TY  - CONF
AU  - Kredegh, Abubakr
AU  - Sedmak, Aleksandar
AU  - Grbović, Aleksandar
AU  - Milošević, Nenad
AU  - Daničić, Darko
PY  - 2016
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/2307
AB  - The Extended Finite Element Method (xFEM) has been applied to simulate fatigue crack growth in an AA2024-T351 T welded joint, 5 mm thick, made by friction stir welding. The ABAQUS and Morfeo software has been used. Tensile fatigue loading (mean stress 10 MPa, stress ratio R=0) is applied to Tjoints with a configuration suitable for reinforced panels where both skin and the web (reinforcement or stiffener) is made of a high strength AA2024-T351. Crack is introduced in one edge of the skin base material. The properties of materials in the areas of joints and geometry measures of Tjoint are adopted from available experiments. Following numerical results are obtained: crack front coordinates (x, y, z) and stress intensity factors (K-I, K-II, K-III and K-ef) distribution along the crack tip, as well as the fatigue life estimation for every crack propagation step. The main objective of this research is to better understand fatigue behaviour of friction stir welded T joint of AA2024-T351.
PB  - Elsevier Science Bv, Amsterdam
C3  - Procedia Structural Integrity - 21st European Conference on Fracture, (Ecf21)
T1  - Numerical simulation of fatigue crack growth in friction stir welded T joint made of Al 2024 T351 alloy
EP  - 3072
SP  - 3065
VL  - 2
DO  - 10.1016/j.prostr.2016.06.383
ER  - 

@conference{
author = "Kredegh, Abubakr and Sedmak, Aleksandar and Grbović, Aleksandar and Milošević, Nenad and Daničić, Darko",
year = "2016",
abstract = "The Extended Finite Element Method (xFEM) has been applied to simulate fatigue crack growth in an AA2024-T351 T welded joint, 5 mm thick, made by friction stir welding. The ABAQUS and Morfeo software has been used. Tensile fatigue loading (mean stress 10 MPa, stress ratio R=0) is applied to Tjoints with a configuration suitable for reinforced panels where both skin and the web (reinforcement or stiffener) is made of a high strength AA2024-T351. Crack is introduced in one edge of the skin base material. The properties of materials in the areas of joints and geometry measures of Tjoint are adopted from available experiments. Following numerical results are obtained: crack front coordinates (x, y, z) and stress intensity factors (K-I, K-II, K-III and K-ef) distribution along the crack tip, as well as the fatigue life estimation for every crack propagation step. The main objective of this research is to better understand fatigue behaviour of friction stir welded T joint of AA2024-T351.",
publisher = "Elsevier Science Bv, Amsterdam",
journal = "Procedia Structural Integrity - 21st European Conference on Fracture, (Ecf21)",
title = "Numerical simulation of fatigue crack growth in friction stir welded T joint made of Al 2024 T351 alloy",
pages = "3072-3065",
volume = "2",
doi = "10.1016/j.prostr.2016.06.383"
}

Kredegh, A., Sedmak, A., Grbović, A., Milošević, N.,& Daničić, D.. (2016). Numerical simulation of fatigue crack growth in friction stir welded T joint made of Al 2024 T351 alloy. in Procedia Structural Integrity - 21st European Conference on Fracture, (Ecf21)
Elsevier Science Bv, Amsterdam., 2, 3065-3072.
https://doi.org/10.1016/j.prostr.2016.06.383

Kredegh A, Sedmak A, Grbović A, Milošević N, Daničić D. Numerical simulation of fatigue crack growth in friction stir welded T joint made of Al 2024 T351 alloy. in Procedia Structural Integrity - 21st European Conference on Fracture, (Ecf21). 2016;2:3065-3072.
doi:10.1016/j.prostr.2016.06.383 .

Kredegh, Abubakr, Sedmak, Aleksandar, Grbović, Aleksandar, Milošević, Nenad, Daničić, Darko, "Numerical simulation of fatigue crack growth in friction stir welded T joint made of Al 2024 T351 alloy" in Procedia Structural Integrity - 21st European Conference on Fracture, (Ecf21), 2 (2016):3065-3072,
https://doi.org/10.1016/j.prostr.2016.06.383 . .

TY  - CONF
AU  - Maneski, Taško
AU  - Ignjatović, Dragan
AU  - Daničić, Darko
AU  - Milošević-Mitić, Vesna
AU  - Jovančić, Predrag
AU  - Petrović, Ana
PY  - 2014
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/5997
AB  - Bucket wheel excavator ERs 1250 in Gacko has worked
for over 30 years. Excavator was working in very difficult
conditions because it was exploited very solid material
which negatively affected the dynamic behavior of the
whole structure. Bucket wheel boom of the excavator is a
single tube approximately 20m long. Finite element method
was applied in calculations and the results are presented in
the paper. The first calculation was performed for two load
cases. One case was for the complete usage of engine
power (the worst case) and the other was static analysis
based on the inertial load of the bucket wheel and the drive
group. Measurements of deformations and vibrations on the
bucket wheel boom were performing during process of
digging. Strain and stress measurements were obtained
using inductive sensors and eddy current sensors. These
sensors measure the change in length between the magnets
placed on the measuring points. Experiments and
calculations gave the same results that show the negative
effect of dynamic forces acting on a boom. Earlier this year
the crack was discovered in a cylindrical root of the tube
nearly 270 of its scope. Previously derived calculations
and measurements didn’t indicate the possibility of the
crack appearance. Therefore, additional simulations of
load were performed (horizontal and vertical unit loads)
that could cause the crack. Numerical analysis has shown
that the horizontal force in the amount of 1000 kN could
cause such a large crack.
C3  - The 14th International Conference New Trends in Fatigue and Fracture NT2F14 „Fatigue and fracture at all scales“
T1  - Diagnosis the cause of the crack on the bucket wheel boom on the excavator ERs 1250 Gacko
UR  - https://hdl.handle.net/21.15107/rcub_machinery_5997
ER  - 

