3D cellular metamaterials with planar anti-chiral topology

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Abstract

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 cellular metamaterials. 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.

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Ebrahimi, H., Mousanezhad, D., Nayeb-Hashemi, H., Norato, J., & Vaziri, A. (2018). 3D cellular metamaterials with planar anti-chiral topology. Materials and Design, 145, 226–231. https://doi.org/10.1016/j.matdes.2018.02.052

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