Mechanical instabilities are traditionally regarded as a route toward failure. However, they can also be exploited to design architected cellular materials with tunable functionality. In this review, we focus on three examples and show that mechanical instabilities in architected cellular materials can be harnessed (a) to design auxetic materials, (b) to control the propagation of elastic waves, and (c) to realize reusable energy-absorbing materials. Together, these examples highlight a new strategy to design tunable systems across a wide range of length scales.

中文翻译：

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利用不稳定性设计可调结构的蜂窝材料

机械不稳定性传统上被认为是导致故障的途径。然而，它们也可以用于设计具有可调功能的结构化蜂窝材料。在这篇综述中，我们关注三个例子，并表明可以利用结构化细胞材料的机械不稳定性（a）设计拉胀材料，（b）控制弹性波的传播，以及（c）实现可重复使用的能量吸收材料。这些示例共同突出了一种新策略，可以设计各种长度范围的可调系统。