 25th International Conference on Fracture and Structural Integrity. 2019;18:205-213.
doi:10.1016/j.prostr.2019.08.155 .

Camagić, Ivica, Sedmak, Simon, Sedmak, Aleksandar, Burzić, Zijah, "Influence of temperature on fracture toughness values in different regions of A-387 Gr. B welded joint" in Procedia Structural Integrity - 25th International Conference on Fracture and Structural Integrity, 18 (2019):205-213,
https://doi.org/10.1016/j.prostr.2019.08.155 . .

TY  - CONF
AU  - Camagić, Ivica
AU  - Sedmak, Aleksandar
AU  - Sedmak, Simon
AU  - Burzić, Zijah
PY  - 2019
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/3006
AB  - The influence of temperature on impact and fracture toughness values in different regions of a welded joint is analysed for low-alloyed Cr-Mo steel A-387 Gr. B, designed for high temperature applications. Standard Charpy specimens were tested on instrumented pendulum to separate total impact energy into energy for initiation and propagation energy for base metal (BM), weld metal (WM) and heat-affected-zone (HAZ). Standard three point bending (3BP) specimens with crack tip located at different regions of a joint (BM, WM, HAZ), were used for fracture toughness testing. Experiments were performed both at the room temperature and at design working temperature, 540 degrees C, which is the focus of this paper, to evaluate temperature effect on both notch and crack resistance for all different regions in a welded joint. Moreover, the relation between crack initiation energy and fracture toughness is established, purely on empirical base.
PB  - Elsevier Science Bv, Amsterdam
C3  - Procedia Structural Integrity - 25th International Conference on Fracture and Structural Integrity
T1  - Relation between impact and fracture toughness of A-387 Gr. B welded joint
EP  - 907
SP  - 903
VL  - 18
DO  - 10.1016/j.prostr.2019.08.241
ER  - 

@conference{
author = "Camagić, Ivica and Sedmak, Aleksandar and Sedmak, Simon and Burzić, Zijah",
year = "2019",
abstract = "The influence of temperature on impact and fracture toughness values in different regions of a welded joint is analysed for low-alloyed Cr-Mo steel A-387 Gr. B, designed for high temperature applications. Standard Charpy specimens were tested on instrumented pendulum to separate total impact energy into energy for initiation and propagation energy for base metal (BM), weld metal (WM) and heat-affected-zone (HAZ). Standard three point bending (3BP) specimens with crack tip located at different regions of a joint (BM, WM, HAZ), were used for fracture toughness testing. Experiments were performed both at the room temperature and at design working temperature, 540 degrees C, which is the focus of this paper, to evaluate temperature effect on both notch and crack resistance for all different regions in a welded joint. Moreover, the relation between crack initiation energy and fracture toughness is established, purely on empirical base.",
publisher = "Elsevier Science Bv, Amsterdam",
journal = "Procedia Structural Integrity - 25th International Conference on Fracture and Structural Integrity",
title = "Relation between impact and fracture toughness of A-387 Gr. B welded joint",
pages = "907-903",
volume = "18",
doi = "10.1016/j.prostr.2019.08.241"
}

Camagić, I., Sedmak, A., Sedmak, S.,& Burzić, Z.. (2019). Relation between impact and fracture toughness of A-387 Gr. B welded joint. in Procedia Structural Integrity - 25th International Conference on Fracture and Structural Integrity
Elsevier Science Bv, Amsterdam., 18, 903-907.
https://doi.org/10.1016/j.prostr.2019.08.241

Camagić I, Sedmak A, Sedmak S, Burzić Z. Relation between impact and fracture toughness of A-387 Gr. B welded joint. in Procedia Structural Integrity - 25th International Conference on Fracture and Structural Integrity. 2019;18:903-907.
doi:10.1016/j.prostr.2019.08.241 .

Camagić, Ivica, Sedmak, Aleksandar, Sedmak, Simon, Burzić, Zijah, "Relation between impact and fracture toughness of A-387 Gr. B welded joint" in Procedia Structural Integrity - 25th International Conference on Fracture and Structural Integrity, 18 (2019):903-907,
https://doi.org/10.1016/j.prostr.2019.08.241 . .

