Magneto-thermomechanically triggered active mechanical metamaterials -- untethered, reversible, reprogrammable transformations with shape locking
Bihui Zou, Zihe Liang, Zhiming Cui, Kai Xiao, Shuang Shao, Jaehyung Ju · Adv. Mater. 35 (2023) 2207349 · 2022
A magneto-thermomechanical method uses shape-memory polymer prestress and asymmetric magnetic torque to achieve untethered, reversible, reprogrammable metamaterial transformations with shape locking.
Plain English summary
Why this matters
Key findings
- A magneto-thermomechanical tool is demonstrated to enable untethered, reversible transformations with shape locking.
- Reprogrammable (multimodal) deformations are achieved using magneto-thermomechanical triggering of prestress on a shape memory polymer.
- Structural instability with asymmetric magnetic torque is used to drive the transformation.
- The approach combines magnetic control with shape-memory polymer thermomechanics without requiring new materials synthesis or high-power reprogramming energy.
- The authors position the method as a route toward active metamaterials and multimodal morphing structures for soft robotics.
Limitations
The abstract does not specify quantitative performance metrics (e.g., speed, power consumption values, number of modes, durability, or operating ranges) or experimental setup details beyond the described concepts.
Publication
- Publisher
- arXiv
- Journal
- Adv. Mater. 35 (2023) 2207349
- Publication date
- July 7, 2022
- Research type
- Paper
- arXiv
- 2207.03177
- Access
- open
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