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首页> 外文期刊>Materials science & engineering >Analysis of microstructure characteristics and mechanical properties of beetle forewings, Allomyrina dichotoma
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Analysis of microstructure characteristics and mechanical properties of beetle forewings, Allomyrina dichotoma

机译：甲虫（Allomyrina dichotoma）甲虫前爪的微观结构特征和力学性能分析

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摘要

In this study, the internal microstructure of the forewings of Allomyrina dichotoma is investigated by scanning electron microscopy (SEM) analysis. The results of SEM test show that the inner microstructure of the forewings possesses an integrated sandwich-like plate supported by trabeculae, which is composed of upper and lower skins of unequal thicknesses, and a honeycomb core with trabeculae. Beetle forewing is a natural composite material composed of chitin fibres and proteins. Also, based on the micro dimensions of the forewings observed by SEM, two groups of micro finite element (FE) models of the forewings (i.e., core with trabeculae and core without trabeculae) are established to compare and comprehensively understand the effect of trabeculae on the mechanical properties of the forewings. The FE simulation results demonstrate that the trabeculae could effectively (1) improve the stress state on the upper skin, lower skin, and core layer of the forewings, (2) improve the overall bending stiffness of the forewings, (3) enhance the peeling resistance between the skins and core layer, and (4) improve the buckling strength of the thin-walled core layer. The unique forewing structure of the Allomyrina dichotoma can provide an excellent bionic model for optimizing the traditional honeycomb panel structure.
机译：在这项研究中，通过扫描电子显微镜（SEM）分析调查了双孢异丝藻前爪的内部显微结构。扫描电镜测试结果表明，前爪的内部微观结构具有由小梁支撑的整体三明治状板，该板由厚度不等的上，下蒙皮和带小梁的蜂窝状芯组成。甲虫前爪是由几丁质纤维和蛋白质组成的天然复合材料。此外，根据扫描电镜观察到的前爪的微观尺寸，建立了两组前爪的微有限元（FE）模型（即，具有小梁的核心和没有小梁的核心），以比较和全面了解小梁对骨的影响。前爪的机械性能。有限元模拟结果表明，小梁可以有效地（1）改善前叉上皮，下皮和核心层的应力状态，（2）改善前叉的整体弯曲刚度，（3）增强剥离力表皮与芯层之间的抗性，以及（4）提高了薄壁芯层的屈曲强度。拟南芥的独特前翅结构可为优化传统蜂窝板结构提供出色的仿生模型。

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