The fatigue life of overhead conductors is usually evaluated through experimental tests on clamp/conductor assemblies. Some recent studies aim to estimate the fatigue life of conductors using uniaxial tests on individual strands. This paper presents an innovative method for assessing the fretting fatigue life of overhead conductors combining the effect of both tension and bending loadings. It consists of coupling a numerical approach based on modeling the clamp/conductor assembly using the finite element method and an experimental one based on fretting fatigue tests on individual wires. A biaxial fretting fatigue test rig has been developed and validated through preliminary tests performed on 1350‐H19 aluminum wires under uniaxial and an equivalent biaxial loading. Tension and bending loadings obtained from the numerical model were then applied on individual wires. Results showed a good correspondence with existing experimental data of the fatigue tests carried on the aluminum conductor steel reinforced (ACSR) Bersfort conductor with a metal‐to‐metal suspension clamp.

中文翻译：

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使用线夹/导体数值模型和单根线的双轴微动疲劳试验评估架空导体的微动疲劳寿命

架空导体的疲劳寿命通常通过夹具/导体组件的实验测试来评估。最近的一些研究旨在使用单根绞线的单轴测试来估计导体的疲劳寿命。本文提出了一种创新方法，该方法结合了拉伸和弯曲载荷的作用来评估架空导体的微动疲劳寿命。它包括耦合一种基于有限元方法对夹具/导体组件建模的数值方法，以及一种基于对单根导线进行微动疲劳试验的实验方法。已经开发了双轴微动疲劳试验台，并通过在单轴和等效双轴载荷下对1350-H19铝线进行的初步测试进行了验证。然后将从数值模型获得的拉伸和弯曲载荷施加到单根钢丝上。结果表明，该疲劳测试与使用金属对金属悬挂夹的铝导体钢增强（ACSR）Bersfort导体进行的疲劳试验的现有实验数据非常吻合。