@conference{
author = "Maneski, Taško and Ignjatović, Dragan and Daničić, Darko and Milošević-Mitić, Vesna and Jovančić, Predrag and Petrović, Ana",
year = "2014",
abstract = "Bucket wheel excavator ERs 1250 in Gacko has worked
for over 30 years. Excavator was working in very difficult
conditions because it was exploited very solid material
which negatively affected the dynamic behavior of the
whole structure. Bucket wheel boom of the excavator is a
single tube approximately 20m long. Finite element method
was applied in calculations and the results are presented in
the paper. The first calculation was performed for two load
cases. One case was for the complete usage of engine
power (the worst case) and the other was static analysis
based on the inertial load of the bucket wheel and the drive
group. Measurements of deformations and vibrations on the
bucket wheel boom were performing during process of
digging. Strain and stress measurements were obtained
using inductive sensors and eddy current sensors. These
sensors measure the change in length between the magnets
placed on the measuring points. Experiments and
calculations gave the same results that show the negative
effect of dynamic forces acting on a boom. Earlier this year
the crack was discovered in a cylindrical root of the tube
nearly 270 of its scope. Previously derived calculations
and measurements didn’t indicate the possibility of the
crack appearance. Therefore, additional simulations of
load were performed (horizontal and vertical unit loads)
that could cause the crack. Numerical analysis has shown
that the horizontal force in the amount of 1000 kN could
cause such a large crack.",
journal = "The 14th International Conference New Trends in Fatigue and Fracture NT2F14 „Fatigue and fracture at all scales“",
title = "Diagnosis the cause of the crack on the bucket wheel boom on the excavator ERs 1250 Gacko",
url = "https://hdl.handle.net/21.15107/rcub_machinery_5997"
}

Maneski, T., Ignjatović, D., Daničić, D., Milošević-Mitić, V., Jovančić, P.,& Petrović, A.. (2014). Diagnosis the cause of the crack on the bucket wheel boom on the excavator ERs 1250 Gacko. in The 14th International Conference New Trends in Fatigue and Fracture NT2F14 „Fatigue and fracture at all scales“.
https://hdl.handle.net/21.15107/rcub_machinery_5997

Maneski T, Ignjatović D, Daničić D, Milošević-Mitić V, Jovančić P, Petrović A. Diagnosis the cause of the crack on the bucket wheel boom on the excavator ERs 1250 Gacko. in The 14th International Conference New Trends in Fatigue and Fracture NT2F14 „Fatigue and fracture at all scales“. 2014;.
https://hdl.handle.net/21.15107/rcub_machinery_5997 .

Maneski, Taško, Ignjatović, Dragan, Daničić, Darko, Milošević-Mitić, Vesna, Jovančić, Predrag, Petrović, Ana, "Diagnosis the cause of the crack on the bucket wheel boom on the excavator ERs 1250 Gacko" in The 14th International Conference New Trends in Fatigue and Fracture NT2F14 „Fatigue and fracture at all scales“ (2014),
https://hdl.handle.net/21.15107/rcub_machinery_5997 .

TY  - JOUR
AU  - Daničić, Darko
AU  - Sedmak, Stojan
AU  - Blačić, Ivo
AU  - Kirin, Snežana
PY  - 2013
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/1643
AB  - Produženi rad rotorskog bagera (BWE) u teškim radnim uslovima može dovesti do otkaza mašina. Kod veoma važnih elemenata konstrukcije, može dovesti do katastrofalnog loma. Lociranje važnih elemenata konstrukcije je od vitalnog značaja za životni vek BWE, počev od projektovanja i izgradnje, pa do funkcionisanja i održavanja. Ovde je razmotren primer skorašnjeg otkaza jednog BWE koji je izazvao složeni lom, sastavljen iz zamora i konačnog ubrzanog loma. Mogući scenario ukazuje da je lom započeo iz jednog malog elementa usled grešaka uvedenih u zavarene spojeve lošeg kvaliteta, čiji je značaj potcenjen u konstrukciji u datim radnim uslovima i primenjenog opterećenja.
AB  - Continued service of BWE in severe working conditions may result in machine failure. In case of important structural elements it might lead to a large-scale breakdown. The allocation of structurally significant elements is of vital importance for the lifecycle of BWE, starting from design and construction, through operation and maintenance. The example of recent failure of one BWE caused by complex fracture, consisting of fatigue and final fast fracture is here considered. A possible scenario indicated that fracture has started from a small element due to defects introduced by poor quality of welded joints whose significance in the structure has been underestimated in the given operating conditions and applied loading.
PB  - Institut za ispitivanje materijala, Beograd
T2  - Integritet i vek konstrukcija
T1  - Scenario razvoja loma u rotorskom bageru
T1  - Scenario of fracture development in bucket wheel excavator
EP  - 196
IS  - 3
SP  - 189
VL  - 13
UR  - https://hdl.handle.net/21.15107/rcub_machinery_1643
ER  - 

@article{
author = "Daničić, Darko and Sedmak, Stojan and Blačić, Ivo and Kirin, Snežana",
year = "2013",
abstract = "Produženi rad rotorskog bagera (BWE) u teškim radnim uslovima može dovesti do otkaza mašina. Kod veoma važnih elemenata konstrukcije, može dovesti do katastrofalnog loma. Lociranje važnih elemenata konstrukcije je od vitalnog značaja za životni vek BWE, počev od projektovanja i izgradnje, pa do funkcionisanja i održavanja. Ovde je razmotren primer skorašnjeg otkaza jednog BWE koji je izazvao složeni lom, sastavljen iz zamora i konačnog ubrzanog loma. Mogući scenario ukazuje da je lom započeo iz jednog malog elementa usled grešaka uvedenih u zavarene spojeve lošeg kvaliteta, čiji je značaj potcenjen u konstrukciji u datim radnim uslovima i primenjenog opterećenja., Continued service of BWE in severe working conditions may result in machine failure. In case of important structural elements it might lead to a large-scale breakdown. The allocation of structurally significant elements is of vital importance for the lifecycle of BWE, starting from design and construction, through operation and maintenance. The example of recent failure of one BWE caused by complex fracture, consisting of fatigue and final fast fracture is here considered. A possible scenario indicated that fracture has started from a small element due to defects introduced by poor quality of welded joints whose significance in the structure has been underestimated in the given operating conditions and applied loading.",
publisher = "Institut za ispitivanje materijala, Beograd",
journal = "Integritet i vek konstrukcija",
title = "Scenario razvoja loma u rotorskom bageru, Scenario of fracture development in bucket wheel excavator",
pages = "196-189",
number = "3",
volume = "13",
url = "https://hdl.handle.net/21.15107/rcub_machinery_1643"
}

