TY  - JOUR
AU  - Dojčinović, Marina
AU  - Arsić, Miodrag
AU  - Bošnjak, Srđan
AU  - Murariu, Alin
AU  - Malesević, Zoranka
PY  - 2017
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/3504
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  - Society for Structural Integrity and Life, Institute for Material Testing
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 Malesević, 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 = "Society for Structural Integrity and Life, Institute for Material Testing",
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.,& Malesević, Z.. (2017). Cavitation resistance of turbine runner blades at the hydropower plant 'Djerdap'. in Structural Integrity and Life
Society for Structural Integrity and Life, Institute for Material Testing., 17(1), 55-60.
https://hdl.handle.net/21.15107/rcub_technorep_3504

Dojčinović M, Arsić M, Bošnjak S, Murariu A, Malesević 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, Malesević, 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  - Rakin, Marko
AU  - Arsić, Miodrag
AU  - Bošnjak, Srđan
AU  - Gnjatović, Nebojša
AU  - Međo, Bojan
PY  - 2013
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/2449
AB  - In order to reduce the testing costs for structural welded joints and production losses due to excavator standstill, a new method for integrity and reliability assessment of welded joints during exploitation of bucket wheel excavators has been developed. In this paper, a part of non-destructive testing results for the butt welded joints on bucket wheel boom, counterweight boom and discharging boom is presented, prior to the repair of the collapsed bucket wheel excavator SchRs 1760x32/5. It has been in operational mode for 17 years prior to the collapse, in other words it has been subjected to aproximatelly 2 125.000 cycles of variable loading. Hypergeometric distribution has been used for calculation of probability that x welded joints, which comprise n welded joints with defects, would be selected for testing out of overall number of joints Q. The integrity assessment for welded structures of bucket wheel excavators has been performed on the basis of defect analysis and probabilistic assessment of the fatigue crack growth in welded joints. By using this method, the testing costs have been reduced by 70 % through optimized scope of the inspections and time periods between them.
PB  - University of Osijek, Tech Fac, Slavonski Brod
T2  - Tehnicki vjesnik-Technical Gazette
T1  - Integrity assessment of bucket wheel excavator welded structures by using the single selection method
EP  - 816
IS  - 5
SP  - 811
VL  - 20
UR  - https://hdl.handle.net/21.15107/rcub_technorep_2449
ER  - 

@article{
author = "Rakin, Marko and Arsić, Miodrag and Bošnjak, Srđan and Gnjatović, Nebojša and Međo, Bojan",
year = "2013",
abstract = "In order to reduce the testing costs for structural welded joints and production losses due to excavator standstill, a new method for integrity and reliability assessment of welded joints during exploitation of bucket wheel excavators has been developed. In this paper, a part of non-destructive testing results for the butt welded joints on bucket wheel boom, counterweight boom and discharging boom is presented, prior to the repair of the collapsed bucket wheel excavator SchRs 1760x32/5. It has been in operational mode for 17 years prior to the collapse, in other words it has been subjected to aproximatelly 2 125.000 cycles of variable loading. Hypergeometric distribution has been used for calculation of probability that x welded joints, which comprise n welded joints with defects, would be selected for testing out of overall number of joints Q. The integrity assessment for welded structures of bucket wheel excavators has been performed on the basis of defect analysis and probabilistic assessment of the fatigue crack growth in welded joints. By using this method, the testing costs have been reduced by 70 % through optimized scope of the inspections and time periods between them.",
publisher = "University of Osijek, Tech Fac, Slavonski Brod",
journal = "Tehnicki vjesnik-Technical Gazette",
title = "Integrity assessment of bucket wheel excavator welded structures by using the single selection method",
pages = "816-811",
number = "5",
volume = "20",
url = "https://hdl.handle.net/21.15107/rcub_technorep_2449"
}

Rakin, M., Arsić, M., Bošnjak, S., Gnjatović, N.,& Međo, B.. (2013). Integrity assessment of bucket wheel excavator welded structures by using the single selection method. in Tehnicki vjesnik-Technical Gazette
University of Osijek, Tech Fac, Slavonski Brod., 20(5), 811-816.
https://hdl.handle.net/21.15107/rcub_technorep_2449

Rakin M, Arsić M, Bošnjak S, Gnjatović N, Međo B. Integrity assessment of bucket wheel excavator welded structures by using the single selection method. in Tehnicki vjesnik-Technical Gazette. 2013;20(5):811-816.
https://hdl.handle.net/21.15107/rcub_technorep_2449 .

Rakin, Marko, Arsić, Miodrag, Bošnjak, Srđan, Gnjatović, Nebojša, Međo, Bojan, "Integrity assessment of bucket wheel excavator welded structures by using the single selection method" in Tehnicki vjesnik-Technical Gazette, 20, no. 5 (2013):811-816,
https://hdl.handle.net/21.15107/rcub_technorep_2449 .