TY  - JOUR
AU  - Jeremić, Bojan
AU  - Radulović, Radoslav
AU  - Zorić, Nemanja
AU  - Dražić, Milan
PY  - 2019
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/2997
AB  - The paper considers realization of the brachistochronic motion of a nonholonomic mechanical system, composed of variable mass particles, by means of an ideal holonomic constraint with restricted reaction. It is assumed that the system performs planar motion in an arbitrary field of forces and that it has two degrees of freedom. In addition, the laws of the time-rate of mass variation of the particles, as well as relative velocities of the expelled and gained particles, respectively, are known. Restricted reaction of the holonomic constraint is taken for the scalar control. Applying Pontryagin's maximum principle and singular optimal control theory, the problem of brachistochronic motion is solved as a two-point boundary value problem (TPBVP). Since the reaction of the constraint is restricted, different types of control structures are examined, from singular to totally nonsingular. The considerations are illustrated via an example.
PB  - Univerzitet u Nišu - Prirodno-matematički fakultet - Departmant za matematiku i informatiku, Niš
T2  - Filomat
T1  - Realizing Brachistochronic Planar Motion of a Variable Mass Nonholonomic Mechanical System by an Ideal Holonomic Constraint with Restricted Reaction
EP  - 4401
IS  - 14
SP  - 4387
VL  - 33
DO  - 10.2298/FIL1914387J
ER  - 

@article{
author = "Jeremić, Bojan and Radulović, Radoslav and Zorić, Nemanja and Dražić, Milan",
year = "2019",
abstract = "The paper considers realization of the brachistochronic motion of a nonholonomic mechanical system, composed of variable mass particles, by means of an ideal holonomic constraint with restricted reaction. It is assumed that the system performs planar motion in an arbitrary field of forces and that it has two degrees of freedom. In addition, the laws of the time-rate of mass variation of the particles, as well as relative velocities of the expelled and gained particles, respectively, are known. Restricted reaction of the holonomic constraint is taken for the scalar control. Applying Pontryagin's maximum principle and singular optimal control theory, the problem of brachistochronic motion is solved as a two-point boundary value problem (TPBVP). Since the reaction of the constraint is restricted, different types of control structures are examined, from singular to totally nonsingular. The considerations are illustrated via an example.",
publisher = "Univerzitet u Nišu - Prirodno-matematički fakultet - Departmant za matematiku i informatiku, Niš",
journal = "Filomat",
title = "Realizing Brachistochronic Planar Motion of a Variable Mass Nonholonomic Mechanical System by an Ideal Holonomic Constraint with Restricted Reaction",
pages = "4401-4387",
number = "14",
volume = "33",
doi = "10.2298/FIL1914387J"
}

Jeremić, B., Radulović, R., Zorić, N.,& Dražić, M.. (2019). Realizing Brachistochronic Planar Motion of a Variable Mass Nonholonomic Mechanical System by an Ideal Holonomic Constraint with Restricted Reaction. in Filomat
Univerzitet u Nišu - Prirodno-matematički fakultet - Departmant za matematiku i informatiku, Niš., 33(14), 4387-4401.
https://doi.org/10.2298/FIL1914387J

Jeremić B, Radulović R, Zorić N, Dražić M. Realizing Brachistochronic Planar Motion of a Variable Mass Nonholonomic Mechanical System by an Ideal Holonomic Constraint with Restricted Reaction. in Filomat. 2019;33(14):4387-4401.
doi:10.2298/FIL1914387J .

Jeremić, Bojan, Radulović, Radoslav, Zorić, Nemanja, Dražić, Milan, "Realizing Brachistochronic Planar Motion of a Variable Mass Nonholonomic Mechanical System by an Ideal Holonomic Constraint with Restricted Reaction" in Filomat, 33, no. 14 (2019):4387-4401,
https://doi.org/10.2298/FIL1914387J . .

