温度影响下碳纤维导线分层力学特性有限元分析

Finite Element Analysis on Layered Mechanical Properties of Carbon Fiber Wires Under Influence of Temperature

为探明温度对碳纤维导线分层力学特性的影响,考虑拐点温度,利用电热模块施加不同电压得到多种温度,并计算分析不同温度和拉断力条件下碳纤维导线的各层、各股和各截面应力应变分布.研究结果表明:拐点温度后,碳芯受到正向应力但铝绞线承受负向应力,使碳纤维导线失去了承担拉断力的作用;各股线的最大应力和应变均出现在线的两端,倒角位置的应力和应变结果略大于对应股线主体上的应力;碳纤维导线各个截面的最大应力均为正值,均出现在碳芯上,其靠近外力施加端截面的最大应力出现突然下降的现象;碳纤维导线更适用于各种温度条件,但应注意导线两端夹持位置和梯形截面中小截面的力学特性变化.

In order to clarify the effect of temperature on the layered mechanical properties of carbon fiber wires,while the critical temperature is considered,the gravitational strain distributions of each wire layer,strand and section in the breaking force conditions are calculated at temperatures driven by different voltages of an electric heating.The results show that,above the critical temperature,the carbon core is subjected to positive stress and the aluminum strand to a negative stress,making the wire unable to bear the breaking force.The maximum stress and strain of each strand appear at both ends of the wire,and the stress and strain at the chamfer position are slightly larger than the stress on the main body of the strand.The maximum stress at each wire cross-section is positive and occurs at the core,and near the end where the force acts it drops sharply.Carbon fiber wires are more suitable for various temperatures,but the changes in the mechanical characteristics at the clamping position at wire ends and at the small and medium trapezoidal sections need more exploration.