TY  - JOUR
AU  - Đorđević, Branislav
AU  - Mastilović, Sreten
AU  - Sedmak, Aleksandar
AU  - Dimić, Aleksandar
AU  - Kljajin, Milan
PY  - 2023
UR  - https://www.sciencedirect.com/science/article/pii/S0013794423006744
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/7107
AB  - The phenomenon of ductile-to-brittle transition in ferritic steels has been a ubiquitous research challenge for the last 50 years. The characterization of this problem using the fracture mechanics concept, from the earliest studies based on the linear-elastic fracture mechanics to the application of the elastic–plastic fracture mechanics, has become inevitable over time. The fracture toughness is not an intrinsic material property but depends on geometrical factors (such as the specimen shape, thickness, and surface roughness), defect type and distribution, loading mode, and environmental conditions. The pronounced scatter of experimental data on fracture toughness, characteristic of all ferritic steels in the ductile-to-brittle transition temperature region, necessitated the use of statistical methods for data processing. That approach, which emerged in the 1970 s, can still be found today as the basis for interpreting fracture toughness data in ductile-to-brittle transition problems. This paper presents a brief historical overview of such studies along with the problems that have arisen as a consequence of using fracture mechanics concepts, such as constraint effects, as an example. In the time-honored research tradition, all the proposed methods and models, as well as their criticisms, provided the basis for the development of new approaches to the ductile-to-brittle characterization of ferritic steels. Specifically, these include size effects and scaling of geometrically similar samples, with the aim of predicting material behavior beyond experimental limits. Brief outlines of two new approaches are provided in this succinct review. The criticisms of all presented methods are oriented mostly on the application domain, as well as their capability to predict fracture toughness, with short overview of their most conspicuous advantages and disadvantages.
T2  - Engineering Fracture Mechanics
T1  - Ductile-to-brittle transition of ferritic steels: A historical sketch and some recent trends
SP  - 109716
VL  - 293
DO  - 10.1016/j.engfracmech.2023.109716
ER  - 

@article{
author = "Đorđević, Branislav and Mastilović, Sreten and Sedmak, Aleksandar and Dimić, Aleksandar and Kljajin, Milan",
year = "2023",
abstract = "The phenomenon of ductile-to-brittle transition in ferritic steels has been a ubiquitous research challenge for the last 50 years. The characterization of this problem using the fracture mechanics concept, from the earliest studies based on the linear-elastic fracture mechanics to the application of the elastic–plastic fracture mechanics, has become inevitable over time. The fracture toughness is not an intrinsic material property but depends on geometrical factors (such as the specimen shape, thickness, and surface roughness), defect type and distribution, loading mode, and environmental conditions. The pronounced scatter of experimental data on fracture toughness, characteristic of all ferritic steels in the ductile-to-brittle transition temperature region, necessitated the use of statistical methods for data processing. That approach, which emerged in the 1970 s, can still be found today as the basis for interpreting fracture toughness data in ductile-to-brittle transition problems. This paper presents a brief historical overview of such studies along with the problems that have arisen as a consequence of using fracture mechanics concepts, such as constraint effects, as an example. In the time-honored research tradition, all the proposed methods and models, as well as their criticisms, provided the basis for the development of new approaches to the ductile-to-brittle characterization of ferritic steels. Specifically, these include size effects and scaling of geometrically similar samples, with the aim of predicting material behavior beyond experimental limits. Brief outlines of two new approaches are provided in this succinct review. The criticisms of all presented methods are oriented mostly on the application domain, as well as their capability to predict fracture toughness, with short overview of their most conspicuous advantages and disadvantages.",
journal = "Engineering Fracture Mechanics",
title = "Ductile-to-brittle transition of ferritic steels: A historical sketch and some recent trends",
pages = "109716",
volume = "293",
doi = "10.1016/j.engfracmech.2023.109716"
}

Đorđević, B., Mastilović, S., Sedmak, A., Dimić, A.,& Kljajin, M.. (2023). Ductile-to-brittle transition of ferritic steels: A historical sketch and some recent trends. in Engineering Fracture Mechanics, 293, 109716.
https://doi.org/10.1016/j.engfracmech.2023.109716

Đorđević B, Mastilović S, Sedmak A, Dimić A, Kljajin M. Ductile-to-brittle transition of ferritic steels: A historical sketch and some recent trends. in Engineering Fracture Mechanics. 2023;293:109716.
doi:10.1016/j.engfracmech.2023.109716 .

Đorđević, Branislav, Mastilović, Sreten, Sedmak, Aleksandar, Dimić, Aleksandar, Kljajin, Milan, "Ductile-to-brittle transition of ferritic steels: A historical sketch and some recent trends" in Engineering Fracture Mechanics, 293 (2023):109716,
https://doi.org/10.1016/j.engfracmech.2023.109716 . .

TY  - JOUR
AU  - Ristivojević, Mileta
AU  - Lučanin, Vojkan
AU  - Dimić, Aleksandar
AU  - Mišković, Žarko
AU  - Burzić, Zijah
AU  - Stamenić, Zoran
AU  - Rackov, Milan
PY  - 2023
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/3960
AB  - For heavy vehicle systems, within the power transmission chain from the driving machine to the working components (wheels), gears have a large share of application in the form of gearboxes, differentials and speed reducers. Their purpose is to achieve the highest possible output torque at the working components. In one heavy-duty truck, the gearbox lost its working capacity due to the failure of its vital parts: a tapered roller bearing and a helical gear. The analysis presented in this paper, conducted on the basis of experimental and analytical methods, showed that, due to inadequate installation of the bearings’ outer ring in the gearbox housing in one intermediate shaft support, the roller bearing performed its elementary function in very unfavorable working conditions of mechanical and thermal nature. Due to the damage accumulation, the roller bearing gradually lost its working capacity. As a result, the intensity of the working conditions of the entire gearbox increased. At the moment when they reached the critical value from the aspect of the gear teeth bending strength, volumetric destruction occurred, i.e fracture of the helical gear tooth, and thus the cessation of gearbox power transmission.
PB  - Elsevier
T2  - Engineering Failure Analysis
T1  - Investigation of the heavy duty truck gear drive failure
IS  - February
SP  - 106995
VL  - 144
DO  - 10.1016/j.engfailanal.2022.106995
ER  - 

@article{
author = "Ristivojević, Mileta and Lučanin, Vojkan and Dimić, Aleksandar and Mišković, Žarko and Burzić, Zijah and Stamenić, Zoran and Rackov, Milan",
year = "2023",
abstract = "For heavy vehicle systems, within the power transmission chain from the driving machine to the working components (wheels), gears have a large share of application in the form of gearboxes, differentials and speed reducers. Their purpose is to achieve the highest possible output torque at the working components. In one heavy-duty truck, the gearbox lost its working capacity due to the failure of its vital parts: a tapered roller bearing and a helical gear. The analysis presented in this paper, conducted on the basis of experimental and analytical methods, showed that, due to inadequate installation of the bearings’ outer ring in the gearbox housing in one intermediate shaft support, the roller bearing performed its elementary function in very unfavorable working conditions of mechanical and thermal nature. Due to the damage accumulation, the roller bearing gradually lost its working capacity. As a result, the intensity of the working conditions of the entire gearbox increased. At the moment when they reached the critical value from the aspect of the gear teeth bending strength, volumetric destruction occurred, i.e fracture of the helical gear tooth, and thus the cessation of gearbox power transmission.",
publisher = "Elsevier",
journal = "Engineering Failure Analysis",
title = "Investigation of the heavy duty truck gear drive failure",
number = "February",
pages = "106995",
volume = "144",
doi = "10.1016/j.engfailanal.2022.106995"
}

Ristivojević, M., Lučanin, V., Dimić, A., Mišković, Ž., Burzić, Z., Stamenić, Z.,& Rackov, M.. (2023). Investigation of the heavy duty truck gear drive failure. in Engineering Failure Analysis
Elsevier., 144(February), 106995.
https://doi.org/10.1016/j.engfailanal.2022.106995

Ristivojević M, Lučanin V, Dimić A, Mišković Ž, Burzić Z, Stamenić Z, Rackov M. Investigation of the heavy duty truck gear drive failure. in Engineering Failure Analysis. 2023;144(February):106995.
doi:10.1016/j.engfailanal.2022.106995 .

