Exploiting pattern transformation to tune phononic band gaps in a two-dimensional granular crystal | Zendy

Fatih Göncü | Zendy; Stefan Luding | Zendy; Katia Bertoldi | Zendy

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Exploiting pattern transformation to tune phononic band gaps in a two-dimensional granular crystal

Author(s) -

Fatih Göncü,

Stefan Luding,

Katia Bertoldi

Publication year - 2012

Publication title -

the journal of the acoustical society of america

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.619

H-Index - 187

eISSN - 1520-8524

pISSN - 0001-4966

DOI - 10.1121/1.4718384

Subject(s) - materials science , silicone rubber , transformation (genetics) , polytetrafluoroethylene , deformation (meteorology) , composite material , dispersion (optics) , compression (physics) , crystal (programming language) , band gap , electronic band structure , crystal structure , dispersion relation , natural rubber , condensed matter physics , optics , crystallography , optoelectronics , physics , computer science , biochemistry , chemistry , gene , programming language

The band structure of a two-dimensional granular crystal composed of silicone rubber and polytetrafluoroethylene (PTFE) cylinders is investigated numerically. This system was previously shown to undergo a pattern transformation with uniaxial compression by Göncü et al. [Soft Matter 7, 2321 (2011)]. The dispersion relations of the crystal are computed at different levels of deformation to demonstrate the tunability of the band structure, which is strongly affected by the pattern transformation that induces new band gaps. Replacement of PTFE particles with rubber ones reveals that the change of the band structure is essentially governed by pattern transformation rather than particles' mechanical properties.

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