A Fatigue Damage Model for Corroded Steel Wires Based on Cellular Automata and Continuum Damage Mechanics

In this paper, a simulation method of fatigue damage evolution based on the cellular automata model and continuum damage mechanics was developed to study the fatigue performance of corroded steel wires. Firstly, a cellular automaton corrosion model was established based on the corrosion electrochemical reaction, and a solid model of uniform corroded steel wire with corrosion pits was obtained by the cellular automaton corrosion model. Then based on the continuum damage mechanics, a fatigue damage evolution model of steel wire was established, and a fatigue damage UMAT subroutine was compiled according to the damage evolution model. Combined with the corroded steel wire solid model and the UMAT subroutine, the fatigue damage evolution process of corroded steel wire was simulated, and the fatigue performance of parallel steel wire under different corrosion degrees and stress amplitude was studied. The influence of rough corrosion surface and fatigue stress amplitude of uniform corroded steel wire on the fatigue life of steel wire was fully considered in this paper.