TY  - CONF
AU  - Međo, Bojan
AU  - Rakin, Marko
AU  - Gubeljak, Nenad
AU  - Musraty, W.
AU  - Matvienko, Y.
AU  - Milošević, Miloš
AU  - Sedmak, Aleksandar
PY  - 2017
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/2669
AB  - Integrity of cylindrical structures, such as pipes and small-scale pressure vessels, is typically assessed by testing fracture mechanics specimens, like compact tensile CT or single-edge notched bending, SENB. However, their fabrication is mainly not possible for thin-walled pressurised elements, commonly used in structures of process and energetic facilities, such as hydrogen and hydrogen carriers storage and delivery systems. Recently proposed nonstandard ring-shaped specimen is used to test the fracture resistance of pressurised cylinders with defects (cracks or notches) in the most critical direction - axial. Some of the advantages of the pipe-ring notch bend specimen, PRNB, are simple fabrication and same material history as actual exploited structure. A combined experimental-numerical procedure is applied for prediction of fracture behaviour of specimens (applicable to ductile metals, mainly steels and Al alloys), with the aim to further validate the new specimen. The results obtained so far lead to conclusion that PRNB specimen can be applied in integrity assessment of cylindrical structures.
PB  - International Conference on Fracture
C3  - ICF 2017 - 14th International Conference on Fracture
T1  - Numerical analysis of fracture of non-standard ring specimen for examination of axially flawed cylindrical structures
EP  - 220
SP  - 219
VL  - 2
UR  - https://hdl.handle.net/21.15107/rcub_technorep_3483
ER  - 

@conference{
author = "Međo, Bojan and Rakin, Marko and Gubeljak, Nenad and Musraty, W. and Matvienko, Y. and Milošević, Miloš and Sedmak, Aleksandar",
year = "2017",
abstract = "Integrity of cylindrical structures, such as pipes and small-scale pressure vessels, is typically assessed by testing fracture mechanics specimens, like compact tensile CT or single-edge notched bending, SENB. However, their fabrication is mainly not possible for thin-walled pressurised elements, commonly used in structures of process and energetic facilities, such as hydrogen and hydrogen carriers storage and delivery systems. Recently proposed nonstandard ring-shaped specimen is used to test the fracture resistance of pressurised cylinders with defects (cracks or notches) in the most critical direction - axial. Some of the advantages of the pipe-ring notch bend specimen, PRNB, are simple fabrication and same material history as actual exploited structure. A combined experimental-numerical procedure is applied for prediction of fracture behaviour of specimens (applicable to ductile metals, mainly steels and Al alloys), with the aim to further validate the new specimen. The results obtained so far lead to conclusion that PRNB specimen can be applied in integrity assessment of cylindrical structures.",
publisher = "International Conference on Fracture",
journal = "ICF 2017 - 14th International Conference on Fracture",
title = "Numerical analysis of fracture of non-standard ring specimen for examination of axially flawed cylindrical structures",
pages = "220-219",
volume = "2",
url = "https://hdl.handle.net/21.15107/rcub_technorep_3483"
}

Međo, B., Rakin, M., Gubeljak, N., Musraty, W., Matvienko, Y., Milošević, M.,& Sedmak, A.. (2017). Numerical analysis of fracture of non-standard ring specimen for examination of axially flawed cylindrical structures. in ICF 2017 - 14th International Conference on Fracture
International Conference on Fracture., 2, 219-220.
https://hdl.handle.net/21.15107/rcub_technorep_3483

Međo B, Rakin M, Gubeljak N, Musraty W, Matvienko Y, Milošević M, Sedmak A. Numerical analysis of fracture of non-standard ring specimen for examination of axially flawed cylindrical structures. in ICF 2017 - 14th International Conference on Fracture. 2017;2:219-220.
https://hdl.handle.net/21.15107/rcub_technorep_3483 .