TY  - JOUR
AU  - Bošnjak, Srđan
AU  - Arsić, Miodrag
AU  - Zrnić, Nenad
AU  - Rakin, Marko
AU  - Pantelić, Milorad P.
PY  - 2011
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/1928
AB  - The bucket wheel boom tie-rods are vital structural parts of the bucket wheel excavators (BWE) Their failures inevitably cause BWE collapse and are followed among other things by a substantial financial loss (millions of E) Non-destructive testing revealed a flaw in the butt welded Joint of the body and eye-plate of the bucket wheel tie-rod Its size exceeds the level allowed by current technical regulations An integrity assessment of the bucket wheel tie-rod has been carried out i e the remaining fatigue life has been determined based on the stress-state characteristics in the welded Joint and defined by experimental research in real working conditions The calculation results show that despite the excessive size of the internal flaw the welded Joint integrity is not compromised During periodical inspections of the welded joint in the past two years (BWE was put into operation in December 2007) changes that could compromise the structural integrity were not observed In this way by using a fail-safe philosophy design a considerable financial saving (ca 1 600 000 (sic)) was achieved while at the same time there was no threat to the worker s safety and life the safety of the machine and the production process in the open pit mine
PB  - Pergamon-Elsevier Science Ltd, Oxford
T2  - Engineering Failure Analysis
T1  - Bucket wheel excavator Integrity assessment of the bucket wheel boom tie-rod welded joint
EP  - 222
IS  - 1
SP  - 212
VL  - 18
DO  - 10.1016/j.engfailanal.2010.09.001
ER  - 

@article{
author = "Bošnjak, Srđan and Arsić, Miodrag and Zrnić, Nenad and Rakin, Marko and Pantelić, Milorad P.",
year = "2011",
abstract = "The bucket wheel boom tie-rods are vital structural parts of the bucket wheel excavators (BWE) Their failures inevitably cause BWE collapse and are followed among other things by a substantial financial loss (millions of E) Non-destructive testing revealed a flaw in the butt welded Joint of the body and eye-plate of the bucket wheel tie-rod Its size exceeds the level allowed by current technical regulations An integrity assessment of the bucket wheel tie-rod has been carried out i e the remaining fatigue life has been determined based on the stress-state characteristics in the welded Joint and defined by experimental research in real working conditions The calculation results show that despite the excessive size of the internal flaw the welded Joint integrity is not compromised During periodical inspections of the welded joint in the past two years (BWE was put into operation in December 2007) changes that could compromise the structural integrity were not observed In this way by using a fail-safe philosophy design a considerable financial saving (ca 1 600 000 (sic)) was achieved while at the same time there was no threat to the worker s safety and life the safety of the machine and the production process in the open pit mine",
publisher = "Pergamon-Elsevier Science Ltd, Oxford",
journal = "Engineering Failure Analysis",
title = "Bucket wheel excavator Integrity assessment of the bucket wheel boom tie-rod welded joint",
pages = "222-212",
number = "1",
volume = "18",
doi = "10.1016/j.engfailanal.2010.09.001"
}

Bošnjak, S., Arsić, M., Zrnić, N., Rakin, M.,& Pantelić, M. P.. (2011). Bucket wheel excavator Integrity assessment of the bucket wheel boom tie-rod welded joint. in Engineering Failure Analysis
Pergamon-Elsevier Science Ltd, Oxford., 18(1), 212-222.
https://doi.org/10.1016/j.engfailanal.2010.09.001

Bošnjak S, Arsić M, Zrnić N, Rakin M, Pantelić MP. Bucket wheel excavator Integrity assessment of the bucket wheel boom tie-rod welded joint. in Engineering Failure Analysis. 2011;18(1):212-222.
doi:10.1016/j.engfailanal.2010.09.001 .

Bošnjak, Srđan, Arsić, Miodrag, Zrnić, Nenad, Rakin, Marko, Pantelić, Milorad P., "Bucket wheel excavator Integrity assessment of the bucket wheel boom tie-rod welded joint" in Engineering Failure Analysis, 18, no. 1 (2011):212-222,
https://doi.org/10.1016/j.engfailanal.2010.09.001 . .

