TY  - JOUR
AU  - Crowley, Helen
AU  - Despotaki, Venetia
AU  - Silva, Vitor
AU  - Dabbeek, Jamal
AU  - Romao, Xavier
AU  - Pereira, Nuno
AU  - Castro, Jose Miguel
AU  - Daniell, James
AU  - Veliu, Enes
AU  - Bilgin, Huseyin
AU  - Adam, Christoph
AU  - Deyanova, Manya
AU  - Ademović, Naida
AU  - Atalić, Josip
AU  - Riga, Evi
AU  - Karatzetzou, Anna
AU  - Bessason, Bjarni
AU  - Shendova, Veronika
AU  - Tiganescu, Alexandru
AU  - Toma-Danila, Dragos
AU  - Žugić, Željko
AU  - Akkar, Sinan
AU  - Hancilar, Ufuk
PY  - 2021
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/3624
AB  - As part of the development of a European Seismic Risk Model 2020 (ESRM20), the spatial and temporal evolution of seismic design across Europe has been studied in order to better classify reinforced concrete buildings (which represent more than 30% of the approximately 145 million residential, commercial and industrial buildings in Europe) and map them to vulnerability models based on simulated seismic design. This paper summarises the model that has been developed to assign the years when different seismic design levels (low code, moderate code and high code) were introduced in a number of European countries and the associated lateral forces that were specified spatially within each country for the low and moderate codes for typical reinforced concrete mid-rise buildings. This process has led to an improved understanding of how design regulations evolved across Europe and how this has impacted the vulnerability of the European residential building stock. The model estimates that similar to 60% of the reinforced concrete buildings in Europe have been seismically designed, and of those buildings similar to 60% have been designed to low code, similar to 25% to moderate code and 15% to high code. This seismic design model aims at being a dynamic source of information that will be continuously updated with additional feedback from local experts and datasets. To this end, all of the data has been made openly available as shapefiles on a GitLab repository.
PB  - Springer, Dordrecht
T2  - Bulletin of Earthquake Engineering
T1  - Model of seismic design lateral force levels for the existing reinforced concrete European building stock
EP  - 2865
IS  - 7
SP  - 2839
VL  - 19
DO  - 10.1007/s10518-021-01083-3
ER  - 

@article{
author = "Crowley, Helen and Despotaki, Venetia and Silva, Vitor and Dabbeek, Jamal and Romao, Xavier and Pereira, Nuno and Castro, Jose Miguel and Daniell, James and Veliu, Enes and Bilgin, Huseyin and Adam, Christoph and Deyanova, Manya and Ademović, Naida and Atalić, Josip and Riga, Evi and Karatzetzou, Anna and Bessason, Bjarni and Shendova, Veronika and Tiganescu, Alexandru and Toma-Danila, Dragos and Žugić, Željko and Akkar, Sinan and Hancilar, Ufuk",
year = "2021",
abstract = "As part of the development of a European Seismic Risk Model 2020 (ESRM20), the spatial and temporal evolution of seismic design across Europe has been studied in order to better classify reinforced concrete buildings (which represent more than 30% of the approximately 145 million residential, commercial and industrial buildings in Europe) and map them to vulnerability models based on simulated seismic design. This paper summarises the model that has been developed to assign the years when different seismic design levels (low code, moderate code and high code) were introduced in a number of European countries and the associated lateral forces that were specified spatially within each country for the low and moderate codes for typical reinforced concrete mid-rise buildings. This process has led to an improved understanding of how design regulations evolved across Europe and how this has impacted the vulnerability of the European residential building stock. The model estimates that similar to 60% of the reinforced concrete buildings in Europe have been seismically designed, and of those buildings similar to 60% have been designed to low code, similar to 25% to moderate code and 15% to high code. This seismic design model aims at being a dynamic source of information that will be continuously updated with additional feedback from local experts and datasets. To this end, all of the data has been made openly available as shapefiles on a GitLab repository.",
publisher = "Springer, Dordrecht",
journal = "Bulletin of Earthquake Engineering",
title = "Model of seismic design lateral force levels for the existing reinforced concrete European building stock",
pages = "2865-2839",
number = "7",
volume = "19",
doi = "10.1007/s10518-021-01083-3"
}

Crowley, H., Despotaki, V., Silva, V., Dabbeek, J., Romao, X., Pereira, N., Castro, J. M., Daniell, J., Veliu, E., Bilgin, H., Adam, C., Deyanova, M., Ademović, N., Atalić, J., Riga, E., Karatzetzou, A., Bessason, B., Shendova, V., Tiganescu, A., Toma-Danila, D., Žugić, Ž., Akkar, S.,& Hancilar, U.. (2021). Model of seismic design lateral force levels for the existing reinforced concrete European building stock. in Bulletin of Earthquake Engineering
Springer, Dordrecht., 19(7), 2839-2865.
https://doi.org/10.1007/s10518-021-01083-3

Crowley H, Despotaki V, Silva V, Dabbeek J, Romao X, Pereira N, Castro JM, Daniell J, Veliu E, Bilgin H, Adam C, Deyanova M, Ademović N, Atalić J, Riga E, Karatzetzou A, Bessason B, Shendova V, Tiganescu A, Toma-Danila D, Žugić Ž, Akkar S, Hancilar U. Model of seismic design lateral force levels for the existing reinforced concrete European building stock. in Bulletin of Earthquake Engineering. 2021;19(7):2839-2865.
doi:10.1007/s10518-021-01083-3 .

Crowley, Helen, Despotaki, Venetia, Silva, Vitor, Dabbeek, Jamal, Romao, Xavier, Pereira, Nuno, Castro, Jose Miguel, Daniell, James, Veliu, Enes, Bilgin, Huseyin, Adam, Christoph, Deyanova, Manya, Ademović, Naida, Atalić, Josip, Riga, Evi, Karatzetzou, Anna, Bessason, Bjarni, Shendova, Veronika, Tiganescu, Alexandru, Toma-Danila, Dragos, Žugić, Željko, Akkar, Sinan, Hancilar, Ufuk, "Model of seismic design lateral force levels for the existing reinforced concrete European building stock" in Bulletin of Earthquake Engineering, 19, no. 7 (2021):2839-2865,
https://doi.org/10.1007/s10518-021-01083-3 . .

TY  - JOUR
AU  - Crowley, Helen
AU  - Despotaki, Venetia
AU  - Rodrigues, Daniela
AU  - Silva, Vitor
AU  - Toma-Danila, Dragos
AU  - Riga, Evi
AU  - Karatzetzou, Anna
AU  - Fotopoulou, Stavroula
AU  - Žugić, Željko
AU  - Sousa, Luis
AU  - Ozcebe, Sevgi
AU  - Gamba, Paolo
PY  - 2020
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/3367
AB  - Building exposure and vulnerability models for seismic risk assessment have been the focus of a number of European projects in recent years, but there has never been a concerted effort among the research community to produce a uniform European risk model. The European Commission's Horizon 2020 SERA project has a work package that is dedicated to that objective, through the development of an exposure model, an associated set of fragility/vulnerability models, and a database of socioeconomic indicators in order to calculate probabilistic integrated seismic risk at a European scale. This article provides details of the development of the first versions of the European exposure model that describe the distribution of the main residential, industrial and commercial building classes across all countries in Europe, as well as their occupants and replacement costs. The v0.1 of the European exposure model has been integrated within the Global Earthquake Model's global exposure and risk maps. Preliminary analyses using the model show that almost 35% of the residential population in Europe is exposed to a 475-year return period peak ground acceleration (PGA) hazard of at least 0.1 g, thus highlighting the importance of European seismic risk modeling and mitigation.
PB  - Sage Publications Inc, Thousand Oaks
T2  - Earthquake Spectra
T1  - Exposure model for European seismic risk assessment
EP  - 273
IS  - 1_SUPPL
SP  - 252
VL  - 36
DO  - 10.1177/8755293020919429
ER  - 

@article{
author = "Crowley, Helen and Despotaki, Venetia and Rodrigues, Daniela and Silva, Vitor and Toma-Danila, Dragos and Riga, Evi and Karatzetzou, Anna and Fotopoulou, Stavroula and Žugić, Željko and Sousa, Luis and Ozcebe, Sevgi and Gamba, Paolo",
year = "2020",
abstract = "Building exposure and vulnerability models for seismic risk assessment have been the focus of a number of European projects in recent years, but there has never been a concerted effort among the research community to produce a uniform European risk model. The European Commission's Horizon 2020 SERA project has a work package that is dedicated to that objective, through the development of an exposure model, an associated set of fragility/vulnerability models, and a database of socioeconomic indicators in order to calculate probabilistic integrated seismic risk at a European scale. This article provides details of the development of the first versions of the European exposure model that describe the distribution of the main residential, industrial and commercial building classes across all countries in Europe, as well as their occupants and replacement costs. The v0.1 of the European exposure model has been integrated within the Global Earthquake Model's global exposure and risk maps. Preliminary analyses using the model show that almost 35% of the residential population in Europe is exposed to a 475-year return period peak ground acceleration (PGA) hazard of at least 0.1 g, thus highlighting the importance of European seismic risk modeling and mitigation.",
publisher = "Sage Publications Inc, Thousand Oaks",
journal = "Earthquake Spectra",
title = "Exposure model for European seismic risk assessment",
pages = "273-252",
number = "1_SUPPL",
volume = "36",
doi = "10.1177/8755293020919429"
}

Crowley, H., Despotaki, V., Rodrigues, D., Silva, V., Toma-Danila, D., Riga, E., Karatzetzou, A., Fotopoulou, S., Žugić, Ž., Sousa, L., Ozcebe, S.,& Gamba, P.. (2020). Exposure model for European seismic risk assessment. in Earthquake Spectra
Sage Publications Inc, Thousand Oaks., 36(1_SUPPL), 252-273.
https://doi.org/10.1177/8755293020919429

Crowley H, Despotaki V, Rodrigues D, Silva V, Toma-Danila D, Riga E, Karatzetzou A, Fotopoulou S, Žugić Ž, Sousa L, Ozcebe S, Gamba P. Exposure model for European seismic risk assessment. in Earthquake Spectra. 2020;36(1_SUPPL):252-273.
doi:10.1177/8755293020919429 .

Crowley, Helen, Despotaki, Venetia, Rodrigues, Daniela, Silva, Vitor, Toma-Danila, Dragos, Riga, Evi, Karatzetzou, Anna, Fotopoulou, Stavroula, Žugić, Željko, Sousa, Luis, Ozcebe, Sevgi, Gamba, Paolo, "Exposure model for European seismic risk assessment" in Earthquake Spectra, 36, no. 1_SUPPL (2020):252-273,
https://doi.org/10.1177/8755293020919429 . .

TY  - JOUR
AU  - Pavlović, Marko
AU  - Dojčinović, Marina
AU  - Prokić-Cvetković, Radica
AU  - Andrić, Ljubiša
AU  - Ceganjac, Zoran
AU  - Trumbulović, Ljiljana
PY  - 2019
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/3090
AB  - This paper examines the possibility of using basalt-based glass ceramics for construction of structural parts of equipment in metallurgy and mining. An ultrasonic vibration method with a stationary sample pursuant to the ASTM G32 standard was used to evaluate the possibility of the glass ceramic samples application in such operating conditions. As the starting material for synthesis of samples, olivine-pyroxene basalt from the locality Vrelo-Kopaonik Mountain (Serbia) was used. In order to obtain pre-determined structure and properties of basalt-based glass ceramics, raw material preparation methods through the sample crushing, grinding, and mechanical activation processes have been examined together with sample synthesis by means of melting, casting, and thermal treatment applied for the samples concerned. The mass loss of samples in function of the cavitation time was monitored. Sample surface degradation level was quantified using the image analysis. During the test, changes in sample morphology were monitored by means of the scanning electronic microscopy method. The results showed that basalt-based glass ceramics are highly resistant to cavitation wear and can be used in similar exploitation conditions as a substitute for other metal materials.
PB  - MDPI, Basel
T2  - Materials
T1  - Cavitation Wear of Basalt-Based Glass Ceramic
IS  - 9
VL  - 12
DO  - 10.3390/ma12091552
ER  - 

@article{
author = "Pavlović, Marko and Dojčinović, Marina and Prokić-Cvetković, Radica and Andrić, Ljubiša and Ceganjac, Zoran and Trumbulović, Ljiljana",
year = "2019",
abstract = "This paper examines the possibility of using basalt-based glass ceramics for construction of structural parts of equipment in metallurgy and mining. An ultrasonic vibration method with a stationary sample pursuant to the ASTM G32 standard was used to evaluate the possibility of the glass ceramic samples application in such operating conditions. As the starting material for synthesis of samples, olivine-pyroxene basalt from the locality Vrelo-Kopaonik Mountain (Serbia) was used. In order to obtain pre-determined structure and properties of basalt-based glass ceramics, raw material preparation methods through the sample crushing, grinding, and mechanical activation processes have been examined together with sample synthesis by means of melting, casting, and thermal treatment applied for the samples concerned. The mass loss of samples in function of the cavitation time was monitored. Sample surface degradation level was quantified using the image analysis. During the test, changes in sample morphology were monitored by means of the scanning electronic microscopy method. The results showed that basalt-based glass ceramics are highly resistant to cavitation wear and can be used in similar exploitation conditions as a substitute for other metal materials.",
publisher = "MDPI, Basel",
journal = "Materials",
title = "Cavitation Wear of Basalt-Based Glass Ceramic",
number = "9",
volume = "12",
doi = "10.3390/ma12091552"
}

Pavlović, M., Dojčinović, M., Prokić-Cvetković, R., Andrić, L., Ceganjac, Z.,& Trumbulović, L.. (2019). Cavitation Wear of Basalt-Based Glass Ceramic. in Materials
MDPI, Basel., 12(9).
https://doi.org/10.3390/ma12091552

Pavlović M, Dojčinović M, Prokić-Cvetković R, Andrić L, Ceganjac Z, Trumbulović L. Cavitation Wear of Basalt-Based Glass Ceramic. in Materials. 2019;12(9).
doi:10.3390/ma12091552 .

