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本文针对碳纤维复合材料点阵结构,从结构设计、制备工艺、平压性能、剪切性能等方面对其进行试验表征及理论模型研究.设计四种成型碳纤维复合材料金字塔点阵结构的思想,并采用一种新的制备工艺即预浸料二次成型工艺制备试样,试验结果表明,该工艺能最大程度发挥纤维增强潜力.通过实验揭示在平压载荷下杆件屈曲、杆件断裂、杆件分层脱胶失效机理,在剪切载荷下杆件屈曲、杆件分层、杆件脱胶失效机理,基于结构力学基础原理,建立相应理论模型,经过修正之后的理论模型均能较好预报典型载荷下力学性能.本文研究发现碳纤维复合材料金字塔点阵结构具有密度低、比强度大、比刚度高等优点,且芯子中具有大量空间,可以制备轻质多功能结构.
In this paper, the lattice structure of carbon fiber composite materials, from the structural design, preparation technology, flat pressure performance, shear properties of its experimental characterization and theoretical model of the design of four kinds of carbon fiber composite pyramid lattice structure of the idea and A new preparation process, prepreg secondary molding process, was used to prepare samples. The experimental results show that the process can maximize the potential of fiber reinforcement. The buckling of bar, The mechanism of delamination delamination failure, the buckling of rod under shear load, the delamination of rod member and the failure mechanism of rod degumming. Based on the basic mechanics of structure mechanics, the corresponding theoretical model is established. After the modification, the theoretical model can predict the typical Mechanical properties under load.In this paper, the pyramid lattice structure of carbon fiber composite material has the advantages of low density, high specific strength and high specific stiffness, and has a lot of space in the core to prepare a lightweight multifunctional structure.