Reconfigurable soft body trajectories using unidirectionally stretchable composite laminae
Reconfigurable soft body trajectories using unidirectionally stretchable composite laminae
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DOI：
10.1038/s41467-019-11294-7
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发表时间：
2019-08-01
影响因子：
16.6
通讯作者：
Kramer-Bottiglio, Rebecca
中科院分区：
文献类型：
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作者：
Kim, Sang Yup;Baines, Robert;Kramer-Bottiglio, Rebecca
柔顺、连续的结构使生物能够完成人工刚性系统无法完成的复杂任务。尽管超弹性材料的进步刺激了合成软结构（即人造肌肉）的发展，但这些结构还无法与生物运动的精确控制和多样性相匹配。例如，头足类动物的触须可以通过肌肉静水器经历多种轨迹，肌肉静水器是一种由单向肌肉纤维聚集层组成的结构。在这里，我们提出了一种受肌肉静水器结构形态启发的自粘复合层，它粘附在任何体积膨胀的软体上，以控制其运动轨迹。由于超弹性基体中单向嵌入了不可拉伸的连续纤维，复合材料层仅在一个方向上可拉伸。我们展示了二维和三维软体的膨胀轨迹的重新配置，通过简单地将层压层粘附到它们的表面。
Compliant, continuum structures allow living creatures to perform complex tasks inaccessible to artificial rigid systems. Although advancements in hyper-elastic materials have spurred the development of synthetic soft structures (i.e., artificial muscles), these structures have yet to match the precise control and diversity of motions witnessed in living creatures. Cephalopods tentacles, for example, can undergo multiple trajectories using muscular hydrostat, a structure consisting of aggregated laminae of unidirectional muscle fibers. Here, we present a self-adhesive composite lamina inspired by the structural morphology of the muscular hydrostat, which adheres to any volumetrically expanding soft body to govern its motion trajectory. The composite lamina is stretchable only in one direction due to inextensible continuous fibers unidirectionally embedded within its hyper-elastic matrix. We showcase reconfiguration of inflation trajectories of two- and three-dimensional soft bodies by simply adhering laminae to their surfaces.