TY  - JOUR
AU  - Culafić, Stefan
AU  - Maneski, Taško
AU  - Bajić, Darko
PY  - 2020
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/3252
AB  - This paper describes pipeline stress analysis, primarilybranch junctions, as a structural element in hydro-power plants. Pipelines are exposed to internal pressure,which is present under working conditions. Analysis of stresses in the pipeline of the hydropower plant is based on analytical, numerical, and experimental methods In this paper, we will define the critical elements of the pipeline. After that, we will determine critical areas in the branch junction, under experimental conditions, where strain gauges should be installed. The obtained resultsshow that a boiler formula can be efficiently applied in the stress analysis. Also, a correlation between the internal pressure and the maximum circumferential stresses in the elastic zone is given. In the final sections of the paper, the limit value of the internal pressure as a load for which stress in the zone of plasticity appears and the safety factor of the branch junction in the exploitation conditions are determined. The contribution of this work is the unification and deepening of the topic related to the problem of the testing othydro-power structural elements.
PB  - Assoc Mechanical Engineers Technicians Slovenia, Ljubljana
T2  - Strojniski Vestnik-Journal of Mechanical Engineering
T1  - Stress Analysis of a Pipeline as a Hydropower Plant Structural Element
EP  - 60
IS  - 1
SP  - 51
VL  - 66
DO  - 10.5545/sv-jme.2019.6157
ER  - 

@article{
author = "Culafić, Stefan and Maneski, Taško and Bajić, Darko",
year = "2020",
abstract = "This paper describes pipeline stress analysis, primarilybranch junctions, as a structural element in hydro-power plants. Pipelines are exposed to internal pressure,which is present under working conditions. Analysis of stresses in the pipeline of the hydropower plant is based on analytical, numerical, and experimental methods In this paper, we will define the critical elements of the pipeline. After that, we will determine critical areas in the branch junction, under experimental conditions, where strain gauges should be installed. The obtained resultsshow that a boiler formula can be efficiently applied in the stress analysis. Also, a correlation between the internal pressure and the maximum circumferential stresses in the elastic zone is given. In the final sections of the paper, the limit value of the internal pressure as a load for which stress in the zone of plasticity appears and the safety factor of the branch junction in the exploitation conditions are determined. The contribution of this work is the unification and deepening of the topic related to the problem of the testing othydro-power structural elements.",
publisher = "Assoc Mechanical Engineers Technicians Slovenia, Ljubljana",
journal = "Strojniski Vestnik-Journal of Mechanical Engineering",
title = "Stress Analysis of a Pipeline as a Hydropower Plant Structural Element",
pages = "60-51",
number = "1",
volume = "66",
doi = "10.5545/sv-jme.2019.6157"
}

Culafić, S., Maneski, T.,& Bajić, D.. (2020). Stress Analysis of a Pipeline as a Hydropower Plant Structural Element. in Strojniski Vestnik-Journal of Mechanical Engineering
Assoc Mechanical Engineers Technicians Slovenia, Ljubljana., 66(1), 51-60.
https://doi.org/10.5545/sv-jme.2019.6157

Culafić S, Maneski T, Bajić D. Stress Analysis of a Pipeline as a Hydropower Plant Structural Element. in Strojniski Vestnik-Journal of Mechanical Engineering. 2020;66(1):51-60.
doi:10.5545/sv-jme.2019.6157 .

Culafić, Stefan, Maneski, Taško, Bajić, Darko, "Stress Analysis of a Pipeline as a Hydropower Plant Structural Element" in Strojniski Vestnik-Journal of Mechanical Engineering, 66, no. 1 (2020):51-60,
https://doi.org/10.5545/sv-jme.2019.6157 . .

TY  - JOUR
AU  - Bajić, Darko
AU  - Momčilović, Nikola
AU  - Maneski, Taško
AU  - Balać, Martina
AU  - Kozak, Dražan
AU  - Culafić, Stefan
PY  - 2017
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/2521
AB  - The subject of this paper is testing of complex geometrical structures, i.e. stress analysis of a pipe branch model of A6 third pipeline at Hydropower Plant Perucica, Niksic. Analysis of pipe branch model stress distribution was carried out by using finite element method and experimental methods. Finite element method defined 3D pipe branch model. Numerical calculation defined critical locations on model, i.e. locations with the greatest stress concentration. Strain gauges were placed on identified critical locations. Measured stress values confirmed values obtained by using numerical calculation. Experimental measurements were also taken by using new digital image correlation (DIC) method. DIC method is an optical non-contact method that can provide full 3D stress field and enables better understanding of complex structures such as pipe branches. The aim of this paper was to determine stress concentration factor for the pipe branch model by using numerical and experimental analysis.
PB  - Univ Osijek, Tech Fac, Slavonski Brod
T2  - Tehnički vjesnik
T1  - Numerical and experimental determination of stress concentration factor for a pipe branch model
EP  - 692
IS  - 3
SP  - 687
VL  - 24
DO  - 10.17559/TV-20151126222916
ER  - 

@article{
author = "Bajić, Darko and Momčilović, Nikola and Maneski, Taško and Balać, Martina and Kozak, Dražan and Culafić, Stefan",
year = "2017",
abstract = "The subject of this paper is testing of complex geometrical structures, i.e. stress analysis of a pipe branch model of A6 third pipeline at Hydropower Plant Perucica, Niksic. Analysis of pipe branch model stress distribution was carried out by using finite element method and experimental methods. Finite element method defined 3D pipe branch model. Numerical calculation defined critical locations on model, i.e. locations with the greatest stress concentration. Strain gauges were placed on identified critical locations. Measured stress values confirmed values obtained by using numerical calculation. Experimental measurements were also taken by using new digital image correlation (DIC) method. DIC method is an optical non-contact method that can provide full 3D stress field and enables better understanding of complex structures such as pipe branches. The aim of this paper was to determine stress concentration factor for the pipe branch model by using numerical and experimental analysis.",
publisher = "Univ Osijek, Tech Fac, Slavonski Brod",
journal = "Tehnički vjesnik",
title = "Numerical and experimental determination of stress concentration factor for a pipe branch model",
pages = "692-687",
number = "3",
volume = "24",
doi = "10.17559/TV-20151126222916"
}

Bajić, D., Momčilović, N., Maneski, T., Balać, M., Kozak, D.,& Culafić, S.. (2017). Numerical and experimental determination of stress concentration factor for a pipe branch model. in Tehnički vjesnik
Univ Osijek, Tech Fac, Slavonski Brod., 24(3), 687-692.
https://doi.org/10.17559/TV-20151126222916

Bajić D, Momčilović N, Maneski T, Balać M, Kozak D, Culafić S. Numerical and experimental determination of stress concentration factor for a pipe branch model. in Tehnički vjesnik. 2017;24(3):687-692.
doi:10.17559/TV-20151126222916 .

Bajić, Darko, Momčilović, Nikola, Maneski, Taško, Balać, Martina, Kozak, Dražan, Culafić, Stefan, "Numerical and experimental determination of stress concentration factor for a pipe branch model" in Tehnički vjesnik, 24, no. 3 (2017):687-692,
https://doi.org/10.17559/TV-20151126222916 . .