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Igor Orynyak
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Journal Articles

Targeted Model Error Determination for Limit Load Formulas for Axial Surface Defect in a Pressurized Pipe

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Igor Orynyak, Vladyslav Marchenko, Roman Mazuryk, Andrii Oryniak
Journal: Journal of Pressure Vessel Technology
Publisher: ASME
Article Type: Research-Article
J. Pressure Vessel Technol. February 2023, 145(1): 011503.
Paper No: PVT-22-1053
https://doi.org/10.1115/1.4055008
Published Online: August 18, 2022
View Articletitled, Targeted Model Error Determination for Limit Load Formulas for Axial Surface Defect in a Pressurized Pipe
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Topics: Errors, Pipes, Weight (Mass)
Journal Articles

Analytical Limit Load Procedure for the Axial Complex Shaped Defect in a Pressurized Pipe

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Igor Orynyak, Julia Bai, Roman Mazuryk
Journal: Journal of Pressure Vessel Technology
Publisher: ASME
Article Type: Research-Article
J. Pressure Vessel Technol. August 2022, 144(4): 041305.
Paper No: PVT-21-1119
https://doi.org/10.1115/1.4052851
Published Online: December 6, 2021
View Articletitled, Analytical Limit Load Procedure for the Axial Complex Shaped Defect in a Pressurized Pipe
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Topics: Algorithms, Pipes, Pressure, Stress
Proceedings Papers

Analytical Limit Load Formula and Procedure for Strength Calculation of Axial Complex Shaped Defect in Pipe

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Igor Orynyak, Julia Bai, Roman Mazuryk
Proc. ASME. PVP2021, Volume 4: Materials and Fabrication, V004T06A059, July 13–15, 2021
Publisher: American Society of Mechanical Engineers
Paper No: PVP2021-61640
https://doi.org/10.1115/PVP2021-61640
View Paper titled, Analytical Limit Load Formula and Procedure for Strength Calculation of Axial Complex Shaped Defect in Pipe
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Topics: Algorithms, Optimization, Pipes, Pressure, Stress
Journal Articles

Application of Short and Long (Enhanced Vlasov's) Solutions for Cylindrical Shell on Example of Concentrated Radial Force

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Andrii Oryniak, Igor Orynyak
Journal: Journal of Pressure Vessel Technology
Publisher: ASME
Article Type: Technical Briefs
J. Pressure Vessel Technol. February 2021, 143(1): 014501.
Paper No: PVT-19-1069
https://doi.org/10.1115/1.4047828
Published Online: August 17, 2020
View Articletitled, Application of Short and Long (Enhanced Vlasov's) Solutions for Cylindrical Shell on Example of Concentrated Radial Force
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Topics: Displacement, Finite element methods, Pipes, Differential equations, Shells
Proceedings Papers

Efficient Solution for Cylindrical Shell Based on Short and Long (Enhanced Vlasov’s) Solutions on Example of Concentrated Radial Force

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Igor Orynyak, Andrii Oryniak
Proc. ASME. PVP2018, Volume 3A: Design and Analysis, V03AT03A033, July 15–20, 2018
Publisher: American Society of Mechanical Engineers
Paper No: PVP2018-85032
https://doi.org/10.1115/PVP2018-85032
View Paper titled, Efficient Solution for Cylindrical Shell Based on Short and Long (Enhanced Vlasov’s) Solutions on Example of Concentrated Radial Force
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Topics: Pipes, Displacement, Shear (Mechanics), Boundary-value problems, Computer software, Computers, Differential equations, Equilibrium (Physics), Finite element analysis, Fourier series
Proceedings Papers

Approximate Formulas for Cylindrical Shell Free Vibration Based on Vlasov’s and Enhanced Vlasov’s Semi-Momentless Theory

