碳纳米管特性的不确定性导致的功能分级板挠度变化

Alda Carvalho, Ana Martins, Ana F. Mota, M.A.R. Loja
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引用次数: 0

摘要

碳纳米管作为加固材料被广泛应用于各个工程领域。由于碳纳米管对提高材料的平均特性具有重要作用,因此评估碳纳米管材料和几何特性的变化对结构响应的影响非常重要。本研究考虑了由单壁或多壁碳增强的铝连续相构成的功能分级板。纳米管重量分数在厚度上的变化导致了板材的功能梯度。在模拟板材样品时,考虑到只有纳米管的材料和几何特性会受到不确定性的影响。根据建立的多元回归模型得出的结果,我们可以得出结论:纳米管的长度对板材的最大横向位移没有影响,而碳纳米管的重量分数演变、其内部和外部直径以及杨氏模量则相反。所开发的多元回归模型可用作本研究领域内的替代预测工具。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Variability on Functionally Graded Plates’ Deflection Due to Uncertainty on Carbon Nanotubes’ Properties
Carbon nanotubes are widely used as material reinforcement in diverse fields of engineering. Being that their contribution is significant to improving the mean properties of the resulting materials, it is important to assess the influence of the variability on carbon nanotubes’ material and geometrical properties to structures’ responses. This work considers functionally graded plates constituted by an aluminum continuous phase reinforced with single-walled or multi-walled carbon. The nanotubes' weight fraction evolution through the thickness is responsible for the plates’ functional gradient. The plates’ samples are simulated considering that only the nanotubes’ material and geometrical characteristics are affected by uncertainty. The results obtained from the multiple regression models developed allow us to conclude that the length of the nanotubes has no impact on the maximum transverse displacement of the plates in opposition to the carbon nanotubes’ weight fraction evolution, their internal and external diameters, and the Young’s modulus. The multiple regression models developed can be used as alternative prediction tools within the domain of the study.
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