2025-01-17 カリフォルニア工科大学（Caltech）
＜関連情報＞
- https://www.caltech.edu/about/news/reimagining-chain-mail
- https://www.science.org/doi/10.1126/science.adr9713
3Dポリカテネート材料 3D polycatenated architected materials
Wenjie Zhou, Sujeeka Nadarajah, Liuchi Li, Anna Guell Izard, […], and Chiara Daraio
Science Published:16 Jan 2025
DOI:https://doi.org/10.1126/science.adr9713
Editor’s summary
Architected materials are engineered such that the structure of the base elements affects the mechanical properties. This engineering provides the ability to tune the materials’ response to stresses. Zhou et al. present a new family called polycatenated architected materials that link together wireframe elements into three-dimensional structures (see the Perspective by Tawfick and Arretche). The design strategy allows for tailored mechanical responses that are useful for developing stimuli-responsive or energy-absorbing systems, along with morphing architectures. —Brent Grocholski
Abstract
Architected materials derive their properties from the geometric arrangement of their internal structural elements. Their designs rely on continuous networks of members to control the global mechanical behavior of the bulk. In this study, we introduce a class of materials that consist of discrete concatenated rings or cage particles interlocked in three-dimensional networks, forming polycatenated architected materials (PAMs). We propose a general design framework that translates arbitrary crystalline networks into particle concatenations and geometries. In response to small external loads, PAMs behave like non-Newtonian fluids, showing both shear-thinning and shear-thickening responses, which can be controlled by their catenation topologies. At larger strains, PAMs behave like lattices and foams, with a nonlinear stress-strain relation. At microscale, we demonstrate that PAMs can change their shapes in response to applied electrostatic charges. The distinctive properties of PAMs pave the path for developing stimuli-responsive materials, energy-absorbing systems, and morphing architectures.
