摘要
为了确定碳纤维复合芯导线(正交各向异性复合材料)在架线压接施工过程中合理的压接载荷范围,研究该复合材料的径向力学性能,确保架空导线在电网中的安全稳定运行。使用ANSYS软件以1∶1的比例建立了Ф7.5mm的碳纤维复合芯棒的各向异性材料模型与耐张线夹的三维有限元模型,利用Tsai-Wu失效准则判定复合芯棒失效行为,同时考虑了复合芯棒与外层铝绞线、耐张线夹之间的接触与摩擦行为,对复合芯棒的压接施工过程进行了非线性静力学有限元分析。结果表明:在碳纤维复合芯导线压接施工过程中,单模压力如果小于24MPa,则芯棒易从金具腔中拉脱;如果压力大于28MPa,则复合芯易被压碎;但是复合芯在金具靠近楔形夹一侧由于应力集中更容易压损,该侧压力应相对较小,在21MPa^23MPa为宜。
In order to study the compression failure and contact friction behavior of carbon fiber composite core conductors (Orthotropic material) during the pressure connection construction, and to ensure the safe and stable operation of overhead conductors with carbon fiber composite mandrel in the power grid, ANSYS software is used in a ratio of 1 ∶1 established the three-dimensional finite element model of Ф7.5 mm carbon fiber composite core rod and strain clamp. Tsai-Wu failure criterion is used to determine the failure behavior of composite mandrel,considering the contact and friction behavior between composite mandrel, outer aluminium conductor and strain clamp connector. The nonlinear static finite element analysis of the splicing process of composite mandrel was carried out. The results show that the core is easy to be pulled out of the metal cavities if the single-mode pressure is less than 24 MPa, and the core is easy to be crushed if the pressure is greater than 28 MPa. However, the composite core is easy to stress concentration on the side of the metal fitting near the wedge clamp, resulting in pressure loss. The side pressure should be relatively small, preferably in the range of 21 MPa^23 MPa.
作者
朱院院
张晓敏
龙鹏
蒋渝
ZHU Yuan-yuan;ZHANG Xiao-min;LONG Peng;JIANG Yu(School of Materials Science and Engineering, Sichuan University, Chengdu 610000, China;High-tech Branch of Sichuan Shuneng Electric Power Company, Chengdu 610072, China;State Grid Sichuan Electric Power Company Supplies Company, Chengdu 610000, China)
出处
《玻璃钢／复合材料》
CAS
北大核心
2019年第8期29-34,共6页
Fiber Reinforced Plastics/Composites
基金
国家自然科学基金项目(51471155)
