Spider-Web Inspired Mechanical Metamaterials

TL;DR

Inspired by spider web architecture, this study introduces a novel mechanical metamaterial design that effectively inhibits elastic wave propagation, offering potential for lightweight vibration damping and impact protection.

Contribution

The paper presents a new spider-web inspired metamaterial design that enhances dynamic response control and wave attenuation capabilities.

Findings

Effective wave inhibition in sub-wavelength frequencies

Parametric optimization of structure and material properties

Potential applications in vibration damping and infrastructure protection

Abstract

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.