Ristivojević, Mileta, Lučanin, Vojkan, Dimić, Aleksandar, Mišković, Žarko, Burzić, Zijah, Stamenić, Zoran, Rackov, Milan, "Investigation of the heavy duty truck gear drive failure" in Engineering Failure Analysis, 144, no. February (2023):106995,
https://doi.org/10.1016/j.engfailanal.2022.106995 . .

TY  - CONF
AU  - Stanković, Miloš
AU  - Mihajlović, Dimitrije
AU  - Kolarević, Nenad
AU  - Dimić, Aleksandar
AU  - Davidović, Nikola
PY  - 2023
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/7640
C3  - 39th Danubia-Adria Symposium on Advances in Experimental Mechanics 26-29 September 2023
T1  - Influence Of The Production Steps Onto The Teeth Geometry Of High Precision Gears
EP  - 33
SP  - 32
UR  - https://hdl.handle.net/21.15107/rcub_machinery_7640
ER  - 

@conference{
author = "Stanković, Miloš and Mihajlović, Dimitrije and Kolarević, Nenad and Dimić, Aleksandar and Davidović, Nikola",
year = "2023",
journal = "39th Danubia-Adria Symposium on Advances in Experimental Mechanics 26-29 September 2023",
title = "Influence Of The Production Steps Onto The Teeth Geometry Of High Precision Gears",
pages = "33-32",
url = "https://hdl.handle.net/21.15107/rcub_machinery_7640"
}

Stanković, M., Mihajlović, D., Kolarević, N., Dimić, A.,& Davidović, N.. (2023). Influence Of The Production Steps Onto The Teeth Geometry Of High Precision Gears. in 39th Danubia-Adria Symposium on Advances in Experimental Mechanics 26-29 September 2023, 32-33.
https://hdl.handle.net/21.15107/rcub_machinery_7640

Stanković M, Mihajlović D, Kolarević N, Dimić A, Davidović N. Influence Of The Production Steps Onto The Teeth Geometry Of High Precision Gears. in 39th Danubia-Adria Symposium on Advances in Experimental Mechanics 26-29 September 2023. 2023;:32-33.
https://hdl.handle.net/21.15107/rcub_machinery_7640 .

Stanković, Miloš, Mihajlović, Dimitrije, Kolarević, Nenad, Dimić, Aleksandar, Davidović, Nikola, "Influence Of The Production Steps Onto The Teeth Geometry Of High Precision Gears" in 39th Danubia-Adria Symposium on Advances in Experimental Mechanics 26-29 September 2023 (2023):32-33,
https://hdl.handle.net/21.15107/rcub_machinery_7640 .

TY  - CONF
AU  - Đorđević, Branislav
AU  - Mastilović, Sreten
AU  - Petrovski, Blagoj
AU  - Sedmak, Aleksandar
AU  - Dimić, Aleksandar
PY  - 2023
UR  - http://cnntechno.com/docs/7_CNN_book_of_abstracts.pdf
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/7095
AB  - In this paper is presented the 1-point method for material behaviour prediction, in terms of fracture toughness, of the ferritic steel EN 1.6310 in the transition temperature regime (-60°C and -90°C). Experiments were carried out at two different temperatures, representing two studies joined in one. Experimental testing was performed according to ASTM 1820 standard. This 1-point method is based on statistical processing (of 2-parameters Weibull statistics) of obtained experimental results, i.e. scattered J-integral values, of C(T) specimens with different geometries. Fixing value of one Weibull parameter and taking into account size-dependence of second one, fracture probabilities in the function of J-integral for large C(T)100 and C(T)200 were determined based on testing of C(T)50 specimen size. This research pointed out the sensitivty of proposed method on statistical sample size. One of the aims of proposed method was reducing the cost and price of laboratory tests in overall by predicting material behaviour and testing smaller C(T) specimen size. This research represents an upgrade of the Landes and Heerens works, and it is dedicated to their efforts in understanding and characterisation of transition temperature regime of ferritic steels.
PB  - University of Belgrade - Faculty of Mechanical Engineering
C3  - International Conference of Experimental and Numerical Investigations and New Technologies (CNN TECH 2023), 04-07 July 2023, Programme and The Book of Abstracts
T1  - A METHOD FOR FRACTURE PROBABILITY ASSESSMENT IN FUNCTION OF J-INTEGRAL IN TRANSITION TEMPERATURE REGIME OF FERRITIC STEEL
SP  - 21
UR  - https://hdl.handle.net/21.15107/rcub_machinery_7095
ER  - 

@conference{
author = "Đorđević, Branislav and Mastilović, Sreten and Petrovski, Blagoj and Sedmak, Aleksandar and Dimić, Aleksandar",
year = "2023",
abstract = "In this paper is presented the 1-point method for material behaviour prediction, in terms of fracture toughness, of the ferritic steel EN 1.6310 in the transition temperature regime (-60°C and -90°C). Experiments were carried out at two different temperatures, representing two studies joined in one. Experimental testing was performed according to ASTM 1820 standard. This 1-point method is based on statistical processing (of 2-parameters Weibull statistics) of obtained experimental results, i.e. scattered J-integral values, of C(T) specimens with different geometries. Fixing value of one Weibull parameter and taking into account size-dependence of second one, fracture probabilities in the function of J-integral for large C(T)100 and C(T)200 were determined based on testing of C(T)50 specimen size. This research pointed out the sensitivty of proposed method on statistical sample size. One of the aims of proposed method was reducing the cost and price of laboratory tests in overall by predicting material behaviour and testing smaller C(T) specimen size. This research represents an upgrade of the Landes and Heerens works, and it is dedicated to their efforts in understanding and characterisation of transition temperature regime of ferritic steels.",
publisher = "University of Belgrade - Faculty of Mechanical Engineering",
journal = "International Conference of Experimental and Numerical Investigations and New Technologies (CNN TECH 2023), 04-07 July 2023, Programme and The Book of Abstracts",
title = "A METHOD FOR FRACTURE PROBABILITY ASSESSMENT IN FUNCTION OF J-INTEGRAL IN TRANSITION TEMPERATURE REGIME OF FERRITIC STEEL",
pages = "21",
url = "https://hdl.handle.net/21.15107/rcub_machinery_7095"
}

Đorđević, B., Mastilović, S., Petrovski, B., Sedmak, A.,& Dimić, A.. (2023). A METHOD FOR FRACTURE PROBABILITY ASSESSMENT IN FUNCTION OF J-INTEGRAL IN TRANSITION TEMPERATURE REGIME OF FERRITIC STEEL. in International Conference of Experimental and Numerical Investigations and New Technologies (CNN TECH 2023), 04-07 July 2023, Programme and The Book of Abstracts
University of Belgrade - Faculty of Mechanical Engineering., 21.
https://hdl.handle.net/21.15107/rcub_machinery_7095

Đorđević B, Mastilović S, Petrovski B, Sedmak A, Dimić A. A METHOD FOR FRACTURE PROBABILITY ASSESSMENT IN FUNCTION OF J-INTEGRAL IN TRANSITION TEMPERATURE REGIME OF FERRITIC STEEL. in International Conference of Experimental and Numerical Investigations and New Technologies (CNN TECH 2023), 04-07 July 2023, Programme and The Book of Abstracts. 2023;:21.
https://hdl.handle.net/21.15107/rcub_machinery_7095 .

Đorđević, Branislav, Mastilović, Sreten, Petrovski, Blagoj, Sedmak, Aleksandar, Dimić, Aleksandar, "A METHOD FOR FRACTURE PROBABILITY ASSESSMENT IN FUNCTION OF J-INTEGRAL IN TRANSITION TEMPERATURE REGIME OF FERRITIC STEEL" in International Conference of Experimental and Numerical Investigations and New Technologies (CNN TECH 2023), 04-07 July 2023, Programme and The Book of Abstracts (2023):21,
https://hdl.handle.net/21.15107/rcub_machinery_7095 .

