论文标题
编程在多稳态机械超材料中的非逆转和可逆性
Programming nonreciprocity and reversibility in multistable mechanical metamaterials
论文作者
论文摘要
可以通过利用材料非线性来被动地实现非年份。特别是，最近已证明具有非对称能量景观的非线性双元素网络支持单向过渡波。但是，在这些系统中，只有当元素从较高孔切换到较低的能量井中，才能进行一次性信号传输。在这里，我们表明，在一个机械超材料中，包括一维拱形拱门的非阶层，非记录性和可逆性可以独立编程，并且不是相互排斥的。通过将浅拱与对称能井连接起来并减少能屏障，我们设计了可逆的机械二极管，该二极管可以维持多种信号传输。此外，通过与对称和不对称能量景观交替交替，我们意识到了一个非重新链链，该链能够沿相反方向传播不同的过渡波。
Nonreciprocity can be passively achieved by harnessing material nonlinearities. In particular, networks of nonlinear bistable elements with asymmetric energy landscapes have recently been shown to support unidirectional transition waves. However, in these systems energy can be transferred only when the elements switch from the higher to the lower energy well, allowing for a one-time signal transmission. Here, we show that in a mechanical metamaterial comprising a 1D array of bistable arches nonreciprocity and reversability can be independently programmed and are not mutually exclusive. By connecting shallow arches with symmetric energy wells and decreasing energy barriers, we design a reversible mechanical diode that can sustain multiple signal transmissions. Further, by alternating arches with symmetric and asymmetric energy landscapes we realize a nonreciprocal chain that enables propagation of different transition waves in opposite directions.
