Programming stiff inflatable shells from planar patterned fabrics.
Programming stiff inflatable shells from planar patterned fabrics.
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DOI：
10.1039/d0sm01041c
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发表时间：
2020-07
期刊：
影响因子：
3.4
通讯作者：
Emmanuel Si'efert;E. Reyssat;J. Bico;B. Roman
中科院分区：
文献类型：
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作者：
Emmanuel Si'efert;E. Reyssat;J. Bico;B. Roman
缺乏刚度往往限制了薄型变形结构的小尺度。通过使用软水凝胶或弹性体来实现扭曲度量所需的大平面内变换。我们在这里介绍了一种多功能的单步方法来对刚性充气结构进行形状规划，为许多大规模应用打开了大门，从空间可展开结构到紧急避难所。该技术依赖于热封叠加平面准不可伸缩织物片获得的通道图案。膨胀通道引起面内各向异性收缩，从而可能引起高斯曲率的变化。接缝线作为面内变形的指导场，编码了所部署结构的形状。提出了三种图形化方法，对非欧几里得度量的壳进行定量和解析编程。除了形状外，我们还用标度定律描述了膨胀结构的力学性能。大型部署结构可以抵抗它们的重量，从而大大拓宽了应用程序的选择范围。
Lack of stiffness often limits thin shape-shifting structures to small scales. The large in-plane transformations required to distort the metrics are indeed commonly achieved by using soft hydrogels or elastomers. We introduce here a versatile single-step method to shape-program stiff inflated structures, opening the door for numerous large scale applications, ranging from space deployable structures to emergency shelters. This technique relies on channel patterns obtained by heat-sealing superimposed flat quasi-inextensible fabric sheets. Inflating channels induces an anisotropic in-plane contraction and thus a possible change of Gaussian curvature. Seam lines, which act as a director field for the in-plane deformation, encode the shape of the deployed structure. We present three patterning methods to quantitatively and analytically program shells with non-Euclidean metrics. In addition to shapes, we describe with scaling laws the mechanical properties of the inflated structures. Large deployed structures can resist their weight, substantially broadening the palette of applications.