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Remorphable Architectures: Reprogramming Global Bistability through Locally Bistable Metamaterials.

Lei Wu1, Shujia Chen1, Ali Elias Acha1

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|September 15, 2025
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Summary
This summary is machine-generated.

This study integrates local bistability within global structures, enabling reprogrammable global bistability. This novel approach allows for tailored mechanical responses and shape morphing in metamaterials.

Keywords:
BistabilityMechanical MetamaterialReprogrammabilityShape MorphingSoft Actuator

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Area of Science:

  • Materials Science
  • Mechanical Engineering
  • Robotics

Background:

  • Bistability allows systems to switch between two stable states via snapping instability.
  • Existing systems implement global (macroscopic shape change) or local (internal reconfiguration) bistability independently.
  • This limits the potential for synergistic benefits between different bistability mechanisms.

Purpose of the Study:

  • To integrate locally bistable metamaterials into globally bistable structures.
  • To achieve reprogrammable global bistability by controlling local unit cell states.
  • To explore the impact of local-to-global interplay on structural kinematics and functionality.

Main Methods:

  • Selective transitioning of local metamaterial unit cells into a self-contact state.
  • Encoding specific combinations of soft hinges into the global structure.
  • Analyzing the altered global kinematics, including triggering force, snapping trajectory, and energy barriers.

Main Results:

  • Demonstrated reprogrammable global bistability through local control.
  • Showcased metamaterial arch with multi-target actuation.
  • Developed a linkage capable of switching between multistable, bistable, and monostable states.
  • Enabled a dome structure to transform into various curved shapes.

Conclusions:

  • The local-to-global interplay in bistable metamaterials offers unprecedented control over structural behavior.
  • This approach enables the design of adaptive structures with tunable actuation and morphing capabilities.
  • Potential applications include multi-modal jumping robots and reconfigurable space structures.