TY  - JOUR
AU  - Savković, Mile
AU  - Dedić, Milan
AU  - Pavlović, Goran
AU  - Arsić, Miodrag
AU  - Stamenić, Zoran
PY  - 2019
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/3028
AB  - The conveyor belt for slag and coal transport in the open mine pit "Kolubara" - Serbia is driven by means of two drive drums : attached on separate shafts. Each shaft is driven by two electric motors on both sides. During exploitation, the conveyor belt drive shafts are subjected to torques and transverse forces due to belt tension. The gearboxes and the bearing units on both sides of the drive drum support each shaft. A fracture of one of the drive shafts of the conveyor belt occurred at its connection point with the gearbox. The first part of the paper defines the loads relevant for shaft calculation, based on measurements in different phases of operation and the manufacturer's data. It is followed by the FEM analysis and fatigue analysis, for the most unfavourable load case. It has been established that the critical stress value has occurred near the connection point between the shaft and the gearbox, in the fracture zone. The second part of the paper presents chemical composition and mechanical properties of material, as well as metallographic examination of fracture surface. The experimental test procedure shows that the fracture has occurred not because of an error in the material but as a consequence of the inadequate heat treatment. Superposition of two negative influences: material fatigue and inadequate heat treatment, expressed in the cross section at the point of fracture is the main case of the conveyor belt shaft fracture.
PB  - Univ Osijek, Tech Fac, Slavonski Brod
T2  - Tehnički vjesnik
T1  - Analysis of the Drive Shaft Fracture of the Conveyor Belt for Transport of Coal
EP  - 1338
IS  - 5
SP  - 1333
VL  - 26
DO  - 10.17559/TV-20181031162954
ER  - 

@article{
author = "Savković, Mile and Dedić, Milan and Pavlović, Goran and Arsić, Miodrag and Stamenić, Zoran",
year = "2019",
abstract = "The conveyor belt for slag and coal transport in the open mine pit "Kolubara" - Serbia is driven by means of two drive drums : attached on separate shafts. Each shaft is driven by two electric motors on both sides. During exploitation, the conveyor belt drive shafts are subjected to torques and transverse forces due to belt tension. The gearboxes and the bearing units on both sides of the drive drum support each shaft. A fracture of one of the drive shafts of the conveyor belt occurred at its connection point with the gearbox. The first part of the paper defines the loads relevant for shaft calculation, based on measurements in different phases of operation and the manufacturer's data. It is followed by the FEM analysis and fatigue analysis, for the most unfavourable load case. It has been established that the critical stress value has occurred near the connection point between the shaft and the gearbox, in the fracture zone. The second part of the paper presents chemical composition and mechanical properties of material, as well as metallographic examination of fracture surface. The experimental test procedure shows that the fracture has occurred not because of an error in the material but as a consequence of the inadequate heat treatment. Superposition of two negative influences: material fatigue and inadequate heat treatment, expressed in the cross section at the point of fracture is the main case of the conveyor belt shaft fracture.",
publisher = "Univ Osijek, Tech Fac, Slavonski Brod",
journal = "Tehnički vjesnik",
title = "Analysis of the Drive Shaft Fracture of the Conveyor Belt for Transport of Coal",
pages = "1338-1333",
number = "5",
volume = "26",
doi = "10.17559/TV-20181031162954"
}

Savković, M., Dedić, M., Pavlović, G., Arsić, M.,& Stamenić, Z.. (2019). Analysis of the Drive Shaft Fracture of the Conveyor Belt for Transport of Coal. in Tehnički vjesnik
Univ Osijek, Tech Fac, Slavonski Brod., 26(5), 1333-1338.
https://doi.org/10.17559/TV-20181031162954

Savković M, Dedić M, Pavlović G, Arsić M, Stamenić Z. Analysis of the Drive Shaft Fracture of the Conveyor Belt for Transport of Coal. in Tehnički vjesnik. 2019;26(5):1333-1338.
doi:10.17559/TV-20181031162954 .

Savković, Mile, Dedić, Milan, Pavlović, Goran, Arsić, Miodrag, Stamenić, Zoran, "Analysis of the Drive Shaft Fracture of the Conveyor Belt for Transport of Coal" in Tehnički vjesnik, 26, no. 5 (2019):1333-1338,
https://doi.org/10.17559/TV-20181031162954 . .