Daničić, D., Sedmak, S., Blačić, I.,& Kirin, S.. (2013). Scenario razvoja loma u rotorskom bageru. in Integritet i vek konstrukcija
Institut za ispitivanje materijala, Beograd., 13(3), 189-196.
https://hdl.handle.net/21.15107/rcub_machinery_1643

Daničić D, Sedmak S, Blačić I, Kirin S. Scenario razvoja loma u rotorskom bageru. in Integritet i vek konstrukcija. 2013;13(3):189-196.
https://hdl.handle.net/21.15107/rcub_machinery_1643 .

Daničić, Darko, Sedmak, Stojan, Blačić, Ivo, Kirin, Snežana, "Scenario razvoja loma u rotorskom bageru" in Integritet i vek konstrukcija, 13, no. 3 (2013):189-196,
https://hdl.handle.net/21.15107/rcub_machinery_1643 .

TY  - CONF
AU  - Daničić, Darko
AU  - Maneski, Taško
PY  - 2012
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/1535
AB  - Tokom operacije, kod rotornog bagera (BWE) se razvilo nepovoljno dinamičko ponašanje, plastična deformacija i lom konstrukcije. Posle sprovedene eksperimentalne/numeričke analize, potvrđeno je rezonantno dinamičko ponašanje strele odlagača. Dodavanjem novog elementa (štapa) je povećana dinamička krutost strele odlagača, pa je došlo do poništavanja rezonantnog ponašanja. Numerički model je urađen metodom konačnih elemenata i izveden je eksperiment, merenjem vibracija na unapred utvrđenom broju karakterističnih mesta. Eksperimentom, pored ostalog, su potvrđeni rezultati numeričke analize.
AB  - During operation, the bucket wheel excavator (BWE) has developed bad dynamic behaviour, plastic deformation and structural failure. After performed experimental-numerical analysis, resonant dynamic behaviour of the discharge boom has been confirmed. Adding a new tension bar has increased the dynamic stiffness of the discharge boom, and so the resonant behaviour has also vanished. The numerical model is carried out by finite element method and the experiment is carried out by measuring the vibration on a predetermined number of characteristic locations. The experiment, among other things, has confirmed the results of the numerical analysis.
PB  - Institut za ispitivanje materijala, Beograd
C3  - Structural Integrity and Life
T1  - Lom konstrukcije strele odlagača rotornog bagera C 700 S usled dinamičkih uticaja
T1  - The structure failure of the discharge boom of bucket wheel excavator C 700 S due to dynamic effects
EP  - 46
IS  - 1
SP  - 43
VL  - 12
UR  - https://hdl.handle.net/21.15107/rcub_machinery_1535
ER  - 

@conference{
author = "Daničić, Darko and Maneski, Taško",
year = "2012",
abstract = "Tokom operacije, kod rotornog bagera (BWE) se razvilo nepovoljno dinamičko ponašanje, plastična deformacija i lom konstrukcije. Posle sprovedene eksperimentalne/numeričke analize, potvrđeno je rezonantno dinamičko ponašanje strele odlagača. Dodavanjem novog elementa (štapa) je povećana dinamička krutost strele odlagača, pa je došlo do poništavanja rezonantnog ponašanja. Numerički model je urađen metodom konačnih elemenata i izveden je eksperiment, merenjem vibracija na unapred utvrđenom broju karakterističnih mesta. Eksperimentom, pored ostalog, su potvrđeni rezultati numeričke analize., During operation, the bucket wheel excavator (BWE) has developed bad dynamic behaviour, plastic deformation and structural failure. After performed experimental-numerical analysis, resonant dynamic behaviour of the discharge boom has been confirmed. Adding a new tension bar has increased the dynamic stiffness of the discharge boom, and so the resonant behaviour has also vanished. The numerical model is carried out by finite element method and the experiment is carried out by measuring the vibration on a predetermined number of characteristic locations. The experiment, among other things, has confirmed the results of the numerical analysis.",
publisher = "Institut za ispitivanje materijala, Beograd",
journal = "Structural Integrity and Life",
title = "Lom konstrukcije strele odlagača rotornog bagera C 700 S usled dinamičkih uticaja, The structure failure of the discharge boom of bucket wheel excavator C 700 S due to dynamic effects",
pages = "46-43",
number = "1",
volume = "12",
url = "https://hdl.handle.net/21.15107/rcub_machinery_1535"
}

Daničić, D.,& Maneski, T.. (2012). Lom konstrukcije strele odlagača rotornog bagera C 700 S usled dinamičkih uticaja. in Structural Integrity and Life
Institut za ispitivanje materijala, Beograd., 12(1), 43-46.
https://hdl.handle.net/21.15107/rcub_machinery_1535

Daničić D, Maneski T. Lom konstrukcije strele odlagača rotornog bagera C 700 S usled dinamičkih uticaja. in Structural Integrity and Life. 2012;12(1):43-46.
https://hdl.handle.net/21.15107/rcub_machinery_1535 .

Daničić, Darko, Maneski, Taško, "Lom konstrukcije strele odlagača rotornog bagera C 700 S usled dinamičkih uticaja" in Structural Integrity and Life, 12, no. 1 (2012):43-46,
https://hdl.handle.net/21.15107/rcub_machinery_1535 .

