Wave propagation in one-dimensional microscopic granular chains

Wei-Hsun Lin and Chiara Daraio
Phys. Rev. E 94, 052907 – Published 28 November 2016

Abstract

We employ noncontact optical techniques to generate and measure stress waves in uncompressed, one-dimensional microscopic granular chains, and support our experiments with discrete numerical simulations. We show that the wave propagation through dry particles (150 μm radius) is highly nonlinear and it is significantly influenced by the presence of defects (e.g., surface roughness, interparticle gaps, and misalignment). We derive an analytical relation between the group velocity and gap size, and define bounds for the formation of highly nonlinear solitary waves as a function of gap size and axial misalignment.

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  • Received 7 July 2016
  • Revised 4 October 2016

DOI:https://doi.org/10.1103/PhysRevE.94.052907

©2016 American Physical Society

Physics Subject Headings (PhySH)

Nonlinear Dynamics

Authors & Affiliations

Wei-Hsun Lin1,2 and Chiara Daraio2,3

  • 1Department of Physics, California Institute of Technology, Pasadena, California 91125, USA
  • 2Mechanical and Process Engineering, ETH Zurich, 8092 Zurich, Switzerland
  • 3Engineering and Applied Science, California Institute of Technology, Pasadena, California 91125, USA

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Issue

Vol. 94, Iss. 5 — November 2016

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