High strain rate deformation of layered nanocomposites

Jae Hwang Lee, David Veysset, Jonathan Singer, Markus Retsch, Gagan Saini, Thomas Pezeril, Keith A. Nelson, Edwin L. Thomas

Research output: Contribution to journalArticlepeer-review

88 Scopus citations

Abstract

Insight into the mechanical behaviour of nanomaterials under the extreme condition of very high deformation rates and to very large strains is needed to provide improved understanding for the development of new protective materials. Applications include protection against bullets for body armour, micrometeorites for satellites, and high-speed particle impact for jet engine turbine blades. Here we use a microscopic ballistic test to report the responses of periodic glassy-rubbery layered block-copolymer nanostructures to impact from hypervelocity micron-sized silica spheres. Entire deformation fields are experimentally visualized at an exceptionally high resolution (below 10 nm) and we discover how the microstructure dissipates the impact energy via layer kinking, layer compression, extreme chain conformational flattening, domain fragmentation and segmental mixing to form a liquid phase. Orientation-dependent experiments show that the dissipation can be enhanced by 30% by proper orientation of the layers.

Original languageEnglish (US)
Article number1164
JournalNature communications
Volume3
DOIs
StatePublished - Nov 26 2012
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Biochemistry, Genetics and Molecular Biology(all)
  • Physics and Astronomy(all)

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