TY  - CONF
AU  - Daničić, Darko
AU  - Maneski, Taško
AU  - Ignjatović, Dragan
AU  - Mitrović, S.
AU  - Burzić, Zijah
PY  - 2012
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/1593
AB  - Since the bucket wheel excavator SRs 1200 had crashed with bucket wheel boom heavily damaged, there was an opportunity to analyze the real structure that was in operation for past 40 years. As there are 4 more SRs 1200 bucket wheel excavators in RB Kolubara, obtained results can be of great benefit for 4 running bucket wheel excavators, as well as the revitalization of the damaged one. The following results were acquired: State of bucket wheel excavator's tension bar fatigue, operating under dynamic working conditions. This was managed by the determination of chemical mechanical properties, fracture mechanics and permanent dynamic strength parameters (Weller curve). Based on acquired results, an evaluation for remaining life assessment of materials was determined, allowing predictions for further bucket wheel excavator exploitation performance.
PB  - European Conference on Fracture, ECF
C3  - 19th European Conference on Fracture: Fracture Mechanics for Durability, Reliability and Safety, ECF
T1  - Determining the condition of material for tension bar bucket wheel excavator operating under dynamic working conditions
UR  - https://hdl.handle.net/21.15107/rcub_machinery_1593
ER  - 

@conference{
author = "Daničić, Darko and Maneski, Taško and Ignjatović, Dragan and Mitrović, S. and Burzić, Zijah",
year = "2012",
abstract = "Since the bucket wheel excavator SRs 1200 had crashed with bucket wheel boom heavily damaged, there was an opportunity to analyze the real structure that was in operation for past 40 years. As there are 4 more SRs 1200 bucket wheel excavators in RB Kolubara, obtained results can be of great benefit for 4 running bucket wheel excavators, as well as the revitalization of the damaged one. The following results were acquired: State of bucket wheel excavator's tension bar fatigue, operating under dynamic working conditions. This was managed by the determination of chemical mechanical properties, fracture mechanics and permanent dynamic strength parameters (Weller curve). Based on acquired results, an evaluation for remaining life assessment of materials was determined, allowing predictions for further bucket wheel excavator exploitation performance.",
publisher = "European Conference on Fracture, ECF",
journal = "19th European Conference on Fracture: Fracture Mechanics for Durability, Reliability and Safety, ECF",
title = "Determining the condition of material for tension bar bucket wheel excavator operating under dynamic working conditions",
url = "https://hdl.handle.net/21.15107/rcub_machinery_1593"
}

Daničić, D., Maneski, T., Ignjatović, D., Mitrović, S.,& Burzić, Z.. (2012). Determining the condition of material for tension bar bucket wheel excavator operating under dynamic working conditions. in 19th European Conference on Fracture: Fracture Mechanics for Durability, Reliability and Safety, ECF
European Conference on Fracture, ECF..
https://hdl.handle.net/21.15107/rcub_machinery_1593

Daničić D, Maneski T, Ignjatović D, Mitrović S, Burzić Z. Determining the condition of material for tension bar bucket wheel excavator operating under dynamic working conditions. in 19th European Conference on Fracture: Fracture Mechanics for Durability, Reliability and Safety, ECF. 2012;.
https://hdl.handle.net/21.15107/rcub_machinery_1593 .

Daničić, Darko, Maneski, Taško, Ignjatović, Dragan, Mitrović, S., Burzić, Zijah, "Determining the condition of material for tension bar bucket wheel excavator operating under dynamic working conditions" in 19th European Conference on Fracture: Fracture Mechanics for Durability, Reliability and Safety, ECF (2012),
https://hdl.handle.net/21.15107/rcub_machinery_1593 .

TY  - JOUR
AU  - Milović, Ljubica
AU  - Vuherer, Tomaž
AU  - Radaković, Zoran
AU  - Zrilić, Milorad
AU  - Daničić, Darko
AU  - Petrovski, Blagoj
AU  - Janković, Miodrag
PY  - 2011
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/4962
AB  - The structural integrity and operational safety of welded pressure vessels primarily depends on the behaviour of weldments. In spite of all efforts in material production and improvements in welding techniques, including strict codes, requirements and directives, the crack occurrence in welded structures cannot be completely excluded. This is why fracture mechanics analysis is inevitable in the structural integrity assessment of all welded structures. Examples of practical application of fracture mechanics parameters in cracked pressure vessel structural integrity are considered. This paper shows the determination of parameters of the fatigue crack for constituents of welded joints produced of high strength low alloyed steel Nionikral-70 (yield strength 700 MPa). Results have shown that the position of notch and crack initiation affect the values of the stress intensity range of fatigue threshold ΔKth and parameters in the Paris’ equation.
AB  - Integritet konstrukcije i sigurnost u radu zavarenih posuda pod pritiskom uglavnom zavisi od ponašanja zavarenih spojeva. Pored svih uloženih napora u proizvodnji i poboljšanja postupaka zavarivanja, uključujući i stroge standarde, zahteve i smernice, pojava prslina u zavarenim konstrukcijama se ne može u potpunosti izbeći. Zato je analiza mehanike loma neophodna u proceni integriteta svih zavarenih konstrukcija. Razmotreni su primeri praktične primene parametara mehanike loma u integritetu posuda pod pritiskom sa prslinom. Rad prikazuje određivanje parametara zamorne prsline za konstituente zavarenih spojeva izrađenih od niskolegiranog čelika povišene čvrstoće Nionikral-70 (napona tečenja 700 MPa). Rezultati pokazuju da položaj zareza i inicijacija prsline utiču na vrednosti raspona napona za granicu zamora ΔKth i na parametre Parisove relacije.
PB  - Society for Structural Integrity and Life (Društvo za integritet i vek konstrukcija, DIVK)
PB  - Institut za ispitivanje materijala (IMS), Beograd
T2  - Structural Integrity and Life (Integritet i vek konstrukcija)
T1  - Determination of fatigue crack growth parameters in welded joint of HSLA steel
T1  - Određivanje parametara zamornog rasta prsline kod zavarenih spojeva od HSLA čelika
EP  - 187
IS  - 3
SP  - 183
VL  - 11
UR  - https://hdl.handle.net/21.15107/rcub_machinery_4962
ER  - 