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Igor Orynyak, Yaroslav Dubyk
Proc. ASME. PVP2018, Volume 8: Seismic Engineering, V008T08A050, July 15–20, 2018
Publisher: American Society of Mechanical Engineers
Paper No: PVP2018-84932
https://doi.org/10.1115/PVP2018-84932
View Paper titled, Approximate Formulas for Cylindrical Shell Free Vibration Based on Vlasov’s and Enhanced Vlasov’s Semi-Momentless Theory
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Topics: Boundary-value problems, Circular cylindrical shells, Deflection, Equations of motion, Finite element methods, Finite element model, Fourier series, Free vibrations, Mode shapes, Pipes
Proceedings Papers

FEM Calculations of SIF and COA for Through Axial Cracks in Pipes in Geometrically Nonlinear Formulation

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Andrii Oryniak, Igor Orynyak
Proc. ASME. PVP2018, Volume 3B: Design and Analysis, V03BT03A030, July 15–20, 2018
Publisher: American Society of Mechanical Engineers
Paper No: PVP2018-85033
https://doi.org/10.1115/PVP2018-85033
View Paper titled, FEM Calculations of SIF and COA for Through Axial Cracks in Pipes in Geometrically Nonlinear Formulation
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Topics: Finite element methods, Finite element model, Fracture (Materials), Pipes, Stress, Pressure, Computer simulation, Finite element analysis, Hoop stress, Leak-before-break
Proceedings Papers

Williams-Wittrick Approach Application for an Effective Search for Natural Vibration Frequencies of Pipeline Systems With Fluid-Structure Interaction

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Igor Orynyak, Anatolii Batura, Yaroslav Dubyk
Proc. ASME. PVP2018, Volume 4: Fluid-Structure Interaction, V004T04A026, July 15–20, 2018
Publisher: American Society of Mechanical Engineers
Paper No: PVP2018-84933
https://doi.org/10.1115/PVP2018-84933
View Paper titled, Williams-Wittrick Approach Application for an Effective Search for Natural Vibration Frequencies of Pipeline Systems With Fluid-Structure Interaction
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Topics: Fluid structure interaction, Oscillating frequencies, Pipeline systems, Fluids, Junctions, Boundary-value problems, Free vibrations, Pipelines, Pipes, Vibration
Proceedings Papers

Dynamic Assessment of the Core Barrel During Loss of Coolant Accident

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Yaroslav Dubyk, Vladislav Filonov, Oleksii Ishchenko, Igor Orynyak, Yuliia Filonova
Proc. ASME. PVP2018, Volume 4: Fluid-Structure Interaction, V004T04A035, July 15–20, 2018
Publisher: American Society of Mechanical Engineers
Paper No: PVP2018-84762
https://doi.org/10.1115/PVP2018-84762
View Paper titled, Dynamic Assessment of the Core Barrel During Loss of Coolant Accident
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Topics: Accidents, Coolants, Pressurized water reactors, Shells, Stress, Transients (Dynamics), Acoustics, Finite element analysis, Fracture mechanics, In-service inspection
Proceedings Papers

Swelling of VVER-1000 Core Baffle: Numerical Modeling and Direct Measurement of its Geometrical Dimensions

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Andrii Oryniak, Igor Orynyak
Proc. ASME. PVP2017, Volume 7: Operations, Applications and Components, V007T07A019, July 16–20, 2017
Publisher: American Society of Mechanical Engineers
Paper No: PVP2017-65769
https://doi.org/10.1115/PVP2017-65769
View Paper titled, Swelling of VVER-1000 Core Baffle: Numerical Modeling and Direct Measurement of its Geometrical Dimensions
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Topics: Computer simulation, Dimensions, Gages, Geometry, Nuclear power stations, Stress, Accounting, Boundary-value problems, Brittleness, Coolants
Journal Articles

A New Methodology for Structural Reliability Assessment of the Heat Exchanger Tubes of WWER Steam Generators

