This study used scanning electron microscopy (SEM) to observe the internal structure of forewings from adult male Allomyrina dichotoma. The images showed that the Allomyrina dichotoma forewing is a composite sandwich structure composed of upper and lower stressed skins, a hollow core layer and an abdominal-wall layer. The core layer has an irregular honeycomb-like structure with columellae; the chitin fibers on the surfaces of these columellae are connected to the upper and lower stressed skins. The structure of corrugated steel web (CSW) bridges is similar to that of a beetle forewing: the top and bottom concrete plates are similar to the upper and lower stressed skins, whereas the CSWs are similar to the irregular thin-walled core layers. In engineering applications, CSWs are prone to buckling. However, beetle forewings have a lightweight, high-strength composite structure that can adapt to complex, variable natural environments and external loads without breaking due to the reinforced columellae inside the structure. Hence, this work studied the microstructure of beetle forewing in an attempt to design a CSW with a columellar structure similar to that found in the core layer of the forewing. Moreover, a finite element model was used to quantitatively analyze the effects of the columellae on the deformation, shear stress distribution and buckling stability of CSW bridges, which can provide a reference for the bionic structure of a beetle forewing and for the optimization of CSW bridges.

这项研究使用扫描电子显微镜（SEM）来观察成年雄性拟龙（Allomyrina dichotoma）前爪的内部结构。图像显示拟南芥前突是由上下应力蒙皮，中空芯层和腹壁层组成的复合夹心结构。芯层具有不规则的蜂窝状蜂窝状结构。这些小肠表面上的几丁质纤维连接到上，下压力皮肤。波纹钢腹板（CSW）桥的结构类似于甲虫前屈的结构：顶部和底部的混凝土板类似于上，下应力蒙皮，而CSW的结构类似于不规则的薄壁芯层。在工程应用中，CSW容易弯曲。但是，甲虫的前爪具有轻巧，高强度的复合结构，可以适应复杂，可变的自然环境和外部载荷，而不会由于结构内部的加强柱而破裂。因此，这项工作研究了甲虫前爪的微观结构，以期设计出具有类似于前爪核心层中的小柱状结构的CSW。此外，利用有限元模型定量分析了小柱对CSW桥变形，剪切应力分布和屈曲稳定性的影响，可为甲壳动物前肢的仿生结构和CSW桥的优化提供参考。 。