Pavlović, Marko, Dojčinović, Marina, Prokić-Cvetković, Radica, Andrić, Ljubiša, Ceganjac, Zoran, Trumbulović, Ljiljana, "Cavitation Wear of Basalt-Based Glass Ceramic" in Materials, 12, no. 9 (2019),
https://doi.org/10.3390/ma12091552 . .

TY  - JOUR
AU  - Pavlović, Marko
AU  - Dojčinović, Marina
AU  - Prokić-Cvetković, Radica
AU  - Andrić, Ljubiša
PY  - 2019
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/3150
AB  - U radu je ispitivana otpornost na dejstvo kavitacije uzoraka livenog bazalta. Uzorci su dobijeni topljenjem, livenjem i termičkim tretmanom izdrobljenih bazaltnih stena iz ležišta Vrelo Kopaonik. Eksperiment je vođen primenom ultrazvučne vibracione metode sa stacionarnim uzorkom prema standardu ASTM G-32. Za procenu otpornosti na dejstvo kavitacije praćena je promena mase uzoraka u funkciji vremena delovanja kavitacije. Nastajanje i razvoj oštećenja pod dejstvom kavitacije praćeni su skening elektronskim mikroskopom, a nivo degradacije površine uzoraka kvantifikovan je primenom analize slike. Rezultati su pokazali visok stepen otpornosti na dejstvo kavitacije uzoraka livenog bazalta, sa kavitacionom brzinom 0,0294 mg/min. To ukazuje na mogućnost njihove primene za izradu izvesnih konstrukcionih delova opreme za primenu u metalurgiji, kao zamena za metalne materijale.
AB  - The paper examines the cavitation resistance of the cast basalt samples. Samples were obtained by melting, casting and thermal treatment of crushed basalt rocks from the Vrelo Kopaonik deposit. The experiment was conducted using an ultrasonic vibration method with a stationary sample according to the ASTM G-32 standard. To estimation the cavitation resistance, a change in the mass of the samples in the function of the cavitation time has been observed. The formation and development of damage under the effect of cavitation was monitored by an electron microscope, and the level of degradation of the sample surface was quantified using the image analysis. The results showed a high degree of cavitation resistance of cast basalt samples, with a cavitation rate of 0.0294 mg/min. This indicates the possibility of their application for the production of particular structural parts of equipment for use in metallurgy, as a substitute for metallic materials.
PB  - Inženjersko društvo za koroziju, Beograd
T2  - Zaštita materijala
T1  - Nastajanje i razvoj oštećenja bazalta pod dejstvom kavitacije
T1  - Formation and development of damage of basalt under the effect of cavitation
EP  - 189
IS  - 2
SP  - 182
VL  - 60
DO  - 10.5937/zasmat1902182P
ER  - 

@article{
author = "Pavlović, Marko and Dojčinović, Marina and Prokić-Cvetković, Radica and Andrić, Ljubiša",
year = "2019",
abstract = "U radu je ispitivana otpornost na dejstvo kavitacije uzoraka livenog bazalta. Uzorci su dobijeni topljenjem, livenjem i termičkim tretmanom izdrobljenih bazaltnih stena iz ležišta Vrelo Kopaonik. Eksperiment je vođen primenom ultrazvučne vibracione metode sa stacionarnim uzorkom prema standardu ASTM G-32. Za procenu otpornosti na dejstvo kavitacije praćena je promena mase uzoraka u funkciji vremena delovanja kavitacije. Nastajanje i razvoj oštećenja pod dejstvom kavitacije praćeni su skening elektronskim mikroskopom, a nivo degradacije površine uzoraka kvantifikovan je primenom analize slike. Rezultati su pokazali visok stepen otpornosti na dejstvo kavitacije uzoraka livenog bazalta, sa kavitacionom brzinom 0,0294 mg/min. To ukazuje na mogućnost njihove primene za izradu izvesnih konstrukcionih delova opreme za primenu u metalurgiji, kao zamena za metalne materijale., The paper examines the cavitation resistance of the cast basalt samples. Samples were obtained by melting, casting and thermal treatment of crushed basalt rocks from the Vrelo Kopaonik deposit. The experiment was conducted using an ultrasonic vibration method with a stationary sample according to the ASTM G-32 standard. To estimation the cavitation resistance, a change in the mass of the samples in the function of the cavitation time has been observed. The formation and development of damage under the effect of cavitation was monitored by an electron microscope, and the level of degradation of the sample surface was quantified using the image analysis. The results showed a high degree of cavitation resistance of cast basalt samples, with a cavitation rate of 0.0294 mg/min. This indicates the possibility of their application for the production of particular structural parts of equipment for use in metallurgy, as a substitute for metallic materials.",
publisher = "Inženjersko društvo za koroziju, Beograd",
journal = "Zaštita materijala",
title = "Nastajanje i razvoj oštećenja bazalta pod dejstvom kavitacije, Formation and development of damage of basalt under the effect of cavitation",
pages = "189-182",
number = "2",
volume = "60",
doi = "10.5937/zasmat1902182P"
}

Pavlović, M., Dojčinović, M., Prokić-Cvetković, R.,& Andrić, L.. (2019). Nastajanje i razvoj oštećenja bazalta pod dejstvom kavitacije. in Zaštita materijala
Inženjersko društvo za koroziju, Beograd., 60(2), 182-189.
https://doi.org/10.5937/zasmat1902182P

Pavlović M, Dojčinović M, Prokić-Cvetković R, Andrić L. Nastajanje i razvoj oštećenja bazalta pod dejstvom kavitacije. in Zaštita materijala. 2019;60(2):182-189.
doi:10.5937/zasmat1902182P .

Pavlović, Marko, Dojčinović, Marina, Prokić-Cvetković, Radica, Andrić, Ljubiša, "Nastajanje i razvoj oštećenja bazalta pod dejstvom kavitacije" in Zaštita materijala, 60, no. 2 (2019):182-189,
https://doi.org/10.5937/zasmat1902182P . .

TY  - JOUR
AU  - Pavlović, Marko
AU  - Dojčinović, Marina
AU  - Prokić-Cvetković, Radica
AU  - Andrić, Ljubiša
PY  - 2019
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/3166
AB  - The paper presents the results of research on cavitation resistance of the composite based on unsaturated polyester resin and basalt powder, as reinforcement. Basalt powder was obtained by grinding and micronising basaltic rocks from the Vrelo-Kopaonik deposit. Different amounts of basalt powder as reinforcement were applied (g): 0.15; 0.30; 045; 0,50. The mechanical properties (tensile strength, bending strength, hardness) and cavitation resistance properties were determined for the resulting composite. An ultrasonic vibration method (with stationary specimen) was applied according to ASTM G32 standard. Studies have shown that the mechanical properties and cavitation resistance of the composites increase with the addition of basalt powder as reinforcement.
PB  - Institut za ispitivanje materijala, Beograd
T2  - Structural Integrity and Life
T1  - Cavitation resistance of composite polyester resin/basalt powder
EP  - 22
IS  - 1
SP  - 19
VL  - 19
UR  - https://hdl.handle.net/21.15107/rcub_technorep_4207
ER  - 

@article{
author = "Pavlović, Marko and Dojčinović, Marina and Prokić-Cvetković, Radica and Andrić, Ljubiša",
year = "2019",
abstract = "The paper presents the results of research on cavitation resistance of the composite based on unsaturated polyester resin and basalt powder, as reinforcement. Basalt powder was obtained by grinding and micronising basaltic rocks from the Vrelo-Kopaonik deposit. Different amounts of basalt powder as reinforcement were applied (g): 0.15; 0.30; 045; 0,50. The mechanical properties (tensile strength, bending strength, hardness) and cavitation resistance properties were determined for the resulting composite. An ultrasonic vibration method (with stationary specimen) was applied according to ASTM G32 standard. Studies have shown that the mechanical properties and cavitation resistance of the composites increase with the addition of basalt powder as reinforcement.",
publisher = "Institut za ispitivanje materijala, Beograd",
journal = "Structural Integrity and Life",
title = "Cavitation resistance of composite polyester resin/basalt powder",
pages = "22-19",
number = "1",
volume = "19",
url = "https://hdl.handle.net/21.15107/rcub_technorep_4207"
}

Pavlović, M., Dojčinović, M., Prokić-Cvetković, R.,& Andrić, L.. (2019). Cavitation resistance of composite polyester resin/basalt powder. in Structural Integrity and Life
Institut za ispitivanje materijala, Beograd., 19(1), 19-22.
https://hdl.handle.net/21.15107/rcub_technorep_4207

Pavlović M, Dojčinović M, Prokić-Cvetković R, Andrić L. Cavitation resistance of composite polyester resin/basalt powder. in Structural Integrity and Life. 2019;19(1):19-22.
https://hdl.handle.net/21.15107/rcub_technorep_4207 .

Pavlović, Marko, Dojčinović, Marina, Prokić-Cvetković, Radica, Andrić, Ljubiša, "Cavitation resistance of composite polyester resin/basalt powder" in Structural Integrity and Life, 19, no. 1 (2019):19-22,
https://hdl.handle.net/21.15107/rcub_technorep_4207 .

TY  - JOUR
AU  - Pavlović, Marko
AU  - Dojčinović, Marina
AU  - Prokić-Cvetković, Radica
AU  - Andrić, Ljubiša
PY  - 2019
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/3236
AB  - The paper analyzes the morphology of cavitation damage of raw and sintered basalt samples. The experiment was conducted using the ultrasonic vibratory cavitation test method according to the ASTM G-32 standard. During the determination of the resistance to the effect of cavitation, a change in the mass of samples was observed in the function of the cavitation time of operation. The morphology of damage caused by the effect of cavitation was followed by scanning with an electron microscope, and the level of degradation of the surface of the samples was quantified using the image analysis. The results showed a significantly higher degree of resistance of sintered basalt, with a cavitation rate of 0.019 mg/min relative to raw basalt, with a cavitation rate of 0.738 mg/min. After 120 minutes of exposure to the cavitation effect, a smaller number of small pits on the surface of sintered basalt were observed, while a higher level of damage to the surface with the appearance of numerous pits was found in raw basalt, which can be connected in some places to larger and deeper pits in some places. The obtained results indicate the possibility of using sintered basalt for the production of parts that will be exposed to the effects of high cavitation loads.
PB  - Međunarodni Institut za nauku o sinterovanju, Beograd
T2  - Science of Sintering
T1  - The Mechanisms of Cavitation Erosion of Raw and Sintered Basalt
EP  - 419
IS  - 4
SP  - 409
VL  - 51
DO  - 10.2298/SOS1904409P
ER  - 

@article{
author = "Pavlović, Marko and Dojčinović, Marina and Prokić-Cvetković, Radica and Andrić, Ljubiša",
year = "2019",
abstract = "The paper analyzes the morphology of cavitation damage of raw and sintered basalt samples. The experiment was conducted using the ultrasonic vibratory cavitation test method according to the ASTM G-32 standard. During the determination of the resistance to the effect of cavitation, a change in the mass of samples was observed in the function of the cavitation time of operation. The morphology of damage caused by the effect of cavitation was followed by scanning with an electron microscope, and the level of degradation of the surface of the samples was quantified using the image analysis. The results showed a significantly higher degree of resistance of sintered basalt, with a cavitation rate of 0.019 mg/min relative to raw basalt, with a cavitation rate of 0.738 mg/min. After 120 minutes of exposure to the cavitation effect, a smaller number of small pits on the surface of sintered basalt were observed, while a higher level of damage to the surface with the appearance of numerous pits was found in raw basalt, which can be connected in some places to larger and deeper pits in some places. The obtained results indicate the possibility of using sintered basalt for the production of parts that will be exposed to the effects of high cavitation loads.",
publisher = "Međunarodni Institut za nauku o sinterovanju, Beograd",
journal = "Science of Sintering",
title = "The Mechanisms of Cavitation Erosion of Raw and Sintered Basalt",
pages = "419-409",
number = "4",
volume = "51",
doi = "10.2298/SOS1904409P"
}

Pavlović, M., Dojčinović, M., Prokić-Cvetković, R.,& Andrić, L.. (2019). The Mechanisms of Cavitation Erosion of Raw and Sintered Basalt. in Science of Sintering
Međunarodni Institut za nauku o sinterovanju, Beograd., 51(4), 409-419.
https://doi.org/10.2298/SOS1904409P

Pavlović M, Dojčinović M, Prokić-Cvetković R, Andrić L. The Mechanisms of Cavitation Erosion of Raw and Sintered Basalt. in Science of Sintering. 2019;51(4):409-419.
doi:10.2298/SOS1904409P .

