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The coupled corrosion-fatigue failure of steel wires is a prevalent and critical failure mode in cable structures. However, protective sheaths prevent simultaneous corrosion and fatigue, complicating failure analysis. Traditional methods based on damage mechanics and fracture mechanics have been widely used to study fatigue fracture. However, damage mechanics approaches are often computationally complex and difficult to apply in engineering practice, while fracture mechanics methods typically require the assumption of pre-existing cracks, limiting their real-world applicability. To address these limitations, this study proposes a comprehensive theoretical framework for evaluating the corrosion-fatigue failure of high-strength steel wires. First, the fatigue damage state of steel wires is assessed using S-N curves under non-corrosive conditions, assuming the protective sheath remains intact. Once damage to the sheath occurs, a corrosion kinetics model is employed to simulate the growth of corrosion pits in steel wires. The transition from corrosion pits to cracks is then predicted by determining the critical fatigue cycles required for crack initiation. Subsequently, crack propagation is analyzed using fracture mechanics principles and Franc3D software, enabling the estimation of the fatigue life of corroded steel wires. To validate the theoretical predictions, an experimental study is conducted to investigate the coupled effects of fatigue and corrosion in high-strength steel wires, where fatigue loading is applied prior to corrosion exposure. Comparison of experimental results with theoretical calculations reveals minimal deviation, confirming the accuracy and effectiveness of the proposed theoretical approach. In summary, the failure analysis methodology developed in this study offers a computationally efficient and practically applicable approach for assessing the corrosion-fatigue behavior of steel wires in cable structures. The method exhibits strong agreement with experimental observations and provides a valuable reference for the design, operation, and maintenance of cable structures. Furthermore, the proposed framework can be extended to other high-strength steel components exposed to coupled fatigue and corrosion conditions, contributing to the reliability and durability assessment of engineering structures in harsh environments.
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| 科 Family | 属数 Number of genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) | 属 Genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) |
|---|---|---|---|---|---|---|
| 鹅膏菌科Amanitaceae | 2 | 11 | 5.26 | 鹅膏菌属 Amanita | 10 | 4.78 |
| 小菇科 Mycenaceae | 2 | 12 | 5.74 | 丝盖伞属 Inocybe | 5 | 2.39 |
| 多孔菌科 Polyporaceae | 8 | 14 | 6.70 | 蜡蘑属 Laccaria | 5 | 2.39 |
| 红菇科 Russulaceae | 3 | 23 | 11.00 | 小皮伞属 Marasmius | 6 | 2.87 |
| 小菇属 Mycena | 11 | 5.26 | ||||
| 光柄菇属 Pluteus | 5 | 2.39 | ||||
| 红菇属 Russula | 17 | 8.13 | ||||
| 栓菌属 Trametes | 5 | 2.39 |
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