A thermal coupling methodology of an arc-plasma and weld pool, a TIG welding model

Christopher Nahed (1) , Stephane Gounand (2) , Pierre Verpeaux (3)

1 LM2S - Laboratoire de Mécanique Systèmes et Simulation
2 LTA - Laboratoire Technologie d'Assemblage
3 SEMT - Service d'Etudes Mécaniques et Thermiques

A focus on a novel conjugate heat transfer method used to couple the arc-plasma and workpiece (weld pool included) domains in a unified Tungsten Inert Gas welding model is presented in this paper. The method uses a non-associated relation to implement an asymmetric thermal constraint when coupling the arc and workpiece domains. The method is shown to be conservative and robust. The algorithm is used in a unified 3D TIG welding model with displacement effects. The promising simulation results are compared to experimental work from the literature.

Mots clés: CAST3M; Coupling Methodology; Multiphysics; Thermics; Finite Element Method; Lagrange multiplier; Asymmetric constraint

Domaines: Mécanique des fluides [physics.class-ph]

Christopher Nahed, Stephane Gounand, Pierre Verpeaux. A thermal coupling methodology of an arc-plasma and weld pool, a TIG welding model. NAFEMS World Congress 2023 (NWC23), NAFEMS, May 2023, Tampa (Florida), United States. ⟨hal-04108128⟩