TY  - JOUR
AU  - Putić, Slaviša
AU  - Rakin, Marko
AU  - Bošnjak, Srđan
PY  - 2008
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/1274
AB  - A residual strength degradation model for two orientations of fibers of carbon-epoxy composite is proposed. The model is constructed on the basis of an analysis of a gradual decrease in the residual strength of the composite and an increase in loading cycles. Two groups of specimens were subjected to tensile tests under static and dynamic loading. It was necessary to determine the relationship between static and dynamic properties of the composite to predict the residual strength for different numbers of loading cycles. On the basis of initial experimental results, the values of the parameters obtained by using the model were computed numerically. The statistical distributions of the corresponding ultimate strengths obtained by using the model were compared with the distributions of experimental results, and their good correlation is demonstrated.
PB  - Consultants Bureau/Springer, New York
T2  - Materials Science
T1  - Application of the residual strength degradation model to carbon-epoxy composite
EP  - 450
IS  - 3
SP  - 446
VL  - 44
DO  - 10.1007/s11003-008-9094-y
ER  - 

@article{
author = "Putić, Slaviša and Rakin, Marko and Bošnjak, Srđan",
year = "2008",
abstract = "A residual strength degradation model for two orientations of fibers of carbon-epoxy composite is proposed. The model is constructed on the basis of an analysis of a gradual decrease in the residual strength of the composite and an increase in loading cycles. Two groups of specimens were subjected to tensile tests under static and dynamic loading. It was necessary to determine the relationship between static and dynamic properties of the composite to predict the residual strength for different numbers of loading cycles. On the basis of initial experimental results, the values of the parameters obtained by using the model were computed numerically. The statistical distributions of the corresponding ultimate strengths obtained by using the model were compared with the distributions of experimental results, and their good correlation is demonstrated.",
publisher = "Consultants Bureau/Springer, New York",
journal = "Materials Science",
title = "Application of the residual strength degradation model to carbon-epoxy composite",
pages = "450-446",
number = "3",
volume = "44",
doi = "10.1007/s11003-008-9094-y"
}

Putić, S., Rakin, M.,& Bošnjak, S.. (2008). Application of the residual strength degradation model to carbon-epoxy composite. in Materials Science
Consultants Bureau/Springer, New York., 44(3), 446-450.
https://doi.org/10.1007/s11003-008-9094-y

Putić S, Rakin M, Bošnjak S. Application of the residual strength degradation model to carbon-epoxy composite. in Materials Science. 2008;44(3):446-450.
doi:10.1007/s11003-008-9094-y .

Putić, Slaviša, Rakin, Marko, Bošnjak, Srđan, "Application of the residual strength degradation model to carbon-epoxy composite" in Materials Science, 44, no. 3 (2008):446-450,
https://doi.org/10.1007/s11003-008-9094-y . .

TY  - JOUR
AU  - Putić, Slaviša
AU  - Stamenović, Marina
AU  - Bajčeta, Branislav
AU  - Stajčić, Predrag
AU  - Bošnjak, Srđan
PY  - 2007
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/1151
AB  - The aim of this paper is to present the influence of high and low temperatures on the impact properties glass-epoxy composites. The impact strength an is presented for four different glass-epoxy composite structures at three different temperatures, i.e., at room temperature t=20°C, at an elevated temperature t=+50°C and at a low temperature t=-50°C. Standard mechanical testing was carried out on the composite materials with specific masses of reinforcement of 210 g m-2 and 550 g m-2 and orientations 0°/90° and ±45°. Micromechanical analysis of the failure was performed in order to determine real models and mechanisms of crack and temperature influence on the impact properties. .
AB  - Cilj ovog rada je da prikaže uticaj visokih i niskih temperatura na udarna svojstva stakleno-epoksidnih kompozita. Udarna jačina prikazana je za četiri različite strukture stakleno−epoksidnih kompozita na tri različite temperature, tj. na sobnoj t=20°C, povišenoj t=+50°C i niskoj temperaturi t=-50°C. Standardno mehaničko testiranje obavljeno je za kompozite sa masama ojačanja 210 g m-2 i 550 g m-2 i orjentacije 0°/90° i ±45°. Mikromehanička analiza oštećenja izvedena je sa ciljem da se odrede realni modeli i mehanizmi loma i uticaja temperature na udarna svojstva.
PB  - Serbian Chemical Society, Belgrade
T2  - Journal of the Serbian Chemical Society
T1  - The influence of high and low temperatures on the impact properties of glass-epoxy composites
T1  - Uticaj visokih i niskih temperatura na udarna svojstva stakleno−epoksidnih kompozita
EP  - 722
IS  - 7
SP  - 713
VL  - 72
UR  - https://hdl.handle.net/21.15107/rcub_technorep_1151
ER  - 