TY  - JOUR
AU  - Li, Wei
AU  - Huang, Dongmei
AU  - Zhang, Meiting
AU  - Trišović, Nataša
AU  - Zhao, Junfeng
PY  - 2019
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/3145
AB  - Fractional-order PID (FOPID) controller, as the results of recent development of fractional calculus, is becoming wide-used in many deterministic dynamical systems, but not in stochastic dynamical systems. This paper explores stochastic bifurcation of a generalized Van del Pol (VDP) system under the control of FOPID controller. Firstly, introducing the transformation between fast-varying and slow-varying variables of the system response, and utilizing the properties of fractional calculus, we obtain a new expression in the form of slow-varying variables for FOPID controller. Based on this work, the stochastic averaging method is applied to obtain the Fokker-Planck-Kolmogorov (FPK) equation and the stationary probability density function (PDF) of the amplitude response. Then a new numerical algorithm is proposed to testify the analytical results in the case of the coexistence of fractional integral and fractional derivative. After that, stochastic bifurcations induced by the order of the fractional integral, the order of the fractional derivative and the coefficient in FOPID controller are investigated in detail. The agreement between analytical and numerical results verifies the correctness and effectiveness of our proposed methods.
PB  - Pergamon-Elsevier Science Ltd, Oxford
T2  - Chaos Solitons & Fractals
T1  - Bifurcation control of a generalized VDP system driven by color-noise excitation via FOPID controller
EP  - 38
SP  - 30
VL  - 121
DO  - 10.1016/j.chaos.2019.01.026
ER  - 

@article{
author = "Li, Wei and Huang, Dongmei and Zhang, Meiting and Trišović, Nataša and Zhao, Junfeng",
year = "2019",
abstract = "Fractional-order PID (FOPID) controller, as the results of recent development of fractional calculus, is becoming wide-used in many deterministic dynamical systems, but not in stochastic dynamical systems. This paper explores stochastic bifurcation of a generalized Van del Pol (VDP) system under the control of FOPID controller. Firstly, introducing the transformation between fast-varying and slow-varying variables of the system response, and utilizing the properties of fractional calculus, we obtain a new expression in the form of slow-varying variables for FOPID controller. Based on this work, the stochastic averaging method is applied to obtain the Fokker-Planck-Kolmogorov (FPK) equation and the stationary probability density function (PDF) of the amplitude response. Then a new numerical algorithm is proposed to testify the analytical results in the case of the coexistence of fractional integral and fractional derivative. After that, stochastic bifurcations induced by the order of the fractional integral, the order of the fractional derivative and the coefficient in FOPID controller are investigated in detail. The agreement between analytical and numerical results verifies the correctness and effectiveness of our proposed methods.",
publisher = "Pergamon-Elsevier Science Ltd, Oxford",
journal = "Chaos Solitons & Fractals",
title = "Bifurcation control of a generalized VDP system driven by color-noise excitation via FOPID controller",
pages = "38-30",
volume = "121",
doi = "10.1016/j.chaos.2019.01.026"
}

Li, W., Huang, D., Zhang, M., Trišović, N.,& Zhao, J.. (2019). Bifurcation control of a generalized VDP system driven by color-noise excitation via FOPID controller. in Chaos Solitons & Fractals
Pergamon-Elsevier Science Ltd, Oxford., 121, 30-38.
https://doi.org/10.1016/j.chaos.2019.01.026

Li W, Huang D, Zhang M, Trišović N, Zhao J. Bifurcation control of a generalized VDP system driven by color-noise excitation via FOPID controller. in Chaos Solitons & Fractals. 2019;121:30-38.
doi:10.1016/j.chaos.2019.01.026 .

Li, Wei, Huang, Dongmei, Zhang, Meiting, Trišović, Nataša, Zhao, Junfeng, "Bifurcation control of a generalized VDP system driven by color-noise excitation via FOPID controller" in Chaos Solitons & Fractals, 121 (2019):30-38,
https://doi.org/10.1016/j.chaos.2019.01.026 . .

