Evaluation Effects of Modeling Parameters on the Temperature Fields and Residual Stresses of Butt-Welded Stainless Steel Pipes

In this paper, the e ects of modeling parameters on the temperature eld and residual stresses of butt-welded stainless steel pipes were investigated by using nite element modeling in ABAQUS code. The investigated parameters included, heat ux distribution, latent heat, and heat ux type. The birth and death techniques were utilized to consider mass addition from Y308L ller metal into the weld pool. The moving heat source and convection heat transfer were also modeled by a user subroutine DFLUX and FILM in ABAQUS code. In this work, for veri cation of FE modeling the temperature elds and residual stresses were compared with available experimental results. The simulation results showed that heat ux with a double ellipsoidal distribution proposed by Goldak associated with latent heat parameter and employed a fully volu- metric arc heat input, representing the best match with the experimental data.