碳纳米管和碳纤维增强的多级/多尺度复合材料力学性能研究

项目名称： 碳纳米管和碳纤维增强的多级/多尺度复合材料力学性能研究

项目编号： No.11472027

项目类型： 面上项目

立项/批准年度： 2015

项目学科： 数理科学和化学

项目作者： 陈玉丽

作者单位： 北京航空航天大学

项目金额： 92万元

中文摘要： 碳纤维复合材料是重要的航空航天结构材料，采用碳纳米管对其进行改性是提高其性能的新思路，代表了未来轻质、高强、多功能的结构功能一体化复合材料的发展方向。然而，由于碳纳米管/碳纤维多级复合材料具有复杂微观结构和多级尺度跨度，研究大多集中在材料制备方面的尝试，尚缺乏理论的指导和系统的宏观性能实验研究。为了通过细微观多级结构设计使碳纳米管在与纤维的协同作用中最大限度地发挥其优异力学性能，本项目将针对碳纳米管改性基体、碳纳米管改性纤维、碳纳米管同时改性基体和纤维、碳纳米管层间增韧四型多级复合材料，发展多尺度细观力学模型、建立有效的多级/多尺度计算方法定量研究各种微观特征影响下该材料的力学行为，并开展实验系统地研究各因素对其宏观力学性能的影响。通过理论、计算和实验之间的不断反馈，实现该材料的微观结构优化，从而给出对宏观碳纳米管/碳纤维复合材料设计和制备的指导性建议，加速我国功能结构复合材料的研发进程。

中文关键词： 碳纤维复合材料；碳纳米管；细观力学；力学性能；多级分析

英文摘要： Carbon fiber (CF) reinforced composites are important structural materials in aerospace industries. Modifying CF composites by carbon nanotubes (CNTs) is a recent new method to improve mechanical and physical properties of CF composites, and thus represents the development direction of future light, strong and multifunctional composites with combined structural and functional performance. However, due to the complicated microstructure and multiple scale of CNT and CF reinforced hierarchical/multiscale composites, so far most studies are focused on preparation methods, without theoretical guidance or systematic experiments on their macromechanical properties. In order to fully utilize the excellent properties of CNTs in CNT/CF hierarchical composites through the meso-micro structure design, this project will develop a multiscale mesomechanics theory and multi-level/multi-scale simulation method for four types of CNT/CF hierarchical composites, i.e. carbon fiber reinforced composites with CNTs (1) modifying the fiber, (2) modifying the matrix, (3) modifying the fiber and matrix simultaneously and (4) modifying the interface between laminates, to investigate the mechanical properties and behaviors of the composites under the influences of different microscopic characteristic parameters quantitatively. Moreover, systematic experiments will also be carried out to study the influence factors on the macromechanical properties of the the CNT/CF hierarchical composites. Through feedbacks between the theories, simulations and experiments, the optimal microstructure design of the CNT/CF hierarchical composites will be made, and the guiding advice on design and preparation of CNT/CF hierarchical composite laminates can be provided, which will have significant meanings for the development and application of light, strong and multifunctional composites.

英文关键词： Carbon fiber reinforced composites;Carbon nanotubes;Mesomechanics;Mechanical properties;Multilevel analysis