期刊
APPLIED PHYSICS LETTERS
卷 116, 期 2, 页码 -出版社
AMER INST PHYSICS
DOI: 10.1063/1.5132589
关键词
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资金
- National Nature Science Foundation of China [11890700, 51732006, 11625418, 11474158, 11890702, 51721001]
- National Key R&D Program of China [2018YFA0306200, 2017YFA0303702]
Auxetic metamaterials have received wide attention due to their idiosyncratic physical properties. In this paper, experiments and simulations were performed to study the mechanical and acoustic properties of a 3D anti-chiral auxetic metamaterial subjected to quasi-static loading. The results shows that Poisson's ratio of the designed metamaterial can be changed from -0.45 to 0.35 with different cell parameters. Acoustic tests show that the designed metamaterial provides an ultra-wide phononic bandgap and exhibits outstanding wave attenuation properties. By applying rational tensile/compression force, the bandgap is widened/narrowed, which indicates the tunability of the bandgap through deformation. Moreover, the bandgap tuning is through all high symmetry points in the Brillouin zone due to the iso-auxeticity of the metamaterial. This study provides a possible way for controlling the bandgap with the deformable metamaterial.
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