Abstract

Five group of different layering methods of basalt/carbon fiber (BF/CF) hybrid reinforced resin matrix composites are prepared by vacuum infiltration hot-press forming process. The bending properties with different layering methods have obvious distinguishing, B₅C₁ (B-Basalt fiber, C-Carbon fiber) has the lowest bending strength of 283 MPa, and B₁C₅ has the highest bending strength of 404 MPa. The observation of microstructure shows that infiltration effect of composites is good, and matrix is fully and evenly distributed in fibers. The bending fracture morphology is also relatively ideal. Some of the fibers show brittle fracture morphology and others show pull-out morphology, further indicating that the fibers are tightly bound to the matrix. In addition, the ultimate bending strength of composite single-layer plate is calculated, and the formula for calculating the bending strength of the composite laminate is established based on the laminate principle. By modifying the calculation formula, more accurate results are obtained. The experimental results are in good agreement with the theoretical ones, and the reliability of the calculation method is verified. The results showed that carbon fiber enhanced the bending strength of hybrid laminates, but with the increase of carbon fiber content, the strengthening effect decreased

摘要

采用真空渗透热压成型工艺制备了五组不同分层方式的玄武岩/碳纤维(BF/CF)杂化增强树脂基复合材料。不同分层方式的弯曲性能有明显区别，B ₅ C ₁（B-玄武岩纤维、C-碳纤维）弯曲强度最低，为283 MPa，B ₁ C ₅抗弯强度最高可达404兆帕。微观结构观察表明，复合材料的浸润效果良好，基体在纤维中充分均匀分布。弯曲断裂形貌也比较理想。一些纤维表现出脆性断裂形态，而另一些则表现出拔出形态，进一步表明纤维与基体紧密结合。此外，计算了复合单层板的极限抗弯强度，并根据层合原理建立了复合层合板抗弯强度的计算公式。通过修改计算公式，得到更准确的结果。实验结果与理论值吻合较好，验证了计算方法的可靠性。