Microstructural design and experimental validation of elastic metamaterial plates with anisotropic mass density
نویسندگان
چکیده
R. Zhu,1 X. N. Liu,1 G. L. Huang,1,* H. H. Huang,2 and C. T. Sun3 1Department of Systems Engineering, University of Arkansas at Little Rock, Little Rock, Arkansas 72204, USA 2Department of Engineering Science and Ocean Engineering, National Taiwan University, Taipei 10617, Taiwan 3School of Aeronautics and Astronautics, Purdue University, West Lafayette, Indiana 47907, USA (Received 1 June 2012; revised manuscript received 7 September 2012; published 31 October 2012)
منابع مشابه
A single-phase elastic hyperbolic metamaterial with anisotropic mass density.
Wave propagation can be manipulated at a deep subwavelength scale through the locally resonant metamaterial that possesses unusual effective material properties. Hyperlens due to metamaterial's anomalous anisotropy can lead to superior-resolution imaging. In this paper, a single-phase elastic metamaterial with strongly anisotropic effective mass density has been designed. The proposed metamater...
متن کاملDesign and measurements of a broadband two-dimensional acoustic metamaterial with anisotropic effective mass density
We present the experimental realization and characterization of a broadband acoustic metamaterial with strongly anisotropic effective mass density. The metamaterial is composed of arrays of solid inclusions in an air background, and the anisotropy is controlled by the rotational asymmetry of these inclusions. Transmission and reflection measurements inside a one-dimensional waveguide are used t...
متن کاملMicrostructure continuum modeling of an elastic metamaterial
Elastic metamaterials have unusual microstructures that can make them exhibit unusual dynamic behavior. For instance, if treated as classical elastic solids, these materials may have frequency-dependent effective mass densities which may become negative in certain frequency range. In this study, an approach for developing microstructure continuummodels to represent elastic metamaterials was pre...
متن کاملEfficient Higher-Order Shear Deformation Theories for Instability Analysis of Plates Carrying a Mass Moving on an Elliptical Path
The dynamic performance of structures under traveling loads should be exactly analyzed to have a safe and reasonable structural design. Different higher-order shear deformation theories are proposed in this paper to analyze the dynamic stability of thick elastic plates carrying a moving mass. The displacement fields of different theories are chosen based upon variations along the thickness as c...
متن کاملA hybrid elastic metamaterial with negative mass density and tunable bending stiffness
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 ...
متن کامل