TY  - CONF
AU  - Kastratović, Gordana
AU  - Grbović, Aleksandar
AU  - Sedmak, Aleksandar
AU  - Bozić, Z.
AU  - Sedmak, Simon
PY  - 2021
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/3598
AB  - In this paper determination of mechanical properties of composite material using experimental and numerical approach is presented. The mechanical properties of a laminate obtained in the experiment are used for verification of numerically obtained values, as well as estimation of the load-carrying capacities of composite engine cover of light aircraft. Composite specimens, consisting of epoxy matrix and glass fibers with orientation angles 0 degrees, 45 degrees, and 90 degrees, have been made according to standards, and the mechanical properties were investigated in tensile and three-point bending tests. The tensile strength, bending strength, elasticity modulus, strain, and force at laminate failure have been evaluated and then compared to values obtained in numerical simulations with the aim of verifying the FE model used for failure prediction of structural laminates. Good agreement of experimental and numerical values provides a solid foundation for further improvements of the numerical model.
PB  - Elsevier Science Bv, Amsterdam
C3  - Procedia Structural Integrity - 4th Int Conf Struct Integrity & Durability (ICSID 2020)
T1  - Composite material selection for aircraft structures based on experimental and numerical evaluation of mechanical properties
EP  - 133
SP  - 127
VL  - 31
DO  - 10.1016/j.prostr.2021.03.021
ER  - 

@conference{
author = "Kastratović, Gordana and Grbović, Aleksandar and Sedmak, Aleksandar and Bozić, Z. and Sedmak, Simon",
year = "2021",
abstract = "In this paper determination of mechanical properties of composite material using experimental and numerical approach is presented. The mechanical properties of a laminate obtained in the experiment are used for verification of numerically obtained values, as well as estimation of the load-carrying capacities of composite engine cover of light aircraft. Composite specimens, consisting of epoxy matrix and glass fibers with orientation angles 0 degrees, 45 degrees, and 90 degrees, have been made according to standards, and the mechanical properties were investigated in tensile and three-point bending tests. The tensile strength, bending strength, elasticity modulus, strain, and force at laminate failure have been evaluated and then compared to values obtained in numerical simulations with the aim of verifying the FE model used for failure prediction of structural laminates. Good agreement of experimental and numerical values provides a solid foundation for further improvements of the numerical model.",
publisher = "Elsevier Science Bv, Amsterdam",
journal = "Procedia Structural Integrity - 4th Int Conf Struct Integrity & Durability (ICSID 2020)",
title = "Composite material selection for aircraft structures based on experimental and numerical evaluation of mechanical properties",
pages = "133-127",
volume = "31",
doi = "10.1016/j.prostr.2021.03.021"
}

Kastratović, G., Grbović, A., Sedmak, A., Bozić, Z.,& Sedmak, S.. (2021). Composite material selection for aircraft structures based on experimental and numerical evaluation of mechanical properties. in Procedia Structural Integrity - 4th Int Conf Struct Integrity & Durability (ICSID 2020)
Elsevier Science Bv, Amsterdam., 31, 127-133.
https://doi.org/10.1016/j.prostr.2021.03.021

Kastratović G, Grbović A, Sedmak A, Bozić Z, Sedmak S. Composite material selection for aircraft structures based on experimental and numerical evaluation of mechanical properties. in Procedia Structural Integrity - 4th Int Conf Struct Integrity & Durability (ICSID 2020). 2021;31:127-133.
doi:10.1016/j.prostr.2021.03.021 .

Kastratović, Gordana, Grbović, Aleksandar, Sedmak, Aleksandar, Bozić, Z., Sedmak, Simon, "Composite material selection for aircraft structures based on experimental and numerical evaluation of mechanical properties" in Procedia Structural Integrity - 4th Int Conf Struct Integrity & Durability (ICSID 2020), 31 (2021):127-133,
https://doi.org/10.1016/j.prostr.2021.03.021 . .

