蛋壳夹芯结构的变形机制及力学性能

Distortion mechanism and mechanics performance of eggshell-like gore structure

从结构仿生的观点出发,提出了"孔壳夹芯结构"模型,通过模拟样件试验,归纳出了"孔壳夹芯结构"的压缩变形机制,得出"蛋壳夹芯结构"的承载能力主要取决于"蛋壳"的材料、结构尺寸和排列角度等因素的结论.应用薄壳理论,算出了"蛋壳"单元在承受均布压力情况下的屈曲临界压力,同时,对"蛋壳"单元建立有限元模型,进行了静力学和屈曲模态分析,为进一步的"蛋壳夹芯结构"的工程轻量化设计提供了理论依据.

From the point of structure biomimetic, the model of eggshell-like thin core structure was put forward. From the test of model, the press distortion mechanism was concluded and the carrying capacity of egg-like thin shell core structure was depended on material, size and form angle. Applying thin shell theory, buckling critical load of eggshell-like under action of press load was counted out. In addition, limit element unit model was built up and mechanism and buckling mode were analyzed. The theory basis for weight reduction design was provided in engineering in future.