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首页> 外文期刊>International journal of mechanics and materials in design >Predicting mechanical properties of fuzzy fiber reinforced composites: radially grown carbon nanotubes on the carbon fiber
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Predicting mechanical properties of fuzzy fiber reinforced composites: radially grown carbon nanotubes on the carbon fiber

机译：预测模糊纤维增强复合材料的机械性能：在碳纤维上径向生长的碳纳米管

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摘要

It is intended to predict mechanical properties of fuzzy fiber reinforced polymer. An appropriate computational modeling is developed on the basis of bottom-up modeling covering all involved scales of nano, micro, meso and macro. The effective parameters of each scale are identified using top-down scanning approach and defining a representative volume element for each scale of analysis. At nano-scale, mechanical properties of isolated CNT are estimated. Then, at the upper scale of micro, the interaction between CNT and surrounding polymer is investigated considering non-bonded van der Waals interactions. Mechanical properties of the CNT/polymer nanocomposite with radial arrangement of CNT are derived at meso scale. Subsequently, mechanical properties of a single fuzzy fiber encompassing core carbon fiber and surrounding CNT/polymer are calculated. Finally, mechanical properties of the uni-directional and short fuzzy fiber reinforced composites are evaluated at the scale of macro. Treating CNT volume fraction and its arbitrary non-straight shapes as random parameters, developed modeling is conducted stochastically. The results imply on the importance of stochastic modeling, since deterministic modeling is led to a noticeable overestimation in predicted results. A very good agreement is reported between predicted results by stochastic modeling and published experimental data in literature.
机译：它旨在预测模糊纤维增强聚合物的机械性能。在自底向上建模的基础上开发了一种适当的计算模型，该模型涵盖了所有涉及的纳米，微观，中观和宏观尺度。使用自上而下的扫描方法并为每个分析比例定义一个代表性的体积元素，可以确定每个比例的有效参数。在纳米级，估计了分离的CNT的机械性能。然后，在微尺度上，考虑了非键范德华相互作用，研究了碳纳米管与周围聚合物之间的相互作用。 CNT径向排列的CNT /聚合物纳米复合材料的机械性能在中观尺度上得到。随后，计算了包含芯碳纤维和周围的CNT /聚合物的单根模糊纤维的机械性能。最后，以宏观尺度评估了单向和短型模糊纤维增强复合材料的力学性能。将CNT的体积分数及其任意非直线形作为随机参数，随机进行已开发的建模。结果表明随机建模的重要性，因为确定性建模会导致预测结果明显过高。据报道，随机建模的预测结果与文献中公布的实验数据之间有很好的一致性。

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