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Bioinspired, Rapidly Responsive Magnetically Tunable Stiffness Metamaterials
Gooyoon Chung1, Huy Le Quang2,3, Jung Hyun Kim2,3
1Department of Materials Science and Engineering, Kyung Hee University, Yongin, 17104, Republic of Korea.
Advanced Materials (Deerfield Beach, Fla.)
|May 27, 2025
Summary
This study introduces magnetically tunable stiffness metamaterials (MTSM) with a bioinspired design for rapid and precise stiffness changes. These advanced materials offer a new foundation for adaptable programmable mechanical systems.
Area of Science:
- Materials Science
- Mechanical Engineering
- Biomimetics
Background:
- Programmable mechanical materials need dynamic stiffness adaptability.
- Existing solutions suffer from slow response times and limited precision.
Purpose of the Study:
- Introduce magnetically tunable stiffness metamaterials (MTSM) with a bioinspired ternary programming framework.
- Achieve rapid and precise stiffness modulation in programmable materials.
Main Methods:
- Utilize direct ink writing, a 4D printing method.
- Incorporate neodymium microparticles and a styrene-isoprene-styrene polymer matrix.
- Employ a bioinspired ternary programming framework mimicking biological sarcomeres.
Main Results:
- MTSM transitions between soft, moderate, and stiff states via magnetic torque-controlled structural deformation.
- 3D MTSM arrays allow multi-layer stiffness adjustments under magnetic fields.
- Achieved a 390% stiffness modulation range with rapid response to magnetic fields.
Conclusions:
- Ternary programming in MTSM offers a novel approach for programmable mechanical systems.
- MTSM demonstrates potential for next-generation adaptable materials with enhanced efficiency.
- Bioinspired design overcomes limitations of current stiffness modulation technologies.
Keywords:
4D printingactive mechanical metamaterialsbioinspiredstimuli‐responsive materialsternary programmingtunable stiffnessMore Related Videos
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