Pavlović, Marko, Dojčinović, Marina, Prokić-Cvetković, Radica, Andrić, Ljubiša, "The Mechanisms of Cavitation Erosion of Raw and Sintered Basalt" in Science of Sintering, 51, no. 4 (2019):409-419,
https://doi.org/10.2298/SOS1904409P . .

TY  - CONF
AU  - Arsić, Miodrag
AU  - Bošnjak, Srđan
AU  - Grabulov, Vencislav
AU  - Arsić, Dušan
AU  - Savić, Zoran
PY  - 2019
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/5237
AB  - During the rehabilitation of turbine and hydromechanical equipment at hydro power plant 'Djerdap 1' results of tests and researches carried out in order to analyze the condition of vital components and structures during service led to the conclusion that the components and structures could be made only if parameters of fracture mechanics were applied during the design and prototyping phase, because by doing so the occurrence of fatigue fracture and/or degradation of parent material and welded joints due to variable loading, corrosion, erosion and cavitation would be prevented, therefore the integrity of material would be maintained. Experimental determination of the fatigue crack propagation rate as an important property of development of the fatigue process during the action of the variable load, from the initial to the critical length, enables the prediction of the stable crack propagation period, or in other words of the service life of vital components and structures of turbine and hydromechanical equipment. Taking into account the fact that cracks are most severe of all defects, the results obtained for cracks could safely be applied for other types of defects which often occur in welded joints. This
paper contains the methodological approaches for the assessment of integrity and evaluation of service life of components and structures of turbine and hydromechanical equipment during the design, prototyping and service period based on history of fatigue loading and application of fracture mechanics parameters.
PB  - University of Banja Luka-Faculty of Mechanical Engineering
C3  - Proceedings of the 14th International conference on accomplishments in mechanical and industrial engineering „DEMI 2019”
T1  - Prediction of service life of components and structures of hydro power plants during the design, prototyping and service period
EP  - 188
SP  - 183
UR  - https://hdl.handle.net/21.15107/rcub_machinery_5237
ER  - 

@conference{
author = "Arsić, Miodrag and Bošnjak, Srđan and Grabulov, Vencislav and Arsić, Dušan and Savić, Zoran",
year = "2019",
abstract = "During the rehabilitation of turbine and hydromechanical equipment at hydro power plant 'Djerdap 1' results of tests and researches carried out in order to analyze the condition of vital components and structures during service led to the conclusion that the components and structures could be made only if parameters of fracture mechanics were applied during the design and prototyping phase, because by doing so the occurrence of fatigue fracture and/or degradation of parent material and welded joints due to variable loading, corrosion, erosion and cavitation would be prevented, therefore the integrity of material would be maintained. Experimental determination of the fatigue crack propagation rate as an important property of development of the fatigue process during the action of the variable load, from the initial to the critical length, enables the prediction of the stable crack propagation period, or in other words of the service life of vital components and structures of turbine and hydromechanical equipment. Taking into account the fact that cracks are most severe of all defects, the results obtained for cracks could safely be applied for other types of defects which often occur in welded joints. This
paper contains the methodological approaches for the assessment of integrity and evaluation of service life of components and structures of turbine and hydromechanical equipment during the design, prototyping and service period based on history of fatigue loading and application of fracture mechanics parameters.",
publisher = "University of Banja Luka-Faculty of Mechanical Engineering",
journal = "Proceedings of the 14th International conference on accomplishments in mechanical and industrial engineering „DEMI 2019”",
title = "Prediction of service life of components and structures of hydro power plants during the design, prototyping and service period",
pages = "188-183",
url = "https://hdl.handle.net/21.15107/rcub_machinery_5237"
}

Arsić, M., Bošnjak, S., Grabulov, V., Arsić, D.,& Savić, Z.. (2019). Prediction of service life of components and structures of hydro power plants during the design, prototyping and service period. in Proceedings of the 14th International conference on accomplishments in mechanical and industrial engineering „DEMI 2019”
University of Banja Luka-Faculty of Mechanical Engineering., 183-188.
https://hdl.handle.net/21.15107/rcub_machinery_5237

Arsić M, Bošnjak S, Grabulov V, Arsić D, Savić Z. Prediction of service life of components and structures of hydro power plants during the design, prototyping and service period. in Proceedings of the 14th International conference on accomplishments in mechanical and industrial engineering „DEMI 2019”. 2019;:183-188.
https://hdl.handle.net/21.15107/rcub_machinery_5237 .

Arsić, Miodrag, Bošnjak, Srđan, Grabulov, Vencislav, Arsić, Dušan, Savić, Zoran, "Prediction of service life of components and structures of hydro power plants during the design, prototyping and service period" in Proceedings of the 14th International conference on accomplishments in mechanical and industrial engineering „DEMI 2019” (2019):183-188,
https://hdl.handle.net/21.15107/rcub_machinery_5237 .

TY  - JOUR
AU  - Joksimović, Aleksandra
AU  - Veg, Emil
AU  - Simonović, Vojislav
AU  - Regodić, Mladen
AU  - Šiniković, Goran
AU  - Gubeljak, Nenad
PY  - 2019
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/3093
AB  - 3D modeliranje u SolidWorks-u se predaje na Mašinskom fakultetu Univerziteta u Beogradu (Srbija) više od jedne decenije. Kao i svaka nova veština koju treba savladati, softverski paket SolidWorks zahteva dobro prilagođenu metodologiju podučavanja. Najbolji mogući način podučavanja bio bi individualni mentorski rad. Jedan profesor po studentu, koji bi bio apsolutno fokusiran na završetak zadatka studenta, i pružio najbolje rezultate . Nažalost, zbog nedostatka nastavnog osoblja i velikog broja studenata, ovaj pristup nije moguć. Umesto toga, jedan profesor bi predstavio zadatak iz 3D modeliranja grupi od 80 studenata. Oni bi pratili celokupnu prezentaciju i tek kada se završi celokupna prezentacija, studenti bi se podelili u četiri učionice sa po 20 računara i vežbali predstavljene zadatke. Tokom poslednje decenije primećeno je nekoliko velikih problema u ovim nastavnim metodama. Primenjen je novi pristup nastavi. Ovaj rad predstavlja novu metodologiju nastave i postignute rezultate u poboljšanju nastavnog procesa.
AB  - More than one decade 3D modeling in SolidWorks is taught at the Faculty of Mechanical Engineering at the University of Belgrade (Serbia). As every new skill that has to be mastered, SolidWorks software package demands well-tailored teaching methodology. The best possible way of teaching would be one-on-one tutoring. One teacher per student, who would be absolutely focused on student's task completion, would provide the best results. Unfortunately, due to the lack of teaching staff and vast number of students this approach isn't possible. Instead, one teacher would present the 3D modeling task of interest on the video presenter to a group of 80 students. They would follow the whole presentation and only when the whole presentation ends, students would split into four classrooms with 20 computers each, and practice the presented tasks. During the last decade few major problems in these teaching methods were recognized. A new teaching approach was implemented. This paper presents a novel teaching methodology and achieved results in the teaching process improvement.
PB  - Univerzitet u Beogradu - Mašinski fakultet, Beograd
T2  - FME Transactions
T1  - Implementacija pristupa obrnute učionice u kursu 3D modeliranja
T1  - Implementation of inverted classroom methodology in 3D modeling course
EP  - 315
IS  - 2
SP  - 310
VL  - 47
DO  - 10.5937/fmet1902310J
ER  - 

@article{
author = "Joksimović, Aleksandra and Veg, Emil and Simonović, Vojislav and Regodić, Mladen and Šiniković, Goran and Gubeljak, Nenad",
year = "2019",
abstract = "3D modeliranje u SolidWorks-u se predaje na Mašinskom fakultetu Univerziteta u Beogradu (Srbija) više od jedne decenije. Kao i svaka nova veština koju treba savladati, softverski paket SolidWorks zahteva dobro prilagođenu metodologiju podučavanja. Najbolji mogući način podučavanja bio bi individualni mentorski rad. Jedan profesor po studentu, koji bi bio apsolutno fokusiran na završetak zadatka studenta, i pružio najbolje rezultate . Nažalost, zbog nedostatka nastavnog osoblja i velikog broja studenata, ovaj pristup nije moguć. Umesto toga, jedan profesor bi predstavio zadatak iz 3D modeliranja grupi od 80 studenata. Oni bi pratili celokupnu prezentaciju i tek kada se završi celokupna prezentacija, studenti bi se podelili u četiri učionice sa po 20 računara i vežbali predstavljene zadatke. Tokom poslednje decenije primećeno je nekoliko velikih problema u ovim nastavnim metodama. Primenjen je novi pristup nastavi. Ovaj rad predstavlja novu metodologiju nastave i postignute rezultate u poboljšanju nastavnog procesa., More than one decade 3D modeling in SolidWorks is taught at the Faculty of Mechanical Engineering at the University of Belgrade (Serbia). As every new skill that has to be mastered, SolidWorks software package demands well-tailored teaching methodology. The best possible way of teaching would be one-on-one tutoring. One teacher per student, who would be absolutely focused on student's task completion, would provide the best results. Unfortunately, due to the lack of teaching staff and vast number of students this approach isn't possible. Instead, one teacher would present the 3D modeling task of interest on the video presenter to a group of 80 students. They would follow the whole presentation and only when the whole presentation ends, students would split into four classrooms with 20 computers each, and practice the presented tasks. During the last decade few major problems in these teaching methods were recognized. A new teaching approach was implemented. This paper presents a novel teaching methodology and achieved results in the teaching process improvement.",
publisher = "Univerzitet u Beogradu - Mašinski fakultet, Beograd",
journal = "FME Transactions",
title = "Implementacija pristupa obrnute učionice u kursu 3D modeliranja, Implementation of inverted classroom methodology in 3D modeling course",
pages = "315-310",
number = "2",
volume = "47",
doi = "10.5937/fmet1902310J"
}

Joksimović, A., Veg, E., Simonović, V., Regodić, M., Šiniković, G.,& Gubeljak, N.. (2019). Implementacija pristupa obrnute učionice u kursu 3D modeliranja. in FME Transactions
Univerzitet u Beogradu - Mašinski fakultet, Beograd., 47(2), 310-315.
https://doi.org/10.5937/fmet1902310J

Joksimović A, Veg E, Simonović V, Regodić M, Šiniković G, Gubeljak N. Implementacija pristupa obrnute učionice u kursu 3D modeliranja. in FME Transactions. 2019;47(2):310-315.
doi:10.5937/fmet1902310J .

Joksimović, Aleksandra, Veg, Emil, Simonović, Vojislav, Regodić, Mladen, Šiniković, Goran, Gubeljak, Nenad, "Implementacija pristupa obrnute učionice u kursu 3D modeliranja" in FME Transactions, 47, no. 2 (2019):310-315,
https://doi.org/10.5937/fmet1902310J . .

TY  - JOUR
AU  - Arsić, Miodrag
AU  - Bošnjak, Srđan
AU  - Sedmak, Simon
AU  - Vistać, Brane
AU  - Savić, Zoran
PY  - 2019
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/3211
AB  - During the revitalization of the hydroelectric generating station A4 at the hydro power plant 'Djerdap 1', all of its parts are subjected to non-destructive testing. Cracks are detected in cast part of generator rotor hub, in the flange area toward the turbine shaft. Cracks were 10-500 mm long (determined by magnetic particle tests) and 60-100 mm deep (ultrasonic tests). The generator rotor hub is made of cast steel 25L, in accordance with the standard 977-75. The welding/surface welding repair technology in the detected crack zones of the cast part of generator rotor hub includes a large number of details, due to the structural solution and generator rotor function in service. It was also necessary to provide the carefully undertaken activities in order to enable safe operation and continuous use of the rotor hub. Failing to notice, underestimation or incorrect perception of important details could cause significant problems in hydroelectric generating station operation. The paper, due to specifics of reparation technology, contains arranged preparatory activities for the procedure apart from the welding/surface welding technology. It is of importance to mention a huge amount of money savings, The manufacture of a new generator rotor would cost over 4 million EUR (generator mass is over 300 tonnes), not taking into account the time needed for its making (6-12 months), which is directly related to the amount of energy a hydroelectric generating station can produce during that period. This technology of repair welding is also applicable for other components and structures of the turbine and the hydromechanical equipment subjected to various causes of damage during exploitation.
PB  - Institut za ispitivanje materijala, Beograd
T2  - Structural Integrity and Life
T1  - Repair of cracks detected in cast components of vertical kaplan turbine rotor hub
EP  - 250
IS  - 3
SP  - 243
VL  - 19
UR  - https://hdl.handle.net/21.15107/rcub_machinery_3211
ER  - 

@article{
author = "Arsić, Miodrag and Bošnjak, Srđan and Sedmak, Simon and Vistać, Brane and Savić, Zoran",
year = "2019",
abstract = "During the revitalization of the hydroelectric generating station A4 at the hydro power plant 'Djerdap 1', all of its parts are subjected to non-destructive testing. Cracks are detected in cast part of generator rotor hub, in the flange area toward the turbine shaft. Cracks were 10-500 mm long (determined by magnetic particle tests) and 60-100 mm deep (ultrasonic tests). The generator rotor hub is made of cast steel 25L, in accordance with the standard 977-75. The welding/surface welding repair technology in the detected crack zones of the cast part of generator rotor hub includes a large number of details, due to the structural solution and generator rotor function in service. It was also necessary to provide the carefully undertaken activities in order to enable safe operation and continuous use of the rotor hub. Failing to notice, underestimation or incorrect perception of important details could cause significant problems in hydroelectric generating station operation. The paper, due to specifics of reparation technology, contains arranged preparatory activities for the procedure apart from the welding/surface welding technology. It is of importance to mention a huge amount of money savings, The manufacture of a new generator rotor would cost over 4 million EUR (generator mass is over 300 tonnes), not taking into account the time needed for its making (6-12 months), which is directly related to the amount of energy a hydroelectric generating station can produce during that period. This technology of repair welding is also applicable for other components and structures of the turbine and the hydromechanical equipment subjected to various causes of damage during exploitation.",
publisher = "Institut za ispitivanje materijala, Beograd",
journal = "Structural Integrity and Life",
title = "Repair of cracks detected in cast components of vertical kaplan turbine rotor hub",
pages = "250-243",
number = "3",
volume = "19",
url = "https://hdl.handle.net/21.15107/rcub_machinery_3211"
}

Arsić, M., Bošnjak, S., Sedmak, S., Vistać, B.,& Savić, Z.. (2019). Repair of cracks detected in cast components of vertical kaplan turbine rotor hub. in Structural Integrity and Life
Institut za ispitivanje materijala, Beograd., 19(3), 243-250.
https://hdl.handle.net/21.15107/rcub_machinery_3211

Arsić M, Bošnjak S, Sedmak S, Vistać B, Savić Z. Repair of cracks detected in cast components of vertical kaplan turbine rotor hub. in Structural Integrity and Life. 2019;19(3):243-250.
https://hdl.handle.net/21.15107/rcub_machinery_3211 .

