Department of Engineering, University of Cambridge, Cambridge CB2 1PZ, United Kingdom.
Proc Natl Acad Sci U S A. 2013 Feb 26;110(9):3276-81. doi: 10.1073/pnas.1217998110. Epub 2013 Feb 11.
This paper describes two folded metamaterials based on the Miura-ori fold pattern. The structural mechanics of these metamaterials are dominated by the kinematics of the folding, which only depends on the geometry and therefore is scale-independent. First, a folded shell structure is introduced, where the fold pattern provides a negative Poisson's ratio for in-plane deformations and a positive Poisson's ratio for out-of-plane bending. Second, a cellular metamaterial is described based on a stacking of individual folded layers, where the folding kinematics are compatible between layers. Additional freedom in the design of the metamaterial can be achieved by varying the fold pattern within each layer.
本文介绍了两种基于三原折型褶皱模式的折叠超材料。这些超材料的结构力学主要由折叠的运动学决定，而折叠的运动学仅取决于几何形状，因此与尺度无关。首先，引入了一种折叠壳结构，其中褶皱模式为面内变形提供了负泊松比，为面外弯曲提供了正泊松比。其次，基于单个折叠层的堆叠，描述了一种多孔超材料，其中各层之间的折叠运动学是相容的。通过在每层内改变褶皱模式，可以为超材料的设计提供更多的自由度。
