...Yanghao Fang; Tsampikos Kottos; Ramathasan Thevamaran We study the elastodynamics of a periodic metastructure incorporating a defect pair that enforces a parity-time (PT) symmetry due to judiciously engineered imaginary impedance elements—one having energy amplification (gain) and the other having...

...Jian Hua; Hongshuai Lei; Cun-Fa Gao; Daining Fang Multistable metastructure can be used as a reusable energy-absorbing structure which is usually accompanied by relatively low energy absorption capacity. In this work, a novel structure with variable cross-sectional width was designed to improve...

...Mingkai Zhang; Jinkyu Yang; Rui Zhu In this research, we aim to combine origami units with vibration-filtering metastructures. By employing the bistable origami structure as resonant unit cells, we propose metastructures with low-frequency vibration isolation ability. The geometrical nonlinearity...

... shells ( L = 60 mm, t = 1 mm, and b = 3 mm): ( a ) A = 4, ( b ) A = 6, ( c ) A = 8, and ( d ) A = 10 The geometric parameter ( Q ) and circumferential number ( A ) of unit cells have significant effects on the mechanical response of the multistable cylindrical metastructures. To find...