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具有多步可编程变换的可展开机械超材料。

Deployable mechanical metamaterials with multistep programmable transformation.

作者信息

Meng Zhiqiang, Liu Mingchao, Yan Hujie, Genin Guy M, Chen Chang Qing

机构信息

Department of Engineering Mechanics, CNMM and AML, Tsinghua University, Beijing 100084, PR China.

Mathematical Institute, University of Oxford, Woodstock Rd., Oxford OX2 6GG, UK.

出版信息

Sci Adv. 2022 Jun 10;8(23):eabn5460. doi: 10.1126/sciadv.abn5460. Epub 2022 Jun 8.

Abstract

Transformations in shape are critical to actuation in engineered metamaterials. Existing engineering metamaterials are typically limited to a small number of shape transformations that must be built-in during material synthesis. Here, inspired by the multistability and programmability of kirigami-based self-folding elements, a robust framework is introduced for the construction of sequentially programmable and reprogrammable mechanical metamaterials. The materials can be locked into multiple stable deployed configurations and then, using tunable bistability enabled by temperature-responsive constituent materials, return to their original reference configurations or undergo mode bifurcation. The framework provides a platform to design metamaterials with multiple deployable and reversible configurations in response to external stimuli.

摘要

形状转变对于工程超材料的驱动至关重要。现有的工程超材料通常局限于少数几种在材料合成过程中必须内置的形状转变。在此,受基于kirigami的自折叠元件的多重稳定性和可编程性启发,引入了一个强大的框架,用于构建顺序可编程和可重新编程的机械超材料。这些材料可以锁定在多种稳定的展开构型中,然后利用由温度响应性组成材料实现的可调双稳态,恢复到其原始参考构型或经历模式分叉。该框架提供了一个平台,可设计出响应外部刺激具有多种可展开和可逆构型的超材料。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/c66b/9176747/8b269d9cd91f/sciadv.abn5460-f1.jpg

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