Arsić, Miodrag, Bošnjak, Srđan, Sedmak, Simon, Vistać, Brane, Savić, Zoran, "Repair of cracks detected in cast components of vertical kaplan turbine rotor hub" in Structural Integrity and Life, 19, no. 3 (2019):243-250,
https://hdl.handle.net/21.15107/rcub_machinery_3211 .

TY  - JOUR
AU  - Martinović, Sanja
AU  - Vlahović, Milica
AU  - Dojčinović, Marina
AU  - Pavlović, Marko
AU  - Volkov-Husović, Tatjana
PY  - 2018
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/7444
AB  - In this study the resistance of cordierite and zircon to the cavitation erosion was investigated with the aim of possible spreading their application. Cavitation erosion test was applied using standard ultrasonic vibratory set up with stationary sample. Weight loss and image analysis measurements including morphological analysis of the formed pits were used for monitoring degradation during the cavitation erosion testing. The obtained results were discussed in order to compare and analyze degradation mechanism and the resistance of the investigated materials to cavitation erosion. Cordierite sample underwent less serious degradation, characterized by continual forming of new pits, while zircon degradation progressed by growth and merging of already formed pits.
T2  - Materials Letters
T1  - Comparison 	of cavitation erosion behavior od cordierite and zircon based samples using image and 	morphological analyses
EP  - 139
SP  - 136
VL  - 220
DO  - 10.1016/j.matlet.2018.03.029
ER  - 

@article{
author = "Martinović, Sanja and Vlahović, Milica and Dojčinović, Marina and Pavlović, Marko and Volkov-Husović, Tatjana",
year = "2018",
abstract = "In this study the resistance of cordierite and zircon to the cavitation erosion was investigated with the aim of possible spreading their application. Cavitation erosion test was applied using standard ultrasonic vibratory set up with stationary sample. Weight loss and image analysis measurements including morphological analysis of the formed pits were used for monitoring degradation during the cavitation erosion testing. The obtained results were discussed in order to compare and analyze degradation mechanism and the resistance of the investigated materials to cavitation erosion. Cordierite sample underwent less serious degradation, characterized by continual forming of new pits, while zircon degradation progressed by growth and merging of already formed pits.",
journal = "Materials Letters",
title = "Comparison 	of cavitation erosion behavior od cordierite and zircon based samples using image and 	morphological analyses",
pages = "139-136",
volume = "220",
doi = "10.1016/j.matlet.2018.03.029"
}

Martinović, S., Vlahović, M., Dojčinović, M., Pavlović, M.,& Volkov-Husović, T.. (2018). Comparison 	of cavitation erosion behavior od cordierite and zircon based samples using image and 	morphological analyses. in Materials Letters, 220, 136-139.
https://doi.org/10.1016/j.matlet.2018.03.029

Martinović S, Vlahović M, Dojčinović M, Pavlović M, Volkov-Husović T. Comparison 	of cavitation erosion behavior od cordierite and zircon based samples using image and 	morphological analyses. in Materials Letters. 2018;220:136-139.
doi:10.1016/j.matlet.2018.03.029 .

Martinović, Sanja, Vlahović, Milica, Dojčinović, Marina, Pavlović, Marko, Volkov-Husović, Tatjana, "Comparison 	of cavitation erosion behavior od cordierite and zircon based samples using image and 	morphological analyses" in Materials Letters, 220 (2018):136-139,
https://doi.org/10.1016/j.matlet.2018.03.029 . .

TY  - CONF
AU  - Arsić, Miodrag
AU  - Bošnjak, Srđan
AU  - Grabulov, Vencislav
AU  - Vistać, Brane
AU  - Savić, Zoran
PY  - 2018
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/5297
AB  - Vertical Kaplan turbines were installed in 6 hydroelectric generating sets at "Djerdap 1", nominal power 178 MW, that were made in Russia. During the refurbishment of the hydroelectric generating set Al at the hydro power plant Djerdap 1, experimental non-destructive tests on all of its components were performed in order to determine the state of the turbine as a whole. During the testing the damages and cracks were detected on internal surfaces of cranks and sleeves of guide vane apparatus vanes, which were caused by turbine shaft vibrations. Cranks and sleeves were made of cast steel 25L, in accordance with the standard GOST 977. The repair methodology for damaged internal surfaces of cranks of guide vane apparatus vanes is presented in this paper. It was necessary, due to the structural solution used for the design of cranks and sleeves and their function during exploitation, to define a large number of details, carefully reconsider them and carry out all activities with extreme care in order to enable the safe operation and continuous use of cranks. Overlooking, underestimation or incorrect perception of important details could cause significant problems during turbine operation.
PB  - Macedonian Union of Metallurgists
C3  - VIIIth International Metallurgical Congress
T1  - Repair of damaged surfaces at the vital section of the regulatory mechanism of the hydro turbine guide vane apparatus
EP  - 6
SP  - 1
UR  - https://hdl.handle.net/21.15107/rcub_machinery_5297
ER  - 

@conference{
author = "Arsić, Miodrag and Bošnjak, Srđan and Grabulov, Vencislav and Vistać, Brane and Savić, Zoran",
year = "2018",
abstract = "Vertical Kaplan turbines were installed in 6 hydroelectric generating sets at "Djerdap 1", nominal power 178 MW, that were made in Russia. During the refurbishment of the hydroelectric generating set Al at the hydro power plant Djerdap 1, experimental non-destructive tests on all of its components were performed in order to determine the state of the turbine as a whole. During the testing the damages and cracks were detected on internal surfaces of cranks and sleeves of guide vane apparatus vanes, which were caused by turbine shaft vibrations. Cranks and sleeves were made of cast steel 25L, in accordance with the standard GOST 977. The repair methodology for damaged internal surfaces of cranks of guide vane apparatus vanes is presented in this paper. It was necessary, due to the structural solution used for the design of cranks and sleeves and their function during exploitation, to define a large number of details, carefully reconsider them and carry out all activities with extreme care in order to enable the safe operation and continuous use of cranks. Overlooking, underestimation or incorrect perception of important details could cause significant problems during turbine operation.",
publisher = "Macedonian Union of Metallurgists",
journal = "VIIIth International Metallurgical Congress",
title = "Repair of damaged surfaces at the vital section of the regulatory mechanism of the hydro turbine guide vane apparatus",
pages = "6-1",
url = "https://hdl.handle.net/21.15107/rcub_machinery_5297"
}

Arsić, M., Bošnjak, S., Grabulov, V., Vistać, B.,& Savić, Z.. (2018). Repair of damaged surfaces at the vital section of the regulatory mechanism of the hydro turbine guide vane apparatus. in VIIIth International Metallurgical Congress
Macedonian Union of Metallurgists., 1-6.
https://hdl.handle.net/21.15107/rcub_machinery_5297

Arsić M, Bošnjak S, Grabulov V, Vistać B, Savić Z. Repair of damaged surfaces at the vital section of the regulatory mechanism of the hydro turbine guide vane apparatus. in VIIIth International Metallurgical Congress. 2018;:1-6.
https://hdl.handle.net/21.15107/rcub_machinery_5297 .

Arsić, Miodrag, Bošnjak, Srđan, Grabulov, Vencislav, Vistać, Brane, Savić, Zoran, "Repair of damaged surfaces at the vital section of the regulatory mechanism of the hydro turbine guide vane apparatus" in VIIIth International Metallurgical Congress (2018):1-6,
https://hdl.handle.net/21.15107/rcub_machinery_5297 .

TY  - JOUR
AU  - Međo, Bojan
AU  - Arsić, Miodrag
AU  - Rakin, Marko
AU  - Sedmak, Simon
AU  - Savić, Zoran
PY  - 2018
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/2961
AB  - Vital components of the beam that enable conjoint operation of two bridge cranes are braces and threaded spindle. The beam connects two bridge cranes with overall lifting capacity of 500 t (2 x 250 t) and enables their simultaneous conjoint operation during the rehabilitation or major overhaul of hydroelectric generating set equipment at the hydro power plant ''Djerdap 2'. Two braces are being installed instead of two hooks when this situation occurs. The threaded spindle is loaded with 500 t (5 MN), while braces are loaded with 250 t (2.5 MN) each. Integrity of structures is a relatively new scientific and engineering discipline which in a broader sense comprises condition analysis, behaviour diagnostics, service life evaluation and rehabilitation of structures, which means that beside the usual situation in which it is necessary to evaluate the integrity of a structure when a flaw is detected by means of non-destructive tests, this discipline also comprises stress condition analysis for the crackless structure, most often through the use of finite element method. This is the way to obtain precise and detailed distribution of displacements, deformations and stresses, which enables determination of weak spots on the structure, even before crack initiation. Non-destructive tests are performed in order to analyse the current condition of braces and the threaded spindle. On the basis of performed analytical calculations it is determined that the integrity is not threatened, although some internal non-homogeneities are detected by ultrasonic testing.
PB  - Institut za ispitivanje materijala, Beograd
T2  - Structural Integrity and Life
T1  - Integrity assessment of vital beam components that enable conjoint operation of two bridge cranes
EP  - 59
IS  - 1
SP  - 53
VL  - 18
UR  - https://hdl.handle.net/21.15107/rcub_technorep_3791
ER  - 

@article{
author = "Međo, Bojan and Arsić, Miodrag and Rakin, Marko and Sedmak, Simon and Savić, Zoran",
year = "2018",
abstract = "Vital components of the beam that enable conjoint operation of two bridge cranes are braces and threaded spindle. The beam connects two bridge cranes with overall lifting capacity of 500 t (2 x 250 t) and enables their simultaneous conjoint operation during the rehabilitation or major overhaul of hydroelectric generating set equipment at the hydro power plant ''Djerdap 2'. Two braces are being installed instead of two hooks when this situation occurs. The threaded spindle is loaded with 500 t (5 MN), while braces are loaded with 250 t (2.5 MN) each. Integrity of structures is a relatively new scientific and engineering discipline which in a broader sense comprises condition analysis, behaviour diagnostics, service life evaluation and rehabilitation of structures, which means that beside the usual situation in which it is necessary to evaluate the integrity of a structure when a flaw is detected by means of non-destructive tests, this discipline also comprises stress condition analysis for the crackless structure, most often through the use of finite element method. This is the way to obtain precise and detailed distribution of displacements, deformations and stresses, which enables determination of weak spots on the structure, even before crack initiation. Non-destructive tests are performed in order to analyse the current condition of braces and the threaded spindle. On the basis of performed analytical calculations it is determined that the integrity is not threatened, although some internal non-homogeneities are detected by ultrasonic testing.",
publisher = "Institut za ispitivanje materijala, Beograd",
journal = "Structural Integrity and Life",
title = "Integrity assessment of vital beam components that enable conjoint operation of two bridge cranes",
pages = "59-53",
number = "1",
volume = "18",
url = "https://hdl.handle.net/21.15107/rcub_technorep_3791"
}

Međo, B., Arsić, M., Rakin, M., Sedmak, S.,& Savić, Z.. (2018). Integrity assessment of vital beam components that enable conjoint operation of two bridge cranes. in Structural Integrity and Life
Institut za ispitivanje materijala, Beograd., 18(1), 53-59.
https://hdl.handle.net/21.15107/rcub_technorep_3791

Međo B, Arsić M, Rakin M, Sedmak S, Savić Z. Integrity assessment of vital beam components that enable conjoint operation of two bridge cranes. in Structural Integrity and Life. 2018;18(1):53-59.
https://hdl.handle.net/21.15107/rcub_technorep_3791 .

