Characteristics of Residual Stress Relaxation for a Nuclear Weldment by MSR Loads

기계적 하중에 의한 원전 용접부의 잔류응력 이완 특성

Residual stresses, which can be produced during the manufacturing process, play an important role in an industrial field. Residual stresses of structures by welding process are exerting negative effect on the fatigue behavior and safety of structure. Results from the elasto-plastic finite element analysis of the welds for a nuclear component, the residual stress distribution after welding. In this study, a finite element technique is developed to simulate the relaxation of the residual stresses due to the mechanical loads of welds.