TY  - CONF
AU  - Aranđelović, Mihajlo
AU  - Sedmak, Simon
AU  - Milović, Ljubica
AU  - Maksimović, A.
AU  - Bozić, Z.
PY  - 2020
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/3268
AB  - Crack propagation in 3PB specimen has been investigated experimentally by using Digital Image Correlation (DIC) technique. For this purpose, specimens were taken from butt welded plates, made of P460NL1 micro-alloyed steel. Fatigue pre-crack of 3PB specimens was introduced in the weld metal. Specimens were then statically loaded and analyzed using digital image correlation software ARAMIS to assess strain fields and crack propagation paths. Bifurcation of cracks was noticed as the main characteristics of crack prop-agation in the analyzed case.
PB  - Elsevier, Amsterdam
C3  - Procedia Structural Integrity - 1st Virtual European Conference on Fracture - Vecf1
T1  - Crack propagation in 3PB specimen made from welded joint
EP  - 445
SP  - 440
VL  - 28
DO  - 10.1016/j.prostr.2020.10.051
ER  - 

@conference{
author = "Aranđelović, Mihajlo and Sedmak, Simon and Milović, Ljubica and Maksimović, A. and Bozić, Z.",
year = "2020",
abstract = "Crack propagation in 3PB specimen has been investigated experimentally by using Digital Image Correlation (DIC) technique. For this purpose, specimens were taken from butt welded plates, made of P460NL1 micro-alloyed steel. Fatigue pre-crack of 3PB specimens was introduced in the weld metal. Specimens were then statically loaded and analyzed using digital image correlation software ARAMIS to assess strain fields and crack propagation paths. Bifurcation of cracks was noticed as the main characteristics of crack prop-agation in the analyzed case.",
publisher = "Elsevier, Amsterdam",
journal = "Procedia Structural Integrity - 1st Virtual European Conference on Fracture - Vecf1",
title = "Crack propagation in 3PB specimen made from welded joint",
pages = "445-440",
volume = "28",
doi = "10.1016/j.prostr.2020.10.051"
}

Aranđelović, M., Sedmak, S., Milović, L., Maksimović, A.,& Bozić, Z.. (2020). Crack propagation in 3PB specimen made from welded joint. in Procedia Structural Integrity - 1st Virtual European Conference on Fracture - Vecf1
Elsevier, Amsterdam., 28, 440-445.
https://doi.org/10.1016/j.prostr.2020.10.051

Aranđelović M, Sedmak S, Milović L, Maksimović A, Bozić Z. Crack propagation in 3PB specimen made from welded joint. in Procedia Structural Integrity - 1st Virtual European Conference on Fracture - Vecf1. 2020;28:440-445.
doi:10.1016/j.prostr.2020.10.051 .

Aranđelović, Mihajlo, Sedmak, Simon, Milović, Ljubica, Maksimović, A., Bozić, Z., "Crack propagation in 3PB specimen made from welded joint" in Procedia Structural Integrity - 1st Virtual European Conference on Fracture - Vecf1, 28 (2020):440-445,
https://doi.org/10.1016/j.prostr.2020.10.051 . .

TY  - JOUR
AU  - Solob, A.
AU  - Grbović, Aleksandar
AU  - Bozić, Z.
AU  - Sedmak, Simon
PY  - 2020
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/3393
AB  - The research presented in this paper is based on the use of extended finite element method (XFEM) for stress intensity factors (SIFs) determination in the case of fatigue crack presented in the wing-fuselage attachment lug used in light aerobatic aircraft. The presence of the through crack at the attachment lug hole is not allowed since its growth due to high dynamic loads is usually fast and can lead to catastrophic consequences. To demonstrate how dangerous the appearance of the crack could be, as well as to estimate the residual strength and fatigue life of cracked component, finite element model of attachment lug was made, and analyses were carried out using the maximum load that can occur during the flight (load factor n = 6). The predicted number of cycles to complete failure was - as expected - low, confirming the fact that attachment lugs must be designed using safe-life approach.
PB  - Pergamon-Elsevier Science Ltd, Oxford
T2  - Engineering Failure Analysis
T1  - XFEM based analysis of fatigue crack growth in damaged wing-uselage attachment lug
VL  - 112
DO  - 10.1016/j.engfailanal.2020.104516
ER  - 

