TY  - JOUR
AU  - Aleksić, Vujadin
AU  - Milović, Ljubica
AU  - Blačić, Ivo
AU  - Vuherer, Tomaž
AU  - Bulatović, Srđan
PY  - 2019
UR  - http://rims.institutims.rs/handle/123456789/354
AB  - Numerous structural components made of high strength low-alloyed steels are often exposed to low-cycle fatigue loading during their exploitation life. In order to study the fatigue behavior of one grade of structural steels produced in Yugoslavia during the eighties of the last century, a push-pull constant amplitude strain-controlled fatigue tests were conducted at room temperatures. This paper analyses behavior of two different materials, parent steel (PM) and its coarse-grained (CG) simulated heat-affected zone (SHAZ) exposed to the action of low-cycle fatigue (LCF) loading performed in the range from 1 to 10(4) cycles. LCF tests were conducted at strain ratio R = -1 at strain amplitude range from 0.3% to 0.8%. The materials' Coffin-Manson parameters appearing in the strain-life and cyclic stress-strain curves were calculated. Fracture surface analysis of both materials was done. The results showed that plasticity under dynamic load conditions is satisfactory for both materials which give them good resistance to crack initiation and propagation.
PB  - Pergamon-Elsevier Science Ltd, Oxford
T2  - Engineering Failure Analysis
T1  - Effect of LCF on behavior and microstructure of microalloyed HSLA steel and its simulated CGHAZ
EP  - 1106
SP  - 1094
VL  - 104
DO  - 10.1016/j.engfailanal.2019.06.017
ER  - 

@article{
author = "Aleksić, Vujadin and Milović, Ljubica and Blačić, Ivo and Vuherer, Tomaž and Bulatović, Srđan",
year = "2019",
abstract = "Numerous structural components made of high strength low-alloyed steels are often exposed to low-cycle fatigue loading during their exploitation life. In order to study the fatigue behavior of one grade of structural steels produced in Yugoslavia during the eighties of the last century, a push-pull constant amplitude strain-controlled fatigue tests were conducted at room temperatures. This paper analyses behavior of two different materials, parent steel (PM) and its coarse-grained (CG) simulated heat-affected zone (SHAZ) exposed to the action of low-cycle fatigue (LCF) loading performed in the range from 1 to 10(4) cycles. LCF tests were conducted at strain ratio R = -1 at strain amplitude range from 0.3% to 0.8%. The materials' Coffin-Manson parameters appearing in the strain-life and cyclic stress-strain curves were calculated. Fracture surface analysis of both materials was done. The results showed that plasticity under dynamic load conditions is satisfactory for both materials which give them good resistance to crack initiation and propagation.",
publisher = "Pergamon-Elsevier Science Ltd, Oxford",
journal = "Engineering Failure Analysis",
title = "Effect of LCF on behavior and microstructure of microalloyed HSLA steel and its simulated CGHAZ",
pages = "1106-1094",
volume = "104",
doi = "10.1016/j.engfailanal.2019.06.017"
}

Aleksić, V., Milović, L., Blačić, I., Vuherer, T.,& Bulatović, S.. (2019). Effect of LCF on behavior and microstructure of microalloyed HSLA steel and its simulated CGHAZ. in Engineering Failure Analysis
Pergamon-Elsevier Science Ltd, Oxford., 104, 1094-1106.
https://doi.org/10.1016/j.engfailanal.2019.06.017

Aleksić V, Milović L, Blačić I, Vuherer T, Bulatović S. Effect of LCF on behavior and microstructure of microalloyed HSLA steel and its simulated CGHAZ. in Engineering Failure Analysis. 2019;104:1094-1106.
doi:10.1016/j.engfailanal.2019.06.017 .

Aleksić, Vujadin, Milović, Ljubica, Blačić, Ivo, Vuherer, Tomaž, Bulatović, Srđan, "Effect of LCF on behavior and microstructure of microalloyed HSLA steel and its simulated CGHAZ" in Engineering Failure Analysis, 104 (2019):1094-1106,
https://doi.org/10.1016/j.engfailanal.2019.06.017 . .

TY  - JOUR
AU  - Momčilović, Dejan
AU  - Odanović, Zoran
AU  - Mitrović, Radivoje
AU  - Atanasovska, Ivana
AU  - Vuherer, Tomaž
PY  - 2012
UR  - http://rims.institutims.rs/handle/123456789/195
AB  - This paper describes the analysis of major failure of 28 MW horizontal hydro turbine shaft. The analysis of load carrying capacity of critical radius and fractography analysis are presented. Special emphasize is on metallurgical failure analysis of in-service crack initiation. The analysis of stresses is obtained by the finite element method and the developed model and load conditions are described. Finite element analysis is performed for case of normal service and start-up regime. Based on the failure analysis and numerical calculations, it could be concluded that the seal box design led to constant flow of river water in zone of critical radius which resulted as occurrence of corrosion fatigue cracks and major failure of turbine shaft. Suggestions for problem solution for the turbine shaft are also presented.
PB  - Pergamon-Elsevier Science Ltd, Oxford
T2  - Engineering Failure Analysis
T1  - Failure analysis of hydraulic turbine shaft
EP  - 66
SP  - 54
VL  - 20
DO  - 10.1016/j.engfailanal.2011.10.006
ER  - 