TY  - CONF
AU  - Đorđević, Branislav
AU  - Mastilović, Sreten
AU  - Sedmak, Aleksandar
AU  - Dimić, Aleksandar
AU  - Sedmak, Simon
AU  - Aranđelović, Mihajlo
PY  - 2023
UR  - https://www.sciencedirect.com/journal/procedia-structural-integrity/vol/47/suppl/C
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/7100
AB  - The large scatter of the experimental fracture toughness data, characteristic of all ferritic steels in the ductile-to-brittle transition temperature region, imposed the need to include statistical methods for data processing. Due to the inherent stochasticity, the application of fracture mechanics concepts in the characterization of the DTB transition phenomenon has remained a challenging task over the past 50 years. Various models were developed based on statistical approach to data processing in order to capture the salient features of the phenomenon, but all of them have certain limitations because of the intrinsic complexity of the problem. However, all these models provided a solid basis for the continued development of new approaches in the characterization of DTB. Such two novel models are compared herein. They include size effects and utilize scaling of geometrically similar C(T) specimens, with the aim of obtaining predictions of the fracture toughness. Both proposed models have the weakest link statistics in common. In the present study, the EURO fracture toughness data set for 22NiMoCr37 reactor steel is used and the experimental data obtained at temperature of -60 °C is selected to demonstrate the accuracy of the estimates. The fracture toughness measure used is the critical value of the stress intensity factor used in the master curve KJc [MPa√m]. The obtained predictions are in good agreement with the experimental results, taking into account the inherent scatter of the experimental data. The estimate of KJc cumulative distribution function obtained by extrapolation using the novel two-step-scaling method is sensitive to the statistical size of the input data sets.
PB  - Elsevier B.V.
C3  - 27th International Conference on Fracture and Structural Integrity (IGF27)
T1  - Comparison of two recent approaches to DTB characterization of ferritic steels
EP  - 596
SP  - 589
VL  - 47
DO  - 10.1016/j.prostr.2023.07.065
ER  - 

@conference{
author = "Đorđević, Branislav and Mastilović, Sreten and Sedmak, Aleksandar and Dimić, Aleksandar and Sedmak, Simon and Aranđelović, Mihajlo",
year = "2023",
abstract = "The large scatter of the experimental fracture toughness data, characteristic of all ferritic steels in the ductile-to-brittle transition temperature region, imposed the need to include statistical methods for data processing. Due to the inherent stochasticity, the application of fracture mechanics concepts in the characterization of the DTB transition phenomenon has remained a challenging task over the past 50 years. Various models were developed based on statistical approach to data processing in order to capture the salient features of the phenomenon, but all of them have certain limitations because of the intrinsic complexity of the problem. However, all these models provided a solid basis for the continued development of new approaches in the characterization of DTB. Such two novel models are compared herein. They include size effects and utilize scaling of geometrically similar C(T) specimens, with the aim of obtaining predictions of the fracture toughness. Both proposed models have the weakest link statistics in common. In the present study, the EURO fracture toughness data set for 22NiMoCr37 reactor steel is used and the experimental data obtained at temperature of -60 °C is selected to demonstrate the accuracy of the estimates. The fracture toughness measure used is the critical value of the stress intensity factor used in the master curve KJc [MPa√m]. The obtained predictions are in good agreement with the experimental results, taking into account the inherent scatter of the experimental data. The estimate of KJc cumulative distribution function obtained by extrapolation using the novel two-step-scaling method is sensitive to the statistical size of the input data sets.",
publisher = "Elsevier B.V.",
journal = "27th International Conference on Fracture and Structural Integrity (IGF27)",
title = "Comparison of two recent approaches to DTB characterization of ferritic steels",
pages = "596-589",
volume = "47",
doi = "10.1016/j.prostr.2023.07.065"
}

Đorđević, B., Mastilović, S., Sedmak, A., Dimić, A., Sedmak, S.,& Aranđelović, M.. (2023). Comparison of two recent approaches to DTB characterization of ferritic steels. in 27th International Conference on Fracture and Structural Integrity (IGF27)
Elsevier B.V.., 47, 589-596.
https://doi.org/10.1016/j.prostr.2023.07.065

Đorđević B, Mastilović S, Sedmak A, Dimić A, Sedmak S, Aranđelović M. Comparison of two recent approaches to DTB characterization of ferritic steels. in 27th International Conference on Fracture and Structural Integrity (IGF27). 2023;47:589-596.
doi:10.1016/j.prostr.2023.07.065 .

Đorđević, Branislav, Mastilović, Sreten, Sedmak, Aleksandar, Dimić, Aleksandar, Sedmak, Simon, Aranđelović, Mihajlo, "Comparison of two recent approaches to DTB characterization of ferritic steels" in 27th International Conference on Fracture and Structural Integrity (IGF27), 47 (2023):589-596,
https://doi.org/10.1016/j.prostr.2023.07.065 . .

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

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

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

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

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

TY  - JOUR
AU  - Dimić, Aleksandar
AU  - Vencl, Aleksandar
AU  - Ristivojević, Mileta
AU  - Mitrović, Radivoje
AU  - Mišković, Žarko
AU  - Milivojević, Aleksandar
PY  - 2022
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/3749
AB  - The influence of the running-in process operating parameters on tribological properties of the block-on-disc samples in lubricated sliding conditions is analyzed and discussed in detail. Different running-in regimes are achieved by varying the normal load and sliding speed. After the running-in period, during which the operating parameters are varied, all samples are placed in a working regime under the same set of operating conditions. At the end of the running-in period, as well as at the end of the working period, an analysis of the changes in the surface roughness, microhardness, wear rate, and coefficient of friction is performed. Less desirable properties in terms of wear rate and steady-state coefficient of friction are noticed for the samples that were run-in with the operating conditions which were the same as the working regime operating conditions. In the defined test conditions, it is shown that the intensity of normal load applied during the running-in process has a dominant influence on the amount of wear and coefficient of friction value. It was also shown that the running-in process can significantly improve the roughness of the initially rough contact surfaces. The results of experimental testing indicate that the variation of the operating parameters during the running-in process can be used to improve the working ability of the sliding contact surfaces under the mixed lubrication regime.
PB  - Sage Publications Ltd, London
T2  - Proceedings of The Institution of Mechanical Engineers Part J-Journal of Engineering Tribology
T1  - Influence of the running-in process on the working ability of contact surfaces in lubricated sliding conditions
EP  - 700
IS  - 4
SP  - 691
VL  - 236
DO  - 10.1177/13506501211027711
ER  - 

@article{
author = "Dimić, Aleksandar and Vencl, Aleksandar and Ristivojević, Mileta and Mitrović, Radivoje and Mišković, Žarko and Milivojević, Aleksandar",
year = "2022",
abstract = "The influence of the running-in process operating parameters on tribological properties of the block-on-disc samples in lubricated sliding conditions is analyzed and discussed in detail. Different running-in regimes are achieved by varying the normal load and sliding speed. After the running-in period, during which the operating parameters are varied, all samples are placed in a working regime under the same set of operating conditions. At the end of the running-in period, as well as at the end of the working period, an analysis of the changes in the surface roughness, microhardness, wear rate, and coefficient of friction is performed. Less desirable properties in terms of wear rate and steady-state coefficient of friction are noticed for the samples that were run-in with the operating conditions which were the same as the working regime operating conditions. In the defined test conditions, it is shown that the intensity of normal load applied during the running-in process has a dominant influence on the amount of wear and coefficient of friction value. It was also shown that the running-in process can significantly improve the roughness of the initially rough contact surfaces. The results of experimental testing indicate that the variation of the operating parameters during the running-in process can be used to improve the working ability of the sliding contact surfaces under the mixed lubrication regime.",
publisher = "Sage Publications Ltd, London",
journal = "Proceedings of The Institution of Mechanical Engineers Part J-Journal of Engineering Tribology",
title = "Influence of the running-in process on the working ability of contact surfaces in lubricated sliding conditions",
pages = "700-691",
number = "4",
volume = "236",
doi = "10.1177/13506501211027711"
}

Dimić, A., Vencl, A., Ristivojević, M., Mitrović, R., Mišković, Ž.,& Milivojević, A.. (2022). Influence of the running-in process on the working ability of contact surfaces in lubricated sliding conditions. in Proceedings of The Institution of Mechanical Engineers Part J-Journal of Engineering Tribology
Sage Publications Ltd, London., 236(4), 691-700.
https://doi.org/10.1177/13506501211027711

Dimić A, Vencl A, Ristivojević M, Mitrović R, Mišković Ž, Milivojević A. Influence of the running-in process on the working ability of contact surfaces in lubricated sliding conditions. in Proceedings of The Institution of Mechanical Engineers Part J-Journal of Engineering Tribology. 2022;236(4):691-700.
doi:10.1177/13506501211027711 .