Međo, Bojan, Arsić, Miodrag, Rakin, Marko, Sedmak, Simon, Savić, Zoran, "Integrity assessment of vital beam components that enable conjoint operation of two bridge cranes" in Structural Integrity and Life, 18, no. 1 (2018):53-59,
https://hdl.handle.net/21.15107/rcub_technorep_3791 .

TY  - JOUR
AU  - Pavlović, Marko
AU  - Dojčinović, Marina
AU  - Martinović, Sanja
AU  - Vlahović, Milica
AU  - Stević, Zoran
AU  - Jovanović, Marina
AU  - Volkov-Husović, Tatjana
PY  - 2017
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/7442
AB  - Mechanical shock of zircon based ceramic induced by cavitation erosion testing was investigated in this study. Several parameters were followed in order to determine level of material degradation during the cavitation erosion testing. Mass loss was taken as a conventional criterion for material degradation, while the level of surface degradation was evaluated by image and thermal imaging analyses. Results show high cavitation resistance of zircon ceramics and their suitability when vigorous cavitation erosion environment is expected.
T2  - Science of Sintering
T1  - Determination of Degradation Level during 	Cavitation Erosion of Zircon 	Based Ceramic
VL  - 49
DO  - 10.2298/SOS1702175P
ER  - 

@article{
author = "Pavlović, Marko and Dojčinović, Marina and Martinović, Sanja and Vlahović, Milica and Stević, Zoran and Jovanović, Marina and Volkov-Husović, Tatjana",
year = "2017",
abstract = "Mechanical shock of zircon based ceramic induced by cavitation erosion testing was investigated in this study. Several parameters were followed in order to determine level of material degradation during the cavitation erosion testing. Mass loss was taken as a conventional criterion for material degradation, while the level of surface degradation was evaluated by image and thermal imaging analyses. Results show high cavitation resistance of zircon ceramics and their suitability when vigorous cavitation erosion environment is expected.",
journal = "Science of Sintering",
title = "Determination of Degradation Level during 	Cavitation Erosion of Zircon 	Based Ceramic",
volume = "49",
doi = "10.2298/SOS1702175P"
}

Pavlović, M., Dojčinović, M., Martinović, S., Vlahović, M., Stević, Z., Jovanović, M.,& Volkov-Husović, T.. (2017). Determination of Degradation Level during 	Cavitation Erosion of Zircon 	Based Ceramic. in Science of Sintering, 49.
https://doi.org/10.2298/SOS1702175P

Pavlović M, Dojčinović M, Martinović S, Vlahović M, Stević Z, Jovanović M, Volkov-Husović T. Determination of Degradation Level during 	Cavitation Erosion of Zircon 	Based Ceramic. in Science of Sintering. 2017;49.
doi:10.2298/SOS1702175P .

Pavlović, Marko, Dojčinović, Marina, Martinović, Sanja, Vlahović, Milica, Stević, Zoran, Jovanović, Marina, Volkov-Husović, Tatjana, "Determination of Degradation Level during 	Cavitation Erosion of Zircon 	Based Ceramic" in Science of Sintering, 49 (2017),
https://doi.org/10.2298/SOS1702175P . .

TY  - JOUR
AU  - Arsić, Miodrag
AU  - Mladenović, M.
AU  - Savić, Zoran
AU  - Bošnjak, Srđan
AU  - Miković, Radovan
PY  - 2017
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/5259
AB  - Vertical Kaplan turbines, with nominal power of 176 A/ITY, manufactured in Russia, have been instal-led in 6 hydroelectric generating units of hydro power plant "Djerdap 1". Turbines were designed for the lifetime of 40 years due to the required structural solution and the inability of performing periodic inspections and state analyses. Welded structure of the upper ring of guide vane apparatus is made by welding four segments made of St 3 steel together, in accordance with standard GOST 977/88. Ring segments were welded by using submerged arc welding (SAW). During the rehabilitation of turbine A6 nondestructive and destructive tests were per formed on parent material and welded joints in order to carry out the state analysis and estimation of level and causes of eventual degradation of the structure of the upper ring of guide vane apparatus at hydro power plant Djerdap I. This paper comprises results of magnetic particle tests and ultrasonic tests per formed on welded jo-ints. By ultrasonic testing it was determined that there is a lack of root penetration in welded joints, as well as lamellar tearing in parent material. Analysis of the causes of parent metal degradation and occurrence of defects in welded joints of the upper ring of guide vane apparatus was carried out on the basis of results of experimental tests.
PB  - Savez energetičara
T2  - Energija (Energija, ekonomija, ekologija)
T1  - State analisys of the upper ring of guide vane apparatus at hydro power plant Djerdap 1 carried out the basis of non destructive tests
EP  - 249
IS  - 1-2
SP  - 245
VL  - 19
UR  - https://hdl.handle.net/21.15107/rcub_machinery_5259
ER  - 

@article{
author = "Arsić, Miodrag and Mladenović, M. and Savić, Zoran and Bošnjak, Srđan and Miković, Radovan",
year = "2017",
abstract = "Vertical Kaplan turbines, with nominal power of 176 A/ITY, manufactured in Russia, have been instal-led in 6 hydroelectric generating units of hydro power plant "Djerdap 1". Turbines were designed for the lifetime of 40 years due to the required structural solution and the inability of performing periodic inspections and state analyses. Welded structure of the upper ring of guide vane apparatus is made by welding four segments made of St 3 steel together, in accordance with standard GOST 977/88. Ring segments were welded by using submerged arc welding (SAW). During the rehabilitation of turbine A6 nondestructive and destructive tests were per formed on parent material and welded joints in order to carry out the state analysis and estimation of level and causes of eventual degradation of the structure of the upper ring of guide vane apparatus at hydro power plant Djerdap I. This paper comprises results of magnetic particle tests and ultrasonic tests per formed on welded jo-ints. By ultrasonic testing it was determined that there is a lack of root penetration in welded joints, as well as lamellar tearing in parent material. Analysis of the causes of parent metal degradation and occurrence of defects in welded joints of the upper ring of guide vane apparatus was carried out on the basis of results of experimental tests.",
publisher = "Savez energetičara",
journal = "Energija (Energija, ekonomija, ekologija)",
title = "State analisys of the upper ring of guide vane apparatus at hydro power plant Djerdap 1 carried out the basis of non destructive tests",
pages = "249-245",
number = "1-2",
volume = "19",
url = "https://hdl.handle.net/21.15107/rcub_machinery_5259"
}

Arsić, M., Mladenović, M., Savić, Z., Bošnjak, S.,& Miković, R.. (2017). State analisys of the upper ring of guide vane apparatus at hydro power plant Djerdap 1 carried out the basis of non destructive tests. in Energija (Energija, ekonomija, ekologija)
Savez energetičara., 19(1-2), 245-249.
https://hdl.handle.net/21.15107/rcub_machinery_5259

Arsić M, Mladenović M, Savić Z, Bošnjak S, Miković R. State analisys of the upper ring of guide vane apparatus at hydro power plant Djerdap 1 carried out the basis of non destructive tests. in Energija (Energija, ekonomija, ekologija). 2017;19(1-2):245-249.
https://hdl.handle.net/21.15107/rcub_machinery_5259 .

Arsić, Miodrag, Mladenović, M., Savić, Zoran, Bošnjak, Srđan, Miković, Radovan, "State analisys of the upper ring of guide vane apparatus at hydro power plant Djerdap 1 carried out the basis of non destructive tests" in Energija (Energija, ekonomija, ekologija), 19, no. 1-2 (2017):245-249,
https://hdl.handle.net/21.15107/rcub_machinery_5259 .

TY  - CONF
AU  - Arsić, Miodrag
AU  - Bošnjak, Srđan
AU  - Grabulov, Vencislav
AU  - Međo, Bojan
AU  - Mladenović, M.
AU  - Savić, Zoran
PY  - 2017
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/5243
AB  - Cold metallization includes the powder or wire application on the cold surface of components
by electric arc, gas, plasma, supersonic, gas-detonation method. It could be applied on all metals except on pure copper, but not on glass and non-metallic materials. Thickness of the layer which is being deposited ranges from 0.05 to 5 mm. Porosity of the layer is 3-15 %. Temperature of the parent material does not exceed 250°C, and therefore it sustains its mechanical properties. Taking into account the above mentioned, for the repair of damaged surfaces of components of turbine and hydromechanical equipment, the methodology of the electric arc technique was developed. At first, research regarding the possibility of application of cold metallization at damaged samples of metal sheets and pipes made of structural steel was carried out, and afterwards the same methodology was performed and confirmed during the repair of damaged surfaces of the flange at the horizontal Kaplan turbine with nominal power of 28 MW (Djerdap 2). Functional role of the flange, made of steel X5CrNi18-10, is to prevent the water from entering the enclosed space of the turbine shaft.
PB  - University of Niš, Faculty of Mechanical Engineering and Society of Thermal Engineers of Serbia
C3  - Proceedings of the 18th  Symposium on Thermal Science and Engineering of Serbia – SIMTERM 2017
T1  - Repair of damaged surfaces of components of turbine and hydromechanical equipment through the use of cold metallization
EP  - 540
SP  - 536
UR  - https://hdl.handle.net/21.15107/rcub_machinery_5243
ER  - 

@conference{
author = "Arsić, Miodrag and Bošnjak, Srđan and Grabulov, Vencislav and Međo, Bojan and Mladenović, M. and Savić, Zoran",
year = "2017",
abstract = "Cold metallization includes the powder or wire application on the cold surface of components
by electric arc, gas, plasma, supersonic, gas-detonation method. It could be applied on all metals except on pure copper, but not on glass and non-metallic materials. Thickness of the layer which is being deposited ranges from 0.05 to 5 mm. Porosity of the layer is 3-15 %. Temperature of the parent material does not exceed 250°C, and therefore it sustains its mechanical properties. Taking into account the above mentioned, for the repair of damaged surfaces of components of turbine and hydromechanical equipment, the methodology of the electric arc technique was developed. At first, research regarding the possibility of application of cold metallization at damaged samples of metal sheets and pipes made of structural steel was carried out, and afterwards the same methodology was performed and confirmed during the repair of damaged surfaces of the flange at the horizontal Kaplan turbine with nominal power of 28 MW (Djerdap 2). Functional role of the flange, made of steel X5CrNi18-10, is to prevent the water from entering the enclosed space of the turbine shaft.",
publisher = "University of Niš, Faculty of Mechanical Engineering and Society of Thermal Engineers of Serbia",
journal = "Proceedings of the 18th  Symposium on Thermal Science and Engineering of Serbia – SIMTERM 2017",
title = "Repair of damaged surfaces of components of turbine and hydromechanical equipment through the use of cold metallization",
pages = "540-536",
url = "https://hdl.handle.net/21.15107/rcub_machinery_5243"
}

Arsić, M., Bošnjak, S., Grabulov, V., Međo, B., Mladenović, M.,& Savić, Z.. (2017). Repair of damaged surfaces of components of turbine and hydromechanical equipment through the use of cold metallization. in Proceedings of the 18th  Symposium on Thermal Science and Engineering of Serbia – SIMTERM 2017
University of Niš, Faculty of Mechanical Engineering and Society of Thermal Engineers of Serbia., 536-540.
https://hdl.handle.net/21.15107/rcub_machinery_5243

Arsić M, Bošnjak S, Grabulov V, Međo B, Mladenović M, Savić Z. Repair of damaged surfaces of components of turbine and hydromechanical equipment through the use of cold metallization. in Proceedings of the 18th  Symposium on Thermal Science and Engineering of Serbia – SIMTERM 2017. 2017;:536-540.
https://hdl.handle.net/21.15107/rcub_machinery_5243 .

Arsić, Miodrag, Bošnjak, Srđan, Grabulov, Vencislav, Međo, Bojan, Mladenović, M., Savić, Zoran, "Repair of damaged surfaces of components of turbine and hydromechanical equipment through the use of cold metallization" in Proceedings of the 18th  Symposium on Thermal Science and Engineering of Serbia – SIMTERM 2017 (2017):536-540,
https://hdl.handle.net/21.15107/rcub_machinery_5243 .