@article{
author = "Momčilović, Dejan and Odanović, Zoran and Mitrović, Radivoje and Atanasovska, Ivana and Vuherer, Tomaž",
year = "2012",
abstract = "This paper describes the analysis of major failure of 28 MW horizontal hydro turbine shaft. The analysis of load carrying capacity of critical radius and fractography analysis are presented. Special emphasize is on metallurgical failure analysis of in-service crack initiation. The analysis of stresses is obtained by the finite element method and the developed model and load conditions are described. Finite element analysis is performed for case of normal service and start-up regime. Based on the failure analysis and numerical calculations, it could be concluded that the seal box design led to constant flow of river water in zone of critical radius which resulted as occurrence of corrosion fatigue cracks and major failure of turbine shaft. Suggestions for problem solution for the turbine shaft are also presented.",
publisher = "Pergamon-Elsevier Science Ltd, Oxford",
journal = "Engineering Failure Analysis",
title = "Failure analysis of hydraulic turbine shaft",
pages = "66-54",
volume = "20",
doi = "10.1016/j.engfailanal.2011.10.006"
}

Momčilović, D., Odanović, Z., Mitrović, R., Atanasovska, I.,& Vuherer, T.. (2012). Failure analysis of hydraulic turbine shaft. in Engineering Failure Analysis
Pergamon-Elsevier Science Ltd, Oxford., 20, 54-66.
https://doi.org/10.1016/j.engfailanal.2011.10.006

Momčilović D, Odanović Z, Mitrović R, Atanasovska I, Vuherer T. Failure analysis of hydraulic turbine shaft. in Engineering Failure Analysis. 2012;20:54-66.
doi:10.1016/j.engfailanal.2011.10.006 .

Momčilović, Dejan, Odanović, Zoran, Mitrović, Radivoje, Atanasovska, Ivana, Vuherer, Tomaž, "Failure analysis of hydraulic turbine shaft" in Engineering Failure Analysis, 20 (2012):54-66,
https://doi.org/10.1016/j.engfailanal.2011.10.006 . .

TY  - JOUR
AU  - Momčilović, Dejan
AU  - Mitrović, Radivoje
AU  - Atanasovska, Ivana
AU  - Vuherer, Tomaž
PY  - 2012
UR  - http://rims.institutims.rs/handle/123456789/186
AB  - This paper describes the influence of corrosion on stress concentration factor and crack initiation at shaft flange transition section. The case study of hydraulic turbine shaft failure is used as the basis for this research. The quantification of the stress concentrators was accomplished by the usage of Theory of critical distances (TCD) in the prediction of high-cycle fatigue behavior in machine parts and systems. The stresses obtained by Finite Element Analysis, was used as an entry values for application of Theory of critical distances. The TCD represents a major extension of linear elastic fracture mechanics, allowing it to be used for short cracks as well as for stress concentrations of arbitrary geometry. Presented methodology is particular valid for machine parts of non-standard dimensions. The significance of results presented in this paper is that TCD and developed methodology can be used in preventing failures in power industry.
PB  - Univerzitet u Novom Sadu - Fakultet tehničkih nauka, Novi Sad
T2  - Machine Design
T1  - Methodology of determination the influence of corrosion pit on decrease of hydro turbine shaft fatigue life
EP  - 236
IS  - 4
SP  - 231
VL  - 4
UR  - https://hdl.handle.net/21.15107/rcub_rims_186
ER  - 

@article{
author = "Momčilović, Dejan and Mitrović, Radivoje and Atanasovska, Ivana and Vuherer, Tomaž",
year = "2012",
abstract = "This paper describes the influence of corrosion on stress concentration factor and crack initiation at shaft flange transition section. The case study of hydraulic turbine shaft failure is used as the basis for this research. The quantification of the stress concentrators was accomplished by the usage of Theory of critical distances (TCD) in the prediction of high-cycle fatigue behavior in machine parts and systems. The stresses obtained by Finite Element Analysis, was used as an entry values for application of Theory of critical distances. The TCD represents a major extension of linear elastic fracture mechanics, allowing it to be used for short cracks as well as for stress concentrations of arbitrary geometry. Presented methodology is particular valid for machine parts of non-standard dimensions. The significance of results presented in this paper is that TCD and developed methodology can be used in preventing failures in power industry.",
publisher = "Univerzitet u Novom Sadu - Fakultet tehničkih nauka, Novi Sad",
journal = "Machine Design",
title = "Methodology of determination the influence of corrosion pit on decrease of hydro turbine shaft fatigue life",
pages = "236-231",
number = "4",
volume = "4",
url = "https://hdl.handle.net/21.15107/rcub_rims_186"
}