@article{
author = "Milović, Ljubica and Vuherer, Tomaž and Radaković, Zoran and Zrilić, Milorad and Daničić, Darko and Petrovski, Blagoj and Janković, Miodrag",
year = "2011",
abstract = "The structural integrity and operational safety of welded pressure vessels primarily depends on the behaviour of weldments. In spite of all efforts in material production and improvements in welding techniques, including strict codes, requirements and directives, the crack occurrence in welded structures cannot be completely excluded. This is why fracture mechanics analysis is inevitable in the structural integrity assessment of all welded structures. Examples of practical application of fracture mechanics parameters in cracked pressure vessel structural integrity are considered. This paper shows the determination of parameters of the fatigue crack for constituents of welded joints produced of high strength low alloyed steel Nionikral-70 (yield strength 700 MPa). Results have shown that the position of notch and crack initiation affect the values of the stress intensity range of fatigue threshold ΔKth and parameters in the Paris’ equation., Integritet konstrukcije i sigurnost u radu zavarenih posuda pod pritiskom uglavnom zavisi od ponašanja zavarenih spojeva. Pored svih uloženih napora u proizvodnji i poboljšanja postupaka zavarivanja, uključujući i stroge standarde, zahteve i smernice, pojava prslina u zavarenim konstrukcijama se ne može u potpunosti izbeći. Zato je analiza mehanike loma neophodna u proceni integriteta svih zavarenih konstrukcija. Razmotreni su primeri praktične primene parametara mehanike loma u integritetu posuda pod pritiskom sa prslinom. Rad prikazuje određivanje parametara zamorne prsline za konstituente zavarenih spojeva izrađenih od niskolegiranog čelika povišene čvrstoće Nionikral-70 (napona tečenja 700 MPa). Rezultati pokazuju da položaj zareza i inicijacija prsline utiču na vrednosti raspona napona za granicu zamora ΔKth i na parametre Parisove relacije.",
publisher = "Society for Structural Integrity and Life (Društvo za integritet i vek konstrukcija, DIVK), Institut za ispitivanje materijala (IMS), Beograd",
journal = "Structural Integrity and Life (Integritet i vek konstrukcija)",
title = "Determination of fatigue crack growth parameters in welded joint of HSLA steel, Određivanje parametara zamornog rasta prsline kod zavarenih spojeva od HSLA čelika",
pages = "187-183",
number = "3",
volume = "11",
url = "https://hdl.handle.net/21.15107/rcub_machinery_4962"
}

Milović, L., Vuherer, T., Radaković, Z., Zrilić, M., Daničić, D., Petrovski, B.,& Janković, M.. (2011). Determination of fatigue crack growth parameters in welded joint of HSLA steel. in Structural Integrity and Life (Integritet i vek konstrukcija)
Society for Structural Integrity and Life (Društvo za integritet i vek konstrukcija, DIVK)., 11(3), 183-187.
https://hdl.handle.net/21.15107/rcub_machinery_4962

Milović L, Vuherer T, Radaković Z, Zrilić M, Daničić D, Petrovski B, Janković M. Determination of fatigue crack growth parameters in welded joint of HSLA steel. in Structural Integrity and Life (Integritet i vek konstrukcija). 2011;11(3):183-187.
https://hdl.handle.net/21.15107/rcub_machinery_4962 .

Milović, Ljubica, Vuherer, Tomaž, Radaković, Zoran, Zrilić, Milorad, Daničić, Darko, Petrovski, Blagoj, Janković, Miodrag, "Determination of fatigue crack growth parameters in welded joint of HSLA steel" in Structural Integrity and Life (Integritet i vek konstrukcija), 11, no. 3 (2011):183-187,
https://hdl.handle.net/21.15107/rcub_machinery_4962 .

TY  - CONF
AU  - Milović, Ljubica
AU  - Vuherer, Tomaž
AU  - Radaković, Zoran
AU  - Petrovski, Blagoj
AU  - Janković, Miodrag
AU  - Zrilić, Milorad
AU  - Daničić, Darko
PY  - 2011
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/1287
AB  - Integritet konstrukcije i sigurnost u radu zavarenih posuda pod pritiskom uglavnom zavisi od ponašanja zavarenih spojeva. Pored svih uloženih napora u proizvodnji i poboljšanja postupaka zavarivanja, uključujući i stroge standarde, zahteve i smernice, pojava prslina u zavarenim konstrukcijama se ne može u potpunosti izbeći. Zato je analiza mehanike loma neophodna u proceni integriteta svih zavarenih konstrukcija. Razmotreni su primeri praktične primene parametara mehanike loma u integritetu posuda pod pritiskom sa prslinom. Rad prikazuje određivanje parametara zamorne prsline za konstituente zavarenih spojeva izrađenih od niskolegiranog čelika povišene čvrstoće Nionikral-70 (napona tečenja 700 MPa). Rezultati pokazuju da položaj zareza i inicijacija prsline utiču na vrednosti raspona napona za granicu zamora DKth i na parametre Parisove relacije.
AB  - The structural integrity and operational safety of welded pressure vessels primarily depends on the behaviour of weldments. In spite of all efforts in material production and improvements in welding techniques, including strict codes, requirements and directives, the crack occurrence in welded structures cannot be completely excluded. This is why fracture mechanics analysis is inevitable in the structural integrity assessment of all welded structures. Examples of practical application of fracture mechanics parameters in cracked pressure vessel structural integrity are considered. This paper shows the determination of parameters of the fatigue crack for constituents of welded joints produced of high strength low alloyed steel Nionikral-70 (yield strength 700 MPa). Results have shown that the position of notch and crack initiation affect the values of the stress intensity range of fatigue threshold DKth and parameters in the Paris' equation.
PB  - Institut za ispitivanje materijala, Beograd
C3  - Structural Integrity and Life
T1  - Određivanje parametara zamornog rasta prsline kod zavarenih spojeva od HSLA čelika
T1  - Determination of fatigue crack growth parameters in welded joint of HSLA steel
EP  - 187
IS  - 3
SP  - 183
VL  - 11
UR  - https://hdl.handle.net/21.15107/rcub_technorep_1840
ER  - 