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Igor Orynyak, Maksym Zarazovskii, Mykhaylo Borodii
Journal: Journal of Pressure Vessel Technology
Publisher: ASME
Article Type: Research-Article
J. Pressure Vessel Technol. June 2017, 139(3): 031208.
Paper No: PVT-16-1071
https://doi.org/10.1115/1.4035414
Published Online: February 3, 2017
View Articletitled, A New Methodology for Structural Reliability Assessment of the Heat Exchanger Tubes of WWER Steam Generators
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Topics: Circuits, Fracture (Materials), Heat exchangers, Leakage, Nuclear power stations, Pressure, Probability, Boilers, Shapes, Statistics
Journal Articles

The Accounting for Geometrical Nonlinearity for Thin-Walled Pressurized Elastic Pipe With Long Axial Surface Crack

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Andrii Oryniak, Igor Orynyak
Journal: Journal of Pressure Vessel Technology
Publisher: ASME
Article Type: Research-Article
J. Pressure Vessel Technol. April 2017, 139(2): 021210.
Paper No: PVT-16-1012
https://doi.org/10.1115/1.4033703
Published Online: January 11, 2017
View Articletitled, The Accounting for Geometrical Nonlinearity for Thin-Walled Pressurized Elastic Pipe With Long Axial Surface Crack
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Topics: Finite element methods, Fracture (Materials), Pipes, Pressure, Stress, Surface cracks, Accounting, Bending (Stress)
Proceedings Papers

Water Hammer Event on Aboveground Section of Oil Piping During Hydro Test

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Igor Orynyak, Anatolii Batura, Iaroslav Dubyk
Proc. ASME. PVP2016, Volume 5: High-Pressure Technology; Rudy Scavuzzo Student Paper Symposium and 24th Annual Student Paper Competition; ASME Nondestructive Evaluation, Diagnosis and Prognosis Division (NDPD); Electric Power Research Institute (EPRI) Creep Fatigue Workshop, V005T05A024, July 17–21, 2016
Publisher: American Society of Mechanical Engineers
Paper No: PVP2016-63826
https://doi.org/10.1115/PVP2016-63826
View Paper titled, Water Hammer Event on Aboveground Section of Oil Piping During Hydro Test
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Topics: Pipes, Water hammer, Pipelines, Damage, Displacement, Dynamic testing (Materials), Geometry, Hydrostatic testing, Impulse (Physics), Springs
Proceedings Papers

Analysis of Water Hammer due to Sudden Rupture of Reactor Coolant System

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Iaroslav Dubyk, Igor Orynyak
Proc. ASME. PVP2016, Volume 4: Fluid-Structure Interaction, V004T04A021, July 17–21, 2016
Publisher: American Society of Mechanical Engineers
Paper No: PVP2016-63589
https://doi.org/10.1115/PVP2016-63589
View Paper titled, Analysis of Water Hammer due to Sudden Rupture of Reactor Coolant System
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Topics: Nuclear reactor coolants, Rupture, Water hammer, Stress, Accidents, Cooling, Design, Impulse (Physics), Shells, Structural stability
Proceedings Papers

The Application of Long and Short Cylindrical Shell Solutions for Stress and Flexibility Determination in a Single Mitred Bend

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Igor Orynyak, Andrii Bogdan, Iryna Selivestrova
Proc. ASME. PVP2016, Volume 1A: Codes and Standards, V01AT01A001, July 17–21, 2016
Publisher: American Society of Mechanical Engineers
Paper No: PVP2016-63598
https://doi.org/10.1115/PVP2016-63598
View Paper titled, The Application of Long and Short Cylindrical Shell Solutions for Stress and Flexibility Determination in a Single Mitred Bend
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Topics: Pipes, Stress, Pipe bends, Piping systems, Shells, Differential equations, Finite element methods, Finite element model, Membranes, Pressure
Proceedings Papers

Oore-Burns Function of Form Application in Numerical Treatment of Mode I Flat Crack Problem in Infinite Body

