The Paton Welding Journal, 2025, №08

2025 №08 (05)

2025 №08 (07)

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The Paton Welding Journal, 2025, #8, 55-67 pages

Computer software for modeling a circumferential welded joint

L.M. Lobanov, O.V. Makhnenko, O.S. Milenin, O.A. Velykoivanenko, G.P. Rozynka, N.R. Basystuk, G.Yu. Saprykina

E.O. Paton Electric Welding Institute of the NASU. 11 Kazymyr Malevych Str., 03150, Kyiv, Ukraine. E-mail: makhnenko@paton.kiev.ua

Abstract
The specialized software “Girth Weld” is developed by specialists of the PWI and allows for typical cases of welded girth joints of pipelines and cylindrical pressure vessels to predict the mechanical properties of the weld metal and the heat-affected zone (HAZ), residual stresses and distortions, to determine the redistribution of the stress-strain state as a result of postweld heat treatment, operational and test loading, to assess the structure integrity and service life of welded structures with discontinuity defects that are detected by non-destructive testing or are postulated. The use of this software does not require special knowledge in the calculation methods due to the full automation of the processes of creating a mathematical model of a multipass girth welded joint, dividing the area into finite elements, searching for a solution and visualizing the results. At the same time, high accuracy of predictive results is ensured with limited requirements for computer and time resources through the use of modern approaches to modeling physical and chemical processes during welding and effective algorithms for solving nonlinear problems and systems of high-order differential equations.
Keywords: girth welded joint, multipass welding, software, mathematical modeling, finite element method, mechanical properties, residual stresses, distortions, postweld heat treatment, operational loads, defect acceptability

Received: 28.05.2025
Received in revised form: 03.07.2025
Accepted: 07.08.2025

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Suggested Citation

L.M. Lobanov, O.V. Makhnenko, O.S. Milenin, O.A. Velykoivanenko, G.P. Rozynka, N.R. Basystuk, G.Yu. Saprykina (2025) Computer software for modeling a circumferential welded joint. The Paton Welding J., 08, 55-67.

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