Fatigue Analysis of Penetration Assembly Joined by Multi-Pass Welding
Due to high centralized instantaneous heat input in the process of the welding, a great deal of residual stresses and distortions should be brought in the welded structures, which can heavily influence the capability and reliability of the structure. Residual stresses and welding fatigue behaviors of stainless steel penetration assembly joined by multi-pass welding are studied in this paper. The distribution of transient temperature field and real-time dynamic stresses field in the welded region must be calculated first. Based on the residual stresses, the random wave load putting on the structure and fatigue factors, according to Miner fatigue damage law, some fatigue behaviors such as fatigue life and remaining life are obtained.
A. Saimoto and M.H. Aliabadi
H. Li et al., "Fatigue Analysis of Penetration Assembly Joined by Multi-Pass Welding", Key Engineering Materials, Vols. 452-453, pp. 317-320, 2011