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Igor Orynyak, Anatolii Batura, Andrii Oryniak, Igor Lokhman
Proc. ASME. PVP2016, Volume 6A: Materials and Fabrication, V06AT06A003, July 17–21, 2016
Publisher: American Society of Mechanical Engineers
Paper No: PVP2016-63304
https://doi.org/10.1115/PVP2016-63304
View Paper titled, Oore-Burns Function of Form Application in Numerical Treatment of Mode I Flat Crack Problem in Infinite Body
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Topics: Fracture (Materials), Shapes, Polynomials, Numerical analysis, Approximation, Finite element methods, Finite element model, Modeling, Simulation, Theoretical methods
Proceedings Papers

The Method for Structural Reliability Estimation of the Heat Exchanger Tubes of Steam Generator of WWER NPPs

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Igor Orynyak, Maksym Zarazovskii, Mykhaylo Borodii
Proc. ASME. PVP2016, Volume 3: Design and Analysis, V003T03A045, July 17–21, 2016
Publisher: American Society of Mechanical Engineers
Paper No: PVP2016-63710
https://doi.org/10.1115/PVP2016-63710
View Paper titled, The Method for Structural Reliability Estimation of the Heat Exchanger Tubes of Steam Generator of WWER NPPs
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Topics: Boilers, Heat exchangers, Nuclear power stations, Reliability, Probability, Leakage, Pressure, Failure, Fracture (Materials), Fracture (Process)
Proceedings Papers

Assessment of Stress-Displacement State of Cable Suspended Pipeline Bridge During Inspection Pig Motion

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Igor Orynyak, Igor Burak, Sergiy Okhrimchuk, Andrii Novikov, Andrii Pashchenko
Proc. ASME. IPC2016, Volume 2: Pipeline Safety Management Systems; Project Management, Design, Construction and Environmental Issues; Strain Based Design; Risk and Reliability; Northern Offshore and Production Pipelines, V002T02A010, September 26–30, 2016
Publisher: American Society of Mechanical Engineers
Paper No: IPC2016-64197
https://doi.org/10.1115/IPC2016-64197
View Paper titled, Assessment of Stress-Displacement State of Cable Suspended Pipeline Bridge During Inspection Pig Motion
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Topics: Bridges (Structures), Cables, Displacement, Inspection, Pipelines, Stress, Pipes, Tension, Vibration, Weight (Mass)
Proceedings Papers

Application of the Structural Reliability Methods for Justification of Pressure Reduction of Periodic Hydrostatic Test for Primary Circuit of NPP WWER-1000

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Igor Orynyak, Volodymyr Kozlov, Mykhaylo Borodii, Maksym Zarazovskii
Proc. ASME. PVP2015, Volume 7: Operations, Applications and Components, V007T07A034, July 19–23, 2015
Publisher: American Society of Mechanical Engineers
Paper No: PVP2015-45573
https://doi.org/10.1115/PVP2015-45573
View Paper titled, Application of the Structural Reliability Methods for Justification of Pressure Reduction of Periodic Hydrostatic Test for Primary Circuit of NPP WWER-1000
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Topics: Circuits, Hydrostatic testing, Nuclear power stations, Pressure, Reliability, Fracture (Materials), Fracture (Process), Probability, Damage, Water
Proceedings Papers

Computational Aspect of Nonlinear Fracture Mechanics Application

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Igor Orynyak, Andrii Oryniak
Proc. ASME. PVP2015, Volume 1A: Codes and Standards, V01AT01A008, July 19–23, 2015
Publisher: American Society of Mechanical Engineers
Paper No: PVP2015-45838
https://doi.org/10.1115/PVP2015-45838
View Paper titled, Computational Aspect of Nonlinear Fracture Mechanics Application
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Topics: Fracture mechanics, Fracture (Materials), Computer software, Stress, Thermal stresses, Accounting, Ambiguity, Computation, Finite element methods, Finite element model