Finite element analysis of mechanical stability of coarsened nanoporous gold

Hoon Hwe Cho, Yu Chen Karen Chen-Wiegart, David C. Dunand*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

9 Scopus citations

Abstract

The mechanical stability of nanoporous gold (np-Au) at various stages of thermal coarsening is studied via finite element analysis under volumetric compression using np-Au architectures imaged via X-ray nano-tomography. As the np-Au is coarsened thermally over ligament sizes ranging from 185 to 465 nm, the pore volume fraction is determinant for the mechanical stability of the coarsened np-Au, unlike the curvature and surface orientation of the ligaments. The computed Young's modulus and yield strength of the structures are compared with the Gibson-Ashby model. The geometry of the structures determines the locations where stress concentrations occur at the onset of yielding.

Original languageEnglish (US)
Pages (from-to)96-99
Number of pages4
JournalScripta Materialia
Volume115
DOIs
StatePublished - Apr 1 2016

Keywords

  • Coarsened nanoporous gold
  • Finite element (FE) analysis
  • Mechanical stability
  • Surface characteristics
  • Volume fraction

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys

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