TY  - CONF
AU  - Camagić, Ivica
AU  - Burzić, Zijah
AU  - Sedmak, Simon
AU  - Sedmak, Aleksandar
AU  - Lazarević, Dragan
PY  - 2019
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/3022
AB  - Integrity and life assessment of structural elements or structures subjected to variable loads is necessary in order to define the control interval and removal of damages that occurred during exploitation. Integrity and life assessment of a reactor was carried out with the previously performed welding technology qualification for new and exploited parent material sheets, made of Cr-Mo steel A-387 Gr. B, with a thickness 102 mm. Exploited parent material is the part of a reactor mantle which was in exploitation for over 40 years and is in the repair stage, i.e. its mantle is being replaced with the new material. Obtained test results and their analysis should provide a practical contribution to the assessment of exploitation conditions effects on the behaviour of parent material, welded joint components and the pressure vessel (reactor) used for exploitation at elevated temperatures, all for the purpose of integrity and life assessment of the structure, along with the revitalisation and work life extension of process equipment (reactor), made of steel used for exploitation at elevated temperatures.
PB  - Elsevier Science Bv, Amsterdam
C3  - Procedia Structural Integrity - 25th International Conference on Fracture and Structural Integrity
T1  - Integrity and Life Assessment Procedure for a Reactor
EP  - 390
SP  - 385
VL  - 18
DO  - 10.1016/j.prostr.2019.08.179
ER  - 

@conference{
author = "Camagić, Ivica and Burzić, Zijah and Sedmak, Simon and Sedmak, Aleksandar and Lazarević, Dragan",
year = "2019",
abstract = "Integrity and life assessment of structural elements or structures subjected to variable loads is necessary in order to define the control interval and removal of damages that occurred during exploitation. Integrity and life assessment of a reactor was carried out with the previously performed welding technology qualification for new and exploited parent material sheets, made of Cr-Mo steel A-387 Gr. B, with a thickness 102 mm. Exploited parent material is the part of a reactor mantle which was in exploitation for over 40 years and is in the repair stage, i.e. its mantle is being replaced with the new material. Obtained test results and their analysis should provide a practical contribution to the assessment of exploitation conditions effects on the behaviour of parent material, welded joint components and the pressure vessel (reactor) used for exploitation at elevated temperatures, all for the purpose of integrity and life assessment of the structure, along with the revitalisation and work life extension of process equipment (reactor), made of steel used for exploitation at elevated temperatures.",
publisher = "Elsevier Science Bv, Amsterdam",
journal = "Procedia Structural Integrity - 25th International Conference on Fracture and Structural Integrity",
title = "Integrity and Life Assessment Procedure for a Reactor",
pages = "390-385",
volume = "18",
doi = "10.1016/j.prostr.2019.08.179"
}

Camagić, I., Burzić, Z., Sedmak, S., Sedmak, A.,& Lazarević, D.. (2019). Integrity and Life Assessment Procedure for a Reactor. in Procedia Structural Integrity - 25th International Conference on Fracture and Structural Integrity
Elsevier Science Bv, Amsterdam., 18, 385-390.
https://doi.org/10.1016/j.prostr.2019.08.179

Camagić I, Burzić Z, Sedmak S, Sedmak A, Lazarević D. Integrity and Life Assessment Procedure for a Reactor. in Procedia Structural Integrity - 25th International Conference on Fracture and Structural Integrity. 2019;18:385-390.
doi:10.1016/j.prostr.2019.08.179 .

Camagić, Ivica, Burzić, Zijah, Sedmak, Simon, Sedmak, Aleksandar, Lazarević, Dragan, "Integrity and Life Assessment Procedure for a Reactor" in Procedia Structural Integrity - 25th International Conference on Fracture and Structural Integrity, 18 (2019):385-390,
https://doi.org/10.1016/j.prostr.2019.08.179 . .

TY  - CONF
AU  - Aranđelović, Nevena
AU  - Buljak, Vladimir
PY  - 2019
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/4639
AB  - As stent technology moves forward, there’s a growing need for fast and accurate stent
deployment visualizations. To that end, the Finite Element Method was used for quasi-static
analysis of a balloon expandable stent. A model was created, which includes a stent, balloon,
artery and a plaque. In order to achieve faster computation, various approximations have been
included, especially considering the balloon, artery and plaque. Some non-linear problems are
assessed, like the contact between different parts of the model. Arterial tissue and plaque are
modeled as isotropic hyperelastic materials. The balloon was specially designed and discretized to avoid the computational difficulties during inflation. Thanks to the complexity of this model,
useful results can be obtained in a reasonable time frame. The software used for FEM analysis
was ABAQUS.
PB  - Beograd : Srpsko društvo za mehaniku
C3  - Proceeding of 7th International Congress of Serbian Society of Mechanics Sremski Karlovci, Serbia, June 24-26, 2019.
T1  - FEM ANALYSIS OF CORONARY STENT DEPLOYMENT
UR  - https://hdl.handle.net/21.15107/rcub_machinery_4639
ER  - 

