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Direction-selective non-reciprocal mechanical energy splitter.

Anar Rakhimzhanova1,2, Michele Brun1

  • 1Department of Mechanical, Chemical and Materials Engineering, University of Cagliari, Cagliari 09123, Italy.

Philosophical Transactions. Series A, Mathematical, Physical, and Engineering Sciences
|October 9, 2022
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Summary

This study introduces a novel micro-structured medium capable of non-reciprocal wave deviation. This tunable system exhibits distinct wave propagation regimes, offering new possibilities for wave control.

Keywords:
energy flowgyroscopic latticemicro-structured elastic mediumnon-reciprocitysolitary wave

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Area of Science:

  • * Physics and Materials Science
  • * Wave Phenomena and Metamaterials

Background:

  • * Development of advanced materials for controlled wave manipulation.
  • * Need for non-reciprocal wave transmission in elastic media.

Purpose of the Study:

  • * To propose and analyze a direction-selective elastic micro-structured medium.
  • * To investigate tunable, non-reciprocal wave deviation using a lattice model.

Main Methods:

  • * Utilizing a lattice model incorporating constitutive nonlinearity, threshold activation, and gyroscopic effects.
  • * Quantifying direction-selectivity via energy flux analysis concerning gyricity and wave velocity.
  • * Numerical and analytical approximations to describe solitary wave behavior.

Main Results:

  • * Identification of three distinct wave propagation regimes: passing, highly directive, and barrier.
  • * Demonstration of tunable wave deviation in a specific direction.
  • * Confirmation that solitary waves are uniquely determined by propagation velocity.

Conclusions:

  • * The proposed micro-structured medium enables full non-reciprocal wave control.
  • * The gyroscopic effect is key to achieving direction-selective wave propagation.
  • * The findings contribute to the understanding of wave generation and transmission in complex media.