TY  - CONF
AU  - Sedmak, Aleksandar
AU  - Martić, Igor
AU  - Jeremić, Lazar
AU  - Kirin, Snežana
AU  - Golubović, Tamara
PY  - 2022
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/6430
AB  - The effect of proof over-pressure on pressure vessels structural integrity is analysed. Risk based approach is applied using Failure Analysis Diagramme to assess likelihood of failure. Special attention is paid to crack-like defects detected by NDT regular testing which are unacceptable by standards, but difficult to be repaired. It was show, using two examples, that such defects can remain if some strict conditions are fulfilled. In any case, with or without crack-like defects, it was shown that testing of pressure vessels with significant over-pressure can cause much more problems than it has benefits, because it acts more like the first step in eventual failure, than being proof to anything.
PB  - Elsevier B.V.
C3  - 23rd European Conference on Fracture, ECF 2022, Procedia Structural Integrity
T1  - Effects of Over-Loading on Pressure Vessel Integrity
EP  - 361
SP  - 356
VL  - 42
DO  - 10.1016/j.prostr.2022.12.044
ER  - 

@conference{
author = "Sedmak, Aleksandar and Martić, Igor and Jeremić, Lazar and Kirin, Snežana and Golubović, Tamara",
year = "2022",
abstract = "The effect of proof over-pressure on pressure vessels structural integrity is analysed. Risk based approach is applied using Failure Analysis Diagramme to assess likelihood of failure. Special attention is paid to crack-like defects detected by NDT regular testing which are unacceptable by standards, but difficult to be repaired. It was show, using two examples, that such defects can remain if some strict conditions are fulfilled. In any case, with or without crack-like defects, it was shown that testing of pressure vessels with significant over-pressure can cause much more problems than it has benefits, because it acts more like the first step in eventual failure, than being proof to anything.",
publisher = "Elsevier B.V.",
journal = "23rd European Conference on Fracture, ECF 2022, Procedia Structural Integrity",
title = "Effects of Over-Loading on Pressure Vessel Integrity",
pages = "361-356",
volume = "42",
doi = "10.1016/j.prostr.2022.12.044"
}

Sedmak, A., Martić, I., Jeremić, L., Kirin, S.,& Golubović, T.. (2022). Effects of Over-Loading on Pressure Vessel Integrity. in 23rd European Conference on Fracture, ECF 2022, Procedia Structural Integrity
Elsevier B.V.., 42, 356-361.
https://doi.org/10.1016/j.prostr.2022.12.044

Sedmak A, Martić I, Jeremić L, Kirin S, Golubović T. Effects of Over-Loading on Pressure Vessel Integrity. in 23rd European Conference on Fracture, ECF 2022, Procedia Structural Integrity. 2022;42:356-361.
doi:10.1016/j.prostr.2022.12.044 .

Sedmak, Aleksandar, Martić, Igor, Jeremić, Lazar, Kirin, Snežana, Golubović, Tamara, "Effects of Over-Loading on Pressure Vessel Integrity" in 23rd European Conference on Fracture, ECF 2022, Procedia Structural Integrity, 42 (2022):356-361,
https://doi.org/10.1016/j.prostr.2022.12.044 . .

TY  - JOUR
AU  - Kirin, Snežana
AU  - Jeremić, Lazar
AU  - Sedmak, Aleksandar
AU  - Martić, Igor
AU  - Sedmak, Simon
AU  - Vucetić, Ivana
AU  - Golubović, Tamara
PY  - 2020
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/4383
AB  - Risk based analysis of reverse hydro power plant penstock structural integrity is performed using fracture mechanics parameters. To assess its structural integrity, extensive testing of the full-scale prototype had been performed, including hydrostatic over-pressurizing, during the design phase. More recently, the Failure Assessment Diagram has been used to evaluate probability, whereas phenomenological analysis has been used to estimate consequence, in the scope of common risk estimation. It is shown that over-pressuring has potential detrimental effect on pipeline safety, i.e. structural integrity.
PB  - Gruppo Italiano Frattura, Cassino
T2  - Frattura Ed Integrita Strutturale
T1  - Risk based analysis of RHPP penstock structural integrity
EP  - 352
IS  - 53
SP  - 345
DO  - 10.3221/IGF-ESIS.53.27
ER  - 

@article{
author = "Kirin, Snežana and Jeremić, Lazar and Sedmak, Aleksandar and Martić, Igor and Sedmak, Simon and Vucetić, Ivana and Golubović, Tamara",
year = "2020",
abstract = "Risk based analysis of reverse hydro power plant penstock structural integrity is performed using fracture mechanics parameters. To assess its structural integrity, extensive testing of the full-scale prototype had been performed, including hydrostatic over-pressurizing, during the design phase. More recently, the Failure Assessment Diagram has been used to evaluate probability, whereas phenomenological analysis has been used to estimate consequence, in the scope of common risk estimation. It is shown that over-pressuring has potential detrimental effect on pipeline safety, i.e. structural integrity.",
publisher = "Gruppo Italiano Frattura, Cassino",
journal = "Frattura Ed Integrita Strutturale",
title = "Risk based analysis of RHPP penstock structural integrity",
pages = "352-345",
number = "53",
doi = "10.3221/IGF-ESIS.53.27"
}

Kirin, S., Jeremić, L., Sedmak, A., Martić, I., Sedmak, S., Vucetić, I.,& Golubović, T.. (2020). Risk based analysis of RHPP penstock structural integrity. in Frattura Ed Integrita Strutturale
Gruppo Italiano Frattura, Cassino.(53), 345-352.
https://doi.org/10.3221/IGF-ESIS.53.27

Kirin S, Jeremić L, Sedmak A, Martić I, Sedmak S, Vucetić I, Golubović T. Risk based analysis of RHPP penstock structural integrity. in Frattura Ed Integrita Strutturale. 2020;(53):345-352.
doi:10.3221/IGF-ESIS.53.27 .

