This study presents the results of an investigation on the tensile behaviour of hybrid polymer composites under different strain rates. Glass/carbon, aramid/carbon, glass/aramid, and glass/aramid/carbon hybrid laminates were produced using vacuum assisted resin transfer molding method with epoxy resin system. Uniaxial tensile testing was performed to determine the tensile strength, modulus and failure strain of the hybrid laminates under quasi static (0.001 s^‒1) and intermediate (5 and 10 s^‒1) strain rates. Tensile strength and elastic modulus of hybrid composites increased with increasing the strain rate. Hybrid laminates with glass fibre were more sensitive to the strain rate. Carbon layers located at the centre of the hybrid laminates resulted in increased tensile strength, indicating the major role of stacking sequence on the behaviour of hybrid composites. Scanning electron microscope (SEM) was used to examine the fracture surfaces of the laminates. The extent of damage propagation was significantly broader at intermediate strain rates.

本研究展示了对不同应变速率下混合聚合物复合材料的拉伸行为的研究结果。玻璃/碳、芳纶/碳、玻璃/芳纶和玻璃/芳纶/碳混合层压板使用环氧树脂体系的真空辅助树脂传递模塑方法生产。进行单轴拉伸试验以确定混合层压板在准静态（0.001 s ^‒1）和中间（5 和 10 s ^‒1）下的拉伸强度、模量和破坏应变) 应变率。混合复合材料的拉伸强度和弹性模量随着应变速率的增加而增加。带有玻璃纤维的混合层压板对应变率更敏感。位于混合层压板中心的碳层导致拉伸强度增加，表明堆叠顺序对混合复合材料的行为的主要作用。使用扫描电子显微镜 (SEM) 检查层压板的断裂表面。在中等应变率下，损伤传播的范围明显更广。