Propagation of strongly nonlinear signals in a two dimensional network of granular chains

ORAL

Abstract

We report experimental observation of strongly nonlinear signals propagating in a two dimensional system composed of guided granular chains. In this system one of the chains contacts two others to allow splitting and redirecting the solitary-like signal formed by impact on the first chain. The system consists of a double Y-shaped guide in which high- and low-modulus chains of spheres are arranged in various geometries. We observed fast splitting of the initial pulse, rapid chaotization of the signal and sharp bending of the propagating acoustic information. Pulse and energy trapping in the branches was also observed in composite systems assembled from hard- and soft- particles.

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Authors

  • Chiara Daraio

    Aeronautics and Applied Physics, California Institute of Technology

  • Vitali Nesterenko

    Department of Mechanical and Aerospace Engineering,University of California San Diego, CA 92093, University of California, San Diego, Dept. of Mechanical and Aerospace Engineering, University of California, San Diego, La Jolla, CA 92093-0411, Mechanical and Aerospace Engineering Department, University of California, San Diego, Department of Mechanical and Aerospace Engineering, University of California at San Diego, La Jolla, California 92093-0418