A comparative study of elastic properties and mode I fracture energy has been presented between conventional carbon fibre (CF)/epoxy and advanced carbon nanotube (CNT)/epoxy laminated composite materials. The volume fraction of CNT fibres has been considered as 15%, 30%, and 60% whereas; the volume fraction of CF has been kept constant at 60%. Three stacking sequences of the laminates viz.[0/0/0/0], [0/90/0/90] and [0/30/–30/90] have been considered in the present analysis. Periodic microstructure model has been used to calculate the elastic properties of the laminated composites. It has been observed analytically that the addition of only 15% CNT in epoxy will give almost the same value of longitudinal Young’s modulus as compared to the addition of 60% CF in epoxy. Finite element (FE) analysis of double cantilever beam specimens made from laminated composite has also been performed. It has been observed from FE analysis that the addition of 15% CNT in epoxy will also give almost the same value of mode I fracture energy as compared to the addition of 60% CF in epoxy. The value of mode I fracture energy for [0/0/0/0] laminated composite is two times higher than the other two types of laminated composites.

中文翻译：

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碳纳米管/环氧树脂和碳纤维/环氧树脂层压复合材料的弹性和I型断裂能的比较研究

常规碳纤维（CF）/环氧树脂和高级碳纳米管（CNT）/环氧层压复合材料之间已经进行了弹性性能和I型断裂能的比较研究。CNT纤维的体积分数被认为是15％，30％和60％，而；CF的体积分数保持恒定在60％。在本分析中考虑了层压板的三个堆叠顺序，即[0/0/0/0]，[0/90/0/90]和[0/30 / –30 / 90]。周期性的微观结构模型已经用于计算层压复合材料的弹性性能。从分析上已经观察到，与在环氧树脂中添加60％CF相比，在环氧树脂中仅添加15％CNT将获得几乎相同的纵向杨氏模量值。还对层压复合材料制成的双悬臂梁试样进行了有限元分析。从有限元分析中已经观察到，与在环氧树脂中添加60％CF相比，在环氧树脂中添加15％CNT也将提供几乎相同的I型断裂能值。[0/0/0/0]层压复合材料的模式I断裂能值是其他两种层压复合材料的两倍。