Dimić, Aleksandar, Vencl, Aleksandar, Ristivojević, Mileta, Mitrović, Radivoje, Mišković, Žarko, Milivojević, Aleksandar, "Influence of the running-in process on the working ability of contact surfaces in lubricated sliding conditions" in Proceedings of The Institution of Mechanical Engineers Part J-Journal of Engineering Tribology, 236, no. 4 (2022):691-700,
https://doi.org/10.1177/13506501211027711 . .

TY  - JOUR
AU  - Đorđević, Branislav R.
AU  - Sedmak, Aleksandar
AU  - Petrovski, Blagoj
AU  - Dimić, Aleksandar
PY  - 2021
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/3593
AB  - This paper presents the results and methods used for determining of probability of cleavage fracture toughness of ferritic reactor steel in transition temperature area. The steel tested in this study is steel know as 20MnMoNi 55 by DIN standard, typically used for structures working at low temperatures. In addition, the effect of test specimen geometry, temperature and fatigue crack initiation rate on fracture toughness was investigated in order to predict the fracture behaviour and probability of cleavage fracture. Two main studies joined in on one are presented in this paper. Testing in both studies were performed according to ASTM 1820 standard and the Weibull distribution with regression analysis, which includes fitting the experimental results in a logarithmic coordinate system, was used to predict the Jc values. Cleavage fracture probabilities in the function of Jc for large test specimen, C(T)100 and C(T)200 were determined based on the results obtained by testing of small C(T)50 specimens, for the purpose of direct savings and decreased costs of specimen testing. Cleavage fracture probability, represented by using Weibull distribution of experimental data will provide a clear insight into material behaviour at different temperatures. The influence of Delta K values during fatigue pre-cracking procedure on the fracture toughness scatter was also presented and discussed.
PB  - Pergamon-Elsevier Science Ltd, Oxford
T2  - Engineering Failure Analysis
T1  - Probability distribution on cleavage fracture in function of Jc for reactor ferritic steel in transition temperature region
VL  - 125
DO  - 10.1016/j.engfailanal.2021.105392
ER  - 

@article{
author = "Đorđević, Branislav R. and Sedmak, Aleksandar and Petrovski, Blagoj and Dimić, Aleksandar",
year = "2021",
abstract = "This paper presents the results and methods used for determining of probability of cleavage fracture toughness of ferritic reactor steel in transition temperature area. The steel tested in this study is steel know as 20MnMoNi 55 by DIN standard, typically used for structures working at low temperatures. In addition, the effect of test specimen geometry, temperature and fatigue crack initiation rate on fracture toughness was investigated in order to predict the fracture behaviour and probability of cleavage fracture. Two main studies joined in on one are presented in this paper. Testing in both studies were performed according to ASTM 1820 standard and the Weibull distribution with regression analysis, which includes fitting the experimental results in a logarithmic coordinate system, was used to predict the Jc values. Cleavage fracture probabilities in the function of Jc for large test specimen, C(T)100 and C(T)200 were determined based on the results obtained by testing of small C(T)50 specimens, for the purpose of direct savings and decreased costs of specimen testing. Cleavage fracture probability, represented by using Weibull distribution of experimental data will provide a clear insight into material behaviour at different temperatures. The influence of Delta K values during fatigue pre-cracking procedure on the fracture toughness scatter was also presented and discussed.",
publisher = "Pergamon-Elsevier Science Ltd, Oxford",
journal = "Engineering Failure Analysis",
title = "Probability distribution on cleavage fracture in function of Jc for reactor ferritic steel in transition temperature region",
volume = "125",
doi = "10.1016/j.engfailanal.2021.105392"
}

Đorđević, B. R., Sedmak, A., Petrovski, B.,& Dimić, A.. (2021). Probability distribution on cleavage fracture in function of Jc for reactor ferritic steel in transition temperature region. in Engineering Failure Analysis
Pergamon-Elsevier Science Ltd, Oxford., 125.
https://doi.org/10.1016/j.engfailanal.2021.105392

Đorđević BR, Sedmak A, Petrovski B, Dimić A. Probability distribution on cleavage fracture in function of Jc for reactor ferritic steel in transition temperature region. in Engineering Failure Analysis. 2021;125.
doi:10.1016/j.engfailanal.2021.105392 .

Đorđević, Branislav R., Sedmak, Aleksandar, Petrovski, Blagoj, Dimić, Aleksandar, "Probability distribution on cleavage fracture in function of Jc for reactor ferritic steel in transition temperature region" in Engineering Failure Analysis, 125 (2021),
https://doi.org/10.1016/j.engfailanal.2021.105392 . .

TY  - JOUR
AU  - Dimić, Aleksandar
AU  - Ristivojević, Mileta
AU  - Rosić, Božidar
PY  - 2021
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/3606
AB  - The load distribution of simultaneously meshed gear teeth pairs has a significant influence in determining the relevant stress for the working capacity calculation of cylindrical gear pairs with respect to surface and volume strength. According to conventional calculation procedures, the influence of the boundary-ideally uniform load distribution, when all simultaneously meshed teeth pairs are equally engaged in the load transfer, on the teeth flanks stress state is taken into account by approximate expressions for contact ratio factor Z epsilon. In addition, this factor is not defined, no assumptions were given on the basis of which approximate expressions were determined, and no procedure for determining these expressions was disclosed. This paper defines a factor on the basis of which an analysis of the boundary-ideally uniform load distribution can be carried out. By observing the contact lines in the meshing area, when one and two or two and three meshed gear teeth pairs are alternating during the meshing period, a set of analytical expressions is developed to describe the boundary-ideally uniform load distribution of simultaneously meshed gear teeth pairs. Based on the developed analytical expressions, the limiting values of the gear teeth flank stresses can be determined more precisely and the degree of accuracy of the approximate expressions for the contact ratio factor which are given in conventional calculation procedures can be tested. The analysis carried out in this paper can be used for more accurate considerations of all cylindrical gear pairs occurrences which depend on load distribution, such as: load capacity, mesh stiffness, vibration, noise, energy efficiency, etc.
PB  - Springer Heidelberg, Heidelberg
T2  - Journal of The Brazilian Society of Mechanical Sciences and Engineering
T1  - Boundary load distribution of simultaneously meshed gear teeth pairs
IS  - 3
VL  - 43
DO  - 10.1007/s40430-021-02886-w
ER  - 

@article{
author = "Dimić, Aleksandar and Ristivojević, Mileta and Rosić, Božidar",
year = "2021",
abstract = "The load distribution of simultaneously meshed gear teeth pairs has a significant influence in determining the relevant stress for the working capacity calculation of cylindrical gear pairs with respect to surface and volume strength. According to conventional calculation procedures, the influence of the boundary-ideally uniform load distribution, when all simultaneously meshed teeth pairs are equally engaged in the load transfer, on the teeth flanks stress state is taken into account by approximate expressions for contact ratio factor Z epsilon. In addition, this factor is not defined, no assumptions were given on the basis of which approximate expressions were determined, and no procedure for determining these expressions was disclosed. This paper defines a factor on the basis of which an analysis of the boundary-ideally uniform load distribution can be carried out. By observing the contact lines in the meshing area, when one and two or two and three meshed gear teeth pairs are alternating during the meshing period, a set of analytical expressions is developed to describe the boundary-ideally uniform load distribution of simultaneously meshed gear teeth pairs. Based on the developed analytical expressions, the limiting values of the gear teeth flank stresses can be determined more precisely and the degree of accuracy of the approximate expressions for the contact ratio factor which are given in conventional calculation procedures can be tested. The analysis carried out in this paper can be used for more accurate considerations of all cylindrical gear pairs occurrences which depend on load distribution, such as: load capacity, mesh stiffness, vibration, noise, energy efficiency, etc.",
publisher = "Springer Heidelberg, Heidelberg",
journal = "Journal of The Brazilian Society of Mechanical Sciences and Engineering",
title = "Boundary load distribution of simultaneously meshed gear teeth pairs",
number = "3",
volume = "43",
doi = "10.1007/s40430-021-02886-w"
}

Dimić, A., Ristivojević, M.,& Rosić, B.. (2021). Boundary load distribution of simultaneously meshed gear teeth pairs. in Journal of The Brazilian Society of Mechanical Sciences and Engineering
Springer Heidelberg, Heidelberg., 43(3).
https://doi.org/10.1007/s40430-021-02886-w

Dimić A, Ristivojević M, Rosić B. Boundary load distribution of simultaneously meshed gear teeth pairs. in Journal of The Brazilian Society of Mechanical Sciences and Engineering. 2021;43(3).
doi:10.1007/s40430-021-02886-w .