@conference{
author = "Aranđelović, Nevena and Buljak, Vladimir",
year = "2019",
abstract = "As stent technology moves forward, there’s a growing need for fast and accurate stent
deployment visualizations. To that end, the Finite Element Method was used for quasi-static
analysis of a balloon expandable stent. A model was created, which includes a stent, balloon,
artery and a plaque. In order to achieve faster computation, various approximations have been
included, especially considering the balloon, artery and plaque. Some non-linear problems are
assessed, like the contact between different parts of the model. Arterial tissue and plaque are
modeled as isotropic hyperelastic materials. The balloon was specially designed and discretized to avoid the computational difficulties during inflation. Thanks to the complexity of this model,
useful results can be obtained in a reasonable time frame. The software used for FEM analysis
was ABAQUS.",
publisher = "Beograd : Srpsko društvo za mehaniku",
journal = "Proceeding of 7th International Congress of Serbian Society of Mechanics Sremski Karlovci, Serbia, June 24-26, 2019.",
title = "FEM ANALYSIS OF CORONARY STENT DEPLOYMENT",
url = "https://hdl.handle.net/21.15107/rcub_machinery_4639"
}

Aranđelović, N.,& Buljak, V.. (2019). FEM ANALYSIS OF CORONARY STENT DEPLOYMENT. in Proceeding of 7th International Congress of Serbian Society of Mechanics Sremski Karlovci, Serbia, June 24-26, 2019.
Beograd : Srpsko društvo za mehaniku..
https://hdl.handle.net/21.15107/rcub_machinery_4639

Aranđelović N, Buljak V. FEM ANALYSIS OF CORONARY STENT DEPLOYMENT. in Proceeding of 7th International Congress of Serbian Society of Mechanics Sremski Karlovci, Serbia, June 24-26, 2019.. 2019;.
https://hdl.handle.net/21.15107/rcub_machinery_4639 .

Aranđelović, Nevena, Buljak, Vladimir, "FEM ANALYSIS OF CORONARY STENT DEPLOYMENT" in Proceeding of 7th International Congress of Serbian Society of Mechanics Sremski Karlovci, Serbia, June 24-26, 2019. (2019),
https://hdl.handle.net/21.15107/rcub_machinery_4639 .

TY  - CONF
AU  - Aranđelović, Nevena
AU  - Lazarević, Mihailo
PY  - 2019
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/4101
AB  - In this paper we have analyzed the standard linear solid model (Zener model) of viscoelastic
materials. A one-dimensional analysis was executed analytically (in MATLAB) and numerically
(in ABAQUS), and corresponding graphs have been produced. The fractional differential form of
the Zener model was then implemented, as it has proven to be a better match for the experimental
test results for viscoelastic materials. Finally, all of the results were compared and discussed.
PB  - Beograd : Srpsko društvo za mehaniku
C3  - Proceeding of 7th International Congress of Serbian Society of Mechanics Sremski Karlovci, Serbia, June 24-26, 2019.
T1  - Comparative analysis of the standard linear solid model
UR  - https://hdl.handle.net/21.15107/rcub_machinery_4101
ER  - 

@conference{
author = "Aranđelović, Nevena and Lazarević, Mihailo",
year = "2019",
abstract = "In this paper we have analyzed the standard linear solid model (Zener model) of viscoelastic
materials. A one-dimensional analysis was executed analytically (in MATLAB) and numerically
(in ABAQUS), and corresponding graphs have been produced. The fractional differential form of
the Zener model was then implemented, as it has proven to be a better match for the experimental
test results for viscoelastic materials. Finally, all of the results were compared and discussed.",
publisher = "Beograd : Srpsko društvo za mehaniku",
journal = "Proceeding of 7th International Congress of Serbian Society of Mechanics Sremski Karlovci, Serbia, June 24-26, 2019.",
title = "Comparative analysis of the standard linear solid model",
url = "https://hdl.handle.net/21.15107/rcub_machinery_4101"
}

