2014/03/05 by Luca Bonanomi, Bonanomi, Luca, Georgios Theocharis +3
Engineering · Physics and Astronomy · #Acoustic Wave Phenomena Research #Advanced Fiber Laser Technologies #FOS: Physical sciences #Materials Science (cond-mat.mtrl-sci) #Nonlinear Photonic Systems #Optics (physics.optics) #cond-mat.mtrl-sci #physics.optics
paper · pdf · doi:10.48550/arxiv.1403.1052
arxiv created 2014/03/05 · openalex publication_date 2014/03/05 · arxiv updated 2014/03/06 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
We report the design and testing of a tunable and nonlinear mechanical metamaterial, called locally resonant granular chain. It consists of a one-dimensional array of hollow spherical particles in contact, containing local resonators. The resonant particles are made of an aluminium outer spherical shell and a steel inner mass connected by a polymeric plastic structure acting as a spring. We characterize the linear spectra of the individual particles and of one-dimensional arrays of particles using theory, numerical analysis, and experiments. A wide band gap is observed as well as tunability of the dispersive spectrum by changing the applied static load. Finally, we experimentally explore the nonlinear dynamics of the resonant particles. By using nonlinear acoustical techniques, we reveal a complex, nonclassical nonlinear dynamics.