Related Experiment Video
Updated: Jun 14, 2025
14:42
Fabrication of Carbon-Based Ionic Electromechanically Active Soft Actuators
Published on: April 25, 2020
8.2K
Variable stiffness performance analysis of layer jamming actuator based on bionic adhesive flaps.
Liangzhi Ye1, Linsen Xu1,2,3, Zhihuan Wang1
1College of Mechanical and Electrical Engineering, Hohai University, Changzhou 213022, People's Republic of China.
Bioinspiration & Biomimetics
|August 30, 2024
Summary
This study introduces bionic adhesive flaps inspired by geckos to enhance soft actuators. These flaps significantly increase actuator stiffness and adhesive force, outperforming traditional materials.
Area of Science:
- Robotics
- Materials Science
- Biomimetics
Background:
- Soft actuators lack the precise force output of rigid actuators.
- Variable stiffness modules, like layer jamming, can improve soft actuator performance.
- Gecko-inspired designs offer potential for enhanced adhesion and stiffness.
Purpose of the Study:
- To develop and evaluate a novel layer jamming mechanism for soft actuators using bionic adhesive flaps.
- To model and experimentally validate the stiffness and adhesive properties of the bionic actuator.
- To compare the performance of the bionic actuator against traditional materials.
Main Methods:
- Manufacturing of a layer jamming actuator with bionic adhesive flaps.
- Development of equivalent stiffness models for unjammed and jammed states.
- Calculation of micropillar shear adhesive force using the Kendall viscoelastic band model.
- Finite element simulation to analyze interlaminar shear stress and stiffness.
- Experimental measurement of shear adhesive force and variable stiffness performance.
Main Results:
- Bionic adhesive flaps demonstrated 3.2 times higher critical shear adhesive force than PET.
- Anisotropic adhesion behavior was observed in the bionic material.
- Finite element simulations showed increased stiffness with applied pressure.
- The bionic actuator achieved a maximum stiffness of 8.027 N mm⁻¹, 1.5 times higher than PET-based actuators.
Conclusions:
- Bionic adhesive flaps significantly enhance the stiffness and adhesive capabilities of layer jamming soft actuators.
- The gecko-inspired design offers a superior alternative to conventional materials for variable stiffness applications.
- Simulation and experimental results validate the effectiveness of bionic flaps in improving soft actuator performance.
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