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Keywords = double-cone arm

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11 pages, 5950 KiB  
Article
Elastic Metamaterials of Hexagonal Unit Cells with Double-Cone Arms from Pentamode to Band Gap at Low Frequencies
by Qi Li and Mingquan Zhang
Crystals 2022, 12(5), 604; https://doi.org/10.3390/cryst12050604 - 25 Apr 2022
Cited by 5 | Viewed by 2160
Abstract
Metamaterials are artificial materials with properties that can be designed by man-made structures. Pentamode metamaterials only support compressional stresses at specific frequency ranges, and a band gap is a frequency range where no stresses are supported. In this paper, an elastic metamaterial with [...] Read more.
Metamaterials are artificial materials with properties that can be designed by man-made structures. Pentamode metamaterials only support compressional stresses at specific frequency ranges, and a band gap is a frequency range where no stresses are supported. In this paper, an elastic metamaterial with hexagonal unit cells is studied where pentamode bands or band gaps at low frequencies are obtained by varying the inner structures. The effects of structural and geometric parameters on the band width of pentamode bands or band gaps are analyzed. Simulations of materials composed of primitive cells with pentamode or band gap properties are conducted with harmonic stimulation based on the finite element method. The metamaterials can be applied as pentamode metamaterials or vibration isolation materials. Full article
(This article belongs to the Special Issue Advances in Phononic Crystals and Elastic Metamaterials)
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