碳纤维复合芯铝导线以其高强度、低弧垂、低损耗等优点在电力传输中有着广泛应用。然而,实际工况下复合芯导线往往受到风振载荷、覆冰舞动等外力作用,由于复合芯属脆性材料,长期使用下存破坏失效隐患。本文对碳纤维复合芯在室温环境下的三点弯疲劳性能进行试验,研究碳纤维复合芯条件疲劳极限及碳纤维复合芯S-N曲线,以为评估碳纤维复合芯抗疲劳破坏性能提供试验依据。 Carbon fiber composite core aluminum wire with its high strength, low sag, low loss and other advantages in the power transmission has been widely used. However, the composite core wire under actual conditions is often subject to wind load, icing and other external forces, due to the composite core is a brittle material, under the long-term use of hidden failure damage failure. In this paper, the three-point fatigue behavior of carbon fiber composite core under room temperature was tested. The fatigue limit of carbon fiber composite core and the S-N curve of carbon fiber composite core were studied to provide experimental basis for evaluating the anti-fatigue failure performance of carbon fiber composite core.