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Mechanochemical Feedback Drives Complex Inertial Dynamics in Active Solids.

Siddhartha Sarkar1,2, Biswarup Ash1, Yueyang Wu1

  • 1University of Michigan, Department of Physics, Ann Arbor, Michigan 48109, USA.

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Summary
This summary is machine-generated.

Active solids can exhibit autonomous inertial dynamics when chemical fuel feedback overcomes damping. This research explores complex nonlinear behaviors like chaos in these active materials.

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Area of Science:

  • Soft Matter Physics
  • Nonlinear Dynamics
  • Active Matter

Background:

  • Active solids exhibit nonequilibrium mechanics and autonomous motion via internal driving and elasticity.
  • Inertia's role in active solids is underexplored, with most studies focusing on overdamped systems.

Purpose of the Study:

  • To model chemically active solids with mechanochemical feedback.
  • To investigate the emergence of autonomous inertial dynamics.
  • To analyze complex nonlinear behaviors driven by active feedback.

Main Methods:

  • Development of a theoretical model for chemically active solids.
  • Incorporation of mechanochemical feedback and mechanical damping.
  • Numerical simulations and dynamical systems analysis.

Main Results:

  • Autonomous inertial dynamics emerge when feedback surpasses damping, fueled by chemical energy.
  • Active feedback drives complex nonlinear dynamics across multiple timescales.
  • Limit cycles and chaotic behaviors are observed.

Conclusions:

  • Active feedback in chemically powered solids can lead to spontaneous inertial motion.
  • These findings offer design principles for ultrafast actuators and autonomous soft machines.