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Published November 2016 | Published
Journal Article Open

Wave propagation in one-dimensional microscopic granular chains


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.

Additional Information

© 2016 American Physical Society. (Received 7 July 2016; revised manuscript received 4 October 2016; published 28 November 2016) The authors would like to acknowledge Prof. V. F. Nesterenko for fruitful discussions and Gladia Hotan for help in the experiments. This work has been supported by the MURI program, Project No. US ARO W911NF-09-1-0436, and made use of facilities supported by the Kavli Nanoscience Institute at Caltech.

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Published - PhysRevE.94.052907.pdf


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