Mechanical buckling of nanocomposite rectangular plate reinforced by aligned and straight single-walled carbon nanotubes
Mechanical buckling of nanocomposite rectangular plate reinforced by aligned and straight single-walled carbon nanotubes
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DOI：
10.1016/j.compositesb.2012.01.067
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发表时间：
2012-06
影响因子：
13.1
通讯作者：
S. J. Mehrabadi;B. Aragh;V. Khoshkhahesh;A. Taherpour
中科院分区：
文献类型：
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作者：
S. J. Mehrabadi;B. Aragh;V. Khoshkhahesh;A. Taherpour
研究了单壁碳纳米管（SWCNTs）增强的功能梯度纳米复合材料矩形板在单轴和双轴面内载荷作用下的屈曲行为。假设纳米复合板的材料性质在厚度方向上是渐变的，并且根据两种类型的对称碳纳米管体积分数分布连续且平滑地变化。单壁碳纳米管的材料性质是根据分子动力学（MD），然后在一个点的有效材料性质估计无论是Eshelby-Mori-Tanaka方法或扩展的混合规则。采用考虑一阶剪切变形（FSDT）效应的Mindlin板理论和变分法，推导了结构的平衡和稳定方程。与均匀分布的碳纳米管，这是在本研究中的一个特殊情况下，纳米复合板的结果进行了比较，与碳纳米管的体积分数的对称配置文件。通过数值模拟研究了不同类型的面内压缩载荷、碳纳米管体积分数、不同类型的碳纳米管体积分数分布、几何参数和不同类型的有效材料性质对功能梯度纳米复合材料板临界力学屈曲载荷的影响。
In this paper, the mechanical buckling of a functionally graded nanocomposite rectangular plate reinforced by aligned and straight single-walled carbon nanotubes (SWCNTs) subjected to uniaxial and biaxial in-plane loadings is investigated. The material properties of the nanocomposite plate are assumed to be graded in the thickness direction and vary continuously and smoothly according to two types of the symmetric carbon nanotubes volume fraction profiles. The material properties of SWCNT are determined according to molecular dynamics (MDs), and then the effective material properties at a point are estimated by either the Eshelby–Mori–Tanaka approach or the extended rule of mixture. The equilibrium and stability equations are derived using the Mindlin plate theory considering the first-order shear deformation (FSDT) effect and variational approach. The results for nanocomposite plate with uniformly distributed CNTs, which is a special case in the present study, are compared with those of the symmetric profiles of the CNTs volume fraction. A numerical study is performed to investigate the influences of the different types of compressive in-plane loadings, CNTs volume fractions, various types of CNTs volume fraction profiles, geometrical parameters and different types of estimation of effective material properties on the critical mechanical buckling load of functionally graded nanocomposite plates.