Dimić, Aleksandar, Ristivojević, Mileta, Rosić, Božidar, "Boundary load distribution of simultaneously meshed gear teeth pairs" in Journal of The Brazilian Society of Mechanical Sciences and Engineering, 43, no. 3 (2021),
https://doi.org/10.1007/s40430-021-02886-w . .

TY  - CONF
AU  - Đorđević, Branislav R.
AU  - Sedmak, Aleksandar
AU  - Petrovski, Blagoj
AU  - Dimić, Aleksandar
PY  - 2020
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/3259
AB  - This paper presents the results and methods used for determining of fracture toughness of reactor steel, denoted as 20MnMoNi55, typically used for structures working at low temperatures, in transition temperature area. In addition, the effect of test specimen geometry and temperature on fracture toughness was investigated in order to predict the fracture behavior and probability of failure. Failure probabilities (i.e. cleavage fracture) in the function of J(c) for large test specimens, CT100 and CT200 were determined based on the results obtained by testing of small CT50 specimens, for the purpose of direct savings and decreased costs of specimen testing. Failure probability, represented using Weibull distribution of experimental data, will provide a clear insight into material behavior at different temperatures. Other factors affecting the obtained test results will also be discussed.
PB  - Elsevier, Amsterdam
C3  - Procedia Structural Integrity - 1st Virtual European Conference on Fracture - Vecf1
T1  - Weibull probability distribution for reactor steel 20MnMoNi55 cleavage fracture in transition temperature
EP  - 300
SP  - 295
VL  - 28
DO  - 10.1016/j.prostr.2020.10.035
ER  - 

@conference{
author = "Đorđević, Branislav R. and Sedmak, Aleksandar and Petrovski, Blagoj and Dimić, Aleksandar",
year = "2020",
abstract = "This paper presents the results and methods used for determining of fracture toughness of reactor steel, denoted as 20MnMoNi55, typically used for structures working at low temperatures, in transition temperature area. In addition, the effect of test specimen geometry and temperature on fracture toughness was investigated in order to predict the fracture behavior and probability of failure. Failure probabilities (i.e. cleavage fracture) in the function of J(c) for large test specimens, CT100 and CT200 were determined based on the results obtained by testing of small CT50 specimens, for the purpose of direct savings and decreased costs of specimen testing. Failure probability, represented using Weibull distribution of experimental data, will provide a clear insight into material behavior at different temperatures. Other factors affecting the obtained test results will also be discussed.",
publisher = "Elsevier, Amsterdam",
journal = "Procedia Structural Integrity - 1st Virtual European Conference on Fracture - Vecf1",
title = "Weibull probability distribution for reactor steel 20MnMoNi55 cleavage fracture in transition temperature",
pages = "300-295",
volume = "28",
doi = "10.1016/j.prostr.2020.10.035"
}

Đorđević, B. R., Sedmak, A., Petrovski, B.,& Dimić, A.. (2020). Weibull probability distribution for reactor steel 20MnMoNi55 cleavage fracture in transition temperature. in Procedia Structural Integrity - 1st Virtual European Conference on Fracture - Vecf1
Elsevier, Amsterdam., 28, 295-300.
https://doi.org/10.1016/j.prostr.2020.10.035

Đorđević BR, Sedmak A, Petrovski B, Dimić A. Weibull probability distribution for reactor steel 20MnMoNi55 cleavage fracture in transition temperature. in Procedia Structural Integrity - 1st Virtual European Conference on Fracture - Vecf1. 2020;28:295-300.
doi:10.1016/j.prostr.2020.10.035 .

Đorđević, Branislav R., Sedmak, Aleksandar, Petrovski, Blagoj, Dimić, Aleksandar, "Weibull probability distribution for reactor steel 20MnMoNi55 cleavage fracture in transition temperature" in Procedia Structural Integrity - 1st Virtual European Conference on Fracture - Vecf1, 28 (2020):295-300,
https://doi.org/10.1016/j.prostr.2020.10.035 . .

TY  - CONF
AU  - Mitrović, Radivoje
AU  - Mišković, Žarko
AU  - Stamenić, Zoran
AU  - Soldat, Nataša D.
AU  - Matić, N.S.
AU  - Ristivojević, Mileta
AU  - Dimić, Aleksandar
PY  - 2019
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/3184
AB  - The efficiency of thermal power plants significantly depends on the efficiency of belt conveyor systems. Conveyor idlers, as key parts of belt conveyors, are often the main cause of bulk material transportation systems failures. Testing the operational characteristics of conveyor idlers in laboratory and exploitation conditions is a prerequisite for any progress in the field of increasing energy efficiency of conveyor systems. This paper describes an analysis and discussion of testing results for different types of conveyor idlers, in terms of their performances under the act of predefined radial load. Tests were conducted on a new conveyor idler's testing machine developed at the University of Belgrade-Faculty of Mechanical Engineering. The presented tests are performed in order to determine the quality of carrying and return conveyor idlers. The obtained results will help in solving the key problems in the critical areas of conveyor systems and will increase their energy efficiency. Finally, the expected results can potentially reduce the financial and energy losses which conveyor idlers cause in belt conveyor systems, as well as in the whole system of thermal power plants.
PB  - Institute of Physics Publishing
C3  - IOP Conference Series: Materials Science and Engineering
T1  - Experimental investigation of conveyor idlers operational characteristics
IS  - 1
VL  - 659
DO  - 10.1088/1757-899X/659/1/012067
ER  - 

@conference{
author = "Mitrović, Radivoje and Mišković, Žarko and Stamenić, Zoran and Soldat, Nataša D. and Matić, N.S. and Ristivojević, Mileta and Dimić, Aleksandar",
year = "2019",
abstract = "The efficiency of thermal power plants significantly depends on the efficiency of belt conveyor systems. Conveyor idlers, as key parts of belt conveyors, are often the main cause of bulk material transportation systems failures. Testing the operational characteristics of conveyor idlers in laboratory and exploitation conditions is a prerequisite for any progress in the field of increasing energy efficiency of conveyor systems. This paper describes an analysis and discussion of testing results for different types of conveyor idlers, in terms of their performances under the act of predefined radial load. Tests were conducted on a new conveyor idler's testing machine developed at the University of Belgrade-Faculty of Mechanical Engineering. The presented tests are performed in order to determine the quality of carrying and return conveyor idlers. The obtained results will help in solving the key problems in the critical areas of conveyor systems and will increase their energy efficiency. Finally, the expected results can potentially reduce the financial and energy losses which conveyor idlers cause in belt conveyor systems, as well as in the whole system of thermal power plants.",
publisher = "Institute of Physics Publishing",
journal = "IOP Conference Series: Materials Science and Engineering",
title = "Experimental investigation of conveyor idlers operational characteristics",
number = "1",
volume = "659",
doi = "10.1088/1757-899X/659/1/012067"
}

Mitrović, R., Mišković, Ž., Stamenić, Z., Soldat, N. D., Matić, N.S., Ristivojević, M.,& Dimić, A.. (2019). Experimental investigation of conveyor idlers operational characteristics. in IOP Conference Series: Materials Science and Engineering
Institute of Physics Publishing., 659(1).
https://doi.org/10.1088/1757-899X/659/1/012067

Mitrović R, Mišković Ž, Stamenić Z, Soldat ND, Matić N, Ristivojević M, Dimić A. Experimental investigation of conveyor idlers operational characteristics. in IOP Conference Series: Materials Science and Engineering. 2019;659(1).
doi:10.1088/1757-899X/659/1/012067 .

Mitrović, Radivoje, Mišković, Žarko, Stamenić, Zoran, Soldat, Nataša D., Matić, N.S., Ristivojević, Mileta, Dimić, Aleksandar, "Experimental investigation of conveyor idlers operational characteristics" in IOP Conference Series: Materials Science and Engineering, 659, no. 1 (2019),
https://doi.org/10.1088/1757-899X/659/1/012067 . .