@conference{
author = "Milović, Ljubica and Vuherer, Tomaž and Radaković, Zoran and Petrovski, Blagoj and Janković, Miodrag and Zrilić, Milorad and Daničić, Darko",
year = "2011",
abstract = "Integritet konstrukcije i sigurnost u radu zavarenih posuda pod pritiskom uglavnom zavisi od ponašanja zavarenih spojeva. Pored svih uloženih napora u proizvodnji i poboljšanja postupaka zavarivanja, uključujući i stroge standarde, zahteve i smernice, pojava prslina u zavarenim konstrukcijama se ne može u potpunosti izbeći. Zato je analiza mehanike loma neophodna u proceni integriteta svih zavarenih konstrukcija. Razmotreni su primeri praktične primene parametara mehanike loma u integritetu posuda pod pritiskom sa prslinom. Rad prikazuje određivanje parametara zamorne prsline za konstituente zavarenih spojeva izrađenih od niskolegiranog čelika povišene čvrstoće Nionikral-70 (napona tečenja 700 MPa). Rezultati pokazuju da položaj zareza i inicijacija prsline utiču na vrednosti raspona napona za granicu zamora DKth i na parametre Parisove relacije., The structural integrity and operational safety of welded pressure vessels primarily depends on the behaviour of weldments. In spite of all efforts in material production and improvements in welding techniques, including strict codes, requirements and directives, the crack occurrence in welded structures cannot be completely excluded. This is why fracture mechanics analysis is inevitable in the structural integrity assessment of all welded structures. Examples of practical application of fracture mechanics parameters in cracked pressure vessel structural integrity are considered. This paper shows the determination of parameters of the fatigue crack for constituents of welded joints produced of high strength low alloyed steel Nionikral-70 (yield strength 700 MPa). Results have shown that the position of notch and crack initiation affect the values of the stress intensity range of fatigue threshold DKth and parameters in the Paris' equation.",
publisher = "Institut za ispitivanje materijala, Beograd",
journal = "Structural Integrity and Life",
title = "Određivanje parametara zamornog rasta prsline kod zavarenih spojeva od HSLA čelika, Determination of fatigue crack growth parameters in welded joint of HSLA steel",
pages = "187-183",
number = "3",
volume = "11",
url = "https://hdl.handle.net/21.15107/rcub_technorep_1840"
}

Milović, L., Vuherer, T., Radaković, Z., Petrovski, B., Janković, M., Zrilić, M.,& Daničić, D.. (2011). Određivanje parametara zamornog rasta prsline kod zavarenih spojeva od HSLA čelika. in Structural Integrity and Life
Institut za ispitivanje materijala, Beograd., 11(3), 183-187.
https://hdl.handle.net/21.15107/rcub_technorep_1840

Milović L, Vuherer T, Radaković Z, Petrovski B, Janković M, Zrilić M, Daničić D. Određivanje parametara zamornog rasta prsline kod zavarenih spojeva od HSLA čelika. in Structural Integrity and Life. 2011;11(3):183-187.
https://hdl.handle.net/21.15107/rcub_technorep_1840 .

Milović, Ljubica, Vuherer, Tomaž, Radaković, Zoran, Petrovski, Blagoj, Janković, Miodrag, Zrilić, Milorad, Daničić, Darko, "Određivanje parametara zamornog rasta prsline kod zavarenih spojeva od HSLA čelika" in Structural Integrity and Life, 11, no. 3 (2011):183-187,
https://hdl.handle.net/21.15107/rcub_technorep_1840 .

TY  - JOUR
AU  - Daničić, Darko
AU  - Maneski, Taško
AU  - Ignjatović, Dragan
PY  - 2010
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/1090
AB  - Površinski kopovi u Srbiji su osnova proizvodnje uglja, što opravdava usmerenje aktivnosti na neprekidni rad i održavanje mašina i uređaja za površinsku eksploataciju. Složenost konstrukcije rotornih bagera i drugih rudarskih mašina (odlagača, samohodnih transportera), njihova visoka cena, i visoki troškovi otkaza i održavanja, ukazuju na potrebu istraživanja i razvoja efikasnog sistema za dijagnostiku. U ovom radu su definisani postupak i razvoj integralnog modela sistema za dijagnostiku stanja i ponašanja čelične konstrukcije rudarskih mašina, što omogućava donošenje odluke o daljim akcijama vezanim za njihov rad (praćenje stanja, nastavak rada bez intervencija, revitalizacija, modernizacija, rekonstrukcija ili otpis). Rezultat ovih istraživanja je sistem procedura i njihovih međusobnih odnosa u cilju dobijanja podataka koji definišu stanje rudarske opreme i način daljeg delovanja.
AB  - Surface mines in Serbia are the basis of coal production, justifying to focus the activities on continuous operation and maintenance of machinery and equipment for surface mining. Structural complexity of bucket wheel excavators and other mining machinery (spreaders, belt wagons), their high prices and high costs of failures and maintenance indicate the need to research and develop an efficient diagnostics system. The article defines the methods and development of the model of an integrated system for state diagnostics and behaviour of mining machine steel structures, enabling to decide on further actions for their operation (state monitoring, to continue operation without intervention, retrofit, updating, redesign or amortisation). The result of this research is a system of procedures and their mutual relations with the aim to obtain data on defining the mining equipment state and mode of further treatment.
PB  - Institut za ispitivanje materijala, Beograd
T2  - Integritet i vek konstrukcija
T1  - Dijagnostika stanja i ponašanja čelične konstrukcije rotornih bagera
T1  - Structural diagnostics and behaviour of bucket wheel excavator
EP  - 59
IS  - 1
SP  - 53
VL  - 10
UR  - https://hdl.handle.net/21.15107/rcub_machinery_1090
ER  - 

