이론/모형

• A transient thermal and elasto-plastic mechanical analyses with an axis symmetric two-dimensional model were performed with the commercial software program ABAQUS [3], Heat flow in welding process was evaluated by a non-linear transient analysis. The results of numerical analysis for the residual stresses in multi-pass butt weld were compared with those of the measurements data and recommended code profiles which is defined by analytical methods.
• a crack. The SIF has been determined by using a Green's function method in conjunction with the finite element analysis for a T-butt weld[4].
• The calculation of the stress intensity factors for the plate T-butt weld has been accomplished using a FE analysis with cracked model in conjunction with the Green's function. The FE models with a specific crack length (a/w) of 0.
• In this study, two shapes of weldments, plate T-butt and pipe-butt, are investigated using the recommended codes and finite element method.