Interlaminar mechanical properties of nano- and short-aramid fiber reinforced glass fiber-aluminum laminates: a comparative study
Interlaminar mechanical properties of nano- and short-aramid fiber reinforced glass fiber-aluminum laminates: a comparative study
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纳米和短芳纶纤维增强玻璃纤维-铝层压板的层间机械性能：比较研究
DOI：
10.1007/s10853-021-06003-z
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发表时间：
2021
影响因子：
4.5
通讯作者：
Ning Hu
中科院分区：
文献类型：
--
作者：
Xinyu Qi;Xiaopeng Wu;Youkun Gong;Huiming Ning;Feng Liu;Rui Zou;Shengbing Zhou;Zengrui Song;Chenxin Xiang;Ning Hu
脱层损伤限制了纤维金属层板的应用潜力，因此提高纤维金属层板的层间力学性能一直是该领域的研究热点和挑战。研究了两种填料的增韧效果，研究了纳米芳纶纤维（ANF）和短芳纶纤维（ASF）在玻璃纤维-铝合金层合板界面上的应用。为了保证纤维复合材料与金属板的良好结合，对铝合金表面进行了化学预处理。结果表明，在玻璃纤维-铝合金层合板的界面处使用两种填料可以同时提高层合板的I型和II型断裂韧性。由于ANF在环氧树脂基体中具有较好的分散性，因此ANF的增韧性能优于ASF。通过对断口形貌的电镜观察，揭示了层间增韧机理。同时，采用基于双线性粘结区模型的有限元分析方法，预测了复合材料层间拉伸和剪切强度的提高。
Delamination damages limit the application potential of Fiber metal laminates, hence improving the interlaminar mechanical properties has always been a research focus and challenge in this field. The toughening effect of two fillers, i.e., nano-aramid fibers (ANFs) and short-aramid fibers (ASFs), which are used at the interface of glass fiber-aluminum laminates, have been investigated. Chemical pretreatments of aluminum alloy surface were conducted to ensure the better adherence between the fiber composites and metal sheets. Results revealed that Mode-I and Mode-II fracture toughness of the laminates could be simultaneously improved when using the two fillers at the interface of glass fiber-aluminum laminates. Attributed to the better dispersion of ANFs in epoxy matrix, the toughening performance of ANFs is better than that of ASFs in this case. The mechanism of interlaminar toughening was revealed with electron microscopic observation of fracture morphology. Meanwhile, the finite element analysis based on bilinear cohesive zone model was adopted to predict the increased interlaminar tensile and shear strength.