TY  - JOUR
AU  - Dimić, Ivana
AU  - Arsić, Miodrag
AU  - Međo, Bojan
AU  - Stefanović, Ana
AU  - Grabulov, Vencislav
AU  - Rakin, Marko
PY  - 2013
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/2515
AB  - Since local defects reduce the load-carrying capacity and deformation ability of a piping system, an analysis is undertaken to quantify the influence of weld defects on integrity of the pipe elbows subjected to internal pressure. Incompletely filled groove is examined, because this type of defect was previously detected by ultrasonic measurement on the inner surface of the pipeline from a hydro-power plant. Three-dimensional finite element analysis is conducted using Abaqus software package. The influence of weld defect geometry (its depth, length and location) on the elbow integrity is determined. Additionally, decrease of load carrying capacity is determined for the case when a crack has initiated at the bottom of the defect. The influence of finite element type (hexahedral or tetrahedral) is examined.
PB  - University of Osijek, Tech Fac, Slavonski Brod
T2  - Tehnicki vjesnik-Technical Gazette
T1  - Effect of welded joint imperfection on the integrity of pipe elbows subjected to internal pressure
EP  - 290
IS  - 2
SP  - 285
VL  - 20
UR  - https://hdl.handle.net/21.15107/rcub_technorep_2515
ER  - 

@article{
author = "Dimić, Ivana and Arsić, Miodrag and Međo, Bojan and Stefanović, Ana and Grabulov, Vencislav and Rakin, Marko",
year = "2013",
abstract = "Since local defects reduce the load-carrying capacity and deformation ability of a piping system, an analysis is undertaken to quantify the influence of weld defects on integrity of the pipe elbows subjected to internal pressure. Incompletely filled groove is examined, because this type of defect was previously detected by ultrasonic measurement on the inner surface of the pipeline from a hydro-power plant. Three-dimensional finite element analysis is conducted using Abaqus software package. The influence of weld defect geometry (its depth, length and location) on the elbow integrity is determined. Additionally, decrease of load carrying capacity is determined for the case when a crack has initiated at the bottom of the defect. The influence of finite element type (hexahedral or tetrahedral) is examined.",
publisher = "University of Osijek, Tech Fac, Slavonski Brod",
journal = "Tehnicki vjesnik-Technical Gazette",
title = "Effect of welded joint imperfection on the integrity of pipe elbows subjected to internal pressure",
pages = "290-285",
number = "2",
volume = "20",
url = "https://hdl.handle.net/21.15107/rcub_technorep_2515"
}

Dimić, I., Arsić, M., Međo, B., Stefanović, A., Grabulov, V.,& Rakin, M.. (2013). Effect of welded joint imperfection on the integrity of pipe elbows subjected to internal pressure. in Tehnicki vjesnik-Technical Gazette
University of Osijek, Tech Fac, Slavonski Brod., 20(2), 285-290.
https://hdl.handle.net/21.15107/rcub_technorep_2515

Dimić I, Arsić M, Međo B, Stefanović A, Grabulov V, Rakin M. Effect of welded joint imperfection on the integrity of pipe elbows subjected to internal pressure. in Tehnicki vjesnik-Technical Gazette. 2013;20(2):285-290.
https://hdl.handle.net/21.15107/rcub_technorep_2515 .

Dimić, Ivana, Arsić, Miodrag, Međo, Bojan, Stefanović, Ana, Grabulov, Vencislav, Rakin, Marko, "Effect of welded joint imperfection on the integrity of pipe elbows subjected to internal pressure" in Tehnicki vjesnik-Technical Gazette, 20, no. 2 (2013):285-290,
https://hdl.handle.net/21.15107/rcub_technorep_2515 .

TY  - JOUR
AU  - Stamenović, Marina
AU  - Putić, Slaviša
AU  - Međo, Bojan
AU  - Rakin, Marko
AU  - Zrilić, Milorad
PY  - 2012
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/2141
AB  - The objective of this study was the determination of the influence of alkaline and acidic solutions on the impact properties of glass-polyester composite pipes. First, the impact test was performed on virgin samples (without the influence of any liquid) to obtain knowledge about the original material properties. Subsequently, the specimens were soaked in water and in alkaline and acidic solutions: sodium hydroxide, ammonium hydroxide, phosphoric acid, and nitric acid. The specimens were left in each liquid for 3, 10, 30, and 60 days at room temperature. The impact toughness and the crack initiation and propagation energies were recorded for all samples. A comparison of the results was made based on the pH values of the aggressive media, as well as based on the original impact properties and number of days of treatment. This way, the service life of pipes for transport of theexamined solutions could be predicted. POLYM. COMPOS., 2012.
PB  - Wiley-Blackwell, Hoboken
T2  - Polymer Composites
T1  - Effect of solution pH on crack initiation and propagation in glass-polyester pipes subjected to impact
EP  - 1328
IS  - 8
SP  - 1321
VL  - 33
DO  - 10.1002/pc.22258
ER  - 

@article{
author = "Stamenović, Marina and Putić, Slaviša and Međo, Bojan and Rakin, Marko and Zrilić, Milorad",
year = "2012",
abstract = "The objective of this study was the determination of the influence of alkaline and acidic solutions on the impact properties of glass-polyester composite pipes. First, the impact test was performed on virgin samples (without the influence of any liquid) to obtain knowledge about the original material properties. Subsequently, the specimens were soaked in water and in alkaline and acidic solutions: sodium hydroxide, ammonium hydroxide, phosphoric acid, and nitric acid. The specimens were left in each liquid for 3, 10, 30, and 60 days at room temperature. The impact toughness and the crack initiation and propagation energies were recorded for all samples. A comparison of the results was made based on the pH values of the aggressive media, as well as based on the original impact properties and number of days of treatment. This way, the service life of pipes for transport of theexamined solutions could be predicted. POLYM. COMPOS., 2012.",
publisher = "Wiley-Blackwell, Hoboken",
journal = "Polymer Composites",
title = "Effect of solution pH on crack initiation and propagation in glass-polyester pipes subjected to impact",
pages = "1328-1321",
number = "8",
volume = "33",
doi = "10.1002/pc.22258"
}

