In-plane Elasticity of Beetle Elytra Inspired Sandwich Cores
In-plane Elasticity of Beetle Elytra Inspired Sandwich Cores
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DOI：
10.1016/j.compstruct.2022.116155
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发表时间：
2022-08
影响因子：
6.3
通讯作者：
Xindi Yu;Qicheng Zhang;Athina Kontopoulou;G. Allegri;M. Schenk;F. Scarpa
中科院分区：
文献类型：
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作者：
Xindi Yu;Qicheng Zhang;Athina Kontopoulou;G. Allegri;M. Schenk;F. Scarpa
Beetle Elytron Plate（BEP）是一种新型的仿生夹层结构，具有优异的抗压强度、能量吸收能力和弯曲性能。这些特性使得BEPs适合作为夹层板中传统蜂窝芯的潜在替代品。这项工作首次描述了参数BEP拓扑的平面内工程弹性常数的行为。甲虫elytron核心配置模拟使用有限元模型，包括全尺寸模型和代表性的单位细胞与周期性边界条件的渐近均匀化。该模型还基准从ASTM拉伸试验相关的面内杨氏模量，泊松比和剪切模量的实验结果。然后使用基准模型对蜂窝结构的几何特征进行参数分析。研究结果为进一步研究BEP结构提供了坚实的基础，并将其应用于更广泛的工程领域。
The Beetle Elytron Plate (BEP) is a new class of biomimetic sandwich core that features excellent compressive strength, energy absorption capacity and flexural properties. These characteristics make BEPs suitable as potential replacements of classical honeycomb cores in sandwich panels. This work describes the behaviour of the in-plane engineering elastic constants of parametric BEP topologies for the first time. The beetle elytron cores configurations are simulated using Finite Element models, including full-scale models and representative unit cells with periodic boundary conditions for asymptotic homogenization. The models are also benchmarked against experimental results obtained from ASTM tensile tests related to the in-plane Young’s modulus, Poisson’s ratio and shear modulus. The benchmarked models are then used to perform a parametric analysis against the geometry characteristics of the cellular configurations. Results obtained from this work will provide a solid foundation for further research on BEP structures and expand their applications into wider engineering fields.