@article{
author = "Putić, Slaviša and Stamenović, Marina and Bajčeta, Branislav and Stajčić, Predrag and Bošnjak, Srđan",
year = "2007",
abstract = "The aim of this paper is to present the influence of high and low temperatures on the impact properties glass-epoxy composites. The impact strength an is presented for four different glass-epoxy composite structures at three different temperatures, i.e., at room temperature t=20°C, at an elevated temperature t=+50°C and at a low temperature t=-50°C. Standard mechanical testing was carried out on the composite materials with specific masses of reinforcement of 210 g m-2 and 550 g m-2 and orientations 0°/90° and ±45°. Micromechanical analysis of the failure was performed in order to determine real models and mechanisms of crack and temperature influence on the impact properties. ., Cilj ovog rada je da prikaže uticaj visokih i niskih temperatura na udarna svojstva stakleno-epoksidnih kompozita. Udarna jačina prikazana je za četiri različite strukture stakleno−epoksidnih kompozita na tri različite temperature, tj. na sobnoj t=20°C, povišenoj t=+50°C i niskoj temperaturi t=-50°C. Standardno mehaničko testiranje obavljeno je za kompozite sa masama ojačanja 210 g m-2 i 550 g m-2 i orjentacije 0°/90° i ±45°. Mikromehanička analiza oštećenja izvedena je sa ciljem da se odrede realni modeli i mehanizmi loma i uticaja temperature na udarna svojstva.",
publisher = "Serbian Chemical Society, Belgrade",
journal = "Journal of the Serbian Chemical Society",
title = "The influence of high and low temperatures on the impact properties of glass-epoxy composites, Uticaj visokih i niskih temperatura na udarna svojstva stakleno−epoksidnih kompozita",
pages = "722-713",
number = "7",
volume = "72",
url = "https://hdl.handle.net/21.15107/rcub_technorep_1151"
}

Putić, S., Stamenović, M., Bajčeta, B., Stajčić, P.,& Bošnjak, S.. (2007). The influence of high and low temperatures on the impact properties of glass-epoxy composites. in Journal of the Serbian Chemical Society
Serbian Chemical Society, Belgrade., 72(7), 713-722.
https://hdl.handle.net/21.15107/rcub_technorep_1151

Putić S, Stamenović M, Bajčeta B, Stajčić P, Bošnjak S. The influence of high and low temperatures on the impact properties of glass-epoxy composites. in Journal of the Serbian Chemical Society. 2007;72(7):713-722.
https://hdl.handle.net/21.15107/rcub_technorep_1151 .

Putić, Slaviša, Stamenović, Marina, Bajčeta, Branislav, Stajčić, Predrag, Bošnjak, Srđan, "The influence of high and low temperatures on the impact properties of glass-epoxy composites" in Journal of the Serbian Chemical Society, 72, no. 7 (2007):713-722,
https://hdl.handle.net/21.15107/rcub_technorep_1151 .

TY  - JOUR
AU  - Putić, Slaviša
AU  - Stamenović, Marina
AU  - Stajčić, Predrag
AU  - Bajčeta, Branislav
AU  - Bošnjak, Srđan
PY  - 2006
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/893
AB  - Pipes made of composites glass fiber/epoxy resin are predominantly used in the chemical industry, construction, infrastructure and war technique. The pipes made for this purpose are in their use exposed to static and dynamic loading. Depending on the purpose, the pipes, especially those in complex structures, can be loaded by torsion. In that case, exceeding allowed tensions can cause damages such as cracking the fibers and matrix delamination. These damages can lead to the appearance of cracks on the pipes and in many cases to complete breakage of the pipe. Because of this, it is very important to evaluate composite pipes exposed to torsion and find out in which way the construction is weakened, what actually is the main goal of this paper.
AB  - Dominantnost primene cevi izrađenih od kompozita staklena vlakna/epoksi Smola je prisutna u hemijskoj industriji, građevinarstvu, infrastrukturi i ratnoj tehnici. Cevi izrađene za ovu namenu su u eksplotaciji izložene delovanju kako statičkog tako i dinamičkog opterećenja. U zavisnosti od namene, kompozitne cevi, pogotovo u konstrukcijama složenog cevovoda, mogu biti opterećene na uvijanje. U tom slučaju prekoračenje dopuštenih napona prouzrokuje oštećenja koja se ogledaju u uvijanju i pucanju vlakana, pucanju matrice i raslojavanja (delaminacije). U zavisnosti od načina slaganja vlakana javljaju se različiti modeli oštećenja, odnosno pojave prslina. Zbog toga je vrlo važno dati ocenu ponašanja kompozitne cevi izložene uvijanju odnosno ispitivanjem i analizom na prelomnim površinama doći do zaključaka koji su modeli i mehanizmi koji se pri ovom opterećenju javljaju i kako oni utiče na slabljenje konstrukcije, što i jeste predmet i cilj ovog rada.
PB  - Faculty of Technology, Novi Sad
T2  - Acta periodica technologica
T1  - Investigation method of torsional properties and damages of glass/epoxy composite pipes
T1  - Ispitivanje torzionih svojstava i oštećenja staklo/epoksi kompozitnih cevi
EP  - 106
IS  - 37
SP  - 97
DO  - 10.2298/APT0637097P
ER  - 

