Analysis of Fatigue Resistance of FH36 Shipbuilding Steel Plate

Author of the article:WANG Sunzhong1 , PENG Xingdong1 , ZHANG Peng2

Author's Workplace：1.School of Material and Metallurgy, University of Science and Technology Liaoning, Anshan 114051, China; 2. State Key Laboratory of Metal Material for Marine Equipment and Application, Anshan 114001, China

Key Words： FH36 steel; fatigue crack propagation; fracture toughness; stress intensity factor; ANSYS

Abstract：The Paris formula and fatigue fracture toughness of FH36 steel were calculated by means of log-log-linear fitting and J integral method. The fatigue crack propagation and fatigue fracture toughness fracture characteristics of FH36 were characterized by experiments and SEM, and the fatigue crack propagation process was simulated by ANSYS. The results show that the ductile fracture of fatigue fracture is microvoid coalescence mechanism of fracture, and the simulated variation trend between the stress intensity factor amplitude and crack length is consistent with that of experiment results.