Thermo-Mechanical FEM Study of SMAW Parameter Effects in S355J2+N / ASTM A572 Gr.50 Dissimilar Steel Joints
Estudio termomecánico mediante el método de elementos finitos de los efectos de los parámetros de la soldadura SMAW en uniones de aceros disímiles S355J2+N / ASTM A572 Gr.50
Estudo termomecânico por elementos finitos dos efeitos dos parâmetros de soldagem SMAW em juntas de aços dissimilares S355J2+N / ASTM A572 Gr.50
| 2026 | |
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Método de elementos finitos (MEF) Modelo elipsoidal doble de Goldak SMAW Mecánica de sólidos Distribución térmica Finite Element Method (FEM) Goldak’s double ellipsoidal model SMAW Solid Mechanics Thermal distribution Método dos Elementos Finitos (MEF) Modelo elipsoidal duplo de Goldak SMAW Mecânica dos Sólidos Distribuição térmica |
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| Español | |
| Universidad de Montevideo | |
| REDUM | |
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https://revistas.um.edu.uy/index.php/ingenieria/article/view/1968
https://hdl.handle.net/20.500.12806/3441 |
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| Acceso abierto | |
| Atribución 4.0 Internacional |
| Sumario: | Shielded Metal Arc Welding (SMAW) is widely employed in structural steel fabrication; however, the thermo-mechanical response of dissimilar structural steel joints remains insufficiently explored through numerical modeling. In this study, a three-dimensional transient thermo-mechanical finite element model is developed to investigate SMAW of dissimilar S355J2+N and ASTM A572 Grade 50 steel plates. Goldak’s double-ellipsoidal heat source is implemented to represent arc heat input, and a Box–Behnken design is employed to systematically examine the influence of welding current, voltage, and travel speed. The analysis focuses on peak temperature, out-of-plane distortion, and elastic stress indicators derived from a linear thermo-elastic formulation. The results indicate that welding current predominantly governs peak temperature, while travel speed has the strongest influence on thermal gradients and distortion behavior; voltage exhibits a secondary but non-negligible effect on heat distribution. Simulated thermal and deformation trends are benchmarked against published experimental and numerical studies on comparable structural steels and show consistent qualitative behavior. Owing to the absence of plasticity, temperature-dependent material properties, and direct experimental validation, stress results are interpreted solely as qualitative indicators rather than physically realistic residual stresses. The study provides a structured thermo-elastic FEM and design-of-experiments–based sensitivity framework for a dissimilar structural steel combination not previously reported in SMAW numerical studies, offering practical insight into parameter screening for thermal and distortion control in structural steel fabrication. |
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