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- W4288804530 abstract "We consider a previously experimentally realized discrete model that describes a mechanical metamaterial consisting of a chain of pairs of rigid units connected by flexible hinges. Upon analyzing the linear band structure of the model, we identify parameter regimes in which this system may possess discrete breather solutions with frequencies inside the gap between optical and acoustic dispersion bands. We compute numerically exact solutions of this type for several different parameter regimes and investigate their properties and stability. Our findings demonstrate that upon appropriate parameter tuning within experimentally tractable ranges, the system exhibits a plethora of discrete breathers, with multiple branches of solutions that feature period-doubling and symmetry-breaking bifurcations, in addition to other mechanisms of stability change such as saddle-center and Hamiltonian Hopf bifurcations. The relevant stability analysis is corroborated by direct numerical computations examining the dynamical properties of the system and paving the way for potential further experimental exploration of this rich nonlinear dynamical lattice setting." @default.
- W4288804530 created "2022-07-30" @default.
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- W4288804530 date "2022-07-28" @default.
- W4288804530 modified "2023-09-23" @default.
- W4288804530 title "Discrete breathers in a mechanical metamaterial" @default.
- W4288804530 doi "https://doi.org/10.48550/arxiv.2207.13968" @default.
- W4288804530 hasPublicationYear "2022" @default.
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