PSI - Issue 40

ScienceDirect StructuralIntegrity Procedia 00 (2022) 000 – 000 StructuralIntegrity Procedia 00 (2022) 000 – 000 Available online at www.sciencedirect.com Available online at www.sciencedirect.com Sci nceDire t Available online at www.sciencedirect.com ScienceDirect

www.elsevier.com/locate/procedia www.elsevier.com/locate/procedia

Procedia Structural Integrity 40 (2022) 214–222

© 2022 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of the scientific committee of the15th International Conference on Mechanics, Resources and Diagnostics of Materials and Structures. Abstract Consideration is given to the mutual effect of pipeline bending, internal and external pressures, compression force effect, fluid flow along the pipeline with pre-assigned density, axisymmetric expansion of the pipe and its longitudinal contraction, change in the pipe wall temperature, and formation of arched ejections. An elastic pipeline is fixed on clamped sliding supports which do not hinder the fluid flow inside the pipeline along its axis. On the supports, both the deflection and the rotation angle are equal to zero. The pipeline is subjected to longitudinal compression. Compression force, pressures inside and outside the pipeline and velocity of fluid flow along the pipeline change independently of each other. This research treats the static interaction of instabilities depending on compression force, internal and external pressures, velocity of fluid flow, axisymmetric expansion of the pipe, and change in the pipe wall temperature. Flexural stiffness, tensile forces and external hydrostatic pressure stabilize the pipeline, while compression forces, internal hydrostatic pressure, fluid motion at any velocity inside the pipeline and an increase in the pipe wall temperature destabilize it. With an increase in the yield point of the pipeline material and the distance between the supports, the acceptable amplitude of arched ejection increases as well. With an increase in the internal pressure of the pipeline, the acceptable amplitude of arched ejection tends to be reduced. The obtained results enable analyzing the stability of pipeline systems. These results can be applied to analyzing static stability of pipelines at the stage of design, performance and elimination of arched ejections. © 2022 The Authors. Published by ELSEVIER B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of the scientific committee of the15th International Conference on Mechanics, Resource and Diagnostics of Materials and Structures. Keywords: Pipeline; Pressure; Interaction of instabilities; Static loading; Critical compressive load; Arched ejection; 15th International Conference on Mechanics, Resource and Diagnostics of Materials and Stru tures Determining pipeline parameters during the formation of arched ejection A.G. Khakimov* Mavlyutov Institute of Mechanics, Ufa Federal Research Centre, Russian Academy of Sciences, Ufa, 450054, Russia Abstract Consideration is given to the mutual effect of pipeline bending, internal and external pressures, compression force effect, fluid fl w along the pipeline wi pre-assigned density, axisymmetric expansion of the pipe and its longitudinal c traction, change n the pipe wall tem erature, and formation of arched ejections. An el stic pipelin is fixed on clampe sliding supports which do not h nder the fluid flow inside the pipeline along its axis. On the supports, both the deflection and the rotation angle are equal t zero. Th pipeline is subjected to longitudinal compres ion. Compression f rce, pressures inside and ou side the pip line and v l city of fluid flow along the pipel ne change independently of each other. This research treats the static interaction of instabilities depending on compr ss on force, i ternal and external pr ssures, velocity of fluid flow, axisymmetric exp nsi the pipe, and cha ge in the pipe wall temperature. Flexural stiff ess, t n il forces and external hydrostatic pressure stabilize the pipel n , while compression forces, internal hydrostatic pressure, fluid motion at any velocity inside the pipeline and an ncreas in the pipe wall te rature destabiliz it. With an in rease in the yield poi t of the pipel ne material and the distance between the su ports, the acc ptabl amplitud of arc ed eje tion increases as well. Wit an incr ase in the internal pressure of the pipeline, the acceptable mplitude of arched ejection tends to b r duced. The ob ained result enable analyzing the stability of systems. Thes results can be applied to a alyzing static stability of pipeli s at the stage of design, perform nce and elimination of arched ejections. © 2022 The Authors. Published by ELSEVIER B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of scientific committe of the15th International C ference on Mechanics, Resource and Diagnostics of Materials and Structures. Keywords: Pipeline; Pressure; Interaction of instabilities; Static loading; Critical compressive load; Arched ejection; 15th International Conference on Mechanics, Resource and Diagnostics of Materials and Structures Determining pipeline parameters during the formation of arched ejection A.G. Khakimov* Mavlyutov Institute of Mechanics, Ufa Federal Research Centre, Russian Academy of Sciences, Ufa, 450054, Russia

* Corresponding author. Tel.: +7-917-414-3711 E-mail address: hakimov@anrb.ru * Corresponding author. Tel.: +7-917-414-3711 E-mail address: hakimov@anrb.ru

2452-3216 © 2022 The Authors. Published by ELSEVIER B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of the scientific committee of the15th International Conference on Mechanics, Resource and Diagnostics of Materials and Structures. 2452-3216 © 2022 The Authors. Published by ELSEVIER B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of the scientific committee of the15th International Conference on Mechanics, Resource and Diagnostics of Materials and Structures.

2452-3216 © 2022 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of the scientific committee of the15th International Conference on Mechanics, Resources and Diagnostics

of Materials and Structures. 10.1016/j.prostr.2022.04.029