Tunable magneto-granular phononic crystals
arXiv:1604.01973 · doi:10.1063/1.4947192
Abstract
This paper reports on the study of the dynamics of 1D magneto-granular phononic crystals composed of a chain of spherical steel beads inside a properly designed magnetic field. This field is induced by an array of permanent magnets, located in a holder at a given distance from the chain. The theoretical and experimental results of the band gap structure are displayed, including all six degrees of freedom for the beads, i.e. three translations and three rotations. Experimental evidence of transverse-rotational modes of propagation is pre- sented; moreover, by changing the strength of the magnetic field, the dynamic response of the granular chain is tuned. The combination of non-contact tunability with the potentially strong nonlinear behavior of gran- ular systems ensures the suitability of magneto-granular phononic crystals as nonlinear, tunable mechanical metamaterials for use in controlling elastic wave propagation.
References in corpus (6)
- Topological mechanics of gyroscopic metamaterials
- Discrete Breathers in One-Dimensional Diatomic Granular Crystals
- Generation of Sound Bullets with a Nonlinear Acoustic Lens
- Tunable Vibrational Band Gaps in One-Dimensional Diatomic Granular Crystals with Three-Particle Unit Cells
- Tunable magneto-granular phononic crystals
- Nonlinear Hysteretic Torsional Waves
Cited by in corpus (6)
- Nonlinear Coherent Structures in Granular Crystals
- Tunable magneto-granular phononic crystals
- Wave control through soft microstructural curling: bandgap shifting, reconfigurable anisotropy and switchable chirality
- Tunable, synchronized frequency down-conversion in magnetic lattices with defects
- Granular Graphene: direct observation of zigzag and armchair edge waves
- Analytical model of the acoustic response of nanogranular films adhering on a substrate