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

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

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

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

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

TY  - JOUR
AU  - Arsić, Miodrag
AU  - Flajs, Željko
AU  - Sedmak, Aleksandar
AU  - Veg, Emil
AU  - Sedmak, Simon
PY  - 2022
UR  - http://rims.institutims.rs/handle/123456789/665
AB  - Causes of damage occurrence in vital components of welded structures of the bucket-wheel
excavator boom (DU1) at the coal landfill of the thermal power plant 'Nikola Tesla A' in Obrenovac
(Serbia) are investigated. Bucket-wheel excavator was produced by French company 'Ameco' and it
moves along the circular track. Taking into account lack of technical documentation, all tests and
were carried out under the assumption that welded structures were made of structural steels S355 and
S235. Investigation of causes of damage occurrence are based on results of non-destructive tests
(NDT) and tensometric measurements.
PB  - Trans Tech Publications Ltd, Switzerland
T2  - Engineering Innovations
T1  - Damage occurrence in welded structures of the bucket-wheel boom
EP  - 48
SP  - 41
VL  - 2
DO  - 10.4028/p-15iqnw
ER  - 

@article{
author = "Arsić, Miodrag and Flajs, Željko and Sedmak, Aleksandar and Veg, Emil and Sedmak, Simon",
year = "2022",
abstract = "Causes of damage occurrence in vital components of welded structures of the bucket-wheel
excavator boom (DU1) at the coal landfill of the thermal power plant 'Nikola Tesla A' in Obrenovac
(Serbia) are investigated. Bucket-wheel excavator was produced by French company 'Ameco' and it
moves along the circular track. Taking into account lack of technical documentation, all tests and
were carried out under the assumption that welded structures were made of structural steels S355 and
S235. Investigation of causes of damage occurrence are based on results of non-destructive tests
(NDT) and tensometric measurements.",
publisher = "Trans Tech Publications Ltd, Switzerland",
journal = "Engineering Innovations",
title = "Damage occurrence in welded structures of the bucket-wheel boom",
pages = "48-41",
volume = "2",
doi = "10.4028/p-15iqnw"
}

Arsić, M., Flajs, Ž., Sedmak, A., Veg, E.,& Sedmak, S.. (2022). Damage occurrence in welded structures of the bucket-wheel boom. in Engineering Innovations
Trans Tech Publications Ltd, Switzerland., 2, 41-48.
https://doi.org/10.4028/p-15iqnw

Arsić M, Flajs Ž, Sedmak A, Veg E, Sedmak S. Damage occurrence in welded structures of the bucket-wheel boom. in Engineering Innovations. 2022;2:41-48.
doi:10.4028/p-15iqnw .

Arsić, Miodrag, Flajs, Željko, Sedmak, Aleksandar, Veg, Emil, Sedmak, Simon, "Damage occurrence in welded structures of the bucket-wheel boom" in Engineering Innovations, 2 (2022):41-48,
https://doi.org/10.4028/p-15iqnw . .

TY  - CONF
AU  - Vukšić-Popović, Marija
AU  - Tanasković, Jovan
AU  - Momčilović, Dejan
AU  - Lučanin, Vojkan
PY  - 2021
UR  - http://rims.institutims.rs/handle/123456789/476
AB  - The coupling system provides a mechanical connection between European railway vehicles. Screw couplings are designed as a safety device in railway vehicles with coupling links and screw as two main components intended to break. Failure of these components is necessary when the load between vehicles is exceeded, otherwise more significant draw gear elements will fracture. The analysis of train break cases shows that the failure of the links occurs only in an approx. 6% of cases. Therefore, the links taken from exploitation after more than 30 years in operation were tested to determine their mechanical characteristics. Tensile testing was performed according to the ISO 6892-1 standard with a continual force and a minimal and maximal test speed prescribed by ISO 6892-1. The values of mechanical characteristics of coupling links are substantially improved during production after heat treatment by hardening and tempering. However, test results of mechanical characteristics didn’t meet all prescribed limits for the minimum requirements according to UIC 826. The current regulations of mechanical characteristics were not in force in time of link production. Examination of the tested links showed a ductile fracture and the cross-sectional area shows the planar stress state.
C3  - International Conference of Experimental and Numerical Investigations and New Technologies CNN TECH 2021, Zlatibor, Serbia
T1  - Experimental research of mechanical characteristics of railway vehicles safety coupling components
SP  - 32
UR  - https://hdl.handle.net/21.15107/rcub_rims_476
ER  - 

@conference{
author = "Vukšić-Popović, Marija and Tanasković, Jovan and Momčilović, Dejan and Lučanin, Vojkan",
year = "2021",
abstract = "The coupling system provides a mechanical connection between European railway vehicles. Screw couplings are designed as a safety device in railway vehicles with coupling links and screw as two main components intended to break. Failure of these components is necessary when the load between vehicles is exceeded, otherwise more significant draw gear elements will fracture. The analysis of train break cases shows that the failure of the links occurs only in an approx. 6% of cases. Therefore, the links taken from exploitation after more than 30 years in operation were tested to determine their mechanical characteristics. Tensile testing was performed according to the ISO 6892-1 standard with a continual force and a minimal and maximal test speed prescribed by ISO 6892-1. The values of mechanical characteristics of coupling links are substantially improved during production after heat treatment by hardening and tempering. However, test results of mechanical characteristics didn’t meet all prescribed limits for the minimum requirements according to UIC 826. The current regulations of mechanical characteristics were not in force in time of link production. Examination of the tested links showed a ductile fracture and the cross-sectional area shows the planar stress state.",
journal = "International Conference of Experimental and Numerical Investigations and New Technologies CNN TECH 2021, Zlatibor, Serbia",
title = "Experimental research of mechanical characteristics of railway vehicles safety coupling components",
pages = "32",
url = "https://hdl.handle.net/21.15107/rcub_rims_476"
}

Vukšić-Popović, M., Tanasković, J., Momčilović, D.,& Lučanin, V.. (2021). Experimental research of mechanical characteristics of railway vehicles safety coupling components. in International Conference of Experimental and Numerical Investigations and New Technologies CNN TECH 2021, Zlatibor, Serbia, 32.
https://hdl.handle.net/21.15107/rcub_rims_476

Vukšić-Popović M, Tanasković J, Momčilović D, Lučanin V. Experimental research of mechanical characteristics of railway vehicles safety coupling components. in International Conference of Experimental and Numerical Investigations and New Technologies CNN TECH 2021, Zlatibor, Serbia. 2021;:32.
https://hdl.handle.net/21.15107/rcub_rims_476 .

Vukšić-Popović, Marija, Tanasković, Jovan, Momčilović, Dejan, Lučanin, Vojkan, "Experimental research of mechanical characteristics of railway vehicles safety coupling components" in International Conference of Experimental and Numerical Investigations and New Technologies CNN TECH 2021, Zlatibor, Serbia (2021):32,
https://hdl.handle.net/21.15107/rcub_rims_476 .