Tungsten Inert Gas (TIG) welding is a widely used method in industries like automobile, aviation, and aerospace manufacturing. However, the thermal cycle from TIG welding can result in high residual stresses and deformation on the weld metal and heat-affected zone, which can negatively impact the mechanical performance of components. In comparison to experimental measurements, numerical simulation employing finite element methods (FEM) is the preferred method for predicting and analyzing welding residual stresses because it is less time-consuming, less expensive, and more versatile. Accurately predicting residual stress and deformation is crucial in manufacturing mechanical parts, as it improves reliability, limits errors, and minimizes costs.
Based on the ABAQUS software, uncoupled thermal–mechanical three-dimensional steel pipe unsteady heat transfer model was developed to predict the temperature field generated by a moving heat source. Goldak's heat source model was implemented by coding nonuniform distributed flux (DFLUX) in user subroutine to represent the ellipsoidal moving weld torch with front and rear power density distribution.
In this model, you will learn how to simulate the TIG welding on the steel pipe process using ABAQUS and how to conduct FE simulation using ABAQUS and FORTRAN user subroutine code. A method for analyzing transient temperature fields and residual stress states in SS304 steel pipe during welding can be studied.
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