TY  - JOUR
AU  - Momčilović, Dejan B.
AU  - Hut, Nenad
AU  - Milović, Ljubica
AU  - Atanasovska, Ivana
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/7496
AB  - Uprkos brojnim i skupim istraživanjima u oblasti zamora i loma kao i redovne kontrole gotovog proizvoda, prsline se javljaju svakodnevno u mnogim oblastima. Ovaj rad opisuje analizu otkaza spojnice lanca korišćene u konvejeru za transport cementa. Lančasti elevatori sa kašikom koriste spojnice za spajanje segmenata lanca i za vezivanje kašike za transport rasutog tereta. Površina kontakta između karike lanca i spojnice predstavlja jedno od najopterećenijih mesta na celom elevatoru. Tokom redovnog održavanja na upotrebljenim i novim spojnicama lanaca uočene su prsline u otvrdnutim termički obrađenim zonama. Radi povećanja otpornosti spojnica na habanje one se u oblasti kontakta sa karikom lanca termički obrađuju. Pojava prslina u novim nekorišćenim spojnicama pokrenula je ispitivanja sa ciljem da se utvrdi poreklo prslina na novim spojnicama. Pored ispitivanja uzroka nastanka ovih prslina u radu su navedeni predlozi mera za sprečavanje njihovog nastanka.
AB  - In spite of numerous and expensive research in the field of fatigue and fracture and regular control of end products, cracks occur every day in all fields of human activity. This paper describes failure analysis of chain brackets, used in conveyor systems for cement production. Chain type bucket elevators utilize chain brackets for joining segments of chain as well as for attaching brackets for bulk material transport. The contact zone between chain link and bracket is one of the most stressed in this elevator system. During regular maintenance, cracks are found on used and new brackets in the case hardened zone. Case hardening of the chain bracket is performed due to requirements for increased wear resistance of the chain link contact. The occurrence of cracks in new brackets raised the question regarding the origin of cracks and it is the main subject of this paper. This paper also suggests a solution for avoidance of cracks on chain brackets.
PB  - Integritet i vek konstrukcija, Beograd
T2  - Structural Integrity and Life
T1  - Analiza loma spojnice lanca
T1  - Failure analysis of chain bracket
EP  - 126
IS  - 2
SP  - 123
VL  - 11
UR  - https://hdl.handle.net/21.15107/rcub_machinery_7496
ER  - 

@article{
author = "Momčilović, Dejan B. and Hut, Nenad and Milović, Ljubica and Atanasovska, Ivana",
abstract = "Uprkos brojnim i skupim istraživanjima u oblasti zamora i loma kao i redovne kontrole gotovog proizvoda, prsline se javljaju svakodnevno u mnogim oblastima. Ovaj rad opisuje analizu otkaza spojnice lanca korišćene u konvejeru za transport cementa. Lančasti elevatori sa kašikom koriste spojnice za spajanje segmenata lanca i za vezivanje kašike za transport rasutog tereta. Površina kontakta između karike lanca i spojnice predstavlja jedno od najopterećenijih mesta na celom elevatoru. Tokom redovnog održavanja na upotrebljenim i novim spojnicama lanaca uočene su prsline u otvrdnutim termički obrađenim zonama. Radi povećanja otpornosti spojnica na habanje one se u oblasti kontakta sa karikom lanca termički obrađuju. Pojava prslina u novim nekorišćenim spojnicama pokrenula je ispitivanja sa ciljem da se utvrdi poreklo prslina na novim spojnicama. Pored ispitivanja uzroka nastanka ovih prslina u radu su navedeni predlozi mera za sprečavanje njihovog nastanka., In spite of numerous and expensive research in the field of fatigue and fracture and regular control of end products, cracks occur every day in all fields of human activity. This paper describes failure analysis of chain brackets, used in conveyor systems for cement production. Chain type bucket elevators utilize chain brackets for joining segments of chain as well as for attaching brackets for bulk material transport. The contact zone between chain link and bracket is one of the most stressed in this elevator system. During regular maintenance, cracks are found on used and new brackets in the case hardened zone. Case hardening of the chain bracket is performed due to requirements for increased wear resistance of the chain link contact. The occurrence of cracks in new brackets raised the question regarding the origin of cracks and it is the main subject of this paper. This paper also suggests a solution for avoidance of cracks on chain brackets.",
publisher = "Integritet i vek konstrukcija, Beograd",
journal = "Structural Integrity and Life",
title = "Analiza loma spojnice lanca, Failure analysis of chain bracket",
pages = "126-123",
number = "2",
volume = "11",
url = "https://hdl.handle.net/21.15107/rcub_machinery_7496"
}

Momčilović, D. B., Hut, N., Milović, L.,& Atanasovska, I..Analiza loma spojnice lanca. in Structural Integrity and Life
Integritet i vek konstrukcija, Beograd., 11(2), 123-126.
https://hdl.handle.net/21.15107/rcub_machinery_7496

Momčilović DB, Hut N, Milović L, Atanasovska I. Analiza loma spojnice lanca. in Structural Integrity and Life.11(2):123-126.
https://hdl.handle.net/21.15107/rcub_machinery_7496 .

