混杂纤维复合材料热膨胀性能及混杂效应的研究

STUDY ON THE THERMAL EXPANSION PERFORMANCE AND HYBRID EFFECT OF HYBRID COMPOSITES

通过力学和热性能实验分析了混杂复合材料的混杂结构、混杂方式及界面状态与热膨胀性能的关系。给出了混杂复合材料混杂效应系数的估算公式 ,并进行了实验验证。分析了热效应对混杂效应的影响。发现层间和夹心混杂复合材料的热膨胀量随炭纤维相对含量的增加而减少 ;经过表面处理后的纤维层间混杂复合材料的热膨胀量明显大于未处理的混杂复合材料。

The relationship between thermal expansion performance and hybrid structure, hybrid type and interface status of hybrid composites is analyzed with experiments. An estimated formula for the coefficient of hybrid effect of hybrid composites is presented, and validated by experiments. The influence of the thermal effect on the hybrid effect is analyzed. The value of the thermal expansion of interlaminar and sandwich hybrid composites decreases with increasing carbon fiber content. The value of the thermal expansivity of interlaminar hybrid composites with surface modification is larger than for that without modification.