Bio-inspired pneumatic shape-morphing elastomers
Bio-inspired pneumatic shape-morphing elastomers
复制标题
受生物启发的气动形状变形弹性体
DOI：
10.1038/s41563-018-0219-x
复制
发表时间：
2019-01-01
期刊：
影响因子：
41.2
通讯作者：
Roman, Benoit
中科院分区：
文献类型：
--
作者：
Siefert, Emmanuel;Reyssat, Etienne;Roman, Benoit
形状变形结构是未来航空（1），微创手术（2），组织工程（3）和智能材料（4）应用的核心。然而，目前的工程技术，基于非均匀驱动整个细长结构的厚度，本质上限于单向弯曲（5）。在这里，我们描述了一种策略，介观结构的弹性体板进行快速，可控和复杂的形状转换下施加的压力。类似于基于软水凝胶溶胀的开创性技术（6-10），这些气动形状变形弹性体（在此称为“气压变形”）受到生物结构的形态发生的启发（11-15）。通过嵌入橡胶板内部的特定气道网络精确控制局部生长速率和方向，克服了几何限制。我们展示了如何任意的三维形状可以编程使用的分析理论模型，提出了一个直接的几何反问题的解决方案，并说明了该技术的多功能性与配置的集合。
Shape-morphing structures are at the core of future applications in aeronautics(1), minimally invasive surgery(2), tissue engineering(3) and smart materials(4). However, current engineering technologies, based on inhomogeneous actuation across the thickness of slender structures, are intrinsically limited to one-directional bending(5). Here, we describe a strategy where mesostructured elastomer plates undergo fast, controllable and complex shape transformations under applied pressure. Similar to pioneering techniques based on soft hydrogel swelling(6-10), these pneumatic shape-morphing elastomers, termed here as 'baromorphs', are inspired by the morphogenesis of biological structures(11-15). Geometric restrictions are overcome by controlling precisely the local growth rate and direction through a specific network of airways embedded inside the rubber plate. We show how arbitrary three-dimensional shapes can be programmed using an analytic theoretical model, propose a direct geometric solution to the inverse problem, and illustrate the versatility of the technique with a collection of configurations.