In this research, the thermoelastic response of unidirectional carbon fiber (CF)-reinforced polymer hybrid composites containing carbon nanotubes (CNTs) are analyzed using a physics-based hierarchical micromechanical modeling approach. The developed model consists of a unit cell-based scheme along with the Eshelby method which can consider random orientation, random distribution, directional behavior, non-straight shape of CNTs and interphase region generated due to the non-bonded van der Waals interaction between a CNT and the polymer matrix. The predictions are compared with the experimental data available in the literature and a quite good agreement is pointed out for the fibrous polymer composite, CNT-polymer nanocomposite and fiber/CNT-polymer hybrid composite systems. The influences of several factors, including volume fraction, aspect ratio, off-axis angle and arrangement type of CFs as well as CNT volume fraction on the thermoelastic behavior of CF/CNT-polymer hybrid composites are examined in detail. The results indicate that the transverse CTE of a unidirectional CF-reinforced composite is significantly improved due to the addition of CNTs, while the hybrid composite CTE in the longitudinal direction is negligibly affected by the CNTs. Also, it is found that the role of CNT in the hybrid composite thermoelastic behavior becomes more prominent as the CF aspect ratio decreases.

在这项研究中，使用基于物理的分层微机械建模方法分析了包含碳纳米管（CNT）的单向碳纤维（CF）增强的聚合物杂化复合材料的热弹性响应。所开发的模型包括基于单位单元的方案以及Eshelby方法，该方法可以考虑随机取向，随机分布，方向行为，CNT的非直线形状以及由于碳纳米管之间的未键合范德华相互作用而产生的相间区域。 CNT和聚合物基质。将该预测结果与文献中提供的实验数据进行了比较，并指出了纤维聚合物复合材料，CNT-聚合物纳米复合材料和纤维/ CNT-聚合物杂化复合材料系统的良好协议。几个因素的影响，包括体积分数，长宽比，详细研究了CFs的偏心角和排列类型以及CNT体积分数对CF / CNT-聚合物杂化复合材料热弹性行为的影响。结果表明，单向CF增强复合材料的横向CTE由于添加了CNT而得到了显着改善，而纵向混合杂化CTE受CNT的影响可忽略不计。而且，发现随着CF长宽比的降低，CNT在杂化复合材料热弹性行为中的作用变得更加突出。碳纳米管对纵向混合杂化CTE的影响可忽略不计。而且，发现随着CF长宽比的降低，CNT在杂化复合材料热弹性行为中的作用变得更加突出。碳纳米管对纵向混合杂化CTE的影响可忽略不计。而且，发现随着CF长宽比的降低，CNT在杂化复合材料热弹性行为中的作用变得更加突出。