Fretting fatigue tests and microstructure analysis of bridge stay cable wires

Chehrazi, Ali; Liang, W.; Huda, Nazmul; Walbridge, Scott

doi:10.1111/ffe.14064

Cited by 3 publications

(3 citation statements)

References 45 publications

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“…Recent tests at TU Berlin and the University of Waterloo show that the COF of cables in contact with the saddle can range from 0.6 to 0.8 (Chehrazi 2022; Mohareb 2020). Therefore, it was decided to perform the wear modelling process and fretting fatigue life evaluation using a COF of 0.7, which falls between the reported COFs in these works.…”

Section: Modelling and Analysismentioning

confidence: 99%

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Assessment of critical parameters affecting fretting fatigue life of bridge stay cables at saddle supports

Chehrazi,

Walbridge

2024

Advances in Structural Engineering

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Saddle systems are a popular solution for supporting cables in cable-stayed bridges. Fretting fatigue failure of cables at saddle supports is a primary design consideration for these systems. Critical parameters that affect the fretting fatigue life of the cables are the contact forces and the slip displacements at the contact points between the cables and the saddle. Determining these critical parameters is the first step in evaluating the fretting fatigue life of the cables. Wear in the contact points between the cables and the saddle can affect the load distribution in saddle systems and consequently affect these critical parameters. However, the effect of wear has not been studied in the previous works. This paper first discusses the methods proposed in the literature for evaluating contact forces and slip displacements in the contact points between a cable and a saddle. Then, a finite element model of the problem and a framework for modelling the wear are presented. Finally, fretting fatigue life is determined based on the different studied approaches. The main highlights of the current study are considering the effect of wear in the simulation and employing an enhanced FE model for slip displacement calculations. The results of the basic model without wear effects showed that the first contact point between the cable and the saddle is critical for fatigue failure. However, by incorporating wear in the model, the contact force at the first point dropped and the second contact point became critical; this is in line with the observations in large-scale fatigue tests of saddle systems.

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Section: Modelling and Analysismentioning

confidence: 99%

“…Looking at this equation, apart from the SWT parameter, cyclic material properties (Coffin-Manson parameters) are required. Coffin-Manson parameters based on the tests performed in (Chehrazi 2022) were used in this analysis: σf′ = 2183 MPa, b=−0.0657, εf′=1.99, and c=−0.8092.…”

Section: Modelling and Analysismentioning

confidence: 99%

Assessment of critical parameters affecting fretting fatigue life of bridge stay cables at saddle supports

Chehrazi,

Walbridge

2024

Advances in Structural Engineering

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“…The design of this steel encompasses several key performance indicators, including but not limited to high tensile strength, good toughness, and excellent fatigue resistance. These properties enable the bridge cable steel to withstand immense tensile forces without fracturing, ensuring the safety and reliability of the structure [ 1 , 2 , 3 ]. In bridge design, the use of higher-performance bridge cable steel allows for a reduction in the structure’s self-weight, thereby enabling the possibility of longer-span bridge designs [ 4 ].…”

Section: Introductionmentioning

confidence: 99%

The Performance of Niobium-Microalloying Ultra-High-Strength Bridge Cable Steel during Hot Rolling

Zhou,

Yu,

Chen

et al. 2024

Materials

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This study focuses on exploring the effects of niobium (Nb)-microalloying on the properties of steel for ultra-high-strength bridge cables during hot-rolling processes. We employed a combination of dual-pass compression tests, stress–strain curve analysis, and Electron Backscatter Diffraction (EBSD) techniques to investigate the influence of Nb-microalloying on the static recrystallization behavior and grain size of the steel. The key findings reveal that Nb-microalloying effectively inhibits static recrystallization, particularly at higher temperatures, significantly reducing the volume fraction of recrystallized grains, resulting in a finer grain size and enhanced deformation resistance. Secondly, at a deformation temperature of 975 °C, Nb-containing steel exhibited finer grain sizes compared to Nb-free steel when held for 10 to 50 s; however, the grain size growth accelerated when the hold time exceeded 50 s, likely linked to the increased deformation resistance induced by Nb. Lastly, this research proposes optimal hot-rolling process parameters for new bridge cable steel, recommending specific finishing rolling temperatures and inter-pass times for both Nb-containing and Nb-free steels during the roughing and finishing stages. This study suggests optimal hot-rolling parameters for both Nb-containing and Nb-free steels, providing essential insights for improving hot-rolling and microalloying processes in high-carbon steels for bridge cables.

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A comparative study of several life prediction models based on the critical plane approach for fretting fatigue crack initiation

Shu,

Yang,

Liu

et al. 2024

Fatigue Fract Eng Mat Struct

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To reasonably forecast the crack initiation characteristics of fretting fatigue, this study evaluates the accuracy of several damage models. The existing experimental and simulation investigations are compared, noting the similarities and differences in the crack initiation location, crack orientation angle, and crack initiation life predicted by various damage models. It is crucial to employ a reasonable and reasonable damage prediction model of fretting crack initiation life, as fretting fatigue, a phenomenon of mechanically fastened connecting parts, can considerably reduce the fretting fatigue life of the components. This paper compares the fatigue damage prediction models of fretting fatigue specimens under partial slip conditions, and it will help researchers understand the benefits and drawbacks of various damage models and give them the knowledge and foundation to select the more reasonable fretting fatigue damage model.

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Fretting fatigue tests and microstructure analysis of bridge stay cable wires

Cited by 3 publications

References 45 publications

Assessment of critical parameters affecting fretting fatigue life of bridge stay cables at saddle supports

Assessment of critical parameters affecting fretting fatigue life of bridge stay cables at saddle supports

The Performance of Niobium-Microalloying Ultra-High-Strength Bridge Cable Steel during Hot Rolling

A comparative study of several life prediction models based on the critical plane approach for fretting fatigue crack initiation

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