Journal
MATERIALS & DESIGN
Volume 145, Issue -, Pages 226-231Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.matdes.2018.02.052
Keywords
Cellular material; Auxetic behavior; Poisson's ratio; Chirality
Categories
Funding
- United States National Science Foundation's Civil, Mechanical, and Manufacturing Innovation [1634560]
- Directorate For Engineering
- Div Of Civil, Mechanical, & Manufact Inn [1634560] Funding Source: National Science Foundation
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We constructed a new class of three-dimensional cellular metamaterials by connecting planar structure with anti-chiral topology. This was achieved by introducing a unique node design for connecting planar materials to enable constructing a three-dimensional architecture. This node design is based on linking the circular elements of the anti-chiral topology using oblique load-bearing ligaments. As the planar structure is subjected to loading, the circular elements rotate and the ligaments undergo bending, resulting in out-of-plane deformation of the three-dimensional cellularmetamaterials. The node design, and specifically the ligaments' revolution angle govern the behavior of cellular metamaterials. This was demonstrated by designing cellular metamaterials with a wide range of positive and negative Poisson's ratio in the out-of-plane direction. (C) 2018 Elsevier Ltd. All rights reserved.
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