TY  - JOUR
AU  - Younise, Bashir
AU  - Rakin, Marko
AU  - Gubeljak, Nenad
AU  - Međo, Bojan
AU  - Sedmak, Aleksandar
PY  - 2017
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/2585
AB  - The topic of this work is assessment of ductile fracture initiation and development in different zones of welded joint of a high strength low alloyed (HSLA) steel. A combined experimental-numerical procedure is applied for determination of properties of the weld metal and the heat affected zone - HAZ. One tensile specimen with rectangular cross-section is tested, and the surface strains are determined using stereometric 3D measurement (measurement system Gom Aramis with two cameras and software solution). This methodology enabled formation of the stress-strain curves for micromechanical analysis of fracture of specimens with initial fatigue pre-cracks. Two different geometries are considered: standard single-edge notched bend (SENB) specimens and surface-cracked tensile specimens. The cracks were positioned either in weld metal or in HAZ - within the fine-grained part. Micromechanical model (complete Gurson model, by Z.L. Zhang) is applied for assessment of crack growth onset and stable growth. Higher resistance to ductile fracture initiation and crack growth in HAZ is successfully predicted, as well as constraint effect caused by different crack shapes.
PB  - Pergamon-Elsevier Science Ltd, Oxford
T2  - Engineering Failure Analysis
T1  - Effect of material heterogeneity and constraint conditions on ductile fracture resistance of welded joint zones - Micromechanical assessment
EP  - 445
SP  - 435
VL  - 82
DO  - 10.1016/j.engfailanal.2017.08.006
ER  - 

@article{
author = "Younise, Bashir and Rakin, Marko and Gubeljak, Nenad and Međo, Bojan and Sedmak, Aleksandar",
year = "2017",
abstract = "The topic of this work is assessment of ductile fracture initiation and development in different zones of welded joint of a high strength low alloyed (HSLA) steel. A combined experimental-numerical procedure is applied for determination of properties of the weld metal and the heat affected zone - HAZ. One tensile specimen with rectangular cross-section is tested, and the surface strains are determined using stereometric 3D measurement (measurement system Gom Aramis with two cameras and software solution). This methodology enabled formation of the stress-strain curves for micromechanical analysis of fracture of specimens with initial fatigue pre-cracks. Two different geometries are considered: standard single-edge notched bend (SENB) specimens and surface-cracked tensile specimens. The cracks were positioned either in weld metal or in HAZ - within the fine-grained part. Micromechanical model (complete Gurson model, by Z.L. Zhang) is applied for assessment of crack growth onset and stable growth. Higher resistance to ductile fracture initiation and crack growth in HAZ is successfully predicted, as well as constraint effect caused by different crack shapes.",
publisher = "Pergamon-Elsevier Science Ltd, Oxford",
journal = "Engineering Failure Analysis",
title = "Effect of material heterogeneity and constraint conditions on ductile fracture resistance of welded joint zones - Micromechanical assessment",
pages = "445-435",
volume = "82",
doi = "10.1016/j.engfailanal.2017.08.006"
}

Younise, B., Rakin, M., Gubeljak, N., Međo, B.,& Sedmak, A.. (2017). Effect of material heterogeneity and constraint conditions on ductile fracture resistance of welded joint zones - Micromechanical assessment. in Engineering Failure Analysis
Pergamon-Elsevier Science Ltd, Oxford., 82, 435-445.
https://doi.org/10.1016/j.engfailanal.2017.08.006

Younise B, Rakin M, Gubeljak N, Međo B, Sedmak A. Effect of material heterogeneity and constraint conditions on ductile fracture resistance of welded joint zones - Micromechanical assessment. in Engineering Failure Analysis. 2017;82:435-445.
doi:10.1016/j.engfailanal.2017.08.006 .

Younise, Bashir, Rakin, Marko, Gubeljak, Nenad, Međo, Bojan, Sedmak, Aleksandar, "Effect of material heterogeneity and constraint conditions on ductile fracture resistance of welded joint zones - Micromechanical assessment" in Engineering Failure Analysis, 82 (2017):435-445,
https://doi.org/10.1016/j.engfailanal.2017.08.006 . .

TY  - JOUR
AU  - Veg, Emil
AU  - Regodić, Mladen
AU  - Joksimović, Aleksandra
AU  - Gubeljak, Nenad
PY  - 2017
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/2567
AB  - U ovom radu je opisana metodologija 3D modeliranja stuba dalekovoda. Zadatak je bio da se razvije virtualni 3D model, u potpunosti odgovarajući realnoj strukturi, koji će biti podvrgnut strukturalnoj analizi u ANSYS programskom paketu. Proces 3D modeliranja je od suštinskog značaja za ovaj postupak kompijuterske analize. Metoda zahteva precizno definisanje koordinata čvornih tačaka. I to ne samo ključnih čvornih tačaka strukture, nego i tačaka koje će biti važne za buduću analizu napona i deformacija. Ovo znači da osoba koja radi na kreiranju modela treba da bude dobro upoznata sa metodom strukturne analize kako bi unapred predodredila sve tačke koje su od značaja za konstrukciju i za analizu. Težište eksperimenta je određivanje dinamičkog ponašanja strukture izložene poznatom opterećenju. 3D model koji je u korelaciji sa stvarnom konstukcijom, sa potvrđenom geometrijom, statičkim i dinamičkim karakteristikama pruža priliku da se predvidi ponašanje strukture pod opterećenjima koja ne mogu da se primene na stvarne konstrukcije (ekstremna preopterećenja, kompleksna opterećenja i oštri vremenski uslovi).
AB  - This paper describes a methodology for transmission tower 3D modelling. The task was to develop a virtual 3D model, corresponding to the real structure, which will be subjected to structural analysis in ANSYS software. The process of 3D modelling is crucial for this kind of computer analysis. It requires precise key point coordinates defining. Not only the important points of the structure, but also the points of interest for the future structural analysis have to be defined. This means that model developer should be familiar with the structural analysis so he could form adequate key points in advance. The main point of the experiment concept is to determine dynamic behaviour of the structure, exposed to a known load. Truly correlated 3D model, with verified geometric, static and dynamic properties offers the opportunity to predict the structure behaviour under loads that can hardly apply on a living structure (extreme overloads, complex loads, and harsh ambient condition).
PB  - Univerzitet u Beogradu - Mašinski fakultet, Beograd
T2  - FME Transactions
T1  - Razvoj 3D modela stuba dalekovoda za analizu u softverskom paketu ANSYS
T1  - Development of the transmission tower virtual 3D model for structural analysis in ANSYS
EP  - 235
IS  - 2
SP  - 232
VL  - 45
DO  - 10.5937/fmet1702232V
ER  - 

@article{
author = "Veg, Emil and Regodić, Mladen and Joksimović, Aleksandra and Gubeljak, Nenad",
year = "2017",
abstract = "U ovom radu je opisana metodologija 3D modeliranja stuba dalekovoda. Zadatak je bio da se razvije virtualni 3D model, u potpunosti odgovarajući realnoj strukturi, koji će biti podvrgnut strukturalnoj analizi u ANSYS programskom paketu. Proces 3D modeliranja je od suštinskog značaja za ovaj postupak kompijuterske analize. Metoda zahteva precizno definisanje koordinata čvornih tačaka. I to ne samo ključnih čvornih tačaka strukture, nego i tačaka koje će biti važne za buduću analizu napona i deformacija. Ovo znači da osoba koja radi na kreiranju modela treba da bude dobro upoznata sa metodom strukturne analize kako bi unapred predodredila sve tačke koje su od značaja za konstrukciju i za analizu. Težište eksperimenta je određivanje dinamičkog ponašanja strukture izložene poznatom opterećenju. 3D model koji je u korelaciji sa stvarnom konstukcijom, sa potvrđenom geometrijom, statičkim i dinamičkim karakteristikama pruža priliku da se predvidi ponašanje strukture pod opterećenjima koja ne mogu da se primene na stvarne konstrukcije (ekstremna preopterećenja, kompleksna opterećenja i oštri vremenski uslovi)., This paper describes a methodology for transmission tower 3D modelling. The task was to develop a virtual 3D model, corresponding to the real structure, which will be subjected to structural analysis in ANSYS software. The process of 3D modelling is crucial for this kind of computer analysis. It requires precise key point coordinates defining. Not only the important points of the structure, but also the points of interest for the future structural analysis have to be defined. This means that model developer should be familiar with the structural analysis so he could form adequate key points in advance. The main point of the experiment concept is to determine dynamic behaviour of the structure, exposed to a known load. Truly correlated 3D model, with verified geometric, static and dynamic properties offers the opportunity to predict the structure behaviour under loads that can hardly apply on a living structure (extreme overloads, complex loads, and harsh ambient condition).",
publisher = "Univerzitet u Beogradu - Mašinski fakultet, Beograd",
journal = "FME Transactions",
title = "Razvoj 3D modela stuba dalekovoda za analizu u softverskom paketu ANSYS, Development of the transmission tower virtual 3D model for structural analysis in ANSYS",
pages = "235-232",
number = "2",
volume = "45",
doi = "10.5937/fmet1702232V"
}

Veg, E., Regodić, M., Joksimović, A.,& Gubeljak, N.. (2017). Razvoj 3D modela stuba dalekovoda za analizu u softverskom paketu ANSYS. in FME Transactions
Univerzitet u Beogradu - Mašinski fakultet, Beograd., 45(2), 232-235.
https://doi.org/10.5937/fmet1702232V

Veg E, Regodić M, Joksimović A, Gubeljak N. Razvoj 3D modela stuba dalekovoda za analizu u softverskom paketu ANSYS. in FME Transactions. 2017;45(2):232-235.
doi:10.5937/fmet1702232V .

Veg, Emil, Regodić, Mladen, Joksimović, Aleksandra, Gubeljak, Nenad, "Razvoj 3D modela stuba dalekovoda za analizu u softverskom paketu ANSYS" in FME Transactions, 45, no. 2 (2017):232-235,
https://doi.org/10.5937/fmet1702232V . .

TY  - JOUR
AU  - Dojčinović, Marina
AU  - Arsić, Miodrag
AU  - Bošnjak, Srđan
AU  - Murariu, Alin
AU  - Malešević, Zoranka
PY  - 2017
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/2713
AB  - Hydropower plants need to develop means of protection of turbine and hydromechanical equipment from undesirable occurrences, such as degradation of parent material and/or weld metal of parts and structures caused by stresses and unpredictable influence of vibrations, fatigue, corrosion, erosion and cavitation. Results of tests that refer to the cavitation resistance of turbine runner blades made of cast steel 08X15H4 pi M pi, in accordance with GOST standard are presented in this paper. For the testing of cavitation resistance, the ultrasonic vibration test method is used (with the stationary sample), for which it is necessary to measure the mass loss during specified time intervals, while the cavitation resistance of the material is being defined, taking into account the incubation period and cavitation rate. Scanning electron microscope analysis is carried out to study the morphology of sample damage due to cavitation. The obtained results show that the tested steel has a good cavitation resistance and that fatigue is the main failure mechanism.
PB  - Institut za ispitivanje materijala, Beograd
T2  - Structural Integrity and Life
T1  - Cavitation resistance of turbine runner blades at the hydropower plant 'djerdap'
EP  - 60
IS  - 1
SP  - 55
VL  - 17
UR  - https://hdl.handle.net/21.15107/rcub_technorep_3504
ER  - 

@article{
author = "Dojčinović, Marina and Arsić, Miodrag and Bošnjak, Srđan and Murariu, Alin and Malešević, Zoranka",
year = "2017",
abstract = "Hydropower plants need to develop means of protection of turbine and hydromechanical equipment from undesirable occurrences, such as degradation of parent material and/or weld metal of parts and structures caused by stresses and unpredictable influence of vibrations, fatigue, corrosion, erosion and cavitation. Results of tests that refer to the cavitation resistance of turbine runner blades made of cast steel 08X15H4 pi M pi, in accordance with GOST standard are presented in this paper. For the testing of cavitation resistance, the ultrasonic vibration test method is used (with the stationary sample), for which it is necessary to measure the mass loss during specified time intervals, while the cavitation resistance of the material is being defined, taking into account the incubation period and cavitation rate. Scanning electron microscope analysis is carried out to study the morphology of sample damage due to cavitation. The obtained results show that the tested steel has a good cavitation resistance and that fatigue is the main failure mechanism.",
publisher = "Institut za ispitivanje materijala, Beograd",
journal = "Structural Integrity and Life",
title = "Cavitation resistance of turbine runner blades at the hydropower plant 'djerdap'",
pages = "60-55",
number = "1",
volume = "17",
url = "https://hdl.handle.net/21.15107/rcub_technorep_3504"
}

Dojčinović, M., Arsić, M., Bošnjak, S., Murariu, A.,& Malešević, Z.. (2017). Cavitation resistance of turbine runner blades at the hydropower plant 'djerdap'. in Structural Integrity and Life
Institut za ispitivanje materijala, Beograd., 17(1), 55-60.
https://hdl.handle.net/21.15107/rcub_technorep_3504

Dojčinović M, Arsić M, Bošnjak S, Murariu A, Malešević Z. Cavitation resistance of turbine runner blades at the hydropower plant 'djerdap'. in Structural Integrity and Life. 2017;17(1):55-60.
https://hdl.handle.net/21.15107/rcub_technorep_3504 .

Dojčinović, Marina, Arsić, Miodrag, Bošnjak, Srđan, Murariu, Alin, Malešević, Zoranka, "Cavitation resistance of turbine runner blades at the hydropower plant 'djerdap'" in Structural Integrity and Life, 17, no. 1 (2017):55-60,
https://hdl.handle.net/21.15107/rcub_technorep_3504 .