@article{
author = "Daničić, Darko and Maneski, Taško and Ignjatović, Dragan",
year = "2010",
abstract = "Površinski kopovi u Srbiji su osnova proizvodnje uglja, što opravdava usmerenje aktivnosti na neprekidni rad i održavanje mašina i uređaja za površinsku eksploataciju. Složenost konstrukcije rotornih bagera i drugih rudarskih mašina (odlagača, samohodnih transportera), njihova visoka cena, i visoki troškovi otkaza i održavanja, ukazuju na potrebu istraživanja i razvoja efikasnog sistema za dijagnostiku. U ovom radu su definisani postupak i razvoj integralnog modela sistema za dijagnostiku stanja i ponašanja čelične konstrukcije rudarskih mašina, što omogućava donošenje odluke o daljim akcijama vezanim za njihov rad (praćenje stanja, nastavak rada bez intervencija, revitalizacija, modernizacija, rekonstrukcija ili otpis). Rezultat ovih istraživanja je sistem procedura i njihovih međusobnih odnosa u cilju dobijanja podataka koji definišu stanje rudarske opreme i način daljeg delovanja., Surface mines in Serbia are the basis of coal production, justifying to focus the activities on continuous operation and maintenance of machinery and equipment for surface mining. Structural complexity of bucket wheel excavators and other mining machinery (spreaders, belt wagons), their high prices and high costs of failures and maintenance indicate the need to research and develop an efficient diagnostics system. The article defines the methods and development of the model of an integrated system for state diagnostics and behaviour of mining machine steel structures, enabling to decide on further actions for their operation (state monitoring, to continue operation without intervention, retrofit, updating, redesign or amortisation). The result of this research is a system of procedures and their mutual relations with the aim to obtain data on defining the mining equipment state and mode of further treatment.",
publisher = "Institut za ispitivanje materijala, Beograd",
journal = "Integritet i vek konstrukcija",
title = "Dijagnostika stanja i ponašanja čelične konstrukcije rotornih bagera, Structural diagnostics and behaviour of bucket wheel excavator",
pages = "59-53",
number = "1",
volume = "10",
url = "https://hdl.handle.net/21.15107/rcub_machinery_1090"
}

Daničić, D., Maneski, T.,& Ignjatović, D.. (2010). Dijagnostika stanja i ponašanja čelične konstrukcije rotornih bagera. in Integritet i vek konstrukcija
Institut za ispitivanje materijala, Beograd., 10(1), 53-59.
https://hdl.handle.net/21.15107/rcub_machinery_1090

Daničić D, Maneski T, Ignjatović D. Dijagnostika stanja i ponašanja čelične konstrukcije rotornih bagera. in Integritet i vek konstrukcija. 2010;10(1):53-59.
https://hdl.handle.net/21.15107/rcub_machinery_1090 .

Daničić, Darko, Maneski, Taško, Ignjatović, Dragan, "Dijagnostika stanja i ponašanja čelične konstrukcije rotornih bagera" in Integritet i vek konstrukcija, 10, no. 1 (2010):53-59,
https://hdl.handle.net/21.15107/rcub_machinery_1090 .

TY  - JOUR
AU  - Daničić, Darko
AU  - Jovančić, Predrag
AU  - Ignjatović, Dragan
AU  - Maneski, Taško
PY  - 2009
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/907
AB  - Dijagnostika stanja i ponašanja je od presudnog značaja za donošenje pravilnog stava o radu i održavanju rotornog bagera, odnosno svih komponenti bagera, od čelične konstrukcije pa do pogonskih grupa. Da bi jedan rotorni bager zadržao ili poboljšao svoje performanse u određenom vremenskom intervalu, mora proći kroz revitalizacione procese koji su bazirani na različitim dijagnostičkim metodama ispitivanja. Pojedine metode ispitivanja biće prikazane u ovom radu. Realizovano je nekoliko projekata sa aspekta rekonstrukcija i revitalizacija rotornih bagera kako na kostolačkim, tako i na kolubarskim kopovima. Naveden je samo jedan broj izvedenih projekata koji su podigli ili u krajnjem slučaju zadržali performanse bagera u cilju što boljeg kapacitetnog i vremenskog iskorišćenja osnovne rudarske mehanizacije.
AB  - Diagnostics of condition and behavior is of crucial importance regarding proper decision on operation and maintenance of bucket wheel excavator including all of its components (from steel structure to engines-drives). In order preserve or improve performances within certain time interval bucket wheel excavator must be subjected to revitalization processes which are based on various methods of diagnostics examination. Some of these methods are presented in this paper. Several projects are completed on topic of reconstruction and revitalization of bucket wheel excavators, both on Kostolac and Kolubara open pits. Only few of these projects are presented ones which achieved improved or at least preserved performances of the excavators, regarding their higher production rate and time utilization of main mining equipment.
PB  - Savez inženjera i tehničara Srbije, Beograd
T2  - Tehnika - Rudarstvo, geologija i metalurgija
T1  - Unapređenje održavanja dijagnostikovanjem stanja i ponašanja rotornih bagera on-line i off-line metodom
T1  - Improvement of bucket wheel excavator maintenance by on-line and off-line method of condition and behavior diagnostics
EP  - 14
IS  - 3
SP  - 9
VL  - 60
UR  - https://hdl.handle.net/21.15107/rcub_machinery_907
ER  - 