@article{
author = "Solob, A. and Grbović, Aleksandar and Bozić, Z. and Sedmak, Simon",
year = "2020",
abstract = "The research presented in this paper is based on the use of extended finite element method (XFEM) for stress intensity factors (SIFs) determination in the case of fatigue crack presented in the wing-fuselage attachment lug used in light aerobatic aircraft. The presence of the through crack at the attachment lug hole is not allowed since its growth due to high dynamic loads is usually fast and can lead to catastrophic consequences. To demonstrate how dangerous the appearance of the crack could be, as well as to estimate the residual strength and fatigue life of cracked component, finite element model of attachment lug was made, and analyses were carried out using the maximum load that can occur during the flight (load factor n = 6). The predicted number of cycles to complete failure was - as expected - low, confirming the fact that attachment lugs must be designed using safe-life approach.",
publisher = "Pergamon-Elsevier Science Ltd, Oxford",
journal = "Engineering Failure Analysis",
title = "XFEM based analysis of fatigue crack growth in damaged wing-uselage attachment lug",
volume = "112",
doi = "10.1016/j.engfailanal.2020.104516"
}

Solob, A., Grbović, A., Bozić, Z.,& Sedmak, S.. (2020). XFEM based analysis of fatigue crack growth in damaged wing-uselage attachment lug. in Engineering Failure Analysis
Pergamon-Elsevier Science Ltd, Oxford., 112.
https://doi.org/10.1016/j.engfailanal.2020.104516

Solob A, Grbović A, Bozić Z, Sedmak S. XFEM based analysis of fatigue crack growth in damaged wing-uselage attachment lug. in Engineering Failure Analysis. 2020;112.
doi:10.1016/j.engfailanal.2020.104516 .

Solob, A., Grbović, Aleksandar, Bozić, Z., Sedmak, Simon, "XFEM based analysis of fatigue crack growth in damaged wing-uselage attachment lug" in Engineering Failure Analysis, 112 (2020),
https://doi.org/10.1016/j.engfailanal.2020.104516 . .

TY  - JOUR
AU  - Milovanović, Nikola
AU  - Sedmak, Aleksandar
AU  - Arsić, M.
AU  - Sedmak, Simon
AU  - Bozić, Z.
PY  - 2020
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/3386
AB  - Failures of rotating equipment often cause severe consequences, so it is necessary to study their integrity and life as detailed as possible, especially when crack is detected. In the case studied here, hydro power plant turbine shaft is analysed by using fracture mechanics parameters both for static and dynamic loading in order to assess its structural integrity and life. In both cases classical engineering approach and Finite Element Method have been applied to evaluate stress state and number of cycles from a given initial crack length to its critical value. Results of analytical and numerical modelling are compared to verify both approaches.
PB  - Pergamon-Elsevier Science Ltd, Oxford
T2  - Engineering Failure Analysis
T1  - Structural integrity and life assessment of rotating equipment
VL  - 113
DO  - 10.1016/j.engfailanal.2020.104561
ER  - 

@article{
author = "Milovanović, Nikola and Sedmak, Aleksandar and Arsić, M. and Sedmak, Simon and Bozić, Z.",
year = "2020",
abstract = "Failures of rotating equipment often cause severe consequences, so it is necessary to study their integrity and life as detailed as possible, especially when crack is detected. In the case studied here, hydro power plant turbine shaft is analysed by using fracture mechanics parameters both for static and dynamic loading in order to assess its structural integrity and life. In both cases classical engineering approach and Finite Element Method have been applied to evaluate stress state and number of cycles from a given initial crack length to its critical value. Results of analytical and numerical modelling are compared to verify both approaches.",
publisher = "Pergamon-Elsevier Science Ltd, Oxford",
journal = "Engineering Failure Analysis",
title = "Structural integrity and life assessment of rotating equipment",
volume = "113",
doi = "10.1016/j.engfailanal.2020.104561"
}

Milovanović, N., Sedmak, A., Arsić, M., Sedmak, S.,& Bozić, Z.. (2020). Structural integrity and life assessment of rotating equipment. in Engineering Failure Analysis
Pergamon-Elsevier Science Ltd, Oxford., 113.
https://doi.org/10.1016/j.engfailanal.2020.104561

Milovanović N, Sedmak A, Arsić M, Sedmak S, Bozić Z. Structural integrity and life assessment of rotating equipment. in Engineering Failure Analysis. 2020;113.
doi:10.1016/j.engfailanal.2020.104561 .

