环境载荷对碳纤维电热复合材料电热性能的影响

 考查了碳纤维电热复合材料在通电加热和力学载荷下的电热性能。结果表明,碳纤维电热复合材料的电阻值随温度的升高成线性减小关系,但其变化范围较小;拉伸或弯曲载荷下的变形,碳纤维电热复合材料的电阻值均随着形变量的增加而增大,但环境载荷对2 种载荷的影响有所区别。其中,电阻值随拉伸载荷的增大成线性增大关系,但在初始加载和即将拉断时电阻会有较大波动;对于弯曲载荷,初始加载时电阻值并没有发生明显变化,当加载达到某一临界值时,电阻值随弯曲载荷的增大成线性增大关系。

Effect of enviroment loading on the electric properties of carbon fabric

This paper investigates the properties of carbon fabric in ohmic heating and mechanical loads. The results show that the resistance of carbon fabric decreases basically linearly with the increase of temperature; but the variation range is small. For deformations caused by either tensile load or compressive load, the resistance of carbon fabric will increase with the increase of deformation, but the effects of these two loads are different. That is, the resistance increases linearly with the increase of tensile load, but there is great volatility in the initial loading and before tensile failure. For the bending load, the resistance has no significant change in the initial loading; but when the load reaches a critical value, the resistance increases linearly with the increase of the bending load.