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Elastic response of a carbon nanotube fiber reinforced polymeric composite: A numerical and experimental study

机译:碳纳米管纤维增强聚合物复合材料的弹性响应:数值和实验研究

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摘要

Premature failure due to low mechanical properties in the transverse direction to the fiber constitutes a fundamental weakness of fiber reinforced polymeric composites. A solution to this problem is being addressed through the creation of nanoreinforced laminated composites where carbon nano-tubes are grown on the surface of fiber filaments to improve the matrix-dominated composite properties. The carbon nanotubes increase the effective diameter of the fiber and provide a larger interface area for the polymeric matrix to wet the fiber. A study was conducted to numerically predict the elastic properties of the nanoreinforced composites. A multiscale modeling approach and the Finite Element Method were used to evaluate the effective mechanical properties of the nanoreinforced laminated composite. The cohesive zone approach was used to model the interface between the nanotubes and the polymer matrix. The elastic properties of the nanoreinforced laminated composites including the elastic moduli, the shear modulus, and the Poisson's ratios were predicted and correlated with iso-strain and iso-stress models. An experimental program was also conducted to determine the elastic moduli of the nanoreinforced laminated composite and correlate them with the numerical values.
机译:由于在纤维横向上的低机械性能而导致的过早失效构成了纤维增强的聚合物复合材料的基本缺点。通过创建纳米增强层压复合材料来解决该问题,其中碳纳米管生长在纤维长丝的表面上,以改善基体为主的复合材料的性能。碳纳米管增加了纤维的有效直径,并为聚合物基质润湿纤维提供了更大的界面面积。进行了一项研究以数值预测纳米增强复合材料的弹性性能。多尺度建模方法和有限元方法被用来评估纳米增强层压复合材料的有效机械性能。内聚区方法用于模拟纳米管和聚合物基质之间的界面。预测了纳米增强层压复合材料的弹性性能,包括弹性模量,剪切模量和泊松比,并将其与等应变模型和等应力模型相关联。还进行了实验程序以确定纳米增强层压复合材料的弹性模量并将其与数值相关。

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