TY  - JOUR
AU  - Drobnjak, Radmila
AU  - Radović-Stojanović, Jelena   
AU  - Drobnjak, Predrag
AU  - Nešić, Ivan
PY  - 2000
UR  - http://jakov.kpu.edu.rs/handle/123456789/14
AB  - One of the biggest problems in the process of casting, is how to determine the distribution of temperature, taking into consideration the effects of several mechanisms of heat exchange. The experimental methods being rather expensive and complicated, the numerical methods are nowadays applied largely. Differential equations of heat conduction are derived according to the basic laws of continuum mechanics, taking into account the phase changes during the casting. The equations obtained are solved by the method of finite elements. In this way, a new scientific discipline is established within the scope of continuum mechanics. As an application of the described procedure, the temperature fields in the casting process of alloyed casting are determined.
AB  - Jedan od najsloženijih problema pri livenju je kako i na koji način da se odredi raspodela temperature, obzirom na dejstvo više mehanizama razmene toplote. Kako su eksperimentalne metode dosta skupe i složene, u novije vreme veliku primenu imaju numeričke metode. Polazeći od osnovnih zakona mehanike kontinuuma definisane su diferencijalne jednačine provođenja toplote, uzimajući u obzir fazne promene pri livenju. Dobijene jednačine su rešavane metodom konačnih elemenata. Time je ustanovljena nova naučna disciplina u okviru mehanike kontinuuma. Kao primena opisane procedure određena su temperaturna polja u toku procesa livenja legiranog liva.
PB  - Beograd : Kriminalističko- policijska akademija
T2  - Nauka, bezbednost, policija
T1  - Application of the method of finite elements to the simulation of casting process
T1  - Primena metode konačnih elemenata na simulaciju procesa livenja
VL  - 5
IS  - 1
SP  - 143
EP  - 167
UR  - https://hdl.handle.net/21.15107/rcub_jakov_14
ER  - 

@article{
author = "Drobnjak, Radmila and Radović-Stojanović, Jelena    and Drobnjak, Predrag and Nešić, Ivan",
year = "2000",
abstract = "One of the biggest problems in the process of casting, is how to determine the distribution of temperature, taking into consideration the effects of several mechanisms of heat exchange. The experimental methods being rather expensive and complicated, the numerical methods are nowadays applied largely. Differential equations of heat conduction are derived according to the basic laws of continuum mechanics, taking into account the phase changes during the casting. The equations obtained are solved by the method of finite elements. In this way, a new scientific discipline is established within the scope of continuum mechanics. As an application of the described procedure, the temperature fields in the casting process of alloyed casting are determined., Jedan od najsloženijih problema pri livenju je kako i na koji način da se odredi raspodela temperature, obzirom na dejstvo više mehanizama razmene toplote. Kako su eksperimentalne metode dosta skupe i složene, u novije vreme veliku primenu imaju numeričke metode. Polazeći od osnovnih zakona mehanike kontinuuma definisane su diferencijalne jednačine provođenja toplote, uzimajući u obzir fazne promene pri livenju. Dobijene jednačine su rešavane metodom konačnih elemenata. Time je ustanovljena nova naučna disciplina u okviru mehanike kontinuuma. Kao primena opisane procedure određena su temperaturna polja u toku procesa livenja legiranog liva.",
publisher = "Beograd : Kriminalističko- policijska akademija",
journal = "Nauka, bezbednost, policija",
title = "Application of the method of finite elements to the simulation of casting process, Primena metode konačnih elemenata na simulaciju procesa livenja",
volume = "5",
number = "1",
pages = "143-167",
url = "https://hdl.handle.net/21.15107/rcub_jakov_14"
}

Drobnjak, R., Radović-Stojanović, J., Drobnjak, P.,& Nešić, I.. (2000). Application of the method of finite elements to the simulation of casting process. in Nauka, bezbednost, policija
Beograd : Kriminalističko- policijska akademija., 5(1), 143-167.
https://hdl.handle.net/21.15107/rcub_jakov_14

Drobnjak R, Radović-Stojanović J, Drobnjak P, Nešić I. Application of the method of finite elements to the simulation of casting process. in Nauka, bezbednost, policija. 2000;5(1):143-167.
https://hdl.handle.net/21.15107/rcub_jakov_14 .

Drobnjak, Radmila, Radović-Stojanović, Jelena   , Drobnjak, Predrag, Nešić, Ivan, "Application of the method of finite elements to the simulation of casting process" in Nauka, bezbednost, policija, 5, no. 1 (2000):143-167,
https://hdl.handle.net/21.15107/rcub_jakov_14 .

