Simulations and experiments of dynamic granular compaction in non-ideal geometries

Michael A. Homel, Eric B. Herbold, Jonathan Lind, Darren Pagan, Ryan Crum, Ryan Hurley, Minta Akin

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Accurately describing the dynamic compaction of granular materials is a persistent challenge in computational mechanics. Using a synchrotron x-ray source we have obtained detailed imaging of the evolving compaction front in synthetic olivine powder impacted at 300-600 m s-1. To facilitate imaging, a non-traditional sample geometry is used, producing multiple load paths within the sample. We demonstrate that (i) commonly used models for porous compaction may produce inaccurate results for complex loading, even if the 1-D, uniaxial-strain compaction response is reasonable, and (ii) the experimental results can be used along with simulations to determine parameters for sophisticated constitutive models that more accurately describe the strength, softening, bulking, and poroelastic response. Effects of experimental geometry and alternative configurations are discussed. Our understanding of the material response is further enhanced using mesoscale simulations that allow us to relate the mechanisms of grain fracture, contact, and comminution to the macroscale continuum response. Numerical considerations in both continuum and mesoscale simulations are described.

Original languageEnglish (US)
Title of host publicationShock Compression of Condensed Matter - 2017
Subtitle of host publicationProceedings of the Conference of the American Physical Society Topical Group on Shock Compression of Condensed Matter
EditorsMarcus D. Knudson, Eric N. Brown, Ricky Chau, Timothy C. Germann, J. Matthew D. Lane, Jon H. Eggert
PublisherAmerican Institute of Physics Inc.
ISBN (Electronic)9780735416932
DOIs
StatePublished - Jul 3 2018
Event20th Biennial American Physical Society Conference on Shock Compression of Condensed Matter, SCCM 2017 - St. Louis, United States
Duration: Jul 9 2017Jul 14 2017

Publication series

NameAIP Conference Proceedings
Volume1979
ISSN (Print)0094-243X
ISSN (Electronic)1551-7616

Other

Other20th Biennial American Physical Society Conference on Shock Compression of Condensed Matter, SCCM 2017
CountryUnited States
CitySt. Louis
Period7/9/177/14/17

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

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