TY - CONF
T1 - Full paper – A hybrid elastic metamaterial with tunable bending stiffness
AU - Chen, Yangyang
AU - Hu, Gengkai
AU - Huang, Guoliang
N1 - Publisher Copyright:
© 2017 International Committee on Composite Materials. All rights reserved.
PY - 2017
Y1 - 2017
N2 - 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 metamaterial that possesses both a negative mass density as well as an extremely tunable stiffness by properly utilizing both the mechanical and electric elements. The tunable wave manipulation abilities are investigated and revealed in terms of both the effective negative mass density and/or bending stiffness of the hybrid metamaterial. The programmed flexural wave manipulations and broadband negative refraction are then illustrated through three-dimensional (3D) multi-physical numerical simulations in hybrid metamaterials. Our numerical results demonstrate that the flexural wave propagation can essentially be switched between “ON/OFF” states by connecting different shunting circuits.
AB - 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 metamaterial that possesses both a negative mass density as well as an extremely tunable stiffness by properly utilizing both the mechanical and electric elements. The tunable wave manipulation abilities are investigated and revealed in terms of both the effective negative mass density and/or bending stiffness of the hybrid metamaterial. The programmed flexural wave manipulations and broadband negative refraction are then illustrated through three-dimensional (3D) multi-physical numerical simulations in hybrid metamaterials. Our numerical results demonstrate that the flexural wave propagation can essentially be switched between “ON/OFF” states by connecting different shunting circuits.
KW - Elastic metamaterial
KW - Programmable wave control
KW - Tunable bending stiffness
UR - http://www.scopus.com/inward/record.url?scp=85053112551&partnerID=8YFLogxK
M3 - Paper
AN - SCOPUS:85053112551
T2 - 21st International Conference on Composite Materials, ICCM 2017
Y2 - 20 August 2017 through 25 August 2017
ER -