@inproceedings{d834270c0cec44588f6752fd7de9fd09,
title = "Simulations and experiments of dynamic granular compaction in non-ideal geometries",
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.",
author = "Homel, {Michael A.} and Herbold, {Eric B.} and Jonathan Lind and Darren Pagan and Ryan Crum and Ryan Hurley and Minta Akin",
note = "Funding Information: This work was performed under the auspices of the U.S. Department of Energy by Lawrence Livermore National Laboratory under Contract DE-AC52-07NA27344 and was supported by LLNL Laboratory Directed R&D Program (tracking no. 16-ERD-010). The experiment was performed at the Advanced Photon Source (APS), a U.S. Department of Energy (DOE) Office of Science User Facility operated for the DOE Office of Science by Argonne National Laboratory under Contract No. DE-AC02-06CH11357. The Dynamic Compression Sector at APS (sector 35) is supported by the Department of Energy/National Nuclear Security Administration, under Award Number DE-NA000242. This work was aided by LANLs MaRIE and Science Campaign programs and National Security Technologies (NSTec) Shock Wave Physics Related Diagnostics (SWRD) program. LANL is operated by Los Alamos National Security, LLC for the U.S. Department of Energy (DOE) under Contract No. DE-AC52-06NA25396. Many thanks to our collaborators and support staff: Brian Jensen, Adam Iverson, Nick Sinclair, Mukul Kumar, Paulo Rigg, Kamel Fezzaa, Joel Bernier, Tim Uphaus, Bob Nafzinger, Paul Benevento, Jeff Klug, Yuelin Lin, Adam Schuman, Xiaoming Wang, Brendan Williams. This work was performed under the auspices of the U.S. Department of Energy by Lawrence Livermore National Laboratory under Contract DE-AC52-07NA27344. LDRD#16-ERD-010. LLNL-CONF-892020. Publisher Copyright: {\textcopyright} 2018 Author(s).; 20th Biennial American Physical Society Conference on Shock Compression of Condensed Matter, SCCM 2017 ; Conference date: 09-07-2017 Through 14-07-2017",
year = "2018",
month = jul,
day = "3",
doi = "10.1063/1.5045037",
language = "English (US)",
series = "AIP Conference Proceedings",
publisher = "American Institute of Physics Inc.",
editor = "Knudson, {Marcus D.} and Brown, {Eric N.} and Ricky Chau and Germann, {Timothy C.} and Lane, {J. Matthew D.} and Eggert, {Jon H.}",
booktitle = "Shock Compression of Condensed Matter - 2017",
}