Weldment and weld repairs can often result in residual stresses remaining at the completion of the welding process. These can have an effect on the strength of the weldment. LPI has utilized the ANSYS finite element code to simulate the welding process and heat generated during the weld pass. From simulation, remaining residual stresses can be determined. Conversely, weld process and cooling times can be optimized to reduce induced residual stresses. Analyses can also be supplemented with field measurement when necessary.