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Related Experiment Video

Updated: Oct 14, 2025

Fabrication Process of Silicone-based Dielectric Elastomer Actuators
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Bioinspired Bistable Dielectric Elastomer Actuators: Programmable Shapes and Application as Binary Valves.

Shuzhen Wei1, Tushar K Ghosh1

  • 1Department of Textile Engineering, Chemistry and Science, Fiber and Polymer Science Program, North Carolina State University, Raleigh, North Carolina, USA.

Soft Robotics
|November 2, 2021
PubMed
Summary
This summary is machine-generated.

Engineers created a bistable actuator inspired by the Venus Flytrap, using dielectric elastomer layers for rapid, electrically triggered shape changes. This technology enables self-stabilizing binary valves for flow control.

Keywords:
binary valvesbioinspiredbistable structuresdielectric elastomer actuators

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Area of Science:

  • Materials Science
  • Mechanical Engineering
  • Biomimetics

Background:

  • Nature offers bistable thin structures for actuation via stimuli like touch and moisture.
  • These natural models inspire systems with improved shape stability and energy efficiency.
  • The Venus Flytrap's bistable leaf demonstrates rapid prey capture through unique actuation.

Purpose of the Study:

  • To develop a bistable actuator mimicking the Venus Flytrap's mechanism.
  • To incorporate dielectric elastomer (DE) layers for electrically controlled reversible snapping.
  • To explore bistable actuator design for applications like flow control.

Main Methods:

  • Fabrication of a trilayered laminated actuator with DE layers.
  • Analysis and experimental validation of bistable architecture design parameters.
  • Utilizing voltage pulses to trigger snap-through actuation between stable configurations.

Main Results:

  • Demonstrated a bistable actuator with reversible snapping via electrical stimulation.
  • The actuator's bistability arises from the balance between elastic and bending energies.
  • Actuation is triggered by a voltage pulse, with self-stabilization eliminating continuous power needs.

Conclusions:

  • A Venus Flytrap-inspired bistable actuator using DE layers was successfully developed.
  • The actuator exhibits rapid, electrically triggered snap-through between stable states.
  • Proposed application in flow control using bistable DE actuators as binary valves to modulate porosity on curved surfaces.