Damage evolution simulation and life prediction of high-strength steel wire under the coupling of corrosion and fatigue

摘要

A simulation method is proposed to study corrosion fatigue (CF) damage evolution and predict the CF life of steel wire. The initial finite element model of corroded steel wire is developed by the cellular automaton and the damage evolution simulation is realized by a user material subroutine based on CF damage model. The proposed method can achieve the expected goals compared with experimental results. The mutual promotion of corrosion and fatigue results to a large performance degradation in steel wire. The damage evolution of random pit model is more complex and the CF life is shorter than semi-ellipsoid pit models.