TY  - JOUR
AU  - Arsić, M.
AU  - Bošnjak, Srđan
AU  - Sedmak, Simon
AU  - Šarkoćević, Živče
AU  - Savić, Zoran
AU  - Radu, Dorin
PY  - 2016
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/2289
AB  - Results of non-destructive testing of the Kaplan turbine runner manhole welded structure are presented, on the basis of which the repair methodology is defined. During repair, the welding technology for elements of the manhole is modified along with the proposal given for the modification of its structural design, because the finite element method calculation proved that the rectangular welded structure of the manhole was significantly better than round welded structure when it comes to integrity and service life.
PB  - Institut za ispitivanje materijala, Beograd
T2  - Structural Integrity and Life
T1  - Determination of damage and repair methodology for the runner manhole of Kaplan turbine at the hydro power plant 'Djerdap 1'
EP  - 153
IS  - 3
SP  - 149
VL  - 16
UR  - https://hdl.handle.net/21.15107/rcub_machinery_2289
ER  - 

@article{
author = "Arsić, M. and Bošnjak, Srđan and Sedmak, Simon and Šarkoćević, Živče and Savić, Zoran and Radu, Dorin",
year = "2016",
abstract = "Results of non-destructive testing of the Kaplan turbine runner manhole welded structure are presented, on the basis of which the repair methodology is defined. During repair, the welding technology for elements of the manhole is modified along with the proposal given for the modification of its structural design, because the finite element method calculation proved that the rectangular welded structure of the manhole was significantly better than round welded structure when it comes to integrity and service life.",
publisher = "Institut za ispitivanje materijala, Beograd",
journal = "Structural Integrity and Life",
title = "Determination of damage and repair methodology for the runner manhole of Kaplan turbine at the hydro power plant 'Djerdap 1'",
pages = "153-149",
number = "3",
volume = "16",
url = "https://hdl.handle.net/21.15107/rcub_machinery_2289"
}

Arsić, M., Bošnjak, S., Sedmak, S., Šarkoćević, Ž., Savić, Z.,& Radu, D.. (2016). Determination of damage and repair methodology for the runner manhole of Kaplan turbine at the hydro power plant 'Djerdap 1'. in Structural Integrity and Life
Institut za ispitivanje materijala, Beograd., 16(3), 149-153.
https://hdl.handle.net/21.15107/rcub_machinery_2289

Arsić M, Bošnjak S, Sedmak S, Šarkoćević Ž, Savić Z, Radu D. Determination of damage and repair methodology for the runner manhole of Kaplan turbine at the hydro power plant 'Djerdap 1'. in Structural Integrity and Life. 2016;16(3):149-153.
https://hdl.handle.net/21.15107/rcub_machinery_2289 .

Arsić, M., Bošnjak, Srđan, Sedmak, Simon, Šarkoćević, Živče, Savić, Zoran, Radu, Dorin, "Determination of damage and repair methodology for the runner manhole of Kaplan turbine at the hydro power plant 'Djerdap 1'" in Structural Integrity and Life, 16, no. 3 (2016):149-153,
https://hdl.handle.net/21.15107/rcub_machinery_2289 .

TY  - JOUR
AU  - Međo, Bojan
AU  - Arsić, M.
AU  - Rakin, Marko
AU  - Sedmak, Simon
AU  - Malešević, Zoranka
AU  - Savić, Zoran
PY  - 2016
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/2386
AB  - Vertical Kaplan turbines with nominal power of 176 MW manufactured in Russia are installed in 6 hydroelectric generating sets at hydro power plant 'Djerdap 1' (Kladovo, Serbia). Most of the components are made of materials in accordance to GOST and ASTM standards. During rehabilitation of hydroelectric generating set, the analysis of the current state and integrity assessment of turbine regulation system pipeline required non-destructive tests on parent material and welded joints between pipes and pipes-elbows. The purpose of the regulation system, comprising of the pipeline for the turbine regulator oil supply, is to open and close vanes of the guide vane apparatus and to regulate the position of runner blades and their number of revolutions. Internal pressure in the regulation system is p = 4 MPa. Structural integrity is a recent scientific and engineering discipline which in broader sense comprises state analysis and behaviour diagnostics, service life assessment and rehabilitation of structures, meaning that beside the usual situation where structural integrity assessment is required when flaws are detected by non-destructive testing, this discipline is also includes stress state analysis. This approach is especially important for welded structures, since cracktype flaws can originate from welding and from unfavourable service conditions. In this paper, the results of non-destructive tests referring to the lack of penetration in roots of butt-welded joints between pipes and pipes-elbows, as well as tensile test results of technical specimens with reinforcements and in specimens with parallel machined sides and standard dimensions, are presented in order to carry out the integrity assessment of the turbine regulation system pipeline of hydroelectric generating set A6 at hydro power plant Djerdap 1. Results of analytical strength calculation of butt-welded joints between 2 pipes, and pipe-elbow with a lack of penetration in the root are also presented.
PB  - Institut za ispitivanje materijala, Beograd
T2  - Structural Integrity and Life
T1  - Integrity assessment of regulation system pipeline elements in hydroelectric generating set a6 of hydro power plant 'djerdap 1'
EP  - 78
IS  - 2
SP  - 71
VL  - 16
UR  - https://hdl.handle.net/21.15107/rcub_technorep_3159
ER  - 

@article{
author = "Međo, Bojan and Arsić, M. and Rakin, Marko and Sedmak, Simon and Malešević, Zoranka and Savić, Zoran",
year = "2016",
abstract = "Vertical Kaplan turbines with nominal power of 176 MW manufactured in Russia are installed in 6 hydroelectric generating sets at hydro power plant 'Djerdap 1' (Kladovo, Serbia). Most of the components are made of materials in accordance to GOST and ASTM standards. During rehabilitation of hydroelectric generating set, the analysis of the current state and integrity assessment of turbine regulation system pipeline required non-destructive tests on parent material and welded joints between pipes and pipes-elbows. The purpose of the regulation system, comprising of the pipeline for the turbine regulator oil supply, is to open and close vanes of the guide vane apparatus and to regulate the position of runner blades and their number of revolutions. Internal pressure in the regulation system is p = 4 MPa. Structural integrity is a recent scientific and engineering discipline which in broader sense comprises state analysis and behaviour diagnostics, service life assessment and rehabilitation of structures, meaning that beside the usual situation where structural integrity assessment is required when flaws are detected by non-destructive testing, this discipline is also includes stress state analysis. This approach is especially important for welded structures, since cracktype flaws can originate from welding and from unfavourable service conditions. In this paper, the results of non-destructive tests referring to the lack of penetration in roots of butt-welded joints between pipes and pipes-elbows, as well as tensile test results of technical specimens with reinforcements and in specimens with parallel machined sides and standard dimensions, are presented in order to carry out the integrity assessment of the turbine regulation system pipeline of hydroelectric generating set A6 at hydro power plant Djerdap 1. Results of analytical strength calculation of butt-welded joints between 2 pipes, and pipe-elbow with a lack of penetration in the root are also presented.",
publisher = "Institut za ispitivanje materijala, Beograd",
journal = "Structural Integrity and Life",
title = "Integrity assessment of regulation system pipeline elements in hydroelectric generating set a6 of hydro power plant 'djerdap 1'",
pages = "78-71",
number = "2",
volume = "16",
url = "https://hdl.handle.net/21.15107/rcub_technorep_3159"
}

Međo, B., Arsić, M., Rakin, M., Sedmak, S., Malešević, Z.,& Savić, Z.. (2016). Integrity assessment of regulation system pipeline elements in hydroelectric generating set a6 of hydro power plant 'djerdap 1'. in Structural Integrity and Life
Institut za ispitivanje materijala, Beograd., 16(2), 71-78.
https://hdl.handle.net/21.15107/rcub_technorep_3159

Međo B, Arsić M, Rakin M, Sedmak S, Malešević Z, Savić Z. Integrity assessment of regulation system pipeline elements in hydroelectric generating set a6 of hydro power plant 'djerdap 1'. in Structural Integrity and Life. 2016;16(2):71-78.
https://hdl.handle.net/21.15107/rcub_technorep_3159 .

Međo, Bojan, Arsić, M., Rakin, Marko, Sedmak, Simon, Malešević, Zoranka, Savić, Zoran, "Integrity assessment of regulation system pipeline elements in hydroelectric generating set a6 of hydro power plant 'djerdap 1'" in Structural Integrity and Life, 16, no. 2 (2016):71-78,
https://hdl.handle.net/21.15107/rcub_technorep_3159 .

TY  - JOUR
AU  - Sedmak, Aleksandar
AU  - Bošnjak, Srđan
AU  - Arsić, M.
AU  - Sedmak, Simon
AU  - Savić, Zoran
PY  - 2016
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/2319
AB  - This paper presents integrity and life estimation of turbine runner cover in a vertical pipe turbines, Kaplan 200 MW nominal output power, produced in Russia, and built in six hydro-generation units of hydroelectric power plant „Đerdap 1” in Serbia. Fatigue and corrosion-fatigue interaction have been taken into account using experimentally obtained material properties, as well as analytical and numerical calculations of stress state, to estimate appropriate safety factors. Fatigue crack growth rate, da/dN, was also calculated, indicated that internal defects of circular or elliptical shape, found out by ultrasonic testing, do not affect reliable operation of runner cover.
PB  - Gruppo Italiano Frattura
T2  - Frattura ed Integrita Strutturale
T1  - Integrity and life estimation of turbine runner cover in a hydro power plant
EP  - 68
IS  - 36
SP  - 63
VL  - 10
DO  - 10.3221/IGF-ESIS.36.07
ER  - 

@article{
author = "Sedmak, Aleksandar and Bošnjak, Srđan and Arsić, M. and Sedmak, Simon and Savić, Zoran",
year = "2016",
abstract = "This paper presents integrity and life estimation of turbine runner cover in a vertical pipe turbines, Kaplan 200 MW nominal output power, produced in Russia, and built in six hydro-generation units of hydroelectric power plant „Đerdap 1” in Serbia. Fatigue and corrosion-fatigue interaction have been taken into account using experimentally obtained material properties, as well as analytical and numerical calculations of stress state, to estimate appropriate safety factors. Fatigue crack growth rate, da/dN, was also calculated, indicated that internal defects of circular or elliptical shape, found out by ultrasonic testing, do not affect reliable operation of runner cover.",
publisher = "Gruppo Italiano Frattura",
journal = "Frattura ed Integrita Strutturale",
title = "Integrity and life estimation of turbine runner cover in a hydro power plant",
pages = "68-63",
number = "36",
volume = "10",
doi = "10.3221/IGF-ESIS.36.07"
}

Sedmak, A., Bošnjak, S., Arsić, M., Sedmak, S.,& Savić, Z.. (2016). Integrity and life estimation of turbine runner cover in a hydro power plant. in Frattura ed Integrita Strutturale
Gruppo Italiano Frattura., 10(36), 63-68.
https://doi.org/10.3221/IGF-ESIS.36.07

Sedmak A, Bošnjak S, Arsić M, Sedmak S, Savić Z. Integrity and life estimation of turbine runner cover in a hydro power plant. in Frattura ed Integrita Strutturale. 2016;10(36):63-68.
doi:10.3221/IGF-ESIS.36.07 .

Sedmak, Aleksandar, Bošnjak, Srđan, Arsić, M., Sedmak, Simon, Savić, Zoran, "Integrity and life estimation of turbine runner cover in a hydro power plant" in Frattura ed Integrita Strutturale, 10, no. 36 (2016):63-68,
https://doi.org/10.3221/IGF-ESIS.36.07 . .

TY  - JOUR
AU  - Murariu, Alin
AU  - Veljić, Darko
AU  - Barjaktarević, Dragana R.
AU  - Rakin, Marko
AU  - Radović, Nenad A.
AU  - Sedmak, Aleksandar
AU  - Djoković, Jelena M.
PY  - 2016
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/2300
AB  - The heat generated during friction stir welding process depends on plastic deformation of the material and friction between the tool and the material. In this work, heat generation is analysed with respect to the material velocity around the tool in Al alloy Al2024-T351 plate. The slip rate of the tool relative to the workpiece material is related to the frictional heat generated. The material velocity, on the other hand, is related to the heat generated by plastic deformation. During the welding process, the slippage is the most pronounced on the front part of the tool shoulder. Also, it is higher on the retreating side than on the advancing side. Slip rate in the zone around the tool pin has very low values, almost negligible. In this zone, the heat generation from friction is very low, because the material is in paste-like state and subjected to intensive plastic deformation. The material flow velocity around the pin is higher in the zone around the root of the pin. In the radial direction, this quantity increases from the pin to the periphery of the tool shoulder.
PB  - Univerzitet u Beogradu - Institut za nuklearne nauke Vinča, Beograd
T2  - Thermal Science
T1  - Influence of material velocity on heat generation during linear welding stage of friction stir welding
EP  - 1701
IS  - 5
SP  - 1693
VL  - 20
DO  - 10.2298/TSCI150904217M
ER  - 

@article{
author = "Murariu, Alin and Veljić, Darko and Barjaktarević, Dragana R. and Rakin, Marko and Radović, Nenad A. and Sedmak, Aleksandar and Djoković, Jelena M.",
year = "2016",
abstract = "The heat generated during friction stir welding process depends on plastic deformation of the material and friction between the tool and the material. In this work, heat generation is analysed with respect to the material velocity around the tool in Al alloy Al2024-T351 plate. The slip rate of the tool relative to the workpiece material is related to the frictional heat generated. The material velocity, on the other hand, is related to the heat generated by plastic deformation. During the welding process, the slippage is the most pronounced on the front part of the tool shoulder. Also, it is higher on the retreating side than on the advancing side. Slip rate in the zone around the tool pin has very low values, almost negligible. In this zone, the heat generation from friction is very low, because the material is in paste-like state and subjected to intensive plastic deformation. The material flow velocity around the pin is higher in the zone around the root of the pin. In the radial direction, this quantity increases from the pin to the periphery of the tool shoulder.",
publisher = "Univerzitet u Beogradu - Institut za nuklearne nauke Vinča, Beograd",
journal = "Thermal Science",
title = "Influence of material velocity on heat generation during linear welding stage of friction stir welding",
pages = "1701-1693",
number = "5",
volume = "20",
doi = "10.2298/TSCI150904217M"
}

Murariu, A., Veljić, D., Barjaktarević, D. R., Rakin, M., Radović, N. A., Sedmak, A.,& Djoković, J. M.. (2016). Influence of material velocity on heat generation during linear welding stage of friction stir welding. in Thermal Science
Univerzitet u Beogradu - Institut za nuklearne nauke Vinča, Beograd., 20(5), 1693-1701.
https://doi.org/10.2298/TSCI150904217M

Murariu A, Veljić D, Barjaktarević DR, Rakin M, Radović NA, Sedmak A, Djoković JM. Influence of material velocity on heat generation during linear welding stage of friction stir welding. in Thermal Science. 2016;20(5):1693-1701.
doi:10.2298/TSCI150904217M .

