发表机构
J.A.Paulson School of Engineering and Applied Sciences, Harvard University; PSL University; Department of Precision and Microsystems Engineering, Delft University of Technology（哈佛大学生物工程与应用科学学院; 巴黎文理研究大学; 代尔夫特理工大学精密与微系统工程系）
机构由 AI 辅助整理，请以论文原文为准。AI 中文总结
本研究提出利用双稳态屈曲垫片作为可重编程折纸铰链，通过切换垫片状态逆转折叠偏好，实现单张折纸在全局机械输入下重构为多种三维形状，为多功能可重构结构提供通用框架。
AI 中文摘要
折纸结构通常具有多个与平面薄片相连的折叠状态，这使得针对特定最终形状的折叠方案难以设计和实施。在此，我们引入了可重编程的折纸铰链，利用双稳态屈曲垫片可逆地控制其偏好的折叠方向。嵌入铰链中的垫片产生非对称的扭矩-角度响应，偏向于山折或谷折。将垫片在其两个稳定状态之间切换可逆转此响应，从而允许每个铰链的折叠方向在制造后被重新编程。通过独立控制垫片的状态和几何形状，我们使单个折纸片能够访问多个折叠分支并转变为预定的三维形状。我们进一步引入了自切换铰链，其中折叠导致垫片在其稳定状态之间快速切换。这些元件允许薄片在施加于边界的全局机械输入下重新编程其折叠路径。我们的方法将形状选择和转变规则直接嵌入铰链的力学机制中，为创建多功能、可展开和可重构结构提供了一个通用框架。
英文摘要
Origami structures typically have a multiplicity of folded states that are connected to a flat sheet, making the folding protocol for specific end shapes challenging to design and deploy. Here, we introduce reprogrammable origami hinges that use bistable buckled shims to reversibly control their preferred folding direction. A shim embedded across a hinge produces an asymmetric torque-angle response that favors either mountain or valley folding. Switching the shim between its two stable states reverses this response, allowing the folding direction of each hinge to be reprogrammed after fabrication. By independently controlling the states and geometries of the shims, we enable a single origami sheet to access multiple folding branches and transform into prescribed three-dimensional shapes. We further introduce self-switching hinges in which folding causes the shims to snap between their stable states. These elements allow the sheet to reprogram its folding pathway under global mechanical inputs applied to the boundaries. Our approach embeds both shape selection and transition rules directly within the mechanics of the hinges, providing a versatile framework for creating multifunctional, deployable, and reconfigurable structures.
