The study of mechanical and dynamic characteristics of composite materials is important. Vibration is one of the major problems faced because of the uncertainty and the disturbances due to its surroundings. For composite being used in the structures like aircraft, automobiles, railway coaches and buildings it should have sound mechanical and dynamic characteristics. Many researchers have been interested in the natural fiber based composite materials for solving problems such as environmental sustainability while also having good mechanical properties. In this paper, our objective is to explore the use of the short fiber and studied the dynamic and mechanical characteristics of banana-epoxy; kenaf-epoxy and hemp-epoxy natural fiber reinforced composite materials. The use of short fibers in the composites makes it easy to process and thus reduces the production cost when compared to composites which are made from long fiber mat. All composites which are fabricated have shown enhancement in the mechanical strength when the fiber loading in the composite is increased. It is concluded that the composite samples prepared from kenaf, banana and hemp shows better damping characteristics when compares to the neat epoxy material. It is also found that the hemp fiber based composite has shown the highest tensile strength and kenaf fiber based composite has shown the highest damping properties.

中文翻译：

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天然短纤维增强复合材料动态特性的实验研究

研究复合材料的力学和动力学特性具有重要意义。由于周围环境的不确定性和干扰，振动是面临的主要问题之一。对于用于飞机、汽车、铁路客车和建筑物等结构的复合材料，它应该具有良好的机械和动态特性。许多研究人员一直对天然纤维基复合材料感兴趣，以解决环境可持续性等问题，同时还具有良好的机械性能。在本文中，我们的目的是探索短纤维的用途，研究香蕉环氧树脂的动态和力学特性；洋麻环氧树脂和麻环氧树脂天然纤维增强复合材料。与由长纤维毡制成的复合材料相比，在复合材料中使用短纤维使其易于加工，从而降低了生产成本。当复合材料中的纤维负载增加时，所有制造的复合材料都显示出机械强度的提高。得出的结论是，与纯环氧树脂材料相比，由洋麻、香蕉和大麻制备的复合样品具有更好的阻尼特性。还发现基于大麻纤维的复合材料显示出最高的拉伸强度，而基于红麻纤维的复合材料显示出最高的阻尼性能。得出的结论是，与纯环氧树脂材料相比，由洋麻、香蕉和大麻制备的复合样品具有更好的阻尼特性。还发现基于大麻纤维的复合材料显示出最高的拉伸强度，而基于红麻纤维的复合材料显示出最高的阻尼性能。得出的结论是，与纯环氧树脂材料相比，由洋麻、香蕉和大麻制备的复合样品具有更好的阻尼特性。还发现基于大麻纤维的复合材料显示出最高的拉伸强度，而基于红麻纤维的复合材料显示出最高的阻尼性能。