Journal
COMPOSITE STRUCTURES
Volume 300, Issue -, Pages -Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.compstruct.2022.116155
Keywords
In-plane elastic engineering constants; Beetle elytron; Biomimetic sandwich structure; Honeycomb structure; Representative volume element; Periodic boundary conditions
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Funding
- Faculty of Engineering of the University of Bristol
- China Scholarship Council
- NEUROMETA [ERC-2020-AdG 101020715]
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This study presents the behavior of the in-plane engineering elastic constants of beetle elytron plate (BEP) topologies and validates the models with simulations and experimental results. The obtained results will serve as a solid foundation for further research and application of BEP structures.
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 po-tential 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.
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