This study addressed to determine the flexural properties of hybrid composite laminates (HCAFRE) under the strain rate sensitivity. The hybrid composite laminate was formed as consecutive stacking of a sequence of plain woven carbon fiber reinforced epoxy (CFRE) and a plain-woven aramid fiber reinforced epoxy (AFRE) laminates. The flexural tests were carried out at four different strain rates (0.01, 0.11, 0.55, 1.1 s⁻¹) to determine the strain rate sensitivity of the HCAFRE. Moreover, the strain rate sensitivity of CFRE and AFRE was also determined individually. The effect of different fiber orientations (0°, 45°, and 90°) on the flexural properties of the composite laminates were also investigated at the scope of this study. In numerical analysis, composite laminates (CFRE, AFRE, and HCAFRE) were constituted in LS-DYNA finite element program using the Cowper-Symonds material model (MAT 112) which includes strain rate dependency. Consequently, it was seen that the experimental and numerical results were indicated a similar tendency to each other. Therefore, it was understood that the Cowper-Symonds material model is suited for the flexural behavior model of composite laminates under different strain rates.

本研究旨在确定混合复合材料层压板 (HCAFRE) 在应变率敏感性下的弯曲性能。混合复合层压板由一系列平纹编织碳纤维增强环氧树脂 (CFRE) 和平纹编织芳纶纤维增强环氧树脂 (AFRE) 叠层连续堆叠而成。弯曲试验在四种不同的应变率（0.01、0.11、0.55、1.1 s ^-1) 来确定 HCAFRE 的应变率敏感性。此外，CFRE 和 AFRE 的应变率敏感性也是单独确定的。本研究还研究了不同纤维取向（0°、45° 和 90°）对复合材料层压板弯曲性能的影响。在数值分析中，复合材料层压板（CFRE、AFRE 和 HCAFRE）在 LS-DYNA 有限元程序中使用 Cowper-Symonds 材料模型 (MAT 112) 构成，其中包括应变率相关性。因此，可以看出实验和数值结果显示出彼此相似的趋势。因此，据了解，Cowper-Symonds 材料模型适用于复合材料层压板在不同应变率下的弯曲行为模型。