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arXiv 2006.05149cond-mat.soft
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低模机械超材料

Oligomodal mechanical metamaterials

Aleksi Bossart, David M. J. Dykstra, Jop van der Laan, Corentin Coulais

摘要:

机械超材料是一种具有负泊松比、形变、拓扑保护、多稳定性和增强的能量耗散等多种先进功能的人工复合材料。迄今为止,大多数超材料都具有单一性质,例如单一形状变化,或者是多能的,\emph{i.e.}它们可以有许多不同的响应,但需要复杂的致动协议。在这里,我们介绍了一类新的寡模态超材料,编码几个不同的属性,可以选择性地控制单轴压缩。特别是,我们实现了一种超材料,具有负(正)泊松比低(高)压缩率。我们的寡模态超材料在单个结构中承载多种机械响应的能力使它们成为多功能物质的早期例子,并为实现强大和适应性强的设备铺平了道路。

英文摘要:

Mechanical metamaterials are artifical composites that exhibit a wide range of advanced functionalities such as negative Poisson's ratio, shape-shifting, topological protection, multistability, and enhanced energy dissipation. To date, most metamaterials have a single property, e.g. a single shape change, or are pluripotent, \emph{i.e.} they can have many different responses, but require complex actuation protocols. Here, we introduce a novel class of oligomodal metamaterials that encode a few distinct properties that can be selectively controlled under uniaxial compression. In particular, we realise a metamaterial that has a negative (positive) Poisson's ratio for low (high) compression rate. The ability of our oligomodal metamaterials to host multiple mechanical responses within a single structure makes them an early example of multi-functional matter and paves the way towards robust and adaptable devices.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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