Pruning bright bonds to engineer smart networks

ORAL

Abstract

Disordered networks made of harmonic springs can be tuned to show various unconventional responses. For example, a network could be designed to respond to an input strain with a very specific localized output at a distant site. One could also modify a network’s global mechanical properties, such as the Poisson’s ratio. We have experimentally realized both of these in physical systems [1, 2]. There are multiple pruning algorithms that can achieve such responses. We are working on algorithms that could be applied on networks in situ. We make our networks out of photoelastic material and observe them between cross polarizers. This allows us to visualize the stress distribution in these networks under various deformations. With this technique, we can apply various algorithms to an experimental system. This enables us to design networks with desirable responses without any numerical calculations.
References:
[1] JW Rocks, N Pashine, I Bischofberger, CP Goodrich, AJ Liu, and SR Nagel, PNAS 114, 2520–2525 (2017)
[2] DR Reid, N Pashine, JM Wozniak, HM Jaeger, AJ Liu, SR Nagel, JJ de Pablo, arXiv: 1710.02493 (2017)

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Presenters

  • Nidhi Pashine

    Univ of Chicago

Authors

  • Nidhi Pashine

    Univ of Chicago

  • Daniel Hexner

    James Franck Institute, University of Chicago, Univ of Chicago, The James Franck Institute, The University of Chicago

  • Jason Rocks

    Univ of Pennsylvania, Department of Physics and Astronomy, University of Pennsylvania

  • Daniel Reid

    Institute for Molecular Engineering, University of Chicago, Univ of Chicago

  • Irmgard Bischofberger

    MIT, MECHE, Massachusetts Institute of Technology, Massachusetts Institute of Technology-MIT

  • Carl Goodrich

    Harvard University, Harvard Univ

  • Justin Wozniak

    Argonne National Lab, Mathematics and Computer Science, Argonne National Laboratory, Argonne National Laboratory

  • Heinrich Jaeger

    Physics, Univ of Chicago, Univ of Chicago

  • Andrea Liu

    University of Pennsylvania, Univ of Pennsylvania, Department of Physics and Astronomy, Department of Physics and Astronomy, Department of Physics and Astronomy, University of Pennsylvania

  • Juan De Pablo

    Institute for Molecular Engineering, The University of Chicago, Institute for Molecular Engineering, Univ of Chicago, Institute for molecular engineering, The University of Chicago, University of Chicago, Univ of Chicago, Institute for Molecular Engineering, University of Chicago, The Institute for Molecular Engineering, The University of Chicago, Institute of Molecular Engineering, University of Chicago

  • Sidney Nagel

    Univ of Chicago, Physics, Univ of Chicago, The James Franck Institute, The University of Chicago, Department of Physics, University of Chicago