中文摘要：

采用传统制备技术制造的碳纳米管增强金属基复合材料中,团聚是一种常见的现象,团聚将减弱碳纳米管的强化效果。为了量化团聚对金属基复合材料整体力学行为的影响,构建了一种由纯基体区域和包含团聚碳纳米管区域组成的复合材料模型。采用分级方法结合晶体塑性理论分析了碳纳米管团聚对金属基复合材料弹性和塑性力学行为的影响。结果表明：团聚可以明显降低碳纳米管增强效果,且这种影响与增强相的尺寸相关。此外,计算结果与实验数据对比验证了分级方法的可行性。

英文摘要：

The agglomeration of carbon nanotube （CNT） was a common phenomenon in CNT-reinforced metal matrix composites （MMCs） fabricated by the traditional techniques.The presence of agglomeration would weaken the strengthening effect of the reinforcement.To quantity the role of agglomeration on overall mechanical response of MMCs, a composite structure model consisting of pure metal matrix and the containing agglomerated CNT regions was established. A hierarchical approach combined with crystal plasticity analysis was developed to model the impact of agglomeration on the elastic and plastic responses of CNT/metal composites. Results showed that the agglomeration could obviously decrease the strengthening effect of the reinforcement, and the effect was related to the size （aspect ratio） of CNT. Compared with some available experimental results, the applicability of the proposed scheme was proved.