Chi Yinding, Evans Emily E, Clary Matthew R, Qi Fangjie, Sun Haoze, Cantú Saarah Niesha, Capodanno Catherine M, Tracy Joseph B, Yin Jie
Department of Mechanical and Aerospace Engineering, North Carolina State University, Raleigh, NC 27695, USA.
Department of Physics and Astronomy, Elon University, Elon, NC 27244, USA.
Sci Adv. 2024 Dec 6;10(49):eadr8421. doi: 10.1126/sciadv.adr8421.
Soft shape-shifting materials offer enhanced adaptability in shape-governed properties and functionalities. However, once morphed, they struggle to reprogram their shapes and simultaneously bear loads for fulfilling multifunctionalities. Here, we report a dynamic spatiotemporal shape-shifting kirigami dome metasheet with high deformability and stiffness that responds rapidly to dynamically changing magnetic fields. The magnetic kirigami dome exhibits over twice higher doming height and 1.5 times larger bending curvature, as well as sevenfold enhanced structural stiffness compared to its continuous counterpart without cuts. The metasheet achieves omnidirectional doming and multimodal translational and rotational wave-like shape-shifting, quickly responding to changing magnetic fields within 2 milliseconds. Using the dynamic shape-shifting and adaptive interactions with objects, we demonstrate its applications in voxelated dynamic displays and remote magnetic multimodal directional and rotary manipulation of nonmagnetic objects without grasping. It shows high-load transportation ability of over 40 times its own weight, as well as versatility in handling objects of different materials (liquid and solid), sizes, shapes, and weights.
柔软的形状变换材料在形状控制的特性和功能方面具有更强的适应性。然而，一旦变形，它们就难以重新编程其形状，同时承受载荷以实现多功能性。在此，我们报告了一种动态时空形状变换的折纸穹顶超材料薄片，它具有高可变形性和刚度，能对动态变化的磁场做出快速响应。与没有切口的连续对应物相比，磁性折纸穹顶的穹顶高度高出两倍多，弯曲曲率大1.5倍，结构刚度提高了七倍。该超材料薄片实现了全方位穹顶以及多模式平移和旋转波状形状变换，能在2毫秒内快速响应变化的磁场。利用动态形状变换以及与物体的自适应相互作用，我们展示了它在体素动态显示以及对非磁性物体进行远程磁性多模式定向和旋转操作（无需抓取）方面的应用。它显示出超过自身重量40倍的高负载运输能力，以及处理不同材料（液体和固体）、尺寸、形状和重量物体的通用性。
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