期刊
COMPOSITES PART B-ENGINEERING
卷 110, 期 -, 页码 72-82出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.compositesb.2016.11.011
关键词
Negative Poisson's ratio; Honeycomb; Cellular structure; Auxetic; Morphing
资金
- National Natural Science Foundation of China [11225211]
- MORPHELLE [FP7-AAT.2012.6.3-1-341509]
This work presents a novel negative Poisson's ratio honeycomb design composed by two parts (a reentrant hexagonal component and a thin plate part) that provide separate contributions to the in plane and out-of-plane mechanical properties. The re-entrant hexagons provide the in-plane negative Poisson's ratio, the in-plane compliance and the out-of-plane compressive strength, while the thin plate part connecting the re-entrant hexagonal section bears the large out-of-plane flexibility. This paper focuses on the in-plane mechanical properties of the auxetic cellular structure. Theoretical models related to the in-plane uniaxial tensile modulus, the shear modulus, and the Poisson's ratios have been built and validated using the finite element techniques. The in-plane behavior of the honeycomb has also been investigated against the geometrical parameters of the unit cell using a parametrical analysis. The theoretical and numerical models illustrate good agreement and show the potential of its application in morphing structures. We also provide a benchmark of the auxetic configuration proposed in this work against negative Poisson's ratio topologies from open literature. (C) 2016 Elsevier Ltd. All rights reserved.
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