碳纤维增强镁基复合材料(C_f/AZ91D)层压板杨氏模量的多尺度模拟及预测（英文）  

Multi-scale Modeling of Carbon Fiber Reinforced Magnesium Laminates (C_f/AZ91D) for Young’s Modulus Prediction

作　　者：周计明[1] 孟海明 李大利 齐乐华[1] 鞠录岩[1] Zhou Jiming;Meng Haiming;Li Dali;Qi Lehua;Ju Luyan(Northwestern Polytechnical University, Xi'an 710072, China)

机构地区：[1]西北工业大学

出　　处：《稀有金属材料与工程》2019年第7期2068-2073,共6页Rare Metal Materials and Engineering

基　　金：National Natural Science Foundation of China(51575447);Top International University Visiting Program for outstanding Young Scholars of Northwestern Polytechnical University(4500-16GH0304);Seed Foundation of Innovation and Creation for Graduate Students in Northwestern Polytechnical University(ZZ2018082)

摘　　要：根据碳纤维增强镁基复合材料层压板的真实微观结构特点建立了其多尺度微观力学模型,包括微观尺度下的横向及纵向单胞模型以及介观尺度的结构单胞模型。宏观力学性能弹性模量根据介观模型进行计算。介观模型中用到的性能参数通过微观模型计算获得。采用多尺度建模方法预测了不同铺层模式的碳纤维增强镁基复合材料层压板弹性模量,并采用对应的实验方法进行了验证。结果表明,多尺度建模方法可以用于不同铺层方式层压复合材料弹性模量的预测,与实验结果具有相同的变化趋势,但较实验结果偏大。这主要是由于模拟过程中忽略了实验中真实存在的合金、纤维性能退化及界面结合问题而造成的。本文所提出的多尺度建模方法对于复合材料层压板设计具有重要意义。Multi-scale models for carbon fiber reinforced magnesium laminate were established according to the characteristics of its realistic microstructure, including the crosswise and lengthwise unit cell model in microscale and structural unit cell model in mesoscale. The macro mechanical property Young’s modulus was predicted according to the mesoscale model. The required properties for mesoscale model during simulation were obtained from microscale simulation. The Young’s modulus for C_f/AZ91D laminates in different layup modes was predicted by multi-scale modeling technique and verified by corresponding experiments. The results show that multi-scale models can be used to predict the Young’s modulus of laminate composites in different layup modes, and they show the same trend as but larger values than the experimental results. It is caused by the assumption of no degradation for matrix alloy and fiber during fabrication and perfect interface bonding. The multi-scale modeling technique proposed in this paper is meaningful for the laminate composite design.

关 键 词：多尺度建模 层压复合材料 镁基复合材料 杨氏模量 

分 类 号：TB33[一般工业技术—材料科学与工程]