蜘蛛网激发的机械超材料
Spider-Web Inspired Mechanical Metamaterials
摘要：
蜘蛛丝是具有优异机械特性的生物材料的显著示例。其牵引丝和粘性丝的多级结构组织导致了不寻常的和可调的性质，从准静态的角度进行了广泛的研究。在这项研究中，灵感来自nephila蜘蛛球网络架构，我们提出了一种新的设计机械超材料的基础上，其周期性重复。我们证明了蜘蛛网超材料结构在动态响应和波衰减机制中起着重要的作用。所得到的结构，以抑制弹性波传播的亚波长的频率范围内的能力进行评估和参数的研究，以获得最佳的配置和组成的机械性能。结果表明，创新的轻质结构的设计，可调的振动阻尼和冲击保护，或大规模的基础设施，如悬索桥的保护的承诺。
英文摘要：
Spider silk is a remarkable example of bio-material with superior mechanical characteristics. Its multilevel structural organization of dragline and viscid silk leads to unusual and tunable properties, extensively studied from a quasi-static point of view. In this study, inspired by the Nephila spider orb web architecture, we propose a novel design for mechanical metamaterials based on its periodic repetition. We demonstrate that spider-web metamaterial structure plays an important role in the dynamic response and wave attenuation mechanisms. The capability of the resulting structure to inhibit elastic wave propagation in sub-wavelength frequency ranges is assessed and parametric studies are performed to derive optimal configurations and constituent mechanical properties. The results show promise for the design of innovative lightweight structures for tunable vibration damping and impact protection, or the protection of large scale infrastructure such as suspended bridges.
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