@article{
author = "Daničić, Darko and Jovančić, Predrag and Ignjatović, Dragan and Maneski, Taško",
year = "2009",
abstract = "Dijagnostika stanja i ponašanja je od presudnog značaja za donošenje pravilnog stava o radu i održavanju rotornog bagera, odnosno svih komponenti bagera, od čelične konstrukcije pa do pogonskih grupa. Da bi jedan rotorni bager zadržao ili poboljšao svoje performanse u određenom vremenskom intervalu, mora proći kroz revitalizacione procese koji su bazirani na različitim dijagnostičkim metodama ispitivanja. Pojedine metode ispitivanja biće prikazane u ovom radu. Realizovano je nekoliko projekata sa aspekta rekonstrukcija i revitalizacija rotornih bagera kako na kostolačkim, tako i na kolubarskim kopovima. Naveden je samo jedan broj izvedenih projekata koji su podigli ili u krajnjem slučaju zadržali performanse bagera u cilju što boljeg kapacitetnog i vremenskog iskorišćenja osnovne rudarske mehanizacije., Diagnostics of condition and behavior is of crucial importance regarding proper decision on operation and maintenance of bucket wheel excavator including all of its components (from steel structure to engines-drives). In order preserve or improve performances within certain time interval bucket wheel excavator must be subjected to revitalization processes which are based on various methods of diagnostics examination. Some of these methods are presented in this paper. Several projects are completed on topic of reconstruction and revitalization of bucket wheel excavators, both on Kostolac and Kolubara open pits. Only few of these projects are presented ones which achieved improved or at least preserved performances of the excavators, regarding their higher production rate and time utilization of main mining equipment.",
publisher = "Savez inženjera i tehničara Srbije, Beograd",
journal = "Tehnika - Rudarstvo, geologija i metalurgija",
title = "Unapređenje održavanja dijagnostikovanjem stanja i ponašanja rotornih bagera on-line i off-line metodom, Improvement of bucket wheel excavator maintenance by on-line and off-line method of condition and behavior diagnostics",
pages = "14-9",
number = "3",
volume = "60",
url = "https://hdl.handle.net/21.15107/rcub_machinery_907"
}

Daničić, D., Jovančić, P., Ignjatović, D.,& Maneski, T.. (2009). Unapređenje održavanja dijagnostikovanjem stanja i ponašanja rotornih bagera on-line i off-line metodom. in Tehnika - Rudarstvo, geologija i metalurgija
Savez inženjera i tehničara Srbije, Beograd., 60(3), 9-14.
https://hdl.handle.net/21.15107/rcub_machinery_907

Daničić D, Jovančić P, Ignjatović D, Maneski T. Unapređenje održavanja dijagnostikovanjem stanja i ponašanja rotornih bagera on-line i off-line metodom. in Tehnika - Rudarstvo, geologija i metalurgija. 2009;60(3):9-14.
https://hdl.handle.net/21.15107/rcub_machinery_907 .

Daničić, Darko, Jovančić, Predrag, Ignjatović, Dragan, Maneski, Taško, "Unapređenje održavanja dijagnostikovanjem stanja i ponašanja rotornih bagera on-line i off-line metodom" in Tehnika - Rudarstvo, geologija i metalurgija, 60, no. 3 (2009):9-14,
https://hdl.handle.net/21.15107/rcub_machinery_907 .

TY  - JOUR
AU  - Maneski, Taško
AU  - Bošnjak, Stevo
AU  - Daničić, Darko
PY  - 2003
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/351
AB  - U radu je prikazana analiza popuštanja prstena oslonca br. 3 rotacione peći u FC, Beočin. Analiza popuštanja izvedena je primenom numeričke metode konačnih elemenata i razvijene metodologije dijagnostike ponašanja i popuštanja čvrstoće konstrukcije. Pored određivanja uzroka popuštanja prstena oslonca, određen je i uticaj rasta prsline na ponašanje konstrukcije.
AB  - The paper deals with the analysis of behavior of the support rotary furnace in the cement factory of Beočin. The analysis of slackening was performed by applying the finite element method and the developed methodology for diagnosing the behaviour and slackening of the construction hardness. In addition to the determination of causes for the support ring slackening, the influence of the crack increase on the construction behavior was determined.
PB  - Savez mašinskih i elektrotehničkih inženjera i tehničara Srbije (SMEITS), Beograd
T2  - Procesna tehnika
T1  - Analiza popuštanja prstena oslonca rotacione peći u fabrici cementa u Beočinu
T1  - Analysis of behavior of the support ring of the rotary furnace in the cement factory of Beočin
EP  - 85
IS  - 1
SP  - 82
VL  - 19
UR  - https://hdl.handle.net/21.15107/rcub_machinery_351
ER  - 

@article{
author = "Maneski, Taško and Bošnjak, Stevo and Daničić, Darko",
year = "2003",
abstract = "U radu je prikazana analiza popuštanja prstena oslonca br. 3 rotacione peći u FC, Beočin. Analiza popuštanja izvedena je primenom numeričke metode konačnih elemenata i razvijene metodologije dijagnostike ponašanja i popuštanja čvrstoće konstrukcije. Pored određivanja uzroka popuštanja prstena oslonca, određen je i uticaj rasta prsline na ponašanje konstrukcije., The paper deals with the analysis of behavior of the support rotary furnace in the cement factory of Beočin. The analysis of slackening was performed by applying the finite element method and the developed methodology for diagnosing the behaviour and slackening of the construction hardness. In addition to the determination of causes for the support ring slackening, the influence of the crack increase on the construction behavior was determined.",
publisher = "Savez mašinskih i elektrotehničkih inženjera i tehničara Srbije (SMEITS), Beograd",
journal = "Procesna tehnika",
title = "Analiza popuštanja prstena oslonca rotacione peći u fabrici cementa u Beočinu, Analysis of behavior of the support ring of the rotary furnace in the cement factory of Beočin",
pages = "85-82",
number = "1",
volume = "19",
url = "https://hdl.handle.net/21.15107/rcub_machinery_351"
}

Maneski, T., Bošnjak, S.,& Daničić, D.. (2003). Analiza popuštanja prstena oslonca rotacione peći u fabrici cementa u Beočinu. in Procesna tehnika
Savez mašinskih i elektrotehničkih inženjera i tehničara Srbije (SMEITS), Beograd., 19(1), 82-85.
https://hdl.handle.net/21.15107/rcub_machinery_351

Maneski T, Bošnjak S, Daničić D. Analiza popuštanja prstena oslonca rotacione peći u fabrici cementa u Beočinu. in Procesna tehnika. 2003;19(1):82-85.
https://hdl.handle.net/21.15107/rcub_machinery_351 .

Maneski, Taško, Bošnjak, Stevo, Daničić, Darko, "Analiza popuštanja prstena oslonca rotacione peći u fabrici cementa u Beočinu" in Procesna tehnika, 19, no. 1 (2003):82-85,
https://hdl.handle.net/21.15107/rcub_machinery_351 .