Research progress on fretting damage of the flexible multi-strand wire structure

LU Haowen; LI Yongjian; ZHANG Mingwei; WU Junpeng; LÜ Xiaowen; PENG Jinfang; XU Zhibiao

doi:10.16579/j.issn.1001.9669.2025.12.004

Abstract：The flexible multi-stranded wire structure is widely used in industrial fields such as bridges,buildings,coal mines,and power transmission due to its many advantages such as good flexibility,high reliability,and high strength.The service environment of the stranded wire structure is complex,and it is subjected to loads such as tension,torsion,bending,and multi-axis combined loads composed of them in a long time.The wind load,rain load,snow load,current,etc.they are subjected to can easily cause fretting damage between the stranded wire and the wire clamp,as well as between the stranded wire strands.The fretting damage of the multi-stranded wire structure usually manifests as an increased probability of broken wires and strand,leading to consequences such as increased losses in the stranded wire,decreased conductivity and shortened fatigue life.Severe fretting damage may even cause rapid fracture failure of the stranded wire.Aimed at the fretting damage of the flexible multi-strand wire structure in the engineering,firstly,the current research status at home and abroad was outlined,the damage form was clearly defined.Subsequently,the contact characteristic analysis was conducted,the influencing factors were summarized,the relevant test apparatus was listed,and then the prediction and protection strategies were introduced.Finally,an appropriate outlook was made aiming at the research progress in current of fretting damage of the flexible stranded wire structure.