Size-dependent rupture strain of elastically stretchable metal conductors

Oliver Graudejus, Zheng Jia, Teng Li, S. Wagner

Research output: Contribution to journalArticle

22 Scopus citations

Abstract

Experiments show that the rupture strain of gold conductors on elastomers decreases for conductors that are long and narrow. Rupture is caused by the irreversible coalescence of microcracks into one long crack. A mechanics model identifies a critical crack length ℓ cr above which the long crack propagates across the entire conductor width. ℓ cr depends on the fracture toughness of the gold film and the width of the conductor. The model provides guidance for the design of highly stretchable conductors.

Original languageEnglish (US)
Pages (from-to)919-922
Number of pages4
JournalScripta Materialia
Volume66
Issue number11
DOIs
StatePublished - Jun 1 2012

Keywords

  • Flexible electronics
  • Rupture strain
  • Stretchable conductors
  • Thin films

ASJC Scopus subject areas

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

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