Abstract Corrugated sandwich structures have been widely used in aerospace and aviation fields due to their excellent performances. In this paper, a new bio-inspired corrugated sandwich structure is designed based on the microstructure of cybister elytra. Moreover, the homogenization method is used to simplify models and the equivalent material parameters are derived by analytical formulation and finite element method (FEM). The mechanical properties of bio-inspired corrugated sandwich structures fabricated by selective laser melting (SLM) and equivalent models are also investigated subjected to bending loads by FEM and experiments. The results show that the bio-inspired corrugated sandwich structure can be equivalent to the orthotropic model better. Increasing the core height, thickness of the core and panel will improve the bending stiffness obviously. The simulation results are consistent with analytical formulation. But the experimental results are little greater due to the dimension deviation between the fabrication and design. Moreover, the equivalent calculation has a much higher accuracy with a relative deviation less than 10%.

中文翻译：

---

弯曲载荷作用下仿生波纹夹层结构的等效模型及力学性能

摘要 波纹夹层结构以其优异的性能在航天、航空领域得到广泛应用。在本文中，基于cybister elytra的微观结构设计了一种新型仿生波纹夹层结构。此外，采用均质化方法简化模型，并通过解析公式和有限元法（FEM）推导出等效材料参数。还通过有限元法和实验研究了由选择性激光熔化 (SLM) 和等效模型制造的仿生波纹夹层结构的机械性能在弯曲载荷下。结果表明，仿生波纹夹层结构可以更好地等效正交各向异性模型。增加核心高度，芯材和面板的厚度会明显提高弯曲刚度。模拟结果与分析公式一致。但由于制造和设计之间的尺寸偏差，实验结果略大。此外，等效计算具有更高的精度，相对偏差小于 10%。