Modelo matemático para simulação de soldagem TIG alimentado utilizando a técnica de empilhamento

Abstract

Mathematical methods are increasingly being used to aid in hypothetical projections and real-world simulations. Simulation software uses mathematics as the basis for solving what-if scenarios. In this way, it is possible to project situations involving heat transfer and temperature rise in materials with well-defined physical characteristics. The present work compared the temperatures obtained in the computer simulation using the mathematical finite element method and those captured by the K-type thermocouple in a SAE 1020 steel sheet that incorporated P20 steel solid wire by the pulsed fed TIG welding process using the stacking technique. Different weld bead and mesh configurations were used in the simulation to define the best mathematical model. With this, the results of maximum temperature reached and its variation by time were obtained. Finally, the analysis of errors related to the process was performed and the best configuration was defined based on the temperatures captured by the thermocouple. Thus, validating the mathematical models proposed in the present work.