Međo, Bojan, Rakin, Marko, Gubeljak, Nenad, Musraty, W., Matvienko, Y., Milošević, Miloš, Sedmak, Aleksandar, "Numerical analysis of fracture of non-standard ring specimen for examination of axially flawed cylindrical structures" in ICF 2017 - 14th International Conference on Fracture, 2 (2017):219-220,
https://hdl.handle.net/21.15107/rcub_technorep_3483 .

TY  - JOUR
AU  - Musraty, W.
AU  - Međo, Bojan
AU  - Gubeljak, Nenad
AU  - Likeb, A.
AU  - Cvijović-Alagić, Ivana
AU  - Sedmak, Aleksandar
AU  - Rakin, Marko
PY  - 2017
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/2539
AB  - Integrity of pipes is typically assessed by testing fracture mechanics specimens, such as compact tensile (CT) or single-edge notched bending (SENB). However, for some pipe dimensions it is not easy or possible to fabricate a specimen conforming to the requirements of standard procedures. A new type of specimen is proposed recently, which can be advantageous for relatively small pipe diameters and axial defects - the pipe ring notch bend specimen - PRNB. In this work, criteria for failure by ductile fracture of PRNB specimens are determined experimentally and by application of micromechanical analysis. The influence of size of the specimen, as well as size and shape of the stress concentrator, is analysed. The results of this study, along with previous authors' results, lead to the conclusion that the pipe ring specimens can be applied in integrity assessment of pipes with defects. Also, the benefits of their application include much simpler fabrication and the same material history as the pipe itself.
PB  - Pergamon-Elsevier Science Ltd, Oxford
T2  - Engineering Fracture Mechanics
T1  - Ductile fracture of pipe-ring notched bend specimens - Micromechanical analysis
EP  - 261
SP  - 247
VL  - 175
DO  - 10.1016/j.engfracmech.2017.01.022
ER  - 

@article{
author = "Musraty, W. and Međo, Bojan and Gubeljak, Nenad and Likeb, A. and Cvijović-Alagić, Ivana and Sedmak, Aleksandar and Rakin, Marko",
year = "2017",
abstract = "Integrity of pipes is typically assessed by testing fracture mechanics specimens, such as compact tensile (CT) or single-edge notched bending (SENB). However, for some pipe dimensions it is not easy or possible to fabricate a specimen conforming to the requirements of standard procedures. A new type of specimen is proposed recently, which can be advantageous for relatively small pipe diameters and axial defects - the pipe ring notch bend specimen - PRNB. In this work, criteria for failure by ductile fracture of PRNB specimens are determined experimentally and by application of micromechanical analysis. The influence of size of the specimen, as well as size and shape of the stress concentrator, is analysed. The results of this study, along with previous authors' results, lead to the conclusion that the pipe ring specimens can be applied in integrity assessment of pipes with defects. Also, the benefits of their application include much simpler fabrication and the same material history as the pipe itself.",
publisher = "Pergamon-Elsevier Science Ltd, Oxford",
journal = "Engineering Fracture Mechanics",
title = "Ductile fracture of pipe-ring notched bend specimens - Micromechanical analysis",
pages = "261-247",
volume = "175",
doi = "10.1016/j.engfracmech.2017.01.022"
}

Musraty, W., Međo, B., Gubeljak, N., Likeb, A., Cvijović-Alagić, I., Sedmak, A.,& Rakin, M.. (2017). Ductile fracture of pipe-ring notched bend specimens - Micromechanical analysis. in Engineering Fracture Mechanics
Pergamon-Elsevier Science Ltd, Oxford., 175, 247-261.
https://doi.org/10.1016/j.engfracmech.2017.01.022

Musraty W, Međo B, Gubeljak N, Likeb A, Cvijović-Alagić I, Sedmak A, Rakin M. Ductile fracture of pipe-ring notched bend specimens - Micromechanical analysis. in Engineering Fracture Mechanics. 2017;175:247-261.
doi:10.1016/j.engfracmech.2017.01.022 .

