Fracture in nanoporous gold: An integrated computational and experimental study

Nathan Beets, Joshua Stuckner, Mitsuhiro Murayama, Diana Farkas

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

We present simulation/experimental integrated study examining crack propagation in nanoporous gold. We utilized a simulation technique that combines continuum fracture mechanics with molecular dynamics. We applied this to a large atomistic digital sample of nanoporous gold to implement mode-1 crack propagation. Crack propagation tests were also conducted on an experimental sample, prepared via chemical dealloying and observed via in-situ TEM microscopy. We observed cracks in both samples propagating by the same mechanisms of sequential individual ligament failure. A series of nanowire computational deformation tests were also conducted to understand individual ligament behavior, and how this influences the overall sample fracture. This iterative direct experiment/simulation comparison provides new insight into the failure response of nanoporous gold.

Original languageEnglish
Pages (from-to)257-270
Number of pages14
JournalActa Materialia
Volume185
DOIs
Publication statusPublished - Feb 15 2020
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Ceramics and Composites
  • Polymers and Plastics
  • Metals and Alloys

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