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Highly nonlinear solitary wave propagation in Y-shaped granular crystals with variable branch angles

D. Ngo1,*, F. Fraternali2, and C. Daraio1,†

  • 1Engineering and Applied Science, California Institute of Technology, Pasadena California 91125, USA
  • 2Department of Civil Engineering, University of Salerno, Fisciano (SA), Italy

  • *Current address: School of Engineering, Eastern International University, Binh Duong, Vietnam.
  • †daraio@caltech.edu
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Phys. Rev. E 85, 036602 – Published 6 March, 2012

DOI: https://doi.org/10.1103/PhysRevE.85.036602

Abstract

We study the propagation of highly nonlinear waves in a branched (Y-shaped) granular crystal composed of chains of spherical particles of different materials, arranged at variable branch angles. We experimentally test the dynamic behavior of a solitary pulse, or of a train of solitary waves, crossing the Y-junction interface, and splitting between the two branches. We describe the dependence of the split pulses’ speed and amplitude on the branch angles. Analytic predictions based on the quasiparticle model and numerical simulations based on Hertzian interactions between the particles are found to be in excellent agreement with the experimental data.

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Phys. Rev. E 85, 036602– Published 6 March, 2012
  • Received 12 August 2011

©2012 American Physical Society

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