Carbon fiber are of great importance materials exploited in various industrial applications in the recent years. Because of its strong flexural and compressive properties, these fibers have been commonly utilized as a reinforcement for producing polymer composite laminates. Carbon fiber-reinforced polymer (CFRP) laminates are subjected to extreme forces and damaged. In the component assembly of the structures, one of the conventional damages that still occurs on the CFRP laminates is holes that is created on the specimen by drilling tools, which causes a reduction in the laminates’ mechanical strength. One of the suggested ways to strengthen the mechanical properties of composites is to add nanoparticles. Therefore, the impact of silica nanoparticles (nano-SiO₂) on the tensile, flexural, and compressive characteristics of the open-hole CFRP laminated composites is experimentally determined in this research. Nano-SiO₂ with various weight percentage of 0, 1, 2, 3, and 4 is added into the CFRP. A scanning electron microscope images are used to observe the microscopic structure of the composites. The results showed that adding 1–3 wt.% of nano-SiO₂ into the CFRP enhances the tensile, flexural, and compressive strength of the specimens and reduces the fiber pull out and delamination.

中文翻译：

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纳米SiO2对开孔碳纤维增强聚合物层状复合材料拉伸、弯曲和压缩特性的影响：实验研究


碳纤维是近年来在各种工业应用中开发的非常重要的材料。由于其强大的弯曲和压缩性能，这些纤维通常被用作生产聚合物复合材料层压板的增强材料。碳纤维增强聚合物 (CFRP) 层压板会受到极大的力而损坏。在结构的部件组装中，CFRP层压板上仍然发生的常规损坏之一是钻孔工具在样本上产生的孔，这会导致层压板的机械强度降低。增强复合材料机械性能的建议方法之一是添加纳米颗粒。因此，本研究通过实验确定了二氧化硅纳米颗粒（nano-SiO ₂ ）对开孔CFRP层状复合材料拉伸、弯曲和压缩特性的影响。 CFRP中添加了0、1、2、3、4等不同重量百分比的纳米SiO ₂ 。扫描电子显微镜图像用于观察复合材料的微观结构。结果表明，在 CFRP 中添加 1-3 wt.% 的纳米 SiO ₂ 可以提高试样的拉伸、弯曲和压缩强度，并减少纤维拉出和分层。