Momčilović, Dejan B., Hut, Nenad, Milović, Ljubica, Atanasovska, Ivana, "Analiza loma spojnice lanca" in Structural Integrity and Life, 11, no. 2:123-126,
https://hdl.handle.net/21.15107/rcub_machinery_7496 .

TY  - JOUR
AU  - Mitrović, Radivoje
AU  - Momčilović, Dejan B.
AU  - Erić, Olivera
AU  - Atanasovska, Ivana
AU  - Hut, Nenad T.
PY  - 2012
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/1372
AB  - The steam pipe line and steam line material, along with its welded joints, subject to damage that accumulates during operation in coal power plants. As a result of thermal fatigue, dilatation of steam pipe line at an operating temperature may lead to cracks initiation at the critical zones within heat affected zone of steam pipe line welded joints. By registration of thermal cycle during welding and subsequent heat affected zone simulation is possible to obtain target microstructure. For the simulation is chosen heat resisting steel, 12H1MF (designation 13CrMo44 according to DIN standard). From the viewpoint of mechanical properties, special attention is on impact toughness mostly because very small number of available references. After simulation of single run and multi run welding test on instrumented Charpy pendulum. Metallographic and fractographic analysis is also performed, on simulated 12H1MF steel from service and new, unused steel. The results and correlation between microstructure and impact toughness is discussed, too.
PB  - Univerzitet u Beogradu - Institut za nuklearne nauke Vinča, Beograd
T2  - Thermal Science
T1  - Study on impact properties of creep-resistant steel thermally simulated heat affected zone
EP  - 525
IS  - 2
SP  - 513
VL  - 16
DO  - 10.2298/TSCI111006142M
ER  - 

@article{
author = "Mitrović, Radivoje and Momčilović, Dejan B. and Erić, Olivera and Atanasovska, Ivana and Hut, Nenad T.",
year = "2012",
abstract = "The steam pipe line and steam line material, along with its welded joints, subject to damage that accumulates during operation in coal power plants. As a result of thermal fatigue, dilatation of steam pipe line at an operating temperature may lead to cracks initiation at the critical zones within heat affected zone of steam pipe line welded joints. By registration of thermal cycle during welding and subsequent heat affected zone simulation is possible to obtain target microstructure. For the simulation is chosen heat resisting steel, 12H1MF (designation 13CrMo44 according to DIN standard). From the viewpoint of mechanical properties, special attention is on impact toughness mostly because very small number of available references. After simulation of single run and multi run welding test on instrumented Charpy pendulum. Metallographic and fractographic analysis is also performed, on simulated 12H1MF steel from service and new, unused steel. The results and correlation between microstructure and impact toughness is discussed, too.",
publisher = "Univerzitet u Beogradu - Institut za nuklearne nauke Vinča, Beograd",
journal = "Thermal Science",
title = "Study on impact properties of creep-resistant steel thermally simulated heat affected zone",
pages = "525-513",
number = "2",
volume = "16",
doi = "10.2298/TSCI111006142M"
}

Mitrović, R., Momčilović, D. B., Erić, O., Atanasovska, I.,& Hut, N. T.. (2012). Study on impact properties of creep-resistant steel thermally simulated heat affected zone. in Thermal Science
Univerzitet u Beogradu - Institut za nuklearne nauke Vinča, Beograd., 16(2), 513-525.
https://doi.org/10.2298/TSCI111006142M

Mitrović R, Momčilović DB, Erić O, Atanasovska I, Hut NT. Study on impact properties of creep-resistant steel thermally simulated heat affected zone. in Thermal Science. 2012;16(2):513-525.
doi:10.2298/TSCI111006142M .

Mitrović, Radivoje, Momčilović, Dejan B., Erić, Olivera, Atanasovska, Ivana, Hut, Nenad T., "Study on impact properties of creep-resistant steel thermally simulated heat affected zone" in Thermal Science, 16, no. 2 (2012):513-525,
https://doi.org/10.2298/TSCI111006142M . .

