Breathers in a locally resonant granular chain with precompression
- Univ. of Pittsburgh, PA (United States)
- INRIA Grenoble-Rhone Alpes, Montbonnot-Saint-Martin (France)
- Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Here we study a locally resonant granular material in the form of a precompressed Hertzian chain with linear internal resonators. Using an asymptotic reduction, we derive an effective nonlinear Schrödinger (NLS) modulation equation. In turn, this leads us to provide analytical evidence, subsequently corroborated numerically, for the existence of two distinct types of discrete breathers related to acoustic or optical modes: (a) traveling bright breathers with a strain profile exponentially vanishing at infinity and (b) stationary and traveling dark breathers, exponentially localized, time-periodic states mounted on top of a non-vanishing background. Moreover, the stability and bifurcation structure of numerically computed exact stationary dark breathers is also examined. Stationary bright breathers cannot be identified using the NLS equation, which is defocusing at the upper edges of the phonon bands and becomes linear at the lower edge of the optical band.
- Research Organization:
- Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
- Sponsoring Organization:
- USDOE
- Grant/Contract Number:
- DMS-1007908; DMS-1506904; FA9550-12-1-0332; W911NF-15-1-0604; AC52-06NA25396
- OSTI ID:
- 1258012
- Alternate ID(s):
- OSTI ID: 1359742
- Report Number(s):
- LA-UR-15-25012
- Journal Information:
- Physica. D, Nonlinear Phenomena, Vol. 331, Issue C; ISSN 0167-2789
- Publisher:
- ElsevierCopyright Statement
- Country of Publication:
- United States
- Language:
- English
Web of Science
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