Huygens-Kamerlingh Onnes Lab, Leiden University, P.O. Box 9504, 2300 RA Leiden, The Netherlands and AMOLF, Science Park 104, 1098 XG Amsterdam, The Netherlands.
J Chem Phys. 2022 May 28;156(20):204902. doi: 10.1063/5.0087863.
Materials that feature bistable elements, hysterons, exhibit memory effects. Often, these hysterons are difficult to observe or control directly. Here, we introduce a mechanical metamaterial in which slender elements, interacting with pushers, act as mechanical hysterons. We show how we can tune the hysteron properties and pathways under cyclic compression by the geometric design of these elements and how we can tune the pathways of a given sample by tilting one of the boundaries. Furthermore, we investigate the effect of the coupling of a global shear mode to the hysterons as an example of the interactions between hysteron and non-hysteron degrees of freedom. We hope our work will inspire further studies on designer matter with targeted pathways.
具有双稳态元件、滞后器的材料表现出记忆效应。通常，这些滞后器很难直接观察或控制。在这里，我们引入了一种机械超材料，其中细长元件与推动器相互作用，充当机械滞后器。我们展示了如何通过这些元件的几何设计来调整循环压缩下滞后器的特性和途径，以及如何通过倾斜边界之一来调整给定样本的途径。此外，我们研究了全局剪切模式与滞后器耦合的影响，这是滞后器与非滞后器自由度之间相互作用的一个例子。我们希望我们的工作将激发对具有目标途径的设计物质的进一步研究。
