铺层结构对碳纤维/环氧层压板火反应特性的影响

利用锥形量热仪，垂直/水平燃烧速度测试仪、极限氧指数测定仪研究了单向、织物两种铺层结构对碳纤维/环氧层压板火反应特性的影响。结果表明，随热辐射强度的增加，不同铺层结构碳纤维/环氧层压板的点燃时间均缩短，质量剩余率降低，热释放速率、产烟速率峰值均增加，达到峰值时间变短，总热释放量和总烟释放量增加；在相同热辐射强度下，相比于织物铺层结构，单向铺层结构的碳纤维/环氧层压板点燃时间较长，质量剩余率较高，热释放速率、产烟速率峰值较高，达到峰值时间提前，总热释放量和总烟释放量较低。此外，两种铺层结构中织物铺层结构的层压板火焰蔓延速度较慢，铺层结构对极限氧指数影响较小。

The influence of ply structure on fire behavior of carbon/epoxy laminate

The cone calorimeter, vertical/horizontal burning test and limiting oxygen index test were used to study the influence of unidirectional and woven fabric ply structures on the fire behavior of carbon/epoxy laminate. The results show that with the increase of heat flux, the ignition time of carbon/epoxy laminates with different ply structures decreased, the mass residual rate reduced, the peak value of heat release rate and smoke production rate, the total heat release and total smoke release increased, and the time to peak decreased. Under the same heat flux, compared with the woven fabric ply structure, the carbon/epoxy laminate of unidirectional ply structure has longer ignition time, higher mass residual rate, heat release rate and smoke production peak value. The time to peak is shorter, the total heat release and total smoke release are lower. Besides, the flame spread speed of the woven fabric ply structure laminate is slow, and the influence of ply structure on the limiting oxygen index is small.