ABSTRACT

Today, there is a new trend to substitute sustainable raw materials instead of unsustainable ones in many production-based industries. Natural fiber-reinforced composites have a low resistance to applied loads and chemical effects compared to synthetic fiber-reinforced composites. For this reason, researchers have aimed to increase the strength of natural fiber-reinforced composites with a variety of applications. In this study, the fracture toughness of jute/epoxy laminated composites, which were filled with silicon carbide (SiC) particles, were investigated. In this context, natural jute/epoxy laminated composites were filled in different ratios (3%, 6%, and 9%) with SiC particles having different granule sizes (4.5 μm, 9.3 μm, and 53 μm). Fracture toughness of filled and unfilled natural jute/epoxy composites in the loading state of Mod I, Mod I/II and Mode II were investigated by using the Arcan test apparatus. Also, the fracture behavior of filled and unfilled jute/epoxy laminated composites was analyzed by using the Finite Element Method (FEM). It was found that the analysis results were compatible with experimental results. The test results showed that the fracture toughness of SiC filled jute/epoxy laminated composites was higher than that of pure jute/epoxy composites. Also, the fracture toughness of the natural composite material varies according to the filling percentage and granule size.

摘要

今天，在许多以生产为基础的行业中，有一种新的趋势是用可持续的原材料代替不可持续的原材料。与合成纤维增强复合材料相比，天然纤维增强复合材料对施加载荷和化学效应的抵抗力较低。出于这个原因，研究人员的目标是提高具有多种应用的天然纤维增强复合材料的强度。在这项研究中，研究了填充有碳化硅 (SiC) 颗粒的黄麻/环氧树脂层压复合材料的断裂韧性。在这种情况下，天然黄麻/环氧树脂层压复合材料以不同的比例（3%、6% 和 9%）填充不同粒径（4.5 μm、9.3 μm 和 53 μm）的 SiC 颗粒。Mod I加载状态下填充和未填充天然黄麻/环氧树脂复合材料的断裂韧性，使用 Arcan 测试仪对 Mod I/II 和 Mode II 进行了研究。此外，使用有限元法（FEM）分析了填充和未填充黄麻/环氧树脂层压复合材料的断裂行为。发现分析结果与实验结果相符。试验结果表明，SiC填充黄麻/环氧树脂层压复合材料的断裂韧性高于纯黄麻/环氧树脂复合材料。此外，天然复合材料的断裂韧性根据填充百分比和颗粒尺寸而变化。试验结果表明，SiC填充黄麻/环氧树脂层压复合材料的断裂韧性高于纯黄麻/环氧树脂复合材料。此外，天然复合材料的断裂韧性根据填充百分比和颗粒尺寸而变化。试验结果表明，SiC填充黄麻/环氧树脂层压复合材料的断裂韧性高于纯黄麻/环氧树脂复合材料。此外，天然复合材料的断裂韧性根据填充百分比和颗粒尺寸而变化。