Elastic Metamaterials of Hexagonal Unit Cells with Double-Cone Arms from Pentamode to Band Gap at Low Frequencies

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 wi...

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Bibliographic Details
Published in:Crystals (Basel) 2022-05, Vol.12 (5), p.604
Main Authors: Li, Qi, Zhang, Mingquan
Format: Article
Language:English
Subjects:
band gap
Banded structure
double-cone arm
Energy gap
Finite element analysis
Finite element method
Frequency ranges
hexagonal unit cell
Low frequencies
Metamaterials
pentamode metamaterials
Software
Stresses
Vibration analysis
vibration isolation
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Summary: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.
ISSN:2073-4352
2073-4352
DOI:10.3390/cryst12050604