Nonlinear Geometric Effects in Mechanical Bistable Morphing Structures
Nonlinear Geometric Effects in Mechanical Bistable Morphing Structures
复制标题
机械双稳态变形结构中的非线性几何效应
DOI：
10.1103/physrevlett.109.114302
复制
发表时间：
2012-09-14
影响因子：
8.6
通讯作者：
Haataja, Mikko P.
中科院分区：
文献类型：
--
作者：
Chen, Zi;Guo, Qiaohang;Haataja, Mikko P.
与非线性变形行为相关的双稳态结构（以捕蝇草和拍手镯为例）可以在驱动时在不同的功能形状之间切换。尽管在建模如此大的壳变形行为方面做出了许多努力，但机械和非线性几何效应对双稳态的作用仍然难以捉摸。我们通过理论分析和桌面实验证明，两个无量纲参数控制双稳态。我们的工作对双稳态条件进行了分类，并扩展了板壳大变形理论。
Bistable structures associated with nonlinear deformation behavior, exemplified by the Venus flytrap and slap bracelet, can switch between different functional shapes upon actuation. Despite numerous efforts in modeling such large deformation behavior of shells, the roles of mechanical and nonlinear geometric effects on bistability remain elusive. We demonstrate, through both theoretical analysis and tabletop experiments, that two dimensionless parameters control bistability. Our work classifies the conditions for bistability, and extends the large deformation theory of plates and shells.