Three-dimensional single-phase elastic metamaterial for low-frequency and broadband vibration mitigation

Elastic metamaterials with local resonance bandgaps are promising for low-frequency vibration mitigation. However, such locally resonant metamaterials inherently possess narrow bandgap width, and are usually achieved by multi-material structures, which are difficult to fabricate, limiting their potential in engineering practice. Here, we present a class of 3D single-phase elastic metamaterials exhibiting both locally resonant and Bragg...