The Effect of Heat Input Parameters on Residual Stress Distribution by Numerical Simulation

This paper deals with Numerical Simulation to analyze the behavior of residual stresses in the plate. The residual stresses at the surface of some weld specimen by using the finite element technique. The results of the numerical simulation analysis were compared with three cases data to evaluate the accuracy of Goldak model (double ellipsoidal heat distribution model). Based on this study, a modeling procedure with reasonable accuracy was investigated. The developed finite element modeling was used to investigate the effects of welding heat input on magnitude and distribution of welding residual stresses in a welded plate made of steel. The different directions of residual stresses in the surface of the plate of 25 mm thick for V-groove shape were studied. It is shown that the welding heat input parameters have a significant effect on the magnitude and distribution of residual stresses.