论文标题
部分可观测时空混沌系统的无模型预测
Slow kinks in dissipative kirigami
论文作者
论文摘要
在自然界中经常遇到没有惯性的机械波 - 例如植物的运动 - 然而，这种波浪在合成材料中仍然很少见。在这里，我们发现了过度阻尼的超材料中缓慢扭结的出现，我们表明它们可用于诸如感应，动态模式变形和物体传输等应用。为此，我们以适当的图案化粘弹性创建了耗散的基里加米。这些Kirigami形状变化为不同的纹理，具体取决于它们的拉伸速度。我们发现，如果我们快速伸展并等待，粘弹性基里加米最终可以从一种纹理转移到另一种纹理。至关重要的是，这种折断的不稳定性发生在序列中，而行进的扭结却出现了。我们证明了这种扭结基础在2D基里加米中的动态形状变形，可用于运输对象。我们的结果开辟了用于在超材料，软机器人技术和仿生中使用慢速扭结的途径。
Mechanical waves that travel without inertia are often encountered in nature -- e.g. motion of plants -- yet such waves remain rare in synthetic materials. Here, we discover the emergence of slow kinks in overdamped metamaterials and we show that they can be used for applications such as sensing, dynamic pattern morphing and transport of objects. To do this, we create dissipative kirigami with suitably patterned viscoelasticity. These kirigami shape-change into different textures depending on how fast they are stretched. We find that if we stretch fast and wait, the viscoelastic kirigami can eventually snap from one texture to another. Crucially, such a snapping instability occurs in a sequence and a travelling overdamped kink emerges. We demonstrate that such kink underpins dynamic shape morphing in 2D kirigami and can be used to transport objects. Our results open avenues for the use of slow kinks in metamaterials, soft robotics and biomimicry.
