Bi-stiffness property of motion structures transformed into square cells
Bi-stiffness property of motion structures transformed into square cells
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DOI：
10.1098/rspa.2013.0063
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发表时间：
2013-08-08
影响因子：
3.5
通讯作者：
Tanaka, Hiro
中科院分区：
文献类型：
--
作者：
Tanaka, Hiro
具有内部微观结构的多孔固体由于其轻质的身体而能够减少一些环境负荷，并提供独特的弹性，电磁和热性能。特别是，它们的大变形而不改变拓扑结构是它们最有趣的固体性质之一。在这项研究中，我们提出了一个酒吧和关节框架组装的基本单元的运动结构，它具有八重旋转对称性（MS-8）。MS-8是由四个正方形组成，以同心的方式排列，根据内部正方形的协调旋转，这些正方形被转换成两种不同的正方形单元排列模式中的任何一种。正方形单元具有极强的各向异性，这就是MS-8的刚度在转换过程中发生显著变化的原因。因此，MS-8根据两种不同的运动表现出双刚度。利用双刚度特性，讨论了MS-8 s重复结构变形行为的可能性。
Cellular solids with internal microstructures enable the reduction in some environmental loads because of their lightweight bodies, and deliver unique elastic, electromagnetic and thermal properties. In particular, their large deformability without topological change is one of their most interesting solid properties. In this study, we propose a bar-and-joint framework assembled with a basic unit of motion structure, which has eightfold rotational symmetry (MS-8). The MS-8 is made of tetragons, arranged in a concentric fashion, which are transformed into either one of two different aligned patterns of square cells according to the coordinated rotations of the inside squares. Square cells are extremely anisotropic, which is why the stiffness of the MS-8 changes dramatically in the transformation process. Thus, the MS-8 exhibits bi-stiffness according to the two different motions. Taking advantage of the bi-stiffness property, the possibilities of deformation behaviours for repetitive structures of MS-8s are discussed.