Jin Lishuai, Forte Antonio Elia, Deng Bolei, Rafsanjani Ahmad, Bertoldi Katia
Department of Mechanics, Tianjin University, Tianjin, 300350, China.
John A. Paulson School of Engineering and Applied Sciences, Harvard University, Cambridge, MA, 02138, USA.
Adv Mater. 2020 Aug;32(33):e2001863. doi: 10.1002/adma.202001863. Epub 2020 Jul 6.
Kirigami, the Japanese art of paper cutting, has recently enabled the design of stretchable mechanical metamaterials that can be easily realized by embedding arrays of periodic cuts into an elastic sheet. Here, kirigami principles are exploited to design inflatables that can mimic target shapes upon pressurization. The system comprises a kirigami sheet embedded into an unstructured elastomeric membrane. First, it is shown that the inflated shape can be controlled by tuning the geometric parameters of the kirigami pattern. Then, by applying a simple optimization algorithm, the best parameters that enable the kirigami inflatables to transform into a family of target shapes at a given pressure are identified. Furthermore, thanks to the tessellated nature of the kirigami, it is shown that we can selectively manipulate the parameters of the single units to allow the reproduction of features at different scales and ultimately enable a more accurate mimicking of the target.
折纸艺术，即日本的剪纸艺术，最近使得可拉伸机械超材料的设计成为可能，这种超材料可以通过在弹性薄片中嵌入周期性切口阵列轻松实现。在此，利用折纸原理设计出充气装置，使其在加压时能够模仿目标形状。该系统由嵌入非结构化弹性体膜的折纸薄片组成。首先，研究表明，通过调整折纸图案的几何参数可以控制充气形状。然后，通过应用一种简单的优化算法，确定了使折纸充气装置在给定压力下转变为一系列目标形状的最佳参数。此外，由于折纸的镶嵌特性，研究表明我们可以有选择地操纵单个单元的参数，以便在不同尺度上再现特征，最终实现对目标更精确的模仿。
