Title: Mechanics of contact interaction and deformation of main pipelines in the conditions of extreme external actions

Authors: Nikolay Makhutov; Mikhail Gadenin; Alexander Cherniavsky; Oleg Cherniavsky; Vladimir Nadein

Addresses: Department of Strength, Survivability and Safety of Machines, Mechanical Engineering Research Institute of the Russian Academy of Sciences, 4 Maly Kharitonyevsky Pereulok, Moscow 101990, Russia ' Department of Structural Materials Science, Mechanical Engineering Research Institute of the Russian Academy of Sciences, 4 Maly Kharitonyevsky Pereulok, Moscow 101990, Russia ' Scientific and Engineering Center 'Reliability and Resource of Large Systems and Machines', South Ural State University, 76 Lenin Ave., Chelyabinsk 454080, Russia ' South Ural State University, 76 Lenin Ave., Chelyabinsk 454080, Russia ' LLC 'OGS – Energodiagnostika', 11, Khavskaya st., Moscow 115162, Russia

Abstract: Formulation and solution of a task for the composite engineering-geological interaction of a pipeline and a soil are considered. Finite element method is used for numerical analysis of the task, accounting for large displacements and corresponding strains under changing boundary conditions. The capability of the limit state reaching in the pipeline with loss of form stability is shown depending on pad layer and the pipe properties. It is demonstrated also that safety maintenance could be provided by usage of ribs, formed on a pipe by a cyclic thermomechanical actions.

Keywords: structural material; deformation; strength; contact interaction; pipeline integrity; seismic steadiness; modelling; finite element method.

DOI: 10.1504/IJMSI.2020.107302

International Journal of Materials and Structural Integrity, 2020 Vol.14 No.1, pp.54 - 64

Received: 22 Aug 2019
Accepted: 22 Aug 2019
Published online: 12 May 2020 *