Murariu, Alin, Veljić, Darko, Barjaktarević, Dragana R., Rakin, Marko, Radović, Nenad A., Sedmak, Aleksandar, Djoković, Jelena M., "Influence of material velocity on heat generation during linear welding stage of friction stir welding" in Thermal Science, 20, no. 5 (2016):1693-1701,
https://doi.org/10.2298/TSCI150904217M . .

TY  - CONF
AU  - Arsić, Miodrag
AU  - Sedmak, Aleksandar
AU  - Bošnjak, Srđan
AU  - Mladenović, M.
AU  - Savić, Zoran
PY  - 2015
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/5250
AB  - Vertical Kaplan turbines, manufactured in Russia and with nominal power of 200 MW, have been installed in 6 hydroelectric generating units at ’Djerdap 1’. During the refurbishment of hydroelectric generating sets A4, A5 and A6, non-destructive and destructive tests were carried out on parent material and weld metal in order to complete the state analysis and assessment of damage level and causes of damage occurrence at vital structures and components, which showed that the selection of suitable material has a crucial role regarding the safe operation of hydroelectric power plants. This paper contains comparative results of mechanical tests performed in order to obtain mechanical properties of materials used for the fabrication of the upper rings of guide vane apparatus installed in 1973 and made of steel St 3 (GOST 977-88) and those recently made through the use of steel S 235 (EN 10025-2), as well as for turbine covers, made of steels S 355 NL (EN 10025-2) and S 355 NL + Z25 + N (EN 10025-3).
PB  - Faculty of Mechanical Engineering, University of Belgrade
C3  - Proceedings of TEAM 2015, 7th International Scientific and Expert Conference of the International TEAM Society
T1  - Selection of steels for vital structures and turbine components of the hydro power plant ’Djerdap 1’
EP  - 564
SP  - 558
UR  - https://hdl.handle.net/21.15107/rcub_machinery_5250
ER  - 

@conference{
author = "Arsić, Miodrag and Sedmak, Aleksandar and Bošnjak, Srđan and Mladenović, M. and Savić, Zoran",
year = "2015",
abstract = "Vertical Kaplan turbines, manufactured in Russia and with nominal power of 200 MW, have been installed in 6 hydroelectric generating units at ’Djerdap 1’. During the refurbishment of hydroelectric generating sets A4, A5 and A6, non-destructive and destructive tests were carried out on parent material and weld metal in order to complete the state analysis and assessment of damage level and causes of damage occurrence at vital structures and components, which showed that the selection of suitable material has a crucial role regarding the safe operation of hydroelectric power plants. This paper contains comparative results of mechanical tests performed in order to obtain mechanical properties of materials used for the fabrication of the upper rings of guide vane apparatus installed in 1973 and made of steel St 3 (GOST 977-88) and those recently made through the use of steel S 235 (EN 10025-2), as well as for turbine covers, made of steels S 355 NL (EN 10025-2) and S 355 NL + Z25 + N (EN 10025-3).",
publisher = "Faculty of Mechanical Engineering, University of Belgrade",
journal = "Proceedings of TEAM 2015, 7th International Scientific and Expert Conference of the International TEAM Society",
title = "Selection of steels for vital structures and turbine components of the hydro power plant ’Djerdap 1’",
pages = "564-558",
url = "https://hdl.handle.net/21.15107/rcub_machinery_5250"
}

Arsić, M., Sedmak, A., Bošnjak, S., Mladenović, M.,& Savić, Z.. (2015). Selection of steels for vital structures and turbine components of the hydro power plant ’Djerdap 1’. in Proceedings of TEAM 2015, 7th International Scientific and Expert Conference of the International TEAM Society
Faculty of Mechanical Engineering, University of Belgrade., 558-564.
https://hdl.handle.net/21.15107/rcub_machinery_5250

Arsić M, Sedmak A, Bošnjak S, Mladenović M, Savić Z. Selection of steels for vital structures and turbine components of the hydro power plant ’Djerdap 1’. in Proceedings of TEAM 2015, 7th International Scientific and Expert Conference of the International TEAM Society. 2015;:558-564.
https://hdl.handle.net/21.15107/rcub_machinery_5250 .

Arsić, Miodrag, Sedmak, Aleksandar, Bošnjak, Srđan, Mladenović, M., Savić, Zoran, "Selection of steels for vital structures and turbine components of the hydro power plant ’Djerdap 1’" in Proceedings of TEAM 2015, 7th International Scientific and Expert Conference of the International TEAM Society (2015):558-564,
https://hdl.handle.net/21.15107/rcub_machinery_5250 .

TY  - JOUR
AU  - Arsić, Miodrag
AU  - Bošnjak, Srđan
AU  - Grabulov, Vencislav
AU  - Međo, Bojan
AU  - Savić, Zoran
PY  - 2015
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/5262
AB  - The beam connects two bridge cranes with the overall lifting capacity of 500 t (2x250 t) and enables their simultaneous conjoint operation during the refurbishment or capital repair of hydroelectric equi-pment at the hydro power plant "Djerdap 2". Two braces are being installed instead of two hooks when that situation occurs. Braces are loaded with 250 t (2.5 MN) each, while threaded spindle is loaded with 500 t (5 MN). Integrity of structures is a relatively new scientific and engineering discipline which in a broader sense comprises state analysis, behaviour and loosening diagnostics, service life evaluation and refurbi-shment of structures, which means that, beside the usual situation in which it is necessary to evaluate the integrity of a structure when a flaw gets detected by means of non-destructive tests, this discipline also comprises structural stress state analysis. Detection of internal defects by means of ultrasonic testing was performed in order to analyze the state of braces and of the threaded spindle. On the basis of performed analytical calculations it was determined that their integrity would not be jeopardized during the refurbishment or capital repair of hydroelectric equipment at the hydro power plant "Djerdap 2".
PB  - Savez energetičara
T2  - Energija (Energija, ekonomija, ekologija)
T1  - Integrity of beam braces and threaded spindle for conjoint operation of two 5 MN bridge cranes
EP  - 324
IS  - 1-2
SP  - 319
VL  - 17
UR  - https://hdl.handle.net/21.15107/rcub_machinery_5262
ER  - 

@article{
author = "Arsić, Miodrag and Bošnjak, Srđan and Grabulov, Vencislav and Međo, Bojan and Savić, Zoran",
year = "2015",
abstract = "The beam connects two bridge cranes with the overall lifting capacity of 500 t (2x250 t) and enables their simultaneous conjoint operation during the refurbishment or capital repair of hydroelectric equi-pment at the hydro power plant "Djerdap 2". Two braces are being installed instead of two hooks when that situation occurs. Braces are loaded with 250 t (2.5 MN) each, while threaded spindle is loaded with 500 t (5 MN). Integrity of structures is a relatively new scientific and engineering discipline which in a broader sense comprises state analysis, behaviour and loosening diagnostics, service life evaluation and refurbi-shment of structures, which means that, beside the usual situation in which it is necessary to evaluate the integrity of a structure when a flaw gets detected by means of non-destructive tests, this discipline also comprises structural stress state analysis. Detection of internal defects by means of ultrasonic testing was performed in order to analyze the state of braces and of the threaded spindle. On the basis of performed analytical calculations it was determined that their integrity would not be jeopardized during the refurbishment or capital repair of hydroelectric equipment at the hydro power plant "Djerdap 2".",
publisher = "Savez energetičara",
journal = "Energija (Energija, ekonomija, ekologija)",
title = "Integrity of beam braces and threaded spindle for conjoint operation of two 5 MN bridge cranes",
pages = "324-319",
number = "1-2",
volume = "17",
url = "https://hdl.handle.net/21.15107/rcub_machinery_5262"
}

Arsić, M., Bošnjak, S., Grabulov, V., Međo, B.,& Savić, Z.. (2015). Integrity of beam braces and threaded spindle for conjoint operation of two 5 MN bridge cranes. in Energija (Energija, ekonomija, ekologija)
Savez energetičara., 17(1-2), 319-324.
https://hdl.handle.net/21.15107/rcub_machinery_5262

Arsić M, Bošnjak S, Grabulov V, Međo B, Savić Z. Integrity of beam braces and threaded spindle for conjoint operation of two 5 MN bridge cranes. in Energija (Energija, ekonomija, ekologija). 2015;17(1-2):319-324.
https://hdl.handle.net/21.15107/rcub_machinery_5262 .

Arsić, Miodrag, Bošnjak, Srđan, Grabulov, Vencislav, Međo, Bojan, Savić, Zoran, "Integrity of beam braces and threaded spindle for conjoint operation of two 5 MN bridge cranes" in Energija (Energija, ekonomija, ekologija), 17, no. 1-2 (2015):319-324,
https://hdl.handle.net/21.15107/rcub_machinery_5262 .

TY  - JOUR
AU  - Sedmak, Simon
AU  - Arsić, M.
AU  - Bajić, Darko
AU  - Mladenović, Mladen
AU  - Savić, Zoran
PY  - 2015
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/2120
AB  - Presented are results of non-destructive tests performed on the parent material and welded joints of structural parts of a breeches pipe (collar and anchor), and results of destructive tests performed on the parent material of the anchor. Non-destructive testing included visual (VT), mag-netic particle (MT), and ultrasonic testing (UT), while destructive tests included determination of chemical com-position, tensile properties, impact energy and hardness. Based on test results it is established that the major cause for the occurrence of damage in the carrying structure of the breeches pipe no.1 of pipeline III, or in other words, the degradation of anchor parent material and welded joints between the collar and anchor, and between the pipeline and anchor, is in the fact that the breeches pipe started to lean, not on the collar, as specified by design, but on the anchor that could not endure all loads occurring in service.
PB  - Institut za ispitivanje materijala, Beograd
T2  - Structural Integrity and Life
T1  - Analysis of causes of degradation of parent material and weld metal of breeches pipe at hydro power plant 'Perućica'
EP  - 151
IS  - 3
SP  - 147
VL  - 15
UR  - https://hdl.handle.net/21.15107/rcub_machinery_2120
ER  - 

@article{
author = "Sedmak, Simon and Arsić, M. and Bajić, Darko and Mladenović, Mladen and Savić, Zoran",
year = "2015",
abstract = "Presented are results of non-destructive tests performed on the parent material and welded joints of structural parts of a breeches pipe (collar and anchor), and results of destructive tests performed on the parent material of the anchor. Non-destructive testing included visual (VT), mag-netic particle (MT), and ultrasonic testing (UT), while destructive tests included determination of chemical com-position, tensile properties, impact energy and hardness. Based on test results it is established that the major cause for the occurrence of damage in the carrying structure of the breeches pipe no.1 of pipeline III, or in other words, the degradation of anchor parent material and welded joints between the collar and anchor, and between the pipeline and anchor, is in the fact that the breeches pipe started to lean, not on the collar, as specified by design, but on the anchor that could not endure all loads occurring in service.",
publisher = "Institut za ispitivanje materijala, Beograd",
journal = "Structural Integrity and Life",
title = "Analysis of causes of degradation of parent material and weld metal of breeches pipe at hydro power plant 'Perućica'",
pages = "151-147",
number = "3",
volume = "15",
url = "https://hdl.handle.net/21.15107/rcub_machinery_2120"
}

Sedmak, S., Arsić, M., Bajić, D., Mladenović, M.,& Savić, Z.. (2015). Analysis of causes of degradation of parent material and weld metal of breeches pipe at hydro power plant 'Perućica'. in Structural Integrity and Life
Institut za ispitivanje materijala, Beograd., 15(3), 147-151.
https://hdl.handle.net/21.15107/rcub_machinery_2120

Sedmak S, Arsić M, Bajić D, Mladenović M, Savić Z. Analysis of causes of degradation of parent material and weld metal of breeches pipe at hydro power plant 'Perućica'. in Structural Integrity and Life. 2015;15(3):147-151.
https://hdl.handle.net/21.15107/rcub_machinery_2120 .

Sedmak, Simon, Arsić, M., Bajić, Darko, Mladenović, Mladen, Savić, Zoran, "Analysis of causes of degradation of parent material and weld metal of breeches pipe at hydro power plant 'Perućica'" in Structural Integrity and Life, 15, no. 3 (2015):147-151,
https://hdl.handle.net/21.15107/rcub_machinery_2120 .