TY  - CONF
AU  - Kvrgić, Vladimir
AU  - Vidaković, Jelena
AU  - Lazarević, Mihailo
AU  - Pavlović, Goran
PY  - 2017
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/4146
AB  - Pilots of modern combat aircraft are exposed to the devastating effects of high acceleration
forces and unusual orientation. The pilots’ ability to perform tasks under these extreme flight
conditions must be examined. A centrifuge flight simulator (CFS) for pilot training is designed as
a three-degree-of-freedom 3DoF manipulator with rotational axes. Through rotations about these
axes, acceleration forces that act on aircraft pilots are simulated. The spatial disorientation trainer
(SDT) examines a pilot’s ability to recognise unusual orientations, to adapt to unusual positions
and to persuade the pilot to believe in the aircraft instruments for orientation and not in his own
senses. The SDT is designed as a (4DoF) manipulator with rotational axes. Through rotations
about these axes, different orientations can be achieved; different acceleration forces acting on the
pilot can also be simulated. In this paper, the acceleration forces and angular velocities that act on
the simulator pilot in the CMS and SDT are calculated along with the roll and pitch angles of the
gondola for these forces.
PB  - Beograd : Srpsko društvo za mehaniku
C3  - 6th International Congress of Serbian Society  of Mechanics, Tara, Serbia, June 19-21, 2017
T1  - Calculation of the acceleration force components and roll and pitch link angles of the CFS and SDT
EP  - 10
SP  - 1
UR  - https://hdl.handle.net/21.15107/rcub_machinery_4146
ER  - 

@conference{
author = "Kvrgić, Vladimir and Vidaković, Jelena and Lazarević, Mihailo and Pavlović, Goran",
year = "2017",
abstract = "Pilots of modern combat aircraft are exposed to the devastating effects of high acceleration
forces and unusual orientation. The pilots’ ability to perform tasks under these extreme flight
conditions must be examined. A centrifuge flight simulator (CFS) for pilot training is designed as
a three-degree-of-freedom 3DoF manipulator with rotational axes. Through rotations about these
axes, acceleration forces that act on aircraft pilots are simulated. The spatial disorientation trainer
(SDT) examines a pilot’s ability to recognise unusual orientations, to adapt to unusual positions
and to persuade the pilot to believe in the aircraft instruments for orientation and not in his own
senses. The SDT is designed as a (4DoF) manipulator with rotational axes. Through rotations
about these axes, different orientations can be achieved; different acceleration forces acting on the
pilot can also be simulated. In this paper, the acceleration forces and angular velocities that act on
the simulator pilot in the CMS and SDT are calculated along with the roll and pitch angles of the
gondola for these forces.",
publisher = "Beograd : Srpsko društvo za mehaniku",
journal = "6th International Congress of Serbian Society  of Mechanics, Tara, Serbia, June 19-21, 2017",
title = "Calculation of the acceleration force components and roll and pitch link angles of the CFS and SDT",
pages = "10-1",
url = "https://hdl.handle.net/21.15107/rcub_machinery_4146"
}

Kvrgić, V., Vidaković, J., Lazarević, M.,& Pavlović, G.. (2017). Calculation of the acceleration force components and roll and pitch link angles of the CFS and SDT. in 6th International Congress of Serbian Society  of Mechanics, Tara, Serbia, June 19-21, 2017
Beograd : Srpsko društvo za mehaniku., 1-10.
https://hdl.handle.net/21.15107/rcub_machinery_4146

Kvrgić V, Vidaković J, Lazarević M, Pavlović G. Calculation of the acceleration force components and roll and pitch link angles of the CFS and SDT. in 6th International Congress of Serbian Society  of Mechanics, Tara, Serbia, June 19-21, 2017. 2017;:1-10.
https://hdl.handle.net/21.15107/rcub_machinery_4146 .

Kvrgić, Vladimir, Vidaković, Jelena, Lazarević, Mihailo, Pavlović, Goran, "Calculation of the acceleration force components and roll and pitch link angles of the CFS and SDT" in 6th International Congress of Serbian Society  of Mechanics, Tara, Serbia, June 19-21, 2017 (2017):1-10,
https://hdl.handle.net/21.15107/rcub_machinery_4146 .