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Steel and Composite Structures
  Volume 50, Number 3, February 10 2024 , pages 363-374
DOI: https://doi.org/10.12989/scs.2024.50.3.363
 


Fatigue life evolution of steel wire considering corrosion-fatigue coupling effect: Analytical model and application
Yang Ding, Xiao-Wei Ye, Hong Zhang and Xue-Song Zhang

 
Abstract
    The fatigue life of steel wire is affected not only by fatigue load, but also by corrosion environment in service period. Specially, the corrosion pit will lead to stress concentration on the surface of steel wire inducing the formation of fatigue cracks, and the fatigue cracks will accelerate the corrosion process. Therefore, the corrosion fatigue of steel wire is a coupling effect. In this study, the corrosion-fatigue coupling life curve is derived with considering corrosion-fatigue pitting stage, corrosion-fatigue short crack stage and corrosion-fatigue long crack stage. In addition, the stress concentration factors of different corrosion pits are calculated by COMSOL software. Furthermore, the effect of corrosion environment factors, that is, corrosion rate, corrosion pit morphology, frequency and action factor of fatigue load, on fatigue life of steel wire is analyzed. And then, the corrosion-fatigue coupling life curve is compared with the fatigue life curve and fatigue life curve with precorrosion. The result showed that the anti-fatigue performance of the steel wire with considering corrosion-fatigue coupling is 68.08% and 41.79% lower than fatigue life curve and fatigue life curve with pre-corrosion. Therefore, the corrosion-fatigue coupling effect should be considered in the design of steel wire.
 
Key Words
     corrosion-fatigue coupling life curve; fatigue life curve with pre-corrosion; fatigue life curve; steel wire
 
Address
Yang Ding:1)Zhejiang Engineering Research Center of Intelligent Urban Infrastructure, Hangzhou City University, Hangzhou, 310015, China
2)Key Laboratory of Safe Construction and Intelligent Maintenance for Urban Shield Tunnels of Zhejiang Province,
Hangzhou City University, Hangzhou, 310015, China
3)Department of Civil Engineering, Hangzhou City University, Hangzhou 310015, China
4)State Key Laboratory of Mountain Bridge and Tunnel Engineering, Chongqing Jiaotong University, Chongqing 400074, China

Xiao-Wei Ye:Department of Civil Engineering, Zhejiang University, Hangzhou 310058, China

Hong Zhang and Xue-Song Zhang:State Key Laboratory of Mountain Bridge and Tunnel Engineering, Chongqing Jiaotong University, Chongqing 400074, China
 

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