2026-03-20 ノースカロライナ州立大学（NC State）
＜関連情報＞
- https://news.ncsu.edu/2026/03/magnets-metamaterial-behavior/
- https://www.science.org/doi/10.1126/sciadv.aec3182
磁気結合により、軟質メタマテリアルにおけるランダムなスナップ動作が秩序だったシーケンスに変換される Magnetic coupling transforms random snapping into ordered sequences in soft metamaterials
Haoze Sun, Gabriel Alkuino, Yinding Chi, Yevhen Zabila, […] , and Jie Yin
Science Advances Published:20 Mar 2026
DOI:https://doi.org/10.1126/sciadv.aec3182
Abstract
Mechanical metamaterials achieve multistep, programmable responses through sequential deformation driven by snapping instabilities, yet these sequences are typically governed by unavoidable imperfections, resulting in random and uncontrollable behavior. Here, we harness intra- and interlayer magnetic interactions coupled with elasticity to reprogram the ordering of sequential buckling instabilities in kirigami-inspired soft magnetic metamaterials. In single-layer systems, intralayer coupling among magnetized units produces random snapping sequences but generates strongly nonlinear-spiked force-displacement responses with pronounced hysteresis, in contrast to the simultaneous buckling of unmagnetized sheets. In multilayer assemblies, interlayer magnetic interactions trigger chain reaction–like propagation, transforming randomness into robust, directional snapping across structures. This mechanism establishes a paradigm for deterministic, multistep mechanical responses without continuously applied fields and opens avenues for adaptive materials in energy dissipation, waveguiding, reconfigurable soft robotics, and biomedical devices.
