期刊
JOURNAL OF THE MECHANICS AND PHYSICS OF SOLIDS
卷 105, 期 -, 页码 179-198出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.jmps.2017.05.009
关键词
Elastic metamaterial; Tunable bending stiffness; Programmable wave control
资金
- Air Force Office of Scientific Research [AF 9550-15-1-0016]
- National Science Foundation of China [11632003]
Achieving vibration and/or wave attenuation with locally resonant metamaterials has attracted a great deal of attention due to their frequency dependent negative effective mass density. Moreover, adaptive phononic crystals with shunted piezoelectric patches have also demonstrated a tunable wave attenuation mechanism by controlling electric circuits to achieve a negative effective stiffness. In this paper, we propose an adaptive hybrid meta-material that possesses both a negative mass density as well as an extremely tunable stiffness by properly utilizing both the mechanical and electric elements. A multi-physical analytical model is first developed to investigate and reveal the tunable wave manipulation abilities in terms of both the effective negative mass density and/or bending stiffness of the hybrid metamaterial. The programmed flexural wave manipulations, broad-band negative refraction and waveguiding are then illustrated through three-dimensional (3D) multi-physical numerical simulations in hybrid metamaterial plates. Our numerical results demonstrate that the flexural wave propagation can essentially be switched between ON/OFF states by connecting different shunting circuits. (C) 2017 Elsevier Ltd. 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