About this Abstract |
| Meeting |
2026 AWS Professional Program
|
| Symposium
|
2026 AWS Professional Program
|
| Presentation Title |
Experimentally Validated Three-Dimensional Quasi-Steady Thermal Modeling of GMAW on Thin Steel Plates |
| Author(s) |
Mehdi Mortazavi Yazdi, Daryush K Aidun |
| On-Site Speaker (Planned) |
Mehdi Mortazavi Yazdi |
| Abstract Scope |
A three-dimensional quasi-steady heat transfer model for Gas Metal Arc Welding (GMAW) of thin steel plates is developed using a finite difference method in an arc-fixed reference frame, in which the workpiece translates at the welding travel speed. The model incorporates temperature-dependent material properties including latent heat of fusion, a double-ellipsoid volumetric heat source, and nonlinear combined convection–radiation surface boundary conditions. The computational domain is truncated using an experimentally informed criterion.
Butt weld experiments were conducted on thin steel plates instrumented with thermocouples at standardized distances from the weld centerline. The quasi-steady moving-frame equivalence is used to compare the predicted spatial temperature distribution directly against measured thermal cycles, and post-weld characterization of fusion zone geometry provides independent validation. The validated framework is used to quantify the influence of plate width on heat source parameter calibration and transferability across specimen geometries. |
| Proceedings Inclusion? |
Undecided |