@article{
author = "Putić, Slaviša and Stamenović, Marina and Stajčić, Predrag and Bajčeta, Branislav and Bošnjak, Srđan",
year = "2006",
abstract = "Pipes made of composites glass fiber/epoxy resin are predominantly used in the chemical industry, construction, infrastructure and war technique. The pipes made for this purpose are in their use exposed to static and dynamic loading. Depending on the purpose, the pipes, especially those in complex structures, can be loaded by torsion. In that case, exceeding allowed tensions can cause damages such as cracking the fibers and matrix delamination. These damages can lead to the appearance of cracks on the pipes and in many cases to complete breakage of the pipe. Because of this, it is very important to evaluate composite pipes exposed to torsion and find out in which way the construction is weakened, what actually is the main goal of this paper., Dominantnost primene cevi izrađenih od kompozita staklena vlakna/epoksi Smola je prisutna u hemijskoj industriji, građevinarstvu, infrastrukturi i ratnoj tehnici. Cevi izrađene za ovu namenu su u eksplotaciji izložene delovanju kako statičkog tako i dinamičkog opterećenja. U zavisnosti od namene, kompozitne cevi, pogotovo u konstrukcijama složenog cevovoda, mogu biti opterećene na uvijanje. U tom slučaju prekoračenje dopuštenih napona prouzrokuje oštećenja koja se ogledaju u uvijanju i pucanju vlakana, pucanju matrice i raslojavanja (delaminacije). U zavisnosti od načina slaganja vlakana javljaju se različiti modeli oštećenja, odnosno pojave prslina. Zbog toga je vrlo važno dati ocenu ponašanja kompozitne cevi izložene uvijanju odnosno ispitivanjem i analizom na prelomnim površinama doći do zaključaka koji su modeli i mehanizmi koji se pri ovom opterećenju javljaju i kako oni utiče na slabljenje konstrukcije, što i jeste predmet i cilj ovog rada.",
publisher = "Faculty of Technology, Novi Sad",
journal = "Acta periodica technologica",
title = "Investigation method of torsional properties and damages of glass/epoxy composite pipes, Ispitivanje torzionih svojstava i oštećenja staklo/epoksi kompozitnih cevi",
pages = "106-97",
number = "37",
doi = "10.2298/APT0637097P"
}

Putić, S., Stamenović, M., Stajčić, P., Bajčeta, B.,& Bošnjak, S.. (2006). Investigation method of torsional properties and damages of glass/epoxy composite pipes. in Acta periodica technologica
Faculty of Technology, Novi Sad.(37), 97-106.
https://doi.org/10.2298/APT0637097P

Putić S, Stamenović M, Stajčić P, Bajčeta B, Bošnjak S. Investigation method of torsional properties and damages of glass/epoxy composite pipes. in Acta periodica technologica. 2006;(37):97-106.
doi:10.2298/APT0637097P .

Putić, Slaviša, Stamenović, Marina, Stajčić, Predrag, Bajčeta, Branislav, Bošnjak, Srđan, "Investigation method of torsional properties and damages of glass/epoxy composite pipes" in Acta periodica technologica, no. 37 (2006):97-106,
https://doi.org/10.2298/APT0637097P . .

TY  - JOUR
AU  - Putić, Slaviša
AU  - Rakin, Marko
AU  - Bošnjak, Srđan
AU  - Stajčić, Predrag
PY  - 2005
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/806
AB  - Pressure vessels during the usage are exposed under very bad working conditions which make very high tension. In this work the calculation of all the elements of vertical cylindrical pressure vessel for the storage of beer which is now in usage can influence safe work and experimenting (cylinder, torispherical heads, holes, blind flanges, cover plates and flanges). Calculation of the tension condition was done according to the standards and rules about the pressure vessels. The addition to this calculation as wall as the contribution of this work is the calculation by the usage of the Finite Element Method by usage of finite element of the thin shell type. The results we got and their analysis allow the whole approach to the mark of safety of pressure vessel in usage.
AB  - Posude pod pritiskom su u eksploataciji izložene nepovoljnim radnim uslovima koji prouzrokuju veoma visoke napone. U okviru ovog rada prikazan je proračun svih elemenata vertikalne cilindrične posude pod pritiskom za skladištenje piva koja se trenutno nalazi u eksploataciji koji mogu uticati na siguran rad i ispitivanje (omotač, danca, ojačanja otvora, prirubnice i prirubnički spojevi). Proračun naponskog stanja je urađen prema odgovarajućim standardima i pravilnicima o posudama pod pritiskom. Dodatak ovakvom proračunu kao i doprinos ovog rada predstavlja proračun primenom metode konačnih elemenata korišćenjem konačnog elementa tipa tanke ljuske. Dobijeni rezultati i njihova analiza omogućavaju sveobuhvatni pristup oceni sigurnosti posude u eksploataciji.
PB  - Univerzitet u Nišu - Tehnološki fakultet, Leskovac
T2  - Zbornik radova Tehnološkog fakulteta, Leskovac
T1  - Numeric analysis of tension condition of pressure vessel for the storage of beer
T1  - Numerička analiza naponskog stanja posude pod pritiskom za skladištenje piva
EP  - 165
IS  - 15
SP  - 152
UR  - https://hdl.handle.net/21.15107/rcub_technorep_806
ER  - 