Aranđelović, N.,& Lazarević, M.. (2019). Comparative analysis of the standard linear solid model. in Proceeding of 7th International Congress of Serbian Society of Mechanics Sremski Karlovci, Serbia, June 24-26, 2019.
Beograd : Srpsko društvo za mehaniku..
https://hdl.handle.net/21.15107/rcub_machinery_4101

Aranđelović N, Lazarević M. Comparative analysis of the standard linear solid model. in Proceeding of 7th International Congress of Serbian Society of Mechanics Sremski Karlovci, Serbia, June 24-26, 2019.. 2019;.
https://hdl.handle.net/21.15107/rcub_machinery_4101 .

Aranđelović, Nevena, Lazarević, Mihailo, "Comparative analysis of the standard linear solid model" in Proceeding of 7th International Congress of Serbian Society of Mechanics Sremski Karlovci, Serbia, June 24-26, 2019. (2019),
https://hdl.handle.net/21.15107/rcub_machinery_4101 .

TY  - CONF
AU  - Radulović, Radoslav
AU  - Jeremić, Bojan
AU  - Obradović, Aleksandar
PY  - 2019
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/4034
AB  - The paper considers realization of the brachistochronic motion of a nonholonomic
mechanical system, composed of variable mass particles, by means of an ideal holonomic
constraint. It is assumed that the system performs planar motion in an arbitrary field of forces
and that it has two degrees of freedom. In addition, the laws of the time-rate of mass variation of
the particles, as well as relative velocities of the expelled and gained particles, respectively, are
known. The first time-derivative of quasi-velocity is taken as control variable. Applying
Pontryagin's maximum principle and singular optimal control theory, the problem of
brachistochronic motion is solved as a two-point boundary value problem (TPBVP). The
considerations are illustrated via an example.
PB  - Srpsko društvo za mehaniku
C3  - Proceeding of 7th International Congress of Serbian Society of Mechanics Sremski Karlovci, Serbia, June 24-26, 2019
T1  - Realization of the brachistohronic motion of a nonholonomic variable mass mechanical system by ideal holonomic constraint
SP  - M1i
UR  - https://hdl.handle.net/21.15107/rcub_machinery_4034
ER  - 

@conference{
author = "Radulović, Radoslav and Jeremić, Bojan and Obradović, Aleksandar",
year = "2019",
abstract = "The paper considers realization of the brachistochronic motion of a nonholonomic
mechanical system, composed of variable mass particles, by means of an ideal holonomic
constraint. It is assumed that the system performs planar motion in an arbitrary field of forces
and that it has two degrees of freedom. In addition, the laws of the time-rate of mass variation of
the particles, as well as relative velocities of the expelled and gained particles, respectively, are
known. The first time-derivative of quasi-velocity is taken as control variable. Applying
Pontryagin's maximum principle and singular optimal control theory, the problem of
brachistochronic motion is solved as a two-point boundary value problem (TPBVP). The
considerations are illustrated via an example.",
publisher = "Srpsko društvo za mehaniku",
journal = "Proceeding of 7th International Congress of Serbian Society of Mechanics Sremski Karlovci, Serbia, June 24-26, 2019",
title = "Realization of the brachistohronic motion of a nonholonomic variable mass mechanical system by ideal holonomic constraint",
pages = "M1i",
url = "https://hdl.handle.net/21.15107/rcub_machinery_4034"
}

Radulović, R., Jeremić, B.,& Obradović, A.. (2019). Realization of the brachistohronic motion of a nonholonomic variable mass mechanical system by ideal holonomic constraint. in Proceeding of 7th International Congress of Serbian Society of Mechanics Sremski Karlovci, Serbia, June 24-26, 2019
Srpsko društvo za mehaniku., M1i.
https://hdl.handle.net/21.15107/rcub_machinery_4034

Radulović R, Jeremić B, Obradović A. Realization of the brachistohronic motion of a nonholonomic variable mass mechanical system by ideal holonomic constraint. in Proceeding of 7th International Congress of Serbian Society of Mechanics Sremski Karlovci, Serbia, June 24-26, 2019. 2019;:M1i.
https://hdl.handle.net/21.15107/rcub_machinery_4034 .

