Liu Fengrui, Terakawa Tatsuro, Long Siying, Komori Masaharu
Department of Mechanical Engineering and Science, Kyoto University, Kyoto daigaku-katsura, Nishikyo-ku, Kyoto, 615-8540, Japan.
Sci Rep. 2024 Jan 2;14(1):145. doi: 10.1038/s41598-023-50353-4.
Rigid-foldable origami shows significant promise in advanced engineering applications including deployable structures, aerospace engineering, and robotics. It undergoes deformation solely at the creases during the folding process while maintaining rigidity throughout all facets. However, most types of cylindrical origami, such as Kresling origami, water-bomb origami, and twisted tower origami, lack rigid-foldability. Although shape transformation can be achieved through elastic folding, their limited rigid foldability constrains their engineering applications. To address this limitation, we proposed a type of cylindrical origami inspired by Kresling origami, named foldable prism origami (FP-ori), in this paper. FP-ori possesses not only rigid-foldability but also several tunable properties, including flat-foldability, self-locking, and bistability. The geometric properties of FP-ori were analyzed and the relationship between different parameters and tunable mechanical behaviors were verified through finite element method simulations, as well as experiments using paper models. Furthermore, we proposed stacked structures composed of multiple cubic FP-ori units, the rotation directions of which could be controlled through the combination arrangement. And drawing inspiration from kirigami, a negative Poisson's ratio tessellation structure was created. These results indicated that FP-ori has substantial potential for broad application in engineering fields.
刚性可折叠折纸在包括可展开结构、航空航天工程和机器人技术在内的先进工程应用中显示出巨大的潜力。在折叠过程中，它仅在折痕处发生变形，而在所有面上都保持刚性。然而，大多数类型的柱状折纸，如克雷斯林折纸、水炸弹折纸和扭曲塔折纸，都缺乏刚性可折叠性。虽然可以通过弹性折叠实现形状变换，但它们有限的刚性可折叠性限制了其工程应用。为了解决这一限制，我们在本文中提出了一种受克雷斯林折纸启发的柱状折纸，称为可折叠棱柱折纸（FP-ori）。FP-ori不仅具有刚性可折叠性，还具有几种可调特性，包括平面可折叠性、自锁性和双稳态性。分析了FP-ori的几何特性，并通过有限元方法模拟以及使用纸质模型的实验验证了不同参数与可调机械行为之间的关系。此外，我们提出了由多个立方FP-ori单元组成的堆叠结构，其旋转方向可以通过组合排列来控制。并从剪纸中获得灵感，创建了一种负泊松比镶嵌结构。这些结果表明，FP-ori在工程领域具有广泛应用的巨大潜力。
