Fibre Volume Fraction and Impact Strength Analysis of Reinforced Polyester Composites

D. D. Olodu, Osagie Ihenyen
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Abstract

Improper fibre volume analyses in most reinforced composites poses great challenges in polymer industries which results to the production of composites with low mechanical strength. This study investigates the fibre volume fraction and impact strength analysis of reinforced polyester composites. In this study, E-Glass fibres (hard and soft mat) were mixed with polyester at different composition by volume. The E-glass serves as reinforcement to the polyester, fourteen test specimens of the reinforced composites were developed with each of them having dimension of 210mm length, 150mm width and 50mm thickness respectively. The properties of the developed reinforced composites such as volume fraction, impact energy, and impact strength were analysed from the values obtained from compact tension and Charpy impact test respectively. The results obtained shows that the effective thickness of the developed reinforced composites ranged from 60mm to 100mm at fibre fraction which ranges from 0.32 to 0.50. The results obtained also shows that the specimens containing woven roving have greater resistance to fracture and impact damages due to high fibre volume fraction. Hence, the laminates impact strength is a function of its fibre volume fraction.
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增强聚酯复合材料的纤维体积分数和冲击强度分析
大多数增强复合材料的纤维体积分析不正确,给聚合物工业生产低机械强度的复合材料带来了巨大的挑战。对增强聚酯复合材料的纤维体积分数和冲击强度进行了研究。在这项研究中,E-Glass纤维(硬垫和软垫)以不同的体积组成与聚酯混合。采用e -玻璃对聚酯进行增强,制作了14个增强复合材料试件,试件尺寸分别为长210mm、宽150mm、厚50mm。根据压实拉伸试验和夏比冲击试验的结果,分析了所研制的增强复合材料的体积分数、冲击能和冲击强度。结果表明:在纤维掺量为0.32 ~ 0.50的情况下,所研制的增强复合材料的有效厚度为60mm ~ 100mm;结果还表明,含粗纱的试样由于纤维体积分数高,具有较好的抗断裂和抗冲击损伤性能。因此,层合板的冲击强度是其纤维体积分数的函数。
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