title: Wave propagation in granular chains with local resonances.
abstract: We study wave propagation in a chain of spherical particles containing a local resonator. The resonant particles are made of an aluminum outer spherical shell and a steel inner mass connected by a polymeric plastic structure acting as a spring. We characterize the dynamic response of individual particles and the transmitted linear spectra of a chain of particles in contact. A wide band gap is observed both in theoretical and experimental results. We show the ability to tune the acoustic transmission by varying the contact interaction between particles. Higher driving amplitude leads to the generation of nonlinearities both in the response of a single particle and that of the whole chain. For a single resonant particle, we observe experimentally a resonant frequency downshift, which follows a complex nonlinear behavior. In the chain of particles, nonlinearity leads to the generation of nonlinear harmonics and the presence of localized modes inside the band gap.
authors: Department of Mechanical and Process Engineering, Swiss Federal Institute of Technology (ETH), Zürich 8092, Switzerland.
authors: Luca
authors: L
authors: Bonanomi
authors: Graduate Aerospace Laboratories (GALCIT), California Institute of Technology, Pasadena, California 91125, USA.|LAUM, CNRS, Université du Maine, Avenue O. Messiaen, 72085 Le Mans, France.
authors: Georgios
authors: G
authors: Theocharis
authors: Department of Mechanical and Process Engineering, Swiss Federal Institute of Technology (ETH), Zürich 8092, Switzerland.|Graduate Aerospace Laboratories (GALCIT), California Institute of Technology, Pasadena, California 91125, USA.
authors: Chiara
authors: C
authors: Daraio