Abstract – This article presents the design, production and testing of an experimental device that seeks to evaluate fretting fatigue of wires taken from conductors used in energy transmission lines. The fretting device has three independent actuators that allow tests to be carried out under controlled load (or displacement). Thus, the effect of relevant parameters to the fretting fatigue process (such as normal, tangential and bulk forces, wear level, and wear surface morphology) can be studied. To evaluate the device performance, tests were carried out on 6201 aluminum alloy wires, considering two different contact normal forces, P. Results showed that, for lives greater than 106 cycles, the increase of P from 250 to 500 N produced a substantial reduction on fatigue strength when compared to tests of smooth wire specimens. The SEM images and EDS analyses after the fretting fatigue test demonstrate that the wire-wire marks generated by the device show all the characteristics found in wires of internal layers of overhead conductors fractured by fatigue under fretting conditions.

中文翻译：

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架空导线6201铝合金线微动疲劳试验装置

摘要 – 本文介绍了一种实验装置的设计、生产和测试，该装置旨在评估取自能量传输线中使用的导体的导线的微动疲劳。微动装置具有三个独立的致动器，允许在受控负载（或位移）下进行测试。因此，可以研究相关参数对微动疲劳过程的影响（例如法向力、切向力和体积力、磨损水平和磨损表面形态）。为了评估器件性能，在 6201 铝合金线材上进行了测试，考虑了两种不同的接触法向力 P。结果表明，对于大于 106 次循环的寿命，P 从 250 增加到 500 N 产生了显着降低与平滑线试样的测试相比，疲劳强度。