Radulović, Radoslav, Jeremić, Bojan, Obradović, Aleksandar, "Realization of the brachistohronic motion of a nonholonomic variable mass mechanical system by ideal holonomic constraint" in Proceeding of 7th International Congress of Serbian Society of Mechanics Sremski Karlovci, Serbia, June 24-26, 2019 (2019):M1i,
https://hdl.handle.net/21.15107/rcub_machinery_4034 .

TY  - CONF
AU  - Jeremić, Bojan
AU  - Radulović, Radoslav
AU  - Obradović, Aleksandar
PY  - 2019
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/4033
AB  - The paper considers realization of the brachistochronic motion of a mechanical system,
composed of free body and variable mass material points, by means of an ideal constraint in the
form of the centrodes. It is assumed that the system performs planar motion in an arbitrary field
of forces and that it has three degrees of freedom. In addition, the laws of the time-rate of mass
variation of the material points, as well as relative velocities of the expelled particles,
respectively, are known. Constraint reactions of the centrodes are expressed in the function of the
generalized forces. Applying Pontryagin's maximum principle and singular optimal control
theory, the problem of brachistochronic motion is solved as a two-point boundary value problem
(TPBVP). The considerations are illustrated via an example, where it is examined how the change
in the initial energy of the system affects the normal reaction of the connection and thus the
coefficient of rolling friction.
PB  - Srpsko društvo za mehaniku
C3  - Proceeding of 7th International Congress of Serbian Society of Mechanics Sremski Karlovci, Serbia, June 24-26, 2019
T1  - Realizing brachistohronic motion of a variable mass body by centrodes
SP  - G3a
UR  - https://hdl.handle.net/21.15107/rcub_machinery_4033
ER  - 

@conference{
author = "Jeremić, Bojan and Radulović, Radoslav and Obradović, Aleksandar",
year = "2019",
abstract = "The paper considers realization of the brachistochronic motion of a mechanical system,
composed of free body and variable mass material points, by means of an ideal constraint in the
form of the centrodes. It is assumed that the system performs planar motion in an arbitrary field
of forces and that it has three degrees of freedom. In addition, the laws of the time-rate of mass
variation of the material points, as well as relative velocities of the expelled particles,
respectively, are known. Constraint reactions of the centrodes are expressed in the function of the
generalized forces. Applying Pontryagin's maximum principle and singular optimal control
theory, the problem of brachistochronic motion is solved as a two-point boundary value problem
(TPBVP). The considerations are illustrated via an example, where it is examined how the change
in the initial energy of the system affects the normal reaction of the connection and thus the
coefficient of rolling friction.",
publisher = "Srpsko društvo za mehaniku",
journal = "Proceeding of 7th International Congress of Serbian Society of Mechanics Sremski Karlovci, Serbia, June 24-26, 2019",
title = "Realizing brachistohronic motion of a variable mass body by centrodes",
pages = "G3a",
url = "https://hdl.handle.net/21.15107/rcub_machinery_4033"
}

Jeremić, B., Radulović, R.,& Obradović, A.. (2019). Realizing brachistohronic motion of a variable mass body by centrodes. in Proceeding of 7th International Congress of Serbian Society of Mechanics Sremski Karlovci, Serbia, June 24-26, 2019
Srpsko društvo za mehaniku., G3a.
https://hdl.handle.net/21.15107/rcub_machinery_4033

Jeremić B, Radulović R, Obradović A. Realizing brachistohronic motion of a variable mass body by centrodes. in Proceeding of 7th International Congress of Serbian Society of Mechanics Sremski Karlovci, Serbia, June 24-26, 2019. 2019;:G3a.
https://hdl.handle.net/21.15107/rcub_machinery_4033 .

