Effect of high mean tensile stress on the fretting fatigue life of an Ibis steel reinforced aluminium conductor

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• 作者：A.A. Fadel ^{aida.unb@gmail.com} ; D. Rosa ^{danielrosa@unb.br} ; L.B. Murç ; a ^{leobrantm@hotmail.com} ; J.L.A. Fereira ^jorge@unb.br ; J.A. Araú ; jo ; ^{alex07@unb.br}
• 关键词：Fretting fatigue ; Cable fatigue ; ACSR conductor ; Everyday stress
• 刊名：International Journal of Fatigue
• 出版年：2012
• 期刊代码：79_01421123
• 类别：et
• 出版时间：September, 2012
• 卷：42
• 期：Complete
• 页码：24-34
• 文件大小：1791 K

摘要

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.