TY  - JOUR
AU  - Ristivojević, Mileta
AU  - Mitrović, Radivoje
AU  - Rosić, Božidar
AU  - Dimić, Aleksandar
AU  - Mišković, Žarko
AU  - Stamenić, Zoran
AU  - Sedak, Miloš
PY  - 2018
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/2760
AB  - Application of typization in the process of designing mechanical sub-assemblies and assemblies is one of the ways to reduce the cost of production. Therefore, nowadays, not only roller bearings, bolts, wedges, etc. are produced as standard machine elements but, by the usage of typization, a production of a large series of typified subassemblies and assemblies, such as electric motors, pumps, power transmissions, etc., is increasing. Increased application of typified parts, sub-assemblies and assemblies in mechanical systems requires an increase in their safety and reliability during operation. Accordingly, in this paper, the load capacity of the typified machine parts series from the aspect of their structural strength is analyzed. It has been shown that there is a scattering of calculated results of the safety factor of members of the typified series from the aspect of the structural strength. The paper presents a proposal for a calculation methodology by which the mentioned scattering of the results of load capacity of typified machine parts series can be significantly reduced.
PB  - Univerzitet u Novom Sadu - Fakultet tehničkih nauka, Novi Sad
T2  - Machine Design
T1  - Typified machine parts series load capacity analysis from aspect of structural strength
EP  - 36
IS  - 2
SP  - 31
VL  - 10
DO  - 10.24867/MD.10.2018.2.31-36
ER  - 

@article{
author = "Ristivojević, Mileta and Mitrović, Radivoje and Rosić, Božidar and Dimić, Aleksandar and Mišković, Žarko and Stamenić, Zoran and Sedak, Miloš",
year = "2018",
abstract = "Application of typization in the process of designing mechanical sub-assemblies and assemblies is one of the ways to reduce the cost of production. Therefore, nowadays, not only roller bearings, bolts, wedges, etc. are produced as standard machine elements but, by the usage of typization, a production of a large series of typified subassemblies and assemblies, such as electric motors, pumps, power transmissions, etc., is increasing. Increased application of typified parts, sub-assemblies and assemblies in mechanical systems requires an increase in their safety and reliability during operation. Accordingly, in this paper, the load capacity of the typified machine parts series from the aspect of their structural strength is analyzed. It has been shown that there is a scattering of calculated results of the safety factor of members of the typified series from the aspect of the structural strength. The paper presents a proposal for a calculation methodology by which the mentioned scattering of the results of load capacity of typified machine parts series can be significantly reduced.",
publisher = "Univerzitet u Novom Sadu - Fakultet tehničkih nauka, Novi Sad",
journal = "Machine Design",
title = "Typified machine parts series load capacity analysis from aspect of structural strength",
pages = "36-31",
number = "2",
volume = "10",
doi = "10.24867/MD.10.2018.2.31-36"
}

Ristivojević, M., Mitrović, R., Rosić, B., Dimić, A., Mišković, Ž., Stamenić, Z.,& Sedak, M.. (2018). Typified machine parts series load capacity analysis from aspect of structural strength. in Machine Design
Univerzitet u Novom Sadu - Fakultet tehničkih nauka, Novi Sad., 10(2), 31-36.
https://doi.org/10.24867/MD.10.2018.2.31-36

Ristivojević M, Mitrović R, Rosić B, Dimić A, Mišković Ž, Stamenić Z, Sedak M. Typified machine parts series load capacity analysis from aspect of structural strength. in Machine Design. 2018;10(2):31-36.
doi:10.24867/MD.10.2018.2.31-36 .

Ristivojević, Mileta, Mitrović, Radivoje, Rosić, Božidar, Dimić, Aleksandar, Mišković, Žarko, Stamenić, Zoran, Sedak, Miloš, "Typified machine parts series load capacity analysis from aspect of structural strength" in Machine Design, 10, no. 2 (2018):31-36,
https://doi.org/10.24867/MD.10.2018.2.31-36 . .

TY  - JOUR
AU  - Sedak, Miloš
AU  - Rosić, Božidar
AU  - Ristivojević, Mileta
AU  - Mitrović, Radivoje
AU  - Dimić, Aleksandar
AU  - Mišković, Žarko
PY  - 2018
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/2764
AB  - By kinematic combinations of toothed pairs with external and internal contacts, we can obtain planetary gears with a considerably improved performance than the corresponding ones with fixed axes, as well as planetary gears with notably poor performance regarding the efficiency. In regard to that, the reference literature and papers almost regularly emphasize that planetary gears, under the same technical conditions, have a smaller mass and a higher degree of efficiency than the ones with fixed axes. The main aim of this paper is to examine the above statement and to determine the scope of the gear ratios in which the planetary gears are more suitable than the fixed axes gears.
PB  - Univerzitet u Novom Sadu - Fakultet tehničkih nauka, Novi Sad
T2  - Machine Design
T1  - Efficiency analysis of planetary gears
EP  - 142
IS  - 4
SP  - 139
VL  - 10
DO  - 10.24867/MD.10.2018.4.139-142
ER  - 

@article{
author = "Sedak, Miloš and Rosić, Božidar and Ristivojević, Mileta and Mitrović, Radivoje and Dimić, Aleksandar and Mišković, Žarko",
year = "2018",
abstract = "By kinematic combinations of toothed pairs with external and internal contacts, we can obtain planetary gears with a considerably improved performance than the corresponding ones with fixed axes, as well as planetary gears with notably poor performance regarding the efficiency. In regard to that, the reference literature and papers almost regularly emphasize that planetary gears, under the same technical conditions, have a smaller mass and a higher degree of efficiency than the ones with fixed axes. The main aim of this paper is to examine the above statement and to determine the scope of the gear ratios in which the planetary gears are more suitable than the fixed axes gears.",
publisher = "Univerzitet u Novom Sadu - Fakultet tehničkih nauka, Novi Sad",
journal = "Machine Design",
title = "Efficiency analysis of planetary gears",
pages = "142-139",
number = "4",
volume = "10",
doi = "10.24867/MD.10.2018.4.139-142"
}

Sedak, M., Rosić, B., Ristivojević, M., Mitrović, R., Dimić, A.,& Mišković, Ž.. (2018). Efficiency analysis of planetary gears. in Machine Design
Univerzitet u Novom Sadu - Fakultet tehničkih nauka, Novi Sad., 10(4), 139-142.
https://doi.org/10.24867/MD.10.2018.4.139-142

Sedak M, Rosić B, Ristivojević M, Mitrović R, Dimić A, Mišković Ž. Efficiency analysis of planetary gears. in Machine Design. 2018;10(4):139-142.
doi:10.24867/MD.10.2018.4.139-142 .

Sedak, Miloš, Rosić, Božidar, Ristivojević, Mileta, Mitrović, Radivoje, Dimić, Aleksandar, Mišković, Žarko, "Efficiency analysis of planetary gears" in Machine Design, 10, no. 4 (2018):139-142,
https://doi.org/10.24867/MD.10.2018.4.139-142 . .

TY  - JOUR
AU  - Mišković, Žarko
AU  - Mitrović, Radivoje
AU  - Stamenić, Zoran
AU  - Dimić, Aleksandar
AU  - Danko, Jan
AU  - Bucha, Jozef
AU  - Milesich, Tomas
PY  - 2018
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/2759
AB  - A study of the influence of extruded material type and layer thickness on the surface roughness and the geometry accuracy on a 3D printed gear tooth profile is presented in this paper. A whole set of samples with the same geometric characteristics is printed from two types of materials (PLA and ABS plastic) and with different layer thickness: 0.1; 0.2; and 0.3 mm. The results of roughness testing and uniformity of the layer thickness are presented in this paper. By comparing the results of samples testing from PLA and ABS plastics with the same 3D printing parameters, a certain conclusions are presented at the end of the paper.
PB  - Univerzitet u Novom Sadu - Fakultet tehničkih nauka, Novi Sad
T2  - Machine Design
T1  - Comparison of 3D Printed Gear's Geometrical Characteristics
EP  - 6
IS  - 1
SP  - 1
VL  - 10
DO  - 10.24867/MD.10.2018.1.1-6
ER  - 