Kirin, Snežana, Jeremić, Lazar, Sedmak, Aleksandar, Martić, Igor, Sedmak, Simon, Vucetić, Ivana, Golubović, Tamara, "Risk based analysis of RHPP penstock structural integrity" in Frattura Ed Integrita Strutturale, no. 53 (2020):345-352,
https://doi.org/10.3221/IGF-ESIS.53.27 . .

TY  - JOUR
AU  - Jeremić, Lazar
AU  - Đorđević, Branislav
AU  - Sedmak, Simon
AU  - Sedmak, Aleksandar
AU  - Rakin, Marko
AU  - Arandelović, Mihajlo
PY  - 2018
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/3777
AB  - Presented is the effect of plasma hardfacing (or just hardfacing) and carbides presence on the occurrence of cracks and microcracks in the welded layer. The reasons behind this phenomenon are analysed and explained. In addition, the plasma welding technology with all the necessary data such as welding parameters is shown for the case of undamaged tooth of a machine used for the milling of marble. The welded layer with a significant amount of tungsten-carbide is applied onto new, undamaged tooth in order to improve the characteristics of the surface layer of the base material by increasing its hardness which leads to increasing of wear resistance and impact toughness. After welding, the tooth is cut using electrical discharge machining (EDM) for examining the applied surface layer in different locations throughout the welded joint. Macro and microstructural analysis aided in determining the characteristics of the surface layer. The nature and causes of cracks and microcracks are analysed in order to provide a better solution to avoid crack occurrence, as well as in determining their potential effect on the integrity of the tooth as a whole.
PB  - Society for Structural Integrity and Life, Institute for Material Testing
T2  - Structural Integrity and Life
T1  - Effect of plasma hardfacing and carbides presence on the occurrence of cracks and microcracks
EP  - 103
IS  - 2
SP  - 99
VL  - 18
UR  - https://hdl.handle.net/21.15107/rcub_technorep_3777
ER  - 

@article{
author = "Jeremić, Lazar and Đorđević, Branislav and Sedmak, Simon and Sedmak, Aleksandar and Rakin, Marko and Arandelović, Mihajlo",
year = "2018",
abstract = "Presented is the effect of plasma hardfacing (or just hardfacing) and carbides presence on the occurrence of cracks and microcracks in the welded layer. The reasons behind this phenomenon are analysed and explained. In addition, the plasma welding technology with all the necessary data such as welding parameters is shown for the case of undamaged tooth of a machine used for the milling of marble. The welded layer with a significant amount of tungsten-carbide is applied onto new, undamaged tooth in order to improve the characteristics of the surface layer of the base material by increasing its hardness which leads to increasing of wear resistance and impact toughness. After welding, the tooth is cut using electrical discharge machining (EDM) for examining the applied surface layer in different locations throughout the welded joint. Macro and microstructural analysis aided in determining the characteristics of the surface layer. The nature and causes of cracks and microcracks are analysed in order to provide a better solution to avoid crack occurrence, as well as in determining their potential effect on the integrity of the tooth as a whole.",
publisher = "Society for Structural Integrity and Life, Institute for Material Testing",
journal = "Structural Integrity and Life",
title = "Effect of plasma hardfacing and carbides presence on the occurrence of cracks and microcracks",
pages = "103-99",
number = "2",
volume = "18",
url = "https://hdl.handle.net/21.15107/rcub_technorep_3777"
}

Jeremić, L., Đorđević, B., Sedmak, S., Sedmak, A., Rakin, M.,& Arandelović, M.. (2018). Effect of plasma hardfacing and carbides presence on the occurrence of cracks and microcracks. in Structural Integrity and Life
Society for Structural Integrity and Life, Institute for Material Testing., 18(2), 99-103.
https://hdl.handle.net/21.15107/rcub_technorep_3777

Jeremić L, Đorđević B, Sedmak S, Sedmak A, Rakin M, Arandelović M. Effect of plasma hardfacing and carbides presence on the occurrence of cracks and microcracks. in Structural Integrity and Life. 2018;18(2):99-103.
https://hdl.handle.net/21.15107/rcub_technorep_3777 .

Jeremić, Lazar, Đorđević, Branislav, Sedmak, Simon, Sedmak, Aleksandar, Rakin, Marko, Arandelović, Mihajlo, "Effect of plasma hardfacing and carbides presence on the occurrence of cracks and microcracks" in Structural Integrity and Life, 18, no. 2 (2018):99-103,
https://hdl.handle.net/21.15107/rcub_technorep_3777 .