Compression and buckling of microarchitectured Neovius-lattice

Diab W. Abueidda, Mohamed Elhebeary, Cheng Shen (Andrew) Shiang, Rashid K. Abu Al-Rub, Iwona M. Jasiuk

Research output: Contribution to journalArticlepeer-review

Abstract

New materials with enhanced properties are of high scientific and industrial interests. Microarchitectured cellular materials possess robust mechanical properties such as high strength-to-weight ratios due to their architectures and size effect appearing in metals and ceramics. In this study, we investigate the mechanical properties of a novel microlattice based on the Neovius surface, a member of the triply periodic minimal surfaces. We show that the Neovius-microlattice exhibits high uniaxial modulus, energy absorption, and strength due to its architecture, which is free of self-intersecting elements. The polymeric Neovius-microlattice deforms locally by two mechanisms: buckling and plastic yielding, while the brittle fracture is not observed. Also, we show that the mechanical properties of the Neovius-microlattice can be enhanced further by coating it with a ceramic (alumina) layer. Additionally, the nature of instability in these architectured materials (at the micro-scale, microns in dimensions) is explored through experiments and computational modeling. The two primary instability mechanisms, out-of-plane and in-plane buckling, in cellular materials, are distinguished. Such a study can pave the path for designing cellular materials that are stiff, strong, light, and buckling-resistant.

Original languageEnglish (US)
Article number100688
JournalExtreme Mechanics Letters
Volume37
DOIs
StatePublished - May 2020

Keywords

  • Coating
  • In-plane and out-of-plane buckling
  • Microlattice
  • Size effect
  • Triply periodic minimal surfaces
  • Two-photon polymerization

ASJC Scopus subject areas

  • Bioengineering
  • Chemical Engineering (miscellaneous)
  • Engineering (miscellaneous)
  • Mechanics of Materials
  • Mechanical Engineering

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