The Paton Welding Journal, 2026, №04

2026 №04 (03)

DOI of Article 10.37434/tpwj2026.04.04

2026 №04 (05)

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The Paton Welding Journal, 2026, #4, 24-36 pages

Computer program for modelling stress-strain state of a circumferential welded joint

L.M. Lobanov, O.V. Makhnenko, O.S. Milenin, O.A. Velykoivanenko, G.P. Rozynka, N.R. Basystyuk, 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 “Girth Weld” computer program enables computational analysis of following phenomena in circumferential welded joints (girth welds) of pipelines and pressure vessels, including: mechanical properties of weld metal and heat-affected zone (HAZ) , residual stresses and deformations, stress-strain state redistribution under post-weld heat treatment, operational loads, or pressure testing, structural integrity assessment and service life prediction for welds with discontinuities (detected by non-destructive testing or postulated). The program requires no specialized skills in computational methods, automating key processes such as parametric modelling of multipass girth welds, finite element mesh generation, solver execution and results visualization. Despite minimal hardware and time requirements, “Girth Weld” ensures high accuracy through advanced modelling of welding physico-chemical processes, efficient algorithms for nonlinear problems and optimized solutions for high-order differential equations.
Keywords: multipass welding, girth weld, computer program, mathematical modelling, finite element method, mechanical properties, residual stresses, deformations, post weld heat treatment, operational loads, defect acceptability

Received: 24.11.2025
Received in revised form: 10.03.2026
Accepted: 30.04.2026

References

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Suggested Citation

L.M. Lobanov, O.V. Makhnenko, O.S. Milenin, O.A. Velykoivanenko, G.P. Rozynka, N.R. Basystyuk, G.Yu. Saprykina (2026) Computer program for modelling stress-strain state of a circumferential welded joint. The Paton Welding J., 04, 24-36. https://doi.org/10.37434/tpwj2026.04.04

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