Stamenović, M., Putić, S., Međo, B., Rakin, M.,& Zrilić, M.. (2012). Effect of solution pH on crack initiation and propagation in glass-polyester pipes subjected to impact. in Polymer Composites
Wiley-Blackwell, Hoboken., 33(8), 1321-1328.
https://doi.org/10.1002/pc.22258

Stamenović M, Putić S, Međo B, Rakin M, Zrilić M. Effect of solution pH on crack initiation and propagation in glass-polyester pipes subjected to impact. in Polymer Composites. 2012;33(8):1321-1328.
doi:10.1002/pc.22258 .

Stamenović, Marina, Putić, Slaviša, Međo, Bojan, Rakin, Marko, Zrilić, Milorad, "Effect of solution pH on crack initiation and propagation in glass-polyester pipes subjected to impact" in Polymer Composites, 33, no. 8 (2012):1321-1328,
https://doi.org/10.1002/pc.22258 . .

TY  - JOUR
AU  - Međo, Bojan
AU  - Rakin, Marko
AU  - Arsić, Miodrag
AU  - Šarkočević, Živče
AU  - Zrilić, Milorad
AU  - Putić, Slaviša
PY  - 2012
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/2191
AB  - The subject of this study was the application of local approach to ductile fracture in order to estimate the integrity of damaged seam casing pipes for oil and gas drilling rigs. The experimental testing included tensile testing of specimens and a pressure test of a pipe with different levels of damage simulated by machined notches. In exploitation, such structures (i.e., pipes with local thin areas) can fail by the ductile fracture mechanism or by plastic collapse in the ligament. However, the majority of the procedures for determining their integrity are based on limit loads, i.e., plastic collapse criteria. In this work, a pipe subjected to internal pressure was modelled using the finite element method and local approach to fracture (the Complete Gurson Model - CGM), with the aim of determining damage development in the material (i.e., at the bottom of a machined defect) and of establishing the criteria for the maximum pressure that a damaged pipe can withstand. The results obtained using the micromechanical model are discussed and compared with several often used limit load expressions from the literature and a stress-based finite element criterion. It is shown that local approach can give appropriate results and represent failure criterion for pipes with local thin areas. [doi:10.2320/matertrans.M2011210]
PB  - Japan Inst Metals, Sendai
T2  - Materials Transactions
T1  - Determination of the Load Carrying Capacity of Damaged Pipes Using Local Approach to Fracture
EP  - 190
IS  - 1
SP  - 185
VL  - 53
DO  - 10.2320/matertrans.M2011210
ER  - 

@article{
author = "Međo, Bojan and Rakin, Marko and Arsić, Miodrag and Šarkočević, Živče and Zrilić, Milorad and Putić, Slaviša",
year = "2012",
abstract = "The subject of this study was the application of local approach to ductile fracture in order to estimate the integrity of damaged seam casing pipes for oil and gas drilling rigs. The experimental testing included tensile testing of specimens and a pressure test of a pipe with different levels of damage simulated by machined notches. In exploitation, such structures (i.e., pipes with local thin areas) can fail by the ductile fracture mechanism or by plastic collapse in the ligament. However, the majority of the procedures for determining their integrity are based on limit loads, i.e., plastic collapse criteria. In this work, a pipe subjected to internal pressure was modelled using the finite element method and local approach to fracture (the Complete Gurson Model - CGM), with the aim of determining damage development in the material (i.e., at the bottom of a machined defect) and of establishing the criteria for the maximum pressure that a damaged pipe can withstand. The results obtained using the micromechanical model are discussed and compared with several often used limit load expressions from the literature and a stress-based finite element criterion. It is shown that local approach can give appropriate results and represent failure criterion for pipes with local thin areas. [doi:10.2320/matertrans.M2011210]",
publisher = "Japan Inst Metals, Sendai",
journal = "Materials Transactions",
title = "Determination of the Load Carrying Capacity of Damaged Pipes Using Local Approach to Fracture",
pages = "190-185",
number = "1",
volume = "53",
doi = "10.2320/matertrans.M2011210"
}

Međo, B., Rakin, M., Arsić, M., Šarkočević, Ž., Zrilić, M.,& Putić, S.. (2012). Determination of the Load Carrying Capacity of Damaged Pipes Using Local Approach to Fracture. in Materials Transactions
Japan Inst Metals, Sendai., 53(1), 185-190.
https://doi.org/10.2320/matertrans.M2011210

Međo B, Rakin M, Arsić M, Šarkočević Ž, Zrilić M, Putić S. Determination of the Load Carrying Capacity of Damaged Pipes Using Local Approach to Fracture. in Materials Transactions. 2012;53(1):185-190.
doi:10.2320/matertrans.M2011210 .

Međo, Bojan, Rakin, Marko, Arsić, Miodrag, Šarkočević, Živče, Zrilić, Milorad, Putić, Slaviša, "Determination of the Load Carrying Capacity of Damaged Pipes Using Local Approach to Fracture" in Materials Transactions, 53, no. 1 (2012):185-190,
https://doi.org/10.2320/matertrans.M2011210 . .