Kavli Affiliate: Chiara Daraio
| First 5 Authors: Wenjie Zhou, Sujeeka Nadarajah, Liuchi Li, Anna G. Izard, Hujie Yan
| Summary:
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.
Here, 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 particles’
concatenations and geometries. In response to small external loads, PAMs behave
like non-Newtonian fluids, showing both shear-thinning and shear-thickening
responses. 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. PAM’s unique
properties pave the path for developing stimuli-responsive materials,
energy-absorbing systems and morphing architectures.
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