@article{
author = "Putić, Slaviša and Rakin, Marko and Bošnjak, Srđan and Stajčić, Predrag",
year = "2005",
abstract = "Pressure vessels during the usage are exposed under very bad working conditions which make very high tension. In this work the calculation of all the elements of vertical cylindrical pressure vessel for the storage of beer which is now in usage can influence safe work and experimenting (cylinder, torispherical heads, holes, blind flanges, cover plates and flanges). Calculation of the tension condition was done according to the standards and rules about the pressure vessels. The addition to this calculation as wall as the contribution of this work is the calculation by the usage of the Finite Element Method by usage of finite element of the thin shell type. The results we got and their analysis allow the whole approach to the mark of safety of pressure vessel in usage., Posude pod pritiskom su u eksploataciji izložene nepovoljnim radnim uslovima koji prouzrokuju veoma visoke napone. U okviru ovog rada prikazan je proračun svih elemenata vertikalne cilindrične posude pod pritiskom za skladištenje piva koja se trenutno nalazi u eksploataciji koji mogu uticati na siguran rad i ispitivanje (omotač, danca, ojačanja otvora, prirubnice i prirubnički spojevi). Proračun naponskog stanja je urađen prema odgovarajućim standardima i pravilnicima o posudama pod pritiskom. Dodatak ovakvom proračunu kao i doprinos ovog rada predstavlja proračun primenom metode konačnih elemenata korišćenjem konačnog elementa tipa tanke ljuske. Dobijeni rezultati i njihova analiza omogućavaju sveobuhvatni pristup oceni sigurnosti posude u eksploataciji.",
publisher = "Univerzitet u Nišu - Tehnološki fakultet, Leskovac",
journal = "Zbornik radova Tehnološkog fakulteta, Leskovac",
title = "Numeric analysis of tension condition of pressure vessel for the storage of beer, Numerička analiza naponskog stanja posude pod pritiskom za skladištenje piva",
pages = "165-152",
number = "15",
url = "https://hdl.handle.net/21.15107/rcub_technorep_806"
}

Putić, S., Rakin, M., Bošnjak, S.,& Stajčić, P.. (2005). Numeric analysis of tension condition of pressure vessel for the storage of beer. in Zbornik radova Tehnološkog fakulteta, Leskovac
Univerzitet u Nišu - Tehnološki fakultet, Leskovac.(15), 152-165.
https://hdl.handle.net/21.15107/rcub_technorep_806

Putić S, Rakin M, Bošnjak S, Stajčić P. Numeric analysis of tension condition of pressure vessel for the storage of beer. in Zbornik radova Tehnološkog fakulteta, Leskovac. 2005;(15):152-165.
https://hdl.handle.net/21.15107/rcub_technorep_806 .

Putić, Slaviša, Rakin, Marko, Bošnjak, Srđan, Stajčić, Predrag, "Numeric analysis of tension condition of pressure vessel for the storage of beer" in Zbornik radova Tehnološkog fakulteta, Leskovac, no. 15 (2005):152-165,
https://hdl.handle.net/21.15107/rcub_technorep_806 .

