Analysis of the trunk oil pipeline survivability in the zone of the butt welded joint

Article

Published: 09.04.2021

Authors: Pokrovskiy A.M., Dubovitsky E.I.

Published in issue: #4(112)/2021

DOI: 10.18698/2308-6033-2021-4-2069

Category: Mechanics | Chapter: Mechanics of Deformable Solid Body

The article describes the development of a technique for analyzing the survivability of the trunk pipeline in the zone of the transverse weld during operation, taking into account the residual welding stresses. The calculation of residual welding stresses was performed by solving the problem of thermoelasto-viscoplasticity for a material with a non-stationary structure by the finite element method. Solving the nonlinear nonstationary heat conduction problem was carried out by the finite difference method using boundary conditions of the third kind. Modeling the kinetics of transformation of austenite into ferrite-pearlite and bainite under non-isothermal conditions during welding was carried out on the basis of the theory of isokinetic reactions. The calculation of survivability is based on the Irwin criterion and the Paris formula.

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