Soft Actuation of Structured Cylinders through Auxetic Behavior
Soft Actuation of Structured Cylinders through Auxetic Behavior
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DOI：
10.1002/adem.201400433
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发表时间：
2015-06-01
影响因子：
3.6
通讯作者：
Reis, Pedro M.
中科院分区：
文献类型：
--
作者：
Lazarus, Arnaud;Reis, Pedro M.
最近，对负泊松比（负泊松比）材料的研究激增，这种材料的功能来源于底层结构的机械不稳定性。最简单的辅助设计之一包括一个有一系列空洞图案的弹性体板。[6,7]在单轴压缩下，与孔洞相邻的细长韧带协同屈曲，导致正交方向收缩，泊松比为负。这种机制也应用于有图案的球形壳体中，可以在保持球形的同时显着减少载荷下的体积。我们认为这种由屈曲引起的自折叠是一种最小的软驱动机制，具有单一径向自由度。
There has been a recent upsurge in the study of auxetic, or negative Poisson’s ratio, materials that derive functionality from mechanical instabilities of the underlying structure. One of the simplest auxetic designs comprises an elastomeric slab patterned with an array of voids. [6,7] Under uniaxial compression, the slender ligaments contiguous to the voids buckle cooperatively, resulting in the shrinkage in the orthogonal direction, and hence a negative Poisson’s ratio. This mechanism has also been implemented in patterned spherical shells that can significantly reduce their volume under loading, while remaining spherical. [12] We regard this self-folding induced by buckling as a minimal mechanism for soft actuation, with a single radial degree of freedom.