TY  - JOUR
AU  - Putić, Slaviša
AU  - Stamenović, Marina
AU  - Bajčeta, Branislav
AU  - Stajčić, Predrag
AU  - Bošnjak, Srđan
PY  - 2005
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/779
AB  - The aim of this paper was to present the determination of tensile strength Rm and modulus of elasticity Et of glass-epoxy composites at two different temperatures (at room temperature t=20°C, and at t =-50°C). Standard mechanical testing was carried out on glass woven-epoxy composite material with different structures (two specific weights of reinforcement, 210 g/m2 and 550 g/m2) and orientations (0°/90° and ±45°). Micromechanical analysis of failure was performed on a stereo microscope and SEM in order to determine real models and mechanisms of crack.
AB  - Predmet i cilj ispitivanja prikazanih u ovom radu predstavlja određivanje zatezne čvrstoće (Rm) i modula elastičnosti (EJ staklo-epoksi kompozitnih materijala ispitivanjem na zatezanje na dve različite temperature (t=20°S i t=-50°S). Ispitivanja su izvedena prema standardu na staklo-epoksi kompozitnom materijalu različitih struktura (dve specifične težine ojačanja 210 g/m2H 550 g/m2) i orijentacija ojačanja (0°/90° i ±45°). Doprinos predstavlja i mikromehanička analiza na prelomnim površinama izvedena na stereo i elektronskom mikroskopu kojom se došlo do stvarnih modela nastanka i razvoja oštećenja pri izvedenim ispitivanjima.
PB  - Faculty of Technology, Novi Sad
T2  - Acta periodica technologica
T1  - Low-temperature tension properties of glass-epoxy composite materials
T1  - Određivanje zateznih svojstava staklo-epoksi kompozitnih materijala na niskim temperaturama
EP  - 134
IS  - 36
SP  - 123
DO  - 10.2298/APT0536123P
ER  - 

@article{
author = "Putić, Slaviša and Stamenović, Marina and Bajčeta, Branislav and Stajčić, Predrag and Bošnjak, Srđan",
year = "2005",
abstract = "The aim of this paper was to present the determination of tensile strength Rm and modulus of elasticity Et of glass-epoxy composites at two different temperatures (at room temperature t=20°C, and at t =-50°C). Standard mechanical testing was carried out on glass woven-epoxy composite material with different structures (two specific weights of reinforcement, 210 g/m2 and 550 g/m2) and orientations (0°/90° and ±45°). Micromechanical analysis of failure was performed on a stereo microscope and SEM in order to determine real models and mechanisms of crack., Predmet i cilj ispitivanja prikazanih u ovom radu predstavlja određivanje zatezne čvrstoće (Rm) i modula elastičnosti (EJ staklo-epoksi kompozitnih materijala ispitivanjem na zatezanje na dve različite temperature (t=20°S i t=-50°S). Ispitivanja su izvedena prema standardu na staklo-epoksi kompozitnom materijalu različitih struktura (dve specifične težine ojačanja 210 g/m2H 550 g/m2) i orijentacija ojačanja (0°/90° i ±45°). Doprinos predstavlja i mikromehanička analiza na prelomnim površinama izvedena na stereo i elektronskom mikroskopu kojom se došlo do stvarnih modela nastanka i razvoja oštećenja pri izvedenim ispitivanjima.",
publisher = "Faculty of Technology, Novi Sad",
journal = "Acta periodica technologica",
title = "Low-temperature tension properties of glass-epoxy composite materials, Određivanje zateznih svojstava staklo-epoksi kompozitnih materijala na niskim temperaturama",
pages = "134-123",
number = "36",
doi = "10.2298/APT0536123P"
}

Putić, S., Stamenović, M., Bajčeta, B., Stajčić, P.,& Bošnjak, S.. (2005). Low-temperature tension properties of glass-epoxy composite materials. in Acta periodica technologica
Faculty of Technology, Novi Sad.(36), 123-134.
https://doi.org/10.2298/APT0536123P

Putić S, Stamenović M, Bajčeta B, Stajčić P, Bošnjak S. Low-temperature tension properties of glass-epoxy composite materials. in Acta periodica technologica. 2005;(36):123-134.
doi:10.2298/APT0536123P .

Putić, Slaviša, Stamenović, Marina, Bajčeta, Branislav, Stajčić, Predrag, Bošnjak, Srđan, "Low-temperature tension properties of glass-epoxy composite materials" in Acta periodica technologica, no. 36 (2005):123-134,
https://doi.org/10.2298/APT0536123P . .

