PSI - Issue 50

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ScienceDirect Available online at www.sciencedirect.com ScienceDirect Structural Integrity Procedia 00 (2022) 000 – 000 Available online at www.sciencedirect.com ScienceDirect Structural Integrity Procedia 00 (2022) 000 – 000 Available online at www.sciencedirect.com

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

Procedia Structural Integrity 50 (2023) 57–64

© 2023 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 the MRDMS 2022 organizers Abstract In the extractive industries of the oil and gas industry, multi-span pipelines with lodgement-type supports are widely used. In the contact area of the pipeline with the support, contact stresses arise, created by the internal pressure of the pipeline, weight and wind load, and which can change during operation depending on the load. The assessment of the service life of such pipeline structures is an urgent technical and economic problems, which allows not only to prevent man-made and environmental disasters, but also to save material. This paper presents a method for calculating the fatigue of a steel cylindrical shell that is in contact with a rigid or elastic support of the lodgement type. Shell fatigue analysis is performed for contact stresses, which are determined by solving the corresponding contact problem. When calculating the fatigue of the shell, the linear damage summation hypothesis and the modified model of cyclic degradation of the material were used. © 2023 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 the MRDMS 2022 organizers Keywords: shell, contact problem, high-cycle fatigue, linear hypothesis, model of material cyclic degradation, service life. 1. Introduction The service life, durability and safety of operation are an important indicator in the design of pipelines that transport liquid and gaseous materials. In the oil and gas industry, multi-span pipelines with lodgement-type supports are widely used. In the area of contact between the pipeline and the support, contact stresses arise, which can vary depending on the type of loading created by the internal pressure of the pipeline, weight and wind loads. To determine these contact stresses, it is necessary to solve the contact problem of the interaction of a cylindrical pipe 16th International Conference on Mechanics, Resource and Diagnostics of Materials and Structures (MRDMS 2022) Fatigue of a cylindrical shell lying on a rigid bed I.G. Emel'yanov*, D.A. Ogorelkov Institute of Engineering Science, Ural Branch of the Russian Academy of Sciences, 34 Komsomolskaya St,Ekaterinburg, 620046, Russia Abstract In the extractive industries of the oil and gas industry, multi-span pipelines with lodgement-type supports are widely used. In the contact area of the pipeline with the support, contact stresses arise, created by the internal pressure of the pipeline, weight and wind load, and which can change during operation depending on the load. The assessment of the service life of such pipeline structures is an urgent technical and economic problems, which allows not only to prevent man-made and environmental disasters, but also to save material. This paper presents a method for calculating the fatigue of a steel cylindrical shell that is in contact with a rigid or elastic support of the lodgement type. Shell fatigue analysis is performed for contact stresses, which are determined by solving the corresponding contact problem. When calculating the fatigue of the shell, the linear damage summation hypothesis and the modified model of cyclic degradation of the material were used. © 2023 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 the MRDMS 2022 organizers Keywords: shell, contact problem, high-cycle fatigue, linear hypothesis, model of material cyclic degradation, service life. 1. Introduction The service life, durability and safety of operation are an important indicator in the design of pipelines that transport liquid and gaseous materials. In the oil and gas industry, multi-span pipelines with lodgement-type supports are widely used. In the area of contact between the pipeline and the support, contact stresses arise, which can vary depending on the type of loading created by the internal pressure of the pipeline, weight and wind loads. To determine these contact stresses, it is necessary to solve the contact problem of the interaction of a cylindrical pipe 16th International Conference on Mechanics, Resource and Diagnostics of Materials and Structures (MRDMS 2022) Fatigue of a cylindrical shell lying on a rigid bed I.G. Emel'yanov*, D.A. Ogorelkov Institute of Engineering Science, Ural Branch of the Russian Academy of Sciences, 34 Komsomolskaya St,Ekaterinburg, 620046, Russia

* Corresponding author. Tel.: +7-922-207-3447. E-mail address: emelyanov.ig.2016@mail.ru * Corresponding author. Tel.: +7-922-207-3447. E-mail address: emelyanov.ig.2016@mail.ru

2452-3216 © 2023 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 the MRDMS 2022 organizers 2452-3216 © 2023 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 the MRDMS 2022 organizers

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