期刊
PHYSICS LETTERS A
卷 384, 期 35, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.physleta.2020.126892
关键词
3D syndiotactic metastructure; Single-phase structure; Ultra-low frequency; Broadband
资金
- National Natural Science Foundation of China [516750402, 12002258]
- Natural Science Foundation of Shaanxi Province [2020JQ043]
- National Science and Technology Major Project [2019ZX06004001]
- China Postdoctoral Science Foundation [2018M643623, 20190084]
The artificially periodic structures with the bandgap (BG) features provide a fantastic way for elastic wave manipulation. However, omnidirectional control of elastic waves at low-frequency remains a challenge, especially in the engineering application, due to the great different material parameters of the structure's components. In this work, we present the design of a three-dimensional syndiotactic metastructure (STM) and isotactic metastructure (ITM) composed of a single material with the same density and stiffness. A low-frequency broad bandgap occurs in the global band structure of STM. Meanwhile, it also retains the same high-frequency ultra-wide BG as that of ITM. The formation of the low-frequency BG of STM is attributed to the simultaneous activation of rotation and translation modes. The static deformation analysis indicates that STM has a unique translational and rotational coupling mechanism. The frequency response results reveal that the coupling mechanism can also enhance the attenuation of high-frequency BG. (C) 2020 Elsevier B.V. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据