TY  - JOUR
AU  - Putić, Slaviša
AU  - Bošnjak, Srđan
AU  - Stamenović, Marina
AU  - Stajčić, Predrag
PY  - 2005
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/805
AB  - Mechanical loading of pressure vessels mainly comes from pressure (inner and outer) under which is vessel subjected. Tension which appears changes according to the thickness of the wall. Thanks to the its specific structure, by the usage of composite materials in pressure vessels a lot of advantages are got in the field of technology of making, and during the usage, in comparison to some other constructive materials. Their shaping by the need makes it possible to optimize the structure along the thickness. The subject and aim of this work represents calculation and description of numeric model with which the different cases of the work of inner and outer pressure were simulated, for the different thickness of the wall of the pressure vessel of glass epoxy composite. In that way we come to optimal structure of material for different working pressures under which the vessels can be submitted during the usage.
AB  - Mehaničko opterećenje kod posuda pod pritiskom uglavnom potiče od pritiska (unutrašnjeg ili spoljnjeg), kome je posuda izložena. Napon koji se usled ovakvog opterećenja javlja menja se po debljini zida. Zahvaljujući specifičnostima svoje strukture, korišćenjem kompozitnih materijala u izradi posuda pod pritiskom obezbeđuje se niz prednosti kako u oblasti tehnologije izrade, tako i u toku same eksploatacije, u odnosu na neke druge konstruktivne materijale. Njihovo oblikovanje po želji omogućava da se na taj način duž debljine ostvari optimizacija strukture. Predmet i cilj ovog rada predstavlja proračun i prikaz numeričkog modela kojim su se simulirali različiti pritisci, za različite debljine i strukture zida posude od staklo-epoksi kompozitnog materijala. Na taj način se mogu dobiti optimalne strukture za različite radne pritiske kojima posude u eksploataciji mogu biti izložene.
PB  - Univerzitet u Nišu - Tehnološki fakultet, Leskovac
T2  - Zbornik radova Tehnološkog fakulteta, Leskovac
T1  - Through thickness optimal design of glass-epoxy composite pressure vessel
T1  - Optimizacija strukture laminarnog kompozitnog materijala po debljini zida posude pod pritiskom
EP  - 151
IS  - 15
SP  - 138
UR  - https://hdl.handle.net/21.15107/rcub_technorep_805
ER  - 

@article{
author = "Putić, Slaviša and Bošnjak, Srđan and Stamenović, Marina and Stajčić, Predrag",
year = "2005",
abstract = "Mechanical loading of pressure vessels mainly comes from pressure (inner and outer) under which is vessel subjected. Tension which appears changes according to the thickness of the wall. Thanks to the its specific structure, by the usage of composite materials in pressure vessels a lot of advantages are got in the field of technology of making, and during the usage, in comparison to some other constructive materials. Their shaping by the need makes it possible to optimize the structure along the thickness. The subject and aim of this work represents calculation and description of numeric model with which the different cases of the work of inner and outer pressure were simulated, for the different thickness of the wall of the pressure vessel of glass epoxy composite. In that way we come to optimal structure of material for different working pressures under which the vessels can be submitted during the usage., Mehaničko opterećenje kod posuda pod pritiskom uglavnom potiče od pritiska (unutrašnjeg ili spoljnjeg), kome je posuda izložena. Napon koji se usled ovakvog opterećenja javlja menja se po debljini zida. Zahvaljujući specifičnostima svoje strukture, korišćenjem kompozitnih materijala u izradi posuda pod pritiskom obezbeđuje se niz prednosti kako u oblasti tehnologije izrade, tako i u toku same eksploatacije, u odnosu na neke druge konstruktivne materijale. Njihovo oblikovanje po želji omogućava da se na taj način duž debljine ostvari optimizacija strukture. Predmet i cilj ovog rada predstavlja proračun i prikaz numeričkog modela kojim su se simulirali različiti pritisci, za različite debljine i strukture zida posude od staklo-epoksi kompozitnog materijala. Na taj način se mogu dobiti optimalne strukture za različite radne pritiske kojima posude u eksploataciji mogu biti izložene.",
publisher = "Univerzitet u Nišu - Tehnološki fakultet, Leskovac",
journal = "Zbornik radova Tehnološkog fakulteta, Leskovac",
title = "Through thickness optimal design of glass-epoxy composite pressure vessel, Optimizacija strukture laminarnog kompozitnog materijala po debljini zida posude pod pritiskom",
pages = "151-138",
number = "15",
url = "https://hdl.handle.net/21.15107/rcub_technorep_805"
}

Putić, S., Bošnjak, S., Stamenović, M.,& Stajčić, P.. (2005). Through thickness optimal design of glass-epoxy composite pressure vessel. in Zbornik radova Tehnološkog fakulteta, Leskovac
Univerzitet u Nišu - Tehnološki fakultet, Leskovac.(15), 138-151.
https://hdl.handle.net/21.15107/rcub_technorep_805

Putić S, Bošnjak S, Stamenović M, Stajčić P. Through thickness optimal design of glass-epoxy composite pressure vessel. in Zbornik radova Tehnološkog fakulteta, Leskovac. 2005;(15):138-151.
https://hdl.handle.net/21.15107/rcub_technorep_805 .

Putić, Slaviša, Bošnjak, Srđan, Stamenović, Marina, Stajčić, Predrag, "Through thickness optimal design of glass-epoxy composite pressure vessel" in Zbornik radova Tehnološkog fakulteta, Leskovac, no. 15 (2005):138-151,
https://hdl.handle.net/21.15107/rcub_technorep_805 .