Momčilović, D., Mitrović, R., Atanasovska, I.,& Vuherer, T.. (2012). Methodology of determination the influence of corrosion pit on decrease of hydro turbine shaft fatigue life. in Machine Design
Univerzitet u Novom Sadu - Fakultet tehničkih nauka, Novi Sad., 4(4), 231-236.
https://hdl.handle.net/21.15107/rcub_rims_186

Momčilović D, Mitrović R, Atanasovska I, Vuherer T. Methodology of determination the influence of corrosion pit on decrease of hydro turbine shaft fatigue life. in Machine Design. 2012;4(4):231-236.
https://hdl.handle.net/21.15107/rcub_rims_186 .

Momčilović, Dejan, Mitrović, Radivoje, Atanasovska, Ivana, Vuherer, Tomaž, "Methodology of determination the influence of corrosion pit on decrease of hydro turbine shaft fatigue life" in Machine Design, 4, no. 4 (2012):231-236,
https://hdl.handle.net/21.15107/rcub_rims_186 .

TY  - JOUR
AU  - Atanasovska, Ivana
AU  - Momčilović, Dejan
AU  - Burzić, Meri
AU  - Vuherer, Tomaž
PY  - 2012
UR  - http://rims.institutims.rs/handle/123456789/159
AB  - Rad daje opis analize elastoplastičnih deformacija čeličnog cevnog apsorbera kinetičke energije sudara železničkih vozila metodom konačnih elemenata (FEM). Eksperimentalna istraživanja korišćena su kao osnova za modeliranje i simulaciju FEM modela. Razvijeni model konačnih elemenata uključuje nelinearne karakteristike materijala (plastičnost), nelinearni kontakt i velike deformacije konačnih elemenata. Svi aspekti korišćeni u FEM modelu apsorbera detaljno su opisani. Rezultati FEM analize za izabrani apsorber prikazani su i analizirani. Razvijeni model otvara nove mogućnosti za buduća istraživanja u sličnim problemima.
AB  - The paper describes the Finite Element Method (FEM) analysis of elastic plastic deformation of steel tube impact absorbers for railway vehicles. Experiment investigation is used as a basis for FEM modelling and simulation. The developed FEM model includes material nonlinearity (plasticity), nonlinear contact and large deformation of finite elements. All aspects used in the absorber FEM model are explained in detail. The finite element analysis results for a chosen absorber are presented and discussed. The developed model opens the possibilities for future investigations of similar problems.
PB  - Integritet i vek konstrukcija, Beograd
T2  - Structural Integrity and Life
T1  - Spregnuti nelinearni problemi u analizi konačnim elementima - studija slučaja
T1  - Coupled nonlinear problems in finite element analysis: A case study
EP  - 208
IS  - 3
SP  - 201
VL  - 12
UR  - https://hdl.handle.net/21.15107/rcub_rims_159
ER  - 

@article{
author = "Atanasovska, Ivana and Momčilović, Dejan and Burzić, Meri and Vuherer, Tomaž",
year = "2012",
abstract = "Rad daje opis analize elastoplastičnih deformacija čeličnog cevnog apsorbera kinetičke energije sudara železničkih vozila metodom konačnih elemenata (FEM). Eksperimentalna istraživanja korišćena su kao osnova za modeliranje i simulaciju FEM modela. Razvijeni model konačnih elemenata uključuje nelinearne karakteristike materijala (plastičnost), nelinearni kontakt i velike deformacije konačnih elemenata. Svi aspekti korišćeni u FEM modelu apsorbera detaljno su opisani. Rezultati FEM analize za izabrani apsorber prikazani su i analizirani. Razvijeni model otvara nove mogućnosti za buduća istraživanja u sličnim problemima., The paper describes the Finite Element Method (FEM) analysis of elastic plastic deformation of steel tube impact absorbers for railway vehicles. Experiment investigation is used as a basis for FEM modelling and simulation. The developed FEM model includes material nonlinearity (plasticity), nonlinear contact and large deformation of finite elements. All aspects used in the absorber FEM model are explained in detail. The finite element analysis results for a chosen absorber are presented and discussed. The developed model opens the possibilities for future investigations of similar problems.",
publisher = "Integritet i vek konstrukcija, Beograd",
journal = "Structural Integrity and Life",
title = "Spregnuti nelinearni problemi u analizi konačnim elementima - studija slučaja, Coupled nonlinear problems in finite element analysis: A case study",
pages = "208-201",
number = "3",
volume = "12",
url = "https://hdl.handle.net/21.15107/rcub_rims_159"
}

Atanasovska, I., Momčilović, D., Burzić, M.,& Vuherer, T.. (2012). Spregnuti nelinearni problemi u analizi konačnim elementima - studija slučaja. in Structural Integrity and Life
Integritet i vek konstrukcija, Beograd., 12(3), 201-208.
https://hdl.handle.net/21.15107/rcub_rims_159

Atanasovska I, Momčilović D, Burzić M, Vuherer T. Spregnuti nelinearni problemi u analizi konačnim elementima - studija slučaja. in Structural Integrity and Life. 2012;12(3):201-208.
https://hdl.handle.net/21.15107/rcub_rims_159 .