@article{
author = "Mišković, Žarko and Mitrović, Radivoje and Stamenić, Zoran and Dimić, Aleksandar and Danko, Jan and Bucha, Jozef and Milesich, Tomas",
year = "2018",
abstract = "A study of the influence of extruded material type and layer thickness on the surface roughness and the geometry accuracy on a 3D printed gear tooth profile is presented in this paper. A whole set of samples with the same geometric characteristics is printed from two types of materials (PLA and ABS plastic) and with different layer thickness: 0.1; 0.2; and 0.3 mm. The results of roughness testing and uniformity of the layer thickness are presented in this paper. By comparing the results of samples testing from PLA and ABS plastics with the same 3D printing parameters, a certain conclusions are presented at the end of the paper.",
publisher = "Univerzitet u Novom Sadu - Fakultet tehničkih nauka, Novi Sad",
journal = "Machine Design",
title = "Comparison of 3D Printed Gear's Geometrical Characteristics",
pages = "6-1",
number = "1",
volume = "10",
doi = "10.24867/MD.10.2018.1.1-6"
}

Mišković, Ž., Mitrović, R., Stamenić, Z., Dimić, A., Danko, J., Bucha, J.,& Milesich, T.. (2018). Comparison of 3D Printed Gear's Geometrical Characteristics. in Machine Design
Univerzitet u Novom Sadu - Fakultet tehničkih nauka, Novi Sad., 10(1), 1-6.
https://doi.org/10.24867/MD.10.2018.1.1-6

Mišković Ž, Mitrović R, Stamenić Z, Dimić A, Danko J, Bucha J, Milesich T. Comparison of 3D Printed Gear's Geometrical Characteristics. in Machine Design. 2018;10(1):1-6.
doi:10.24867/MD.10.2018.1.1-6 .

Mišković, Žarko, Mitrović, Radivoje, Stamenić, Zoran, Dimić, Aleksandar, Danko, Jan, Bucha, Jozef, Milesich, Tomas, "Comparison of 3D Printed Gear's Geometrical Characteristics" in Machine Design, 10, no. 1 (2018):1-6,
https://doi.org/10.24867/MD.10.2018.1.1-6 . .

TY  - CONF
AU  - Mitrović, Radivoje
AU  - Mišković, Žarko
AU  - Ristivojević, Mileta
AU  - Dimić, Aleksandar
AU  - Danko, Jan
AU  - Bucha, Jozef
AU  - Rackov, M.
PY  - 2018
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/2975
AB  - Nowadays, rapid prototyping technologies are available at very affordable prices. This is the main reason why they are being used in almost all industry sectors. 3D printers are currently being widely used for rapid prototyping and development of the new products. However, taking into account the permanent progress of rapid prototyping materials mechanical characteristics (usually different kinds of plastics), 3D printers are sometimes used even for production of the failed parts replacements - operating at the low load and rotational speed conditions. This is the main goal of this paper - to establish optimal 3D printing parameters (printing direction, layer height and percent of infill) which will allow printed gears to replace failed steel gears, for at least some time, enough for spare steel gears to be produced and delivered on site. Taking into account previously mentioned facts, the application of the 3D printed gears can potentially provide the reduction of maintenance delays in different industrial facilities (factories, workshops, etc.) which will consequently lead to significant energy and financial savings.
PB  - Institute of Physics Publishing
C3  - IOP Conference Series: Materials Science and Engineering
T1  - Determination of optimal parameters for rapid prototyping of the involute gears
IS  - 1
VL  - 393
DO  - 10.1088/1757-899X/393/1/012105
ER  - 

@conference{
author = "Mitrović, Radivoje and Mišković, Žarko and Ristivojević, Mileta and Dimić, Aleksandar and Danko, Jan and Bucha, Jozef and Rackov, M.",
year = "2018",
abstract = "Nowadays, rapid prototyping technologies are available at very affordable prices. This is the main reason why they are being used in almost all industry sectors. 3D printers are currently being widely used for rapid prototyping and development of the new products. However, taking into account the permanent progress of rapid prototyping materials mechanical characteristics (usually different kinds of plastics), 3D printers are sometimes used even for production of the failed parts replacements - operating at the low load and rotational speed conditions. This is the main goal of this paper - to establish optimal 3D printing parameters (printing direction, layer height and percent of infill) which will allow printed gears to replace failed steel gears, for at least some time, enough for spare steel gears to be produced and delivered on site. Taking into account previously mentioned facts, the application of the 3D printed gears can potentially provide the reduction of maintenance delays in different industrial facilities (factories, workshops, etc.) which will consequently lead to significant energy and financial savings.",
publisher = "Institute of Physics Publishing",
journal = "IOP Conference Series: Materials Science and Engineering",
title = "Determination of optimal parameters for rapid prototyping of the involute gears",
number = "1",
volume = "393",
doi = "10.1088/1757-899X/393/1/012105"
}

Mitrović, R., Mišković, Ž., Ristivojević, M., Dimić, A., Danko, J., Bucha, J.,& Rackov, M.. (2018). Determination of optimal parameters for rapid prototyping of the involute gears. in IOP Conference Series: Materials Science and Engineering
Institute of Physics Publishing., 393(1).
https://doi.org/10.1088/1757-899X/393/1/012105

Mitrović R, Mišković Ž, Ristivojević M, Dimić A, Danko J, Bucha J, Rackov M. Determination of optimal parameters for rapid prototyping of the involute gears. in IOP Conference Series: Materials Science and Engineering. 2018;393(1).
doi:10.1088/1757-899X/393/1/012105 .

Mitrović, Radivoje, Mišković, Žarko, Ristivojević, Mileta, Dimić, Aleksandar, Danko, Jan, Bucha, Jozef, Rackov, M., "Determination of optimal parameters for rapid prototyping of the involute gears" in IOP Conference Series: Materials Science and Engineering, 393, no. 1 (2018),
https://doi.org/10.1088/1757-899X/393/1/012105 . .

TY  - CONF
AU  - Mitrović, Radivoje
AU  - Mišković, Žarko
AU  - Ristivojević, Mileta
AU  - Dimić, Aleksandar
AU  - Danko, Jan
AU  - Bucha, Jozef
AU  - Milesich, Tomas
PY  - 2018
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/2835
AB  - In the strides of the most advanced technological achievements, the use of polymers is becoming increasingly evident both in everyday life and in engineering practice. Complex structures made of polymers attract more attention from scientists and researchers, as their application increases in the most diverse fields of science. This phenomenon requires constant improvement of knowledge and technologies for the production of polymeric structures and parts, but it is equally important to establish reliable databases on the behavior of newly-introduced materials under different load conditions. This work is based on the establishment of statistical correlation between parameters of 3D printed models and their mechanical characteristics in conditions of static axial loading.
PB  - Elsevier Science Bv, Amsterdam
C3  - Procedia Structural Integrity - ECF22 - Loading and environmental effects on structural integrity
T1  - Statistical correlation between the printing angle and stress and strain of 3D printed models
EP  - 482
SP  - 475
VL  - 13
DO  - 10.1016/j.prostr.2018.12.079
ER  - 

@conference{
author = "Mitrović, Radivoje and Mišković, Žarko and Ristivojević, Mileta and Dimić, Aleksandar and Danko, Jan and Bucha, Jozef and Milesich, Tomas",
year = "2018",
abstract = "In the strides of the most advanced technological achievements, the use of polymers is becoming increasingly evident both in everyday life and in engineering practice. Complex structures made of polymers attract more attention from scientists and researchers, as their application increases in the most diverse fields of science. This phenomenon requires constant improvement of knowledge and technologies for the production of polymeric structures and parts, but it is equally important to establish reliable databases on the behavior of newly-introduced materials under different load conditions. This work is based on the establishment of statistical correlation between parameters of 3D printed models and their mechanical characteristics in conditions of static axial loading.",
publisher = "Elsevier Science Bv, Amsterdam",
journal = "Procedia Structural Integrity - ECF22 - Loading and environmental effects on structural integrity",
title = "Statistical correlation between the printing angle and stress and strain of 3D printed models",
pages = "482-475",
volume = "13",
doi = "10.1016/j.prostr.2018.12.079"
}

Mitrović, R., Mišković, Ž., Ristivojević, M., Dimić, A., Danko, J., Bucha, J.,& Milesich, T.. (2018). Statistical correlation between the printing angle and stress and strain of 3D printed models. in Procedia Structural Integrity - ECF22 - Loading and environmental effects on structural integrity
Elsevier Science Bv, Amsterdam., 13, 475-482.
https://doi.org/10.1016/j.prostr.2018.12.079

Mitrović R, Mišković Ž, Ristivojević M, Dimić A, Danko J, Bucha J, Milesich T. Statistical correlation between the printing angle and stress and strain of 3D printed models. in Procedia Structural Integrity - ECF22 - Loading and environmental effects on structural integrity. 2018;13:475-482.
doi:10.1016/j.prostr.2018.12.079 .

