Non-reciprocal wave propagation in modulated elastic metamaterials.
Hussein Nassar,Hui Chen,Andrew N. Norris,Michael R. Haberman,Guoliang Huang +4 more
TLDR
Modulated metamaterials, which exhibit either non-reciprocal behaviours or non-standard effective mass operators, offer promise for applications in the field of elastic wave control in general and in one-way conversion/amplification in particular.Abstract:
Time-reversal symmetry for elastic wave propagation breaks down in a resonant mass-in-mass lattice whose inner-stiffness is weakly modulated in space and in time in a wave-like fashion. Specifically, one-way wave transmission, conversion and amplification as well as unidirectional wave blocking are demonstrated analytically through an asymptotic analysis based on coupled mode theory and numerically thanks to a series of simulations in harmonic and transient regimes. High-amplitude modulations are then explored in the homogenization limit where a non-standard effective mass operator is recovered and shown to take negative values over unusually large frequency bands. These modulated metamaterials, which exhibit either non-reciprocal behaviours or non-standard effective mass operators, offer promise for applications in the field of elastic wave control in general and in one-way conversion/amplification in particular.read more
Citations
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Tunable and Active Phononic Crystals and Metamaterials
TL;DR: In this article, a survey of tunable and active phononic crystals and metamaterials is presented, including bandgap and bandgap engineering, anomalous behaviors of wave propagation, as well as tunable manipulation of waves based on different regulation mechanisms: tunable mechanical reconfiguration and materials with multifield coupling.
Journal ArticleDOI
Nonreciprocity in acoustic and elastic materials
Hussein Nassar,Behrooz Yousefzadeh,Romain Fleury,Massimo Ruzzene,Andrea Alù,Chiara Daraio,Andrew N. Norris,Guoliang Huang,Michael R. Haberman +8 more
TL;DR: In this article, the authors review how reciprocity breaks down in materials with momentum bias, structured space-dependent and time-dependent constitutive properties, and constitutive nonlinearity, and report on recent advances in the modelling and fabrication of these materials, as well as on experiments demonstrating nonreciprocal acoustic and elastic wave propagation therein.
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Observation of Nonreciprocal Wave Propagation in a Dynamic Phononic Lattice
TL;DR: Nonreciprocity in dynamic one-dimensional phononic crystal systems like the one presented here offer opportunities to create phononic diodes that can serve for rectification applications.
Journal ArticleDOI
A programmable metasurface for real time control of broadband elastic rays
TL;DR: In this article, a programmable elastic metasurface with sensing-and-actuating units, allowing to adapt and reprogram its wave control functionalities in real time, is presented.
Journal ArticleDOI
Nonreciprocal Wave Propagation in a Continuum-Based Metamaterial with Space-Time Modulated Resonators
TL;DR: In this paper, an elastic metamaterial with coupling stiffness modulated in space and in time by programmably pumping ac currents into coils was introduced, which theoretically and experimentally demonstrates tunable, non-reciprocal propagation of flexural waves on a continuum.
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