Effect of anisotropy on phononic band structure and figure of merit of pentamode metamaterials

Authors:
Publisher website
Google Scholar
Abstract
We propose herein four types of anisotropic pentamode metamaterials (PMs) created by shifting the thin-end contention points along the space-diagonal, x-axis, y-axis, and z-axis directions. The phononic band structure and figure of merit (FOM) of the four types of anisotropic PMs are systematically investigated by using the finite-element method. Compared with isotropic PMs, the first phononic bandgaps appear in low-frequency regions, and the FOM increases by a factor of 6.9 when the thin-end connection area shifts along the z-axis direction. This study investigates how anisotropy affects PM properties and provides a reference to design acoustic cloaks, acoustic waveguides, and acoustic barriers.
Funding Information
  • Key Scientific Research Project of Henan Education Department (20A140008&#xFF0C, 15A120007 and 20A510004)
  • Key Laboratory of Grain Information Processing and Control of Ministry of Education (KFJJ-2019-105)
  • High-level Talent Fund of Henan University of Technology (31401120)
  • Basic Scientific Research Special Fund of Henan University of Technology (2015RCJH18)

This publication has 24 references indexed in Scilit: