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Rapid Manufacturing of Thin Soft Pneumatic Actuators and Robots
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Multi-Trigger Thermo-Electro-Mechanical Soft Actuators under Large Deformations.

Ebrahim Yarali1,2, Reza Noroozi2, Armin Yousefi2

  • 1Department of Engineering, School of Science and Technology, Nottingham Trent University, Nottingham NG11 8NS, UK.

Polymers
|February 28, 2020
PubMed
Summary
This summary is machine-generated.

This study presents a novel thermo-dielectric actuator capable of large bending. An electric field reduces the actuation moment, paving the way for advanced soft robotics and 4D printing applications.

Keywords:
finite element method (FEM)large bendingmulti-trigger soft actuatorssemi-analytical solutionthermo-electro-hyperelastic materials

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Area of Science:

  • Soft robotics and advanced materials science.

Background:

  • Dielectric actuators (DEAs) are crucial for soft robotics due to their unique properties.
  • Developing multi-stimuli actuators that respond to both thermal and electrical inputs is an active research area.

Purpose of the Study:

  • To investigate a multi-stimuli thermo-dielectric soft actuator under large bending conditions.
  • To analyze the influence of electric fields and thermal stimuli on actuator performance.

Main Methods:

  • Utilized nominal Helmholtz free energy density with two hyperelastic models.
  • Employed non-linear electro-elasticity theory and multiplicative decomposition of deformation gradient.
  • Solved governing equations using the second-order Runge-Kutta method and validated with FEM.

Main Results:

  • The electric field significantly reduces the actuation moment required for the soft actuator.
  • Investigated the distribution of stresses and mean radius of curvature under thermo-mechanical loadings.
  • Validated numerical results against finite element method (FEM) outcomes.

Conclusions:

  • The proposed thermo-dielectric actuator demonstrates efficient actuation with reduced moment under electric fields.
  • The model's accuracy and simplicity suggest potential for future applications in artificial muscles and 4D printing.