Jeremić, Bojan, Radulović, Radoslav, Obradović, Aleksandar, "Realizing brachistohronic motion of a variable mass body by centrodes" in Proceeding of 7th International Congress of Serbian Society of Mechanics Sremski Karlovci, Serbia, June 24-26, 2019 (2019):G3a,
https://hdl.handle.net/21.15107/rcub_machinery_4033 .

TY  - JOUR
AU  - Jeremić, Bojan
AU  - Radulović, Radoslav
AU  - Obradović, Aleksandar
AU  - Šalinić, Slaviša
AU  - Dražić, Milan
PY  - 2019
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/3045
AB  - In this paper, the brachistochronic motion of a mechanical system composed of variable-mass particles is analysed. Workless (ideal) holonomic and linear nonholonomic constraints are imposed on the system. It is assumed that the system moves in an arbitrary field of known potential and nonpotential forces with prescribed both laws of the time-rate of mass variation of the particles and relative velocities of the expelled (or gained) masses. The first time-derivatives of quasi-velocities are taken as control variables. Using Pontryagin's maximum principle and singular optimal control theory, the problem of brachistochronic motion of the nonholonomic variable-mass mechanical system is solved as a two-point boundary value problem. In addition, a discussion about the realization of control forces is given. The results are illustrated via an example.
PB  - Sage Publications Ltd, London
T2  - Mathematics and Mechanics of Solids
T1  - Brachistochronic motion of a nonholonomic variable-mass mechanical system in general force fields
EP  - 298
IS  - 1
SP  - 281
VL  - 24
DO  - 10.1177/1081286517738307
ER  - 

@article{
author = "Jeremić, Bojan and Radulović, Radoslav and Obradović, Aleksandar and Šalinić, Slaviša and Dražić, Milan",
year = "2019",
abstract = "In this paper, the brachistochronic motion of a mechanical system composed of variable-mass particles is analysed. Workless (ideal) holonomic and linear nonholonomic constraints are imposed on the system. It is assumed that the system moves in an arbitrary field of known potential and nonpotential forces with prescribed both laws of the time-rate of mass variation of the particles and relative velocities of the expelled (or gained) masses. The first time-derivatives of quasi-velocities are taken as control variables. Using Pontryagin's maximum principle and singular optimal control theory, the problem of brachistochronic motion of the nonholonomic variable-mass mechanical system is solved as a two-point boundary value problem. In addition, a discussion about the realization of control forces is given. The results are illustrated via an example.",
publisher = "Sage Publications Ltd, London",
journal = "Mathematics and Mechanics of Solids",
title = "Brachistochronic motion of a nonholonomic variable-mass mechanical system in general force fields",
pages = "298-281",
number = "1",
volume = "24",
doi = "10.1177/1081286517738307"
}

Jeremić, B., Radulović, R., Obradović, A., Šalinić, S.,& Dražić, M.. (2019). Brachistochronic motion of a nonholonomic variable-mass mechanical system in general force fields. in Mathematics and Mechanics of Solids
Sage Publications Ltd, London., 24(1), 281-298.
https://doi.org/10.1177/1081286517738307

Jeremić B, Radulović R, Obradović A, Šalinić S, Dražić M. Brachistochronic motion of a nonholonomic variable-mass mechanical system in general force fields. in Mathematics and Mechanics of Solids. 2019;24(1):281-298.
doi:10.1177/1081286517738307 .

Jeremić, Bojan, Radulović, Radoslav, Obradović, Aleksandar, Šalinić, Slaviša, Dražić, Milan, "Brachistochronic motion of a nonholonomic variable-mass mechanical system in general force fields" in Mathematics and Mechanics of Solids, 24, no. 1 (2019):281-298,
https://doi.org/10.1177/1081286517738307 . .

TY  - CONF
AU  - Momčilović, Dejan B.
AU  - Atanasovska, Ivana
AU  - Mitrović, Radivoje
PY  - 2018
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/7505
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_machinery_7505
ER  - 

@conference{
author = "Momčilović, Dejan B. 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_machinery_7505"
}

Momčilović, D. B., 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_machinery_7505

Momčilović DB, 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_machinery_7505 .

Momčilović, Dejan B., 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_machinery_7505 .