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Title: Modelling the Shock Response of Polycrystals at the Mesoscale

Abstract

Simulation of the shock compression of a copper polycrystal at the mesoscale has been carried out using a Discrete Element code. Grains were aligned in three crystal orientations with respect to the shock direction; <100>, <110>, and <111>. The polycrystal had an average grain diameter of 14{mu}m and was impacted by a single crystal of copper at 200m/s. Results show the presence of a Particle Velocity Dispersion which attains its maximum magnitude of 8m/s at the plastic wave rise, and which is quantitatively of the same order as experimentally observed values. Non-planar elastic and plastic wave fronts are present. The shock front position distribution increases with propagation distance until its standard deviation is 0.4{mu}m at a propagation distance of 80{mu}m.

Authors:
 [1];  [2]
  1. Atomic Weapons Establishment, Reading, UK, RG74PR (United Kingdom)
  2. Air Force Materials Laboratory, Eglin Air Base, Florida (United States)
Publication Date:
OSTI Identifier:
20875729
Resource Type:
Journal Article
Journal Name:
AIP Conference Proceedings
Additional Journal Information:
Journal Volume: 845; Journal Issue: 1; Conference: American Physical Society Topical Group conference on shock compression of condensed matter, Baltimore, MD (United States), 31 Jul - 5 Aug 2005; Other Information: DOI: 10.1063/1.2263323; (c) 2006 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0094-243X
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; COMPRESSION; COMPUTERIZED SIMULATION; COPPER; CRYSTAL STRUCTURE; DISTANCE; DISTRIBUTION; MONOCRYSTALS; ORIENTATION; PLASTICS; POLYCRYSTALS; PRESSURE DEPENDENCE; SHOCK WAVES; VELOCITY

Citation Formats

Case, Simon, and Horie, Yuki. Modelling the Shock Response of Polycrystals at the Mesoscale. United States: N. p., 2006. Web. doi:10.1063/1.2263323.
Case, Simon, & Horie, Yuki. Modelling the Shock Response of Polycrystals at the Mesoscale. United States. https://doi.org/10.1063/1.2263323
Case, Simon, and Horie, Yuki. 2006. "Modelling the Shock Response of Polycrystals at the Mesoscale". United States. https://doi.org/10.1063/1.2263323.
@article{osti_20875729,
title = {Modelling the Shock Response of Polycrystals at the Mesoscale},
author = {Case, Simon and Horie, Yuki},
abstractNote = {Simulation of the shock compression of a copper polycrystal at the mesoscale has been carried out using a Discrete Element code. Grains were aligned in three crystal orientations with respect to the shock direction; <100>, <110>, and <111>. The polycrystal had an average grain diameter of 14{mu}m and was impacted by a single crystal of copper at 200m/s. Results show the presence of a Particle Velocity Dispersion which attains its maximum magnitude of 8m/s at the plastic wave rise, and which is quantitatively of the same order as experimentally observed values. Non-planar elastic and plastic wave fronts are present. The shock front position distribution increases with propagation distance until its standard deviation is 0.4{mu}m at a propagation distance of 80{mu}m.},
doi = {10.1063/1.2263323},
url = {https://www.osti.gov/biblio/20875729}, journal = {AIP Conference Proceedings},
issn = {0094-243X},
number = 1,
volume = 845,
place = {United States},
year = {Fri Jul 28 00:00:00 EDT 2006},
month = {Fri Jul 28 00:00:00 EDT 2006}
}