Mitrović, Radivoje, Mišković, Žarko, Ristivojević, Mileta, Dimić, Aleksandar, Danko, Jan, Bucha, Jozef, Milesich, Tomas, "Statistical correlation between the printing angle and stress and strain of 3D printed models" in Procedia Structural Integrity - ECF22 - Loading and environmental effects on structural integrity, 13 (2018):475-482,
https://doi.org/10.1016/j.prostr.2018.12.079 . .

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

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

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

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

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

TY  - JOUR
AU  - Dimić, Aleksandar
AU  - Mišković, Žarko
AU  - Mitrović, Radivoje
AU  - Ristivojević, Mileta
AU  - Stamenić, Zoran
AU  - Danko, Jan
AU  - Bucha, Jozef
AU  - Milesich, Tomas
PY  - 2018
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/2970
AB  - The advanced development of additive technologies over the past years led to the fact that parts made by these technologies have been increasingly used in the most diverse engineering applications. One of the most famous and the most applied additive technology is 3D printing. In this paper the influence of the material type on the operational characteristics of spur gears manufactured by the 3D printing technology is analyzed, after the experimental testing performed on a back to back gear test rig, in the predefined laboratory conditions.
PB  - Sciendo
T2  - Strojnicky Casopis
T1  - The influence of material on the operational characteristics of spur gears manufactured by the 3D printing technology
EP  - 270
IS  - 3
SP  - 261
VL  - 68
DO  - 10.2478/scjme-2018-0039
ER  - 

@article{
author = "Dimić, Aleksandar and Mišković, Žarko and Mitrović, Radivoje and Ristivojević, Mileta and Stamenić, Zoran and Danko, Jan and Bucha, Jozef and Milesich, Tomas",
year = "2018",
abstract = "The advanced development of additive technologies over the past years led to the fact that parts made by these technologies have been increasingly used in the most diverse engineering applications. One of the most famous and the most applied additive technology is 3D printing. In this paper the influence of the material type on the operational characteristics of spur gears manufactured by the 3D printing technology is analyzed, after the experimental testing performed on a back to back gear test rig, in the predefined laboratory conditions.",
publisher = "Sciendo",
journal = "Strojnicky Casopis",
title = "The influence of material on the operational characteristics of spur gears manufactured by the 3D printing technology",
pages = "270-261",
number = "3",
volume = "68",
doi = "10.2478/scjme-2018-0039"
}

Dimić, A., Mišković, Ž., Mitrović, R., Ristivojević, M., Stamenić, Z., Danko, J., Bucha, J.,& Milesich, T.. (2018). The influence of material on the operational characteristics of spur gears manufactured by the 3D printing technology. in Strojnicky Casopis
Sciendo., 68(3), 261-270.
https://doi.org/10.2478/scjme-2018-0039

Dimić A, Mišković Ž, Mitrović R, Ristivojević M, Stamenić Z, Danko J, Bucha J, Milesich T. The influence of material on the operational characteristics of spur gears manufactured by the 3D printing technology. in Strojnicky Casopis. 2018;68(3):261-270.
doi:10.2478/scjme-2018-0039 .

Dimić, Aleksandar, Mišković, Žarko, Mitrović, Radivoje, Ristivojević, Mileta, Stamenić, Zoran, Danko, Jan, Bucha, Jozef, Milesich, Tomas, "The influence of material on the operational characteristics of spur gears manufactured by the 3D printing technology" in Strojnicky Casopis, 68, no. 3 (2018):261-270,
https://doi.org/10.2478/scjme-2018-0039 . .

TY  - CONF
AU  - Dimić, Aleksandar
AU  - Bakić, Gordana
AU  - Đukić, Miloš
AU  - Šijački Žeravčić, Vera
AU  - Ristivojević, Mileta
PY  - 2015
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/5019
AB  - Modified 2.25Cr1Mo steel, known as a relatively new
generation, grade T24 heat resistant steel (7CrMoVTiB10-
10), is extensively used as a material for fabrication of water
walls panels - evaporator tubes in supercritical boilers of a
new generation in thermal power plants. A special
advantage of T24 steel is low carbon content and the
optimal content of alloying element which simultaneously
provides its good weldability and heat resistance. For
elements up to 10 mm of thickness, made of T24 steel
standards not foreseen previous and subsequent post-weld
heat treatment (PWHT). However, after a series of problems
encountered with welded joints, practice has shown that
some kind of heat treatment is necessary, in order to reduce
the susceptibility to hydrogen induced stress corrosion
cracking (HISCC). This paper deals with the microstructural
characterization of both base material and welded joint of
boiler tube (dimension �����44,5x7,1 mm), made of T24 steel,
before and after PWHT. The aim of this paper is to evaluate
the effect of this type of PWHT on microstructural changes
and its possible impact on the susceptibility to cracking of
T24 welded joints.
PB  - National R&D Institute for Welding and Material Testing- ISIM Timisoara (Romania)
C3  - The 3rd IIW South-East European Welding congress, 2015.,Temisoara
T1  - Characterization of welded joint made of T24 steel (7CrMoVTiB10-10) with and without post-weld heat treatment
EP  - 189
SP  - 185
UR  - https://hdl.handle.net/21.15107/rcub_machinery_5019
ER  - 

@conference{
author = "Dimić, Aleksandar and Bakić, Gordana and Đukić, Miloš and Šijački Žeravčić, Vera and Ristivojević, Mileta",
year = "2015",
abstract = "Modified 2.25Cr1Mo steel, known as a relatively new
generation, grade T24 heat resistant steel (7CrMoVTiB10-
10), is extensively used as a material for fabrication of water
walls panels - evaporator tubes in supercritical boilers of a
new generation in thermal power plants. A special
advantage of T24 steel is low carbon content and the
optimal content of alloying element which simultaneously
provides its good weldability and heat resistance. For
elements up to 10 mm of thickness, made of T24 steel
standards not foreseen previous and subsequent post-weld
heat treatment (PWHT). However, after a series of problems
encountered with welded joints, practice has shown that
some kind of heat treatment is necessary, in order to reduce
the susceptibility to hydrogen induced stress corrosion
cracking (HISCC). This paper deals with the microstructural
characterization of both base material and welded joint of
boiler tube (dimension �����44,5x7,1 mm), made of T24 steel,
before and after PWHT. The aim of this paper is to evaluate
the effect of this type of PWHT on microstructural changes
and its possible impact on the susceptibility to cracking of
T24 welded joints.",
publisher = "National R&D Institute for Welding and Material Testing- ISIM Timisoara (Romania)",
journal = "The 3rd IIW South-East European Welding congress, 2015.,Temisoara",
title = "Characterization of welded joint made of T24 steel (7CrMoVTiB10-10) with and without post-weld heat treatment",
pages = "189-185",
url = "https://hdl.handle.net/21.15107/rcub_machinery_5019"
}

Dimić, A., Bakić, G., Đukić, M., Šijački Žeravčić, V.,& Ristivojević, M.. (2015). Characterization of welded joint made of T24 steel (7CrMoVTiB10-10) with and without post-weld heat treatment. in The 3rd IIW South-East European Welding congress, 2015.,Temisoara
National R&D Institute for Welding and Material Testing- ISIM Timisoara (Romania)., 185-189.
https://hdl.handle.net/21.15107/rcub_machinery_5019

Dimić A, Bakić G, Đukić M, Šijački Žeravčić V, Ristivojević M. Characterization of welded joint made of T24 steel (7CrMoVTiB10-10) with and without post-weld heat treatment. in The 3rd IIW South-East European Welding congress, 2015.,Temisoara. 2015;:185-189.
https://hdl.handle.net/21.15107/rcub_machinery_5019 .

Dimić, Aleksandar, Bakić, Gordana, Đukić, Miloš, Šijački Žeravčić, Vera, Ristivojević, Mileta, "Characterization of welded joint made of T24 steel (7CrMoVTiB10-10) with and without post-weld heat treatment" in The 3rd IIW South-East European Welding congress, 2015.,Temisoara (2015):185-189,
https://hdl.handle.net/21.15107/rcub_machinery_5019 .