Synthetically non-Hermitian nonlinear wave-like behavior in a topological mechanical metamaterial.

ABSTRACT: Topological mechanical metamaterials have enabled new ways to control stress and deformation propagation. Exemplified by Maxwell lattices, they have been studied extensively using a linearized formalism. Herein, we study a two-dimensional topological Maxwell lattice by exploring its large deformation quasi-static response using geometric numerical simulations and experiments. We observe spatial nonlinear wave-like phenomena such as harmonic generation, localized domain switching, amplification-enhanced frequency conversion, and solitary waves. We further map our linearized, homogenized system to a non-Hermitian, nonreciprocal, one-dimensional wave equation, revealing an equivalence between the deformation fields of two-dimensional topological Maxwell lattices and nonlinear dynamical phenom

SUBMITTER: Xiu H 

PROVIDER: S-EPMC10161133 | biostudies-literature | 2023 May

REPOSITORIES: biostudies-literature