The use of composite structures is ever-increasing due to the need of lightweight materials, and the combination of different reinforcements in a single matrix expands even further the range of processing and final characteristics compared to the use of a single-fiber type. This work investigates the effect of hybridization on in-plane permeability and mechanical properties of R-glass/aramid/epoxy composites manufactured by vacuum infusion. Five different fiber layups were studied, pure aramid, pure R-glass and three hybrids. The inclusion of R-glass fabrics increased permeability compared to aramid, and a synergistic effect was identified, i.e., one of the hybrids presented higher values than both single-fiber stacks. Inclusion of R-glass fabrics leads to greater strength and stiffness in tensile and flexural tests. The hybrids reached an increase of up to 50% in tensile modulus, and also higher compressive, flexural and short-beam strengths. In all, the results have shown that hybridization or aramid composites with R-glass may lead to enhanced processability by vacuum infusion and allow a range of improved mechanical properties, being an alternative in expanding the range of applications for rigid aramid composites.

由于需要轻巧的材料，复合结构的使用正在不断增加，并且与单纤维类型的使用相比，单个基体中不同增强材料的组合甚至进一步扩大了加工范围和最终特性。这项工作研究了杂化对真空灌注生产的R-玻璃/芳纶/环氧树脂复合材料的面内渗透性和机械性能的影响。研究了五种不同的纤维铺层，纯芳纶，纯R玻璃和三种混合纤维。与芳族聚酰胺相比，R玻璃纤维织物的渗透性增加，并且发现了协同作用，即，其中一种杂化纤维的价值高于两个单纤维堆叠。包含R玻璃纤维织物可在拉伸和弯曲测试中带来更大的强度和刚度。混合材料的拉伸模量提高了多达50％，并且压缩，弯曲和短梁强度也更高。总之，结果表明，与R-玻璃的杂化或芳族聚酰胺复合材料可通过真空灌注提高加工性能，并允许一系列改善的机械性能，是扩大刚性芳族聚酰胺复合材料应用范围的替代方法。