The Twisting of Dome-Like Metamaterial from Brittle to Ductile

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

1 Scopus Citations
View graph of relations

Author(s)

Detail(s)

Original languageEnglish
Article number2002701
Number of pages9
Journal / PublicationAdvanced Science
Volume8
Issue number13
Online published1 May 2021
Publication statusPublished - 7 Jul 2021

Link(s)

Abstract

Architected materials can exhibit mechanical properties that do not occur with ordinary solids. By integrating hierarchy and size effects, microarchitected metamaterials fabricated by two-photon lithography with a metallic or ceramic coating can be ultrastrong but lightweight. However, the attainment of both strength and ductility is generally mutually exclusive. Inspired by the Pantheon dome in Rome, which can withstand high load while keeping low density, microarchitected domes with a gradient helix are designed and deposited in a hierarchical nanostructured aluminum film with ultrahigh strength and considerable plasticity. Despite having a thick coating, which usually causes catastrophic collapse, the thick-walled metallic dome shows recoverability during compression. The compressive strength increases to 73 times that of current ductile-like microlattices, leading to the metamaterial occupying the domain of the material property space that is hitherto empty. Detailed in situ experimental and computational work reveals the graceful (noncatastrophic) failure due to the helical twisting and plastic flow in the supra-nanomaterial. It is a promising method of suppressing brittle failure via a combination of architectural and material design. It can be used to impart enhanced functionality, making programmable stiffness, and tailored energy absorption all possible.

Research Area(s)

  • ductile-like deformation, hierarchical materials, mechanical metamaterials, microarchitecture

Citation Format(s)

The Twisting of Dome-Like Metamaterial from Brittle to Ductile. / Cheng, Lizi; Tang, Tao; Yang, Haokun; Hao, Fengqian; Wu, Ge; Lyu, Fucong; Bu, Yu; Zhao, Yilu; Zhao, Yan; Liu, Guo; Cheng, Xuan; Lu, Jian.

In: Advanced Science, Vol. 8, No. 13, 2002701, 07.07.2021.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

Download Statistics

No data available