Milovanović, Nikola, Sedmak, Aleksandar, Arsić, M., Sedmak, Simon, Bozić, Z., "Structural integrity and life assessment of rotating equipment" in Engineering Failure Analysis, 113 (2020),
https://doi.org/10.1016/j.engfailanal.2020.104561 . .

TY  - CONF
AU  - Grbović, Aleksandar
AU  - Bozić, Z.
AU  - Kirin, Snežana
AU  - Kastratović, Gordana
AU  - Sedmak, Aleksandar
AU  - Vidanović, Nenad
PY  - 2020
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/3427
AB  - The exhaust nozzle represents a part of a jet engine which is crucial to its overall performance, since it accelerates the flow of hot gases out of the engine and creates a thrust. During its long service, it is exposed to elevated temperatures and high compressive and hoop stresses, which makes the cracks' occurrence in the exhaust nozzle's inner sleeve almost unavoidable. The aim of this paper is to analyze and numerically estimate the fatigue life of inner sleeve in the presence of widespread damage. When damage is detected, two repair methods are employed: welding of single cracks (manual TIG welding) and the use of welded patches. Using numerical simulations based on extended finite element method (XFEM) and finite element method (FEM), fatigue life of repaired inner sleeves were estimated. Based on the comparison of the results obtained in simulations, it was shown that the repair method with welded patches provides longer fatigue life of widespread damaged nozzle than the other with welding of cracks.
PB  - Elsevier Science Bv, Amsterdam
C3  - Procedia Structural Integrity - 1st Medit Conf Fracture & Structural Integrity (Medfract1)
T1  - Fatigue life assessment of the structure with widespread damage exposed to high temperature
EP  - 408
SP  - 402
VL  - 26
DO  - 10.1016/j.prostr.2020.06.051
ER  - 

@conference{
author = "Grbović, Aleksandar and Bozić, Z. and Kirin, Snežana and Kastratović, Gordana and Sedmak, Aleksandar and Vidanović, Nenad",
year = "2020",
abstract = "The exhaust nozzle represents a part of a jet engine which is crucial to its overall performance, since it accelerates the flow of hot gases out of the engine and creates a thrust. During its long service, it is exposed to elevated temperatures and high compressive and hoop stresses, which makes the cracks' occurrence in the exhaust nozzle's inner sleeve almost unavoidable. The aim of this paper is to analyze and numerically estimate the fatigue life of inner sleeve in the presence of widespread damage. When damage is detected, two repair methods are employed: welding of single cracks (manual TIG welding) and the use of welded patches. Using numerical simulations based on extended finite element method (XFEM) and finite element method (FEM), fatigue life of repaired inner sleeves were estimated. Based on the comparison of the results obtained in simulations, it was shown that the repair method with welded patches provides longer fatigue life of widespread damaged nozzle than the other with welding of cracks.",
publisher = "Elsevier Science Bv, Amsterdam",
journal = "Procedia Structural Integrity - 1st Medit Conf Fracture & Structural Integrity (Medfract1)",
title = "Fatigue life assessment of the structure with widespread damage exposed to high temperature",
pages = "408-402",
volume = "26",
doi = "10.1016/j.prostr.2020.06.051"
}

Grbović, A., Bozić, Z., Kirin, S., Kastratović, G., Sedmak, A.,& Vidanović, N.. (2020). Fatigue life assessment of the structure with widespread damage exposed to high temperature. in Procedia Structural Integrity - 1st Medit Conf Fracture & Structural Integrity (Medfract1)
Elsevier Science Bv, Amsterdam., 26, 402-408.
https://doi.org/10.1016/j.prostr.2020.06.051

Grbović A, Bozić Z, Kirin S, Kastratović G, Sedmak A, Vidanović N. Fatigue life assessment of the structure with widespread damage exposed to high temperature. in Procedia Structural Integrity - 1st Medit Conf Fracture & Structural Integrity (Medfract1). 2020;26:402-408.
doi:10.1016/j.prostr.2020.06.051 .

Grbović, Aleksandar, Bozić, Z., Kirin, Snežana, Kastratović, Gordana, Sedmak, Aleksandar, Vidanović, Nenad, "Fatigue life assessment of the structure with widespread damage exposed to high temperature" in Procedia Structural Integrity - 1st Medit Conf Fracture & Structural Integrity (Medfract1), 26 (2020):402-408,
https://doi.org/10.1016/j.prostr.2020.06.051 . .