玄武岩纤维-碳纤维混杂平纹织物增强环氧树脂基复合材料的制备与力学性能
Preparation and mechanical property of carbon-basalt hybrid fiber plain fabric reinforced epoxy resin matrix composites

对以平纹织物为增强体的混杂纤维复合材料（HFRP）的刚度和强度进行研究。设计热压工艺并制备7组具有不同混杂比的玄武岩纤维-碳纤维（玄-碳）混杂增强环氧树脂基复合材料试样进行拉伸试验。基于平纹织物的结构特征，对传统混合定律加以修正，提出以平纹织物为增强体的HFRP刚度估算模型。基于HFRP层合板的破坏机制，提出材料仅发生一次破坏的临界混杂比，并分成三个混杂比范围给出强度估算模型。最终以体现分散度的混杂效应系数对估算结果加以修正。结果表明：计算值与试验值近似，预估模型计算所得临界混杂比与试样拉伸试验时的应力-应变曲线分析结果相符，模型可为今后的实际应用提供理论依据。本文提出的预估方法可以反应混杂比和分散度对平纹织物为增强体的HFRP强度和刚度的影响，扩展了混合定律的应用范围。 The stiffness and strength of hybrid fiber reinforced polymer(HFRP) with plain fabric as reinforcement were studied. The hot-pressing process was designed and 7 groups of carbon-basalt hybrid fiber reinforced epoxy resin matrix composites specimens with different hybrid ratios were prepared for tensile test. Based on the structural characteristics of plain fabric, the traditional hybrid law was modified and a HFRP stiffness estimation model using plain fabric as reinforcement was proposed. According to the failure mechanism of HFRP laminates, the critical hybrid ratio of materials with only one failure was proposed and a strength estimation model with three ranges of hybrid ratios was also given. Finally, the estimation results were corrected by the coefficient of hybrid effect which reflects dispersion. The result shows that the calculated values and experimental values are similar and the critical hybrid ratio calculated fits the result of stress-strain curve analysis. The model can provide a theoretical basis for practical application in the future. The prediction method proposed in this paper can reflect the influence of hybrid ratio on the HFRP strength and stiffness of plain fabric, and expands the range of application of the mixture law. 吉林省“双十”工程项目—科技成果转化项目（3D515AI92416）；吉林大学大学生创新创业训练计划（2016A43127）