Musraty, W., Međo, Bojan, Gubeljak, Nenad, Likeb, A., Cvijović-Alagić, Ivana, Sedmak, Aleksandar, Rakin, Marko, "Ductile fracture of pipe-ring notched bend specimens - Micromechanical analysis" in Engineering Fracture Mechanics, 175 (2017):247-261,
https://doi.org/10.1016/j.engfracmech.2017.01.022 . .

TY  - CONF
AU  - Međo, Bojan
AU  - Arsić, Miodrag
AU  - Bošnjak, Srđan
AU  - Musraty, W.
AU  - Rakin, Marko
PY  - 2015
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/5251
AB  - In this work, additional loading device of the bridge crane for loads up to 500t, used at the „Đerdap” Hydro power plant, is analysed. The main aim is to determine the stress state, especially the stress distribution along the cross sections at the position of the opening for weight attachment. The main reason for conducting this analysis was the fact that non-destructive
examination (NDE) revealed some defects in the material. The stress values are determined using analytical and numerical methods. Both of them have shown that the safety factor value in the cross sections around the opening are acceptable, and that the material has sufficient remaining strength despite the defects observed using NDE.
PB  - University of Belgrade, Faculty of Mechanical Engineering
C3  - Proceedings of the 21st International Conference on Material Handling, Constructions and Logistics - MHCL '15
T1  - Stress analysis of the additional loading device of the bridge crane for weights up to 500 t
EP  - 224
SP  - 221
UR  - https://hdl.handle.net/21.15107/rcub_machinery_5251
ER  - 

@conference{
author = "Međo, Bojan and Arsić, Miodrag and Bošnjak, Srđan and Musraty, W. and Rakin, Marko",
year = "2015",
abstract = "In this work, additional loading device of the bridge crane for loads up to 500t, used at the „Đerdap” Hydro power plant, is analysed. The main aim is to determine the stress state, especially the stress distribution along the cross sections at the position of the opening for weight attachment. The main reason for conducting this analysis was the fact that non-destructive
examination (NDE) revealed some defects in the material. The stress values are determined using analytical and numerical methods. Both of them have shown that the safety factor value in the cross sections around the opening are acceptable, and that the material has sufficient remaining strength despite the defects observed using NDE.",
publisher = "University of Belgrade, Faculty of Mechanical Engineering",
journal = "Proceedings of the 21st International Conference on Material Handling, Constructions and Logistics - MHCL '15",
title = "Stress analysis of the additional loading device of the bridge crane for weights up to 500 t",
pages = "224-221",
url = "https://hdl.handle.net/21.15107/rcub_machinery_5251"
}

Međo, B., Arsić, M., Bošnjak, S., Musraty, W.,& Rakin, M.. (2015). Stress analysis of the additional loading device of the bridge crane for weights up to 500 t. in Proceedings of the 21st International Conference on Material Handling, Constructions and Logistics - MHCL '15
University of Belgrade, Faculty of Mechanical Engineering., 221-224.
https://hdl.handle.net/21.15107/rcub_machinery_5251

Međo B, Arsić M, Bošnjak S, Musraty W, Rakin M. Stress analysis of the additional loading device of the bridge crane for weights up to 500 t. in Proceedings of the 21st International Conference on Material Handling, Constructions and Logistics - MHCL '15. 2015;:221-224.
https://hdl.handle.net/21.15107/rcub_machinery_5251 .

Međo, Bojan, Arsić, Miodrag, Bošnjak, Srđan, Musraty, W., Rakin, Marko, "Stress analysis of the additional loading device of the bridge crane for weights up to 500 t" in Proceedings of the 21st International Conference on Material Handling, Constructions and Logistics - MHCL '15 (2015):221-224,
https://hdl.handle.net/21.15107/rcub_machinery_5251 .