Atanasovska, Ivana, Momčilović, Dejan, Burzić, Meri, Vuherer, Tomaž, "Spregnuti nelinearni problemi u analizi konačnim elementima - studija slučaja" in Structural Integrity and Life, 12, no. 3 (2012):201-208,
https://hdl.handle.net/21.15107/rcub_rims_159 .

TY  - JOUR
AU  - Milović, Ljubica
AU  - Vuherer, Tomaž
AU  - Zrilić, Milorad
AU  - Momčilović, Dejan
AU  - Jaković, Dragan
PY  - 2011
UR  - http://rims.institutims.rs/handle/123456789/150
AB  - Welded joint is a critical region of a welded structure. The operational safety of welded pressure equipment mostly depends on the behaviour of loaded weldments. Safety of welded structure is dependent on the properties of welded joint as whole and of its constituents (parent metal, heat affected zone and weld metal). In this paper the behaviour of welded joint cracked constituents is considered. Structural integrity assessment procedure is applied to welded pressure vessel produced of high-strength low-alloyed steel, operating at -40 degrees C, comparing crack driving force and material crack resistance, using path-independent contour J-integral as fracture mechanics parameter. The comparison of crack driving force, expressed by J-integral and material resistant curve, J-R curve, provide the possibility to determine the extent of the stable crack as well as the critical crack size for its final fast propagation and also to assess the structural integrity of a cracked pressure vessel.
PB  - Journal Iron Steel Research  Editorial Board, Beijing
T2  - Journal of Iron and Steel Research International
T1  - Structural Integrity Assessment of Welded Pressure Vessel Produced of HSLA Steel
EP  - 892
SP  - 888
VL  - 18
UR  - https://hdl.handle.net/21.15107/rcub_technorep_1885
ER  - 

@article{
author = "Milović, Ljubica and Vuherer, Tomaž and Zrilić, Milorad and Momčilović, Dejan and Jaković, Dragan",
year = "2011",
abstract = "Welded joint is a critical region of a welded structure. The operational safety of welded pressure equipment mostly depends on the behaviour of loaded weldments. Safety of welded structure is dependent on the properties of welded joint as whole and of its constituents (parent metal, heat affected zone and weld metal). In this paper the behaviour of welded joint cracked constituents is considered. Structural integrity assessment procedure is applied to welded pressure vessel produced of high-strength low-alloyed steel, operating at -40 degrees C, comparing crack driving force and material crack resistance, using path-independent contour J-integral as fracture mechanics parameter. The comparison of crack driving force, expressed by J-integral and material resistant curve, J-R curve, provide the possibility to determine the extent of the stable crack as well as the critical crack size for its final fast propagation and also to assess the structural integrity of a cracked pressure vessel.",
publisher = "Journal Iron Steel Research  Editorial Board, Beijing",
journal = "Journal of Iron and Steel Research International",
title = "Structural Integrity Assessment of Welded Pressure Vessel Produced of HSLA Steel",
pages = "892-888",
volume = "18",
url = "https://hdl.handle.net/21.15107/rcub_technorep_1885"
}

Milović, L., Vuherer, T., Zrilić, M., Momčilović, D.,& Jaković, D.. (2011). Structural Integrity Assessment of Welded Pressure Vessel Produced of HSLA Steel. in Journal of Iron and Steel Research International
Journal Iron Steel Research  Editorial Board, Beijing., 18, 888-892.
https://hdl.handle.net/21.15107/rcub_technorep_1885

Milović L, Vuherer T, Zrilić M, Momčilović D, Jaković D. Structural Integrity Assessment of Welded Pressure Vessel Produced of HSLA Steel. in Journal of Iron and Steel Research International. 2011;18:888-892.
https://hdl.handle.net/21.15107/rcub_technorep_1885 .

Milović, Ljubica, Vuherer, Tomaž, Zrilić, Milorad, Momčilović, Dejan, Jaković, Dragan, "Structural Integrity Assessment of Welded Pressure Vessel Produced of HSLA Steel" in Journal of Iron and Steel Research International, 18 (2011):888-892,
https://hdl.handle.net/21.15107/rcub_technorep_1885 .