Reconfigurable and Superwide Bandgaps in Hexagon Bistable Miura-Origami Metamaterials with Multiple Embedded Resonators

Vibration suppression or vibration attenuation has always been a challenge in multiple engineering fields. In recent years, elastic metamaterials have emerged as an effective solution for wave manipulation, yet there are still various limitations for practical applications, including large weight, difficulties in achieving low-frequency performance, and the lack of tunability after fabrication. Inspired by traditional Chinese origami art, an innovative design is proposed for creating lightweight and reconfigurable elastic metamaterials. The Miura-ori pattern offers lightweight properties, while its bistable variant enables reconfigurability. Additionally, multiple embedded resonators create subwavelength bandgaps. Through a comprehensive finite element analysis, the dispersion relationship of different unitcells is characterized, revealing that the design can not only shift bandgaps to lower frequencies but also increase their bandwidth. The transmission spectra are measured through a comprehensive vibration response analysis of the supercell, which indicates the effective attenuation and the perfect attenuation width. Combining distinct unitcells with complementary bandgaps, the hybrid-supercells achieve significant performance enhancement in both effective and perfect attenuation bandwidth. This work demonstrates a novel approach for creating superwide and subwavelength configurable bandgaps without adding significant mass, remarkably developing the practical application of elastic metamaterials for vibration isolation. © World Scientific Publishing Company.