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Fabrication of Carbon-Based Ionic Electromechanically Active Soft Actuators
Published on: April 25, 2020
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EXPERIMENTAL INVESTIGATION OF THE MECHANISMS AND PERFORMANCE OF ACTIVE AUXETIC AND SHEARING TEXTILES
Rachael Granberry1, Brad Holschuh1, Julianna Abel2
1Department of Design, Housing, and Apparel, University of Minnesota, Saint Paul, MN.
Proceedings of the ASME Conference on Smart Materials, Adaptive Structures, and Intelligent Systems. ASME Conference on Smart Materials, Adaptive Structures, and Intelligent Systems
|February 22, 2020
Summary
Researchers developed novel active auxetic and shearing textiles using shape memory alloys. These smart textiles exhibit unique anisotropic and auxetic behaviors, enabling new possibilities for wearables and robotics.
Area of Science:
- Materials Science
- Textile Engineering
- Mechanical Engineering
Background:
- Anisotropic textiles are crucial for wearable tech, offering tunable stress-strain properties.
- Auxetic textiles (negative Poisson's ratio) and active textiles with integrated smart materials show promise for advanced functionalities.
Purpose of the Study:
- To experimentally investigate novel active auxetic and shearing textile structures.
- To explore the integration of shape memory alloys into textile designs for spatial actuation.
Main Methods:
- Fabricated five textile structures using shape memory alloy wire in needle lace and weft knit designs.
- Conducted temperature-controlled biaxial tensile testing to analyze actuation and anisotropy.
Main Results:
- All fabricated active textiles demonstrated anisotropic behavior.
- Four out of five structures exhibited auxetic behavior with a negative Poisson's ratio (v = -0.3 to -1.5).
- One structure displayed novel shearing behavior with a mean free angle recovery of 7°.
Conclusions:
- The developed active auxetic, anisotropic, and shearing textiles offer unique spatial performance.
- These smart textiles open new avenues for smart wearables, soft robotics, aerospace structures, and medical devices.
