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- Title
Modeling and analysis of gradient metamaterials for broad fusion bandgaps.
- Authors
Cai, Changqi; Zhu, Chenjie; Zhang, Fengyi; Sun, Jiaojiao; Wang, Kai; Yan, Bo; Zhou, Jiaxi
- Abstract
A gradient metamaterial with varying-stiffness local resonators is proposed to open the multiple bandgaps and further form a broad fusion bandgap. First, three local resonators with linearly increasing stiffness are periodically attached to the spring-mass chain to construct the gradient metamaterial. The dispersion relation is then derived based on Bloch's theorem to reveal the fusion bandgap theoretically. The dynamic characteristic of the finite spring-mass chain is investigated to validate the fusion of multiple bandgaps. Finally, the effects of the design parameters on multiple bandgaps are discussed. The results show that the metamaterial with a non-uniform stiffness gradient pattern is capable of opening a broad fusion bandgap and effectively attenuating the longitudinal waves within a broad frequency region.
- Subjects
LONGITUDINAL waves; DISPERSION relations; METAMATERIALS; RESONATORS
- Publication
Applied Mathematics & Mechanics, 2024, Vol 45, Issue 7, p1155
- ISSN
0253-4827
- Publication type
Article
- DOI
10.1007/s10483-024-3154-6