TY  - CONF
AU  - Mitrović, Radivoje
AU  - Momčilović, Dejan B.
AU  - Atanasovska, Ivana
AU  - Hut, Nenad T.
PY  - 2010
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/1046
AB  - Vrlo visoka čvrstoća omogućava žičanom užetu da prenese velike zatezne sile i da se kreće po koturima relativno malog prečnika. Žice od čelika vrlo visoke čvrstoće su postojale više od sto godina pre nego što su patentirane, kada je uveden specijalni postupak zagrevanja i usavršen postupak izvlačenja. Dalja poboljšanja posle toga su uvedena u relativno malim koracima. Žičana užad uvek imaju ograničen radni vek. Zbog toga ona moraju da se podvrgnu inspekciji i ispitaju u pravilnim intervalima da bi se zamenila znatno pre otkaza. Krajnji korisnik mašine sa čeličnim žičanim užetom u svakom slučaju želi da ima grubu ocenu radnog veka užeta već u ranoj fazi razvoja mašine. tako da bude u mogućnosti, ako zatreba, da poboljša sistem mašine. To je jedan od razloga zbog kojih su tokom niza godina izvedena obimna istraživanja kako bi se poboljšali postupci proračuna za predviđanje radnog veka žičanih užadi. Namena ovog rada je da ponudi pregled informacija o postupcima proračuna i da prikaže mogućnosti i ograničenja postupaka prognoziranja za predviđanja radnog veka čeličnih žičanih užadi u eksploataciji.
AB  - Very high strength enables wire ropes to support large tensile forces and to run over sheaves with relative small diameters. Very high strength steel wires had already been in existence for more than a hundred years when patenting, a special heating process was introduced and the drawing process improved. Since then, further improvements have only occurred in relatively small steps. Wire ropes always have a limited service life. Therefore they must be inspected and examined at regular intervals so that they are replaced well before failure. End-users of machinery with steel wire ropes, however, would like to have a rough estimation of the service life of the ropes already in the early stages of conceiving their machines, so that they can, if necessary, improve the revving system. This is one of the reasons why for many years extensive research is carried out in order to improve calculations for predicting the service life of wire ropes. This paper is meant to offer an overview information on the method of calculation and to demonstrate the potential and limitations of the forecasting procedure for service-life prediction of running steel wire ropes.
PB  - Institut za ispitivanje materijala, Beograd
C3  - Structural Integrity and Life
T1  - Predviđanje veka čeličnog žičanog užeta u eksploataciji
T1  - Service life prediction of running steel wire ropes
EP  - 202
IS  - 3
SP  - 199
VL  - 10
UR  - https://hdl.handle.net/21.15107/rcub_machinery_1046
ER  - 

@conference{
author = "Mitrović, Radivoje and Momčilović, Dejan B. and Atanasovska, Ivana and Hut, Nenad T.",
year = "2010",
abstract = "Vrlo visoka čvrstoća omogućava žičanom užetu da prenese velike zatezne sile i da se kreće po koturima relativno malog prečnika. Žice od čelika vrlo visoke čvrstoće su postojale više od sto godina pre nego što su patentirane, kada je uveden specijalni postupak zagrevanja i usavršen postupak izvlačenja. Dalja poboljšanja posle toga su uvedena u relativno malim koracima. Žičana užad uvek imaju ograničen radni vek. Zbog toga ona moraju da se podvrgnu inspekciji i ispitaju u pravilnim intervalima da bi se zamenila znatno pre otkaza. Krajnji korisnik mašine sa čeličnim žičanim užetom u svakom slučaju želi da ima grubu ocenu radnog veka užeta već u ranoj fazi razvoja mašine. tako da bude u mogućnosti, ako zatreba, da poboljša sistem mašine. To je jedan od razloga zbog kojih su tokom niza godina izvedena obimna istraživanja kako bi se poboljšali postupci proračuna za predviđanje radnog veka žičanih užadi. Namena ovog rada je da ponudi pregled informacija o postupcima proračuna i da prikaže mogućnosti i ograničenja postupaka prognoziranja za predviđanja radnog veka čeličnih žičanih užadi u eksploataciji., Very high strength enables wire ropes to support large tensile forces and to run over sheaves with relative small diameters. Very high strength steel wires had already been in existence for more than a hundred years when patenting, a special heating process was introduced and the drawing process improved. Since then, further improvements have only occurred in relatively small steps. Wire ropes always have a limited service life. Therefore they must be inspected and examined at regular intervals so that they are replaced well before failure. End-users of machinery with steel wire ropes, however, would like to have a rough estimation of the service life of the ropes already in the early stages of conceiving their machines, so that they can, if necessary, improve the revving system. This is one of the reasons why for many years extensive research is carried out in order to improve calculations for predicting the service life of wire ropes. This paper is meant to offer an overview information on the method of calculation and to demonstrate the potential and limitations of the forecasting procedure for service-life prediction of running steel wire ropes.",
publisher = "Institut za ispitivanje materijala, Beograd",
journal = "Structural Integrity and Life",
title = "Predviđanje veka čeličnog žičanog užeta u eksploataciji, Service life prediction of running steel wire ropes",
pages = "202-199",
number = "3",
volume = "10",
url = "https://hdl.handle.net/21.15107/rcub_machinery_1046"
}

Mitrović, R., Momčilović, D. B., Atanasovska, I.,& Hut, N. T.. (2010). Predviđanje veka čeličnog žičanog užeta u eksploataciji. in Structural Integrity and Life
Institut za ispitivanje materijala, Beograd., 10(3), 199-202.
https://hdl.handle.net/21.15107/rcub_machinery_1046

Mitrović R, Momčilović DB, Atanasovska I, Hut NT. Predviđanje veka čeličnog žičanog užeta u eksploataciji. in Structural Integrity and Life. 2010;10(3):199-202.
https://hdl.handle.net/21.15107/rcub_machinery_1046 .

Mitrović, Radivoje, Momčilović, Dejan B., Atanasovska, Ivana, Hut, Nenad T., "Predviđanje veka čeličnog žičanog užeta u eksploataciji" in Structural Integrity and Life, 10, no. 3 (2010):199-202,
https://hdl.handle.net/21.15107/rcub_machinery_1046 .