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Simulation, Fabrication and Characterization of THz Metamaterial Absorbers
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Temperature-Responsive Multistable Metamaterials.

Lucia M Korpas1, Rui Yin1, Hiromi Yasuda1

  • 1Department of Mechanical Engineering and Applied Mechanics, University of Pennsylvania, Philadelphia, Pennsylvania 19104, United States.

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|June 24, 2021
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Summary
This summary is machine-generated.

Researchers developed reconfigurable materials by combining liquid crystal elastomers (LCEs) with multistable kirigami structures. These materials autonomously change shape and properties in response to temperature, enabling new applications in robotics and deployable systems.

Keywords:
3D printingliquid crystal elastomersmechanical metamaterialssoft active materialsstimulus responsive

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Area of Science:

  • Materials Science
  • Mechanical Engineering
  • Robotics

Background:

  • Adaptive materials are crucial for advanced applications like soft robots and deployable structures.
  • Liquid crystal elastomers (LCEs) offer tunable mechanical properties.
  • Multistable structures can exist in multiple stable configurations.

Purpose of the Study:

  • To integrate LCEs with multistable kirigami structures for autonomous, temperature-induced reconfiguration.
  • To explore the design principles for creating temperature-responsive bistable kirigami systems.
  • To demonstrate the propagation of structural changes within these materials.

Main Methods:

  • Fabrication of kirigami-inspired structures using LCE-silicone bilayer hinges.
  • Characterization of hinge behavior (bending and softening) with increasing temperature.
  • Analysis of structural stability transitions (mono-, tri-, to bistability) triggered by thermal changes.
  • Demonstration of temperature-induced transition wave propagation.

Main Results:

  • Successful integration of LCEs into kirigami hinges enables temperature-dependent mechanical response.
  • Geometric tuning of hinges allows for controlled transitions between stable states (mono-/tri- to bistability).
  • Observed autonomous propagation of structural transition waves through the material.
  • Demonstrated autonomous reconfiguration of the entire structure based on local temperature cues.

Conclusions:

  • The developed LCE-based multistable kirigami system offers autonomous, on-demand structural reconfiguration.
  • This approach provides a pathway for creating intelligent materials with programmable responses to thermal stimuli.
  • Potential applications include advanced interface control, reconfigurable systems, and sophisticated soft robotics.