Effect of high mean tensile stress on the fretting fatigue life of an Ibis steel reinforced aluminium conductor |
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Affiliation: | 1. Kocaeli University, Mechanical Eng. Dept. Umuttepe, Kocaeli, Turkey;2. Kocaeli University, Ford Otosan Ihsaniye Vocational School of Automotive, Golcuk, Turkey;3. Kocaeli University, Metallurgical and Materials Eng. Dept. Umuttepe, Kocaeli, Turkey |
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Abstract: | The aim of this work is to evaluate the effect of a high mean tensile pre-load on the fatigue life of an Ibis type of steel reinforced aluminium conductor (ACSR) mounted on a monoarticulated cast aluminium suspension clamp. To carry out the tests a new and enhanced version of a fretting fatigue rig for overhead conductors was built. Based on the obtained S–N curves for this assembly it was shown that an increase of the Everyday stress (EDS) from 20% to 30% of the cable rated tensile strength (RTS) caused an average reduction of 50% in life. Failure analysis revealed that cracks always initiated at contact interfaces within the cable/clamp assembly, at the fretting marks. |
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