METHOD FOR SIMPLE THREE-DIMENSIONAL ANALYSIS OF WELDING DEFORMATION AND RESIDUAL STRESS

摘要

PROBLEM TO BE SOLVED: To provide a method for simple three-dimensional analysis of welding deformation and a residual stress which attains sharp reduction of the time for the analysis and enables highly accurate analysis of the welding deformation and the residual stress not only of the top side of a workpiece, but also of the bottom side thereof.;SOLUTION: This method for analysis of the welding deformation and the residual stress is for analyzing the stress remaining after welding and the deformation, including shrinkage or distortion, arising in welding. Herein a transient temperature in one portion 1A in the direction of a weld line L of a flat plate 1 being a three-dimensional model is calculated by performing a nonsteady heat conduction analysis in consideration of transfer of a heat source S, and a thermoelasticity-plasticity analysis based on one portion 1A of the three-dimensional model is performed, using the transient temperature resulted from the nonsteady heat conduction analysis based on one portion 1A of the three-dimensional model, while generalized plane distortion simulation that regulates displacement in the outward direction of the opposite end faces 1d and 1e in one portion 1A of the flat plate 1 being the three-dimensional model is made a boundary condition.;COPYRIGHT: (C)2010,JPO&INPIT