TY  - JOUR
AU  - Milosavljević, Anđelka
AU  - Miladinov, Miroslav
AU  - Radovanović, Radovan
AU  - Nešić, Ivan
AU  - Drobnjak, Predrag
PY  - 1999
UR  - http://jakov.kpu.edu.rs/handle/123456789/10
AB  - In this paper low-carbon steel which 3,8-4,2% Si and 0,08% C transformer plates exposed to the radiation of ruby laser in Q-switch and free generation regimes are examined. Investigations were carried out at atmospheric pressure under the laboratory conditions. Transformer plates were subjected to very high temperature gradients under heating and cooling conditions where the former is correlated to pulse characteristic and the later to material. Preliminary investigations were carried out by laser drilling and resulting traces on material were recorded by scanning electron microscope to find out the influence of different energies and pulse lengths on structural changes in the material, but wide application of transformer plates in electrical and mechanical engineering demands finding the regimes of thermomechanical processing and also the technology of cutting and connecting in the sense of conservation of magnetic characteristics.
AB  - U ovom radu ispitivanja su izvedena na niskougljeničnim čelicima sa 3,8-4,2% Si i 0,08% S koji su izlagani dejstvu rubinskog lasera u režimu gigantskih impulsa (Q-switch) i slobodne generacije. Ispitivanja su izvedena na atmosferskom pritisku u laboratorijskim uslovima. Transformatorski limovi su podvrgavani vrlo velikim temperaturnim gradijentima u uslovima grejanja i hlađenja, od kojih je prvi vezan za karakteristiku impulsa, a drugi za materijal. Preliminarna ispitivanja izvedena su bušenjem laserskim snopom, a ostvareni otisci na materijalu snimani su skaning elektronskim mikroskopom s ciljem da se definiše uticaj različitih energija i vremena impulsa na strukturne promene u materijalu, jer velika primena niskougljeničnih čelika sa 3,8-4,2% Si i 0,08% S u elektronici i mašinstvu zahteva definisanje režima termomehaničke obrade, a takođe i tehnologiju rezanja i spajanja u smislu očuvanja magnetnih karakteristika.
PB  - Beograd : Kriminalističko- policijska akademija
T2  - Nauka, bezbednost, policija
T1  - Low-carbon steel in their structure provoked by laser radiation on two working regimes
T1  - Niskougljenični čelici i promene u njihovoj strukturi nastale laserskim zračenjem u dva režima rada
VL  - 4
IS  - 1
SP  - 43
EP  - 52
UR  - https://hdl.handle.net/21.15107/rcub_jakov_10
ER  - 

@article{
author = "Milosavljević, Anđelka and Miladinov, Miroslav and Radovanović, Radovan and Nešić, Ivan and Drobnjak, Predrag",
year = "1999",
abstract = "In this paper low-carbon steel which 3,8-4,2% Si and 0,08% C transformer plates exposed to the radiation of ruby laser in Q-switch and free generation regimes are examined. Investigations were carried out at atmospheric pressure under the laboratory conditions. Transformer plates were subjected to very high temperature gradients under heating and cooling conditions where the former is correlated to pulse characteristic and the later to material. Preliminary investigations were carried out by laser drilling and resulting traces on material were recorded by scanning electron microscope to find out the influence of different energies and pulse lengths on structural changes in the material, but wide application of transformer plates in electrical and mechanical engineering demands finding the regimes of thermomechanical processing and also the technology of cutting and connecting in the sense of conservation of magnetic characteristics., U ovom radu ispitivanja su izvedena na niskougljeničnim čelicima sa 3,8-4,2% Si i 0,08% S koji su izlagani dejstvu rubinskog lasera u režimu gigantskih impulsa (Q-switch) i slobodne generacije. Ispitivanja su izvedena na atmosferskom pritisku u laboratorijskim uslovima. Transformatorski limovi su podvrgavani vrlo velikim temperaturnim gradijentima u uslovima grejanja i hlađenja, od kojih je prvi vezan za karakteristiku impulsa, a drugi za materijal. Preliminarna ispitivanja izvedena su bušenjem laserskim snopom, a ostvareni otisci na materijalu snimani su skaning elektronskim mikroskopom s ciljem da se definiše uticaj različitih energija i vremena impulsa na strukturne promene u materijalu, jer velika primena niskougljeničnih čelika sa 3,8-4,2% Si i 0,08% S u elektronici i mašinstvu zahteva definisanje režima termomehaničke obrade, a takođe i tehnologiju rezanja i spajanja u smislu očuvanja magnetnih karakteristika.",
publisher = "Beograd : Kriminalističko- policijska akademija",
journal = "Nauka, bezbednost, policija",
title = "Low-carbon steel in their structure provoked by laser radiation on two working regimes, Niskougljenični čelici i promene u njihovoj strukturi nastale laserskim zračenjem u dva režima rada",
volume = "4",
number = "1",
pages = "43-52",
url = "https://hdl.handle.net/21.15107/rcub_jakov_10"
}

Milosavljević, A., Miladinov, M., Radovanović, R., Nešić, I.,& Drobnjak, P.. (1999). Low-carbon steel in their structure provoked by laser radiation on two working regimes. in Nauka, bezbednost, policija
Beograd : Kriminalističko- policijska akademija., 4(1), 43-52.
https://hdl.handle.net/21.15107/rcub_jakov_10

Milosavljević A, Miladinov M, Radovanović R, Nešić I, Drobnjak P. Low-carbon steel in their structure provoked by laser radiation on two working regimes. in Nauka, bezbednost, policija. 1999;4(1):43-52.
https://hdl.handle.net/21.15107/rcub_jakov_10 .

Milosavljević, Anđelka, Miladinov, Miroslav, Radovanović, Radovan, Nešić, Ivan, Drobnjak, Predrag, "Low-carbon steel in their structure provoked by laser radiation on two working regimes" in Nauka, bezbednost, policija, 4, no. 1 (1999):43-52,
https://hdl.handle.net/21.15107/rcub_jakov_10 .