Bulletin of the American Physical Society
22nd Biennial Conference of the APS Topical Group on Shock Compression of Condensed Matter
Volume 67, Number 8
Monday–Friday, July 11–15, 2022; Anaheim, California
Session T01: Grain Scale-to Continuum Modeling of Explosives
9:15 AM–10:15 AM,
Thursday, July 14, 2022
Anaheim Marriott
Room: Platinum 5
Chair: Michael Sakano, Sandia National Laboratories
Abstract: T01.00004 : Surrogate hot-spot models for high-fidelity simulations of detonation in energetic materials*
10:00 AM–10:15 AM
Presenter:
Marisol Koslowski
(Purdue University)
Authors:
Marisol Koslowski
(Purdue University)
Camilo A Duarte
(Columbia University)
Congxi Yuan
(Purdue University)
The length scales associated with the processes at the microstructure level range from nanometers to micrometers. However, typical run to detonation distances are observed at the millimeter scale. We developed surrogate hot-spot models that are used in shock simulations to understand the effect of microstructure on detonation. These surrogate models predict the local temperature and pressure and are informed from atomistic and mesoscale simulations that include, plastic deformation, friction, jetting, and recompression. Interestingly, some of these models present scaling behavior from nanometers to micrometers. We present finite element simulations of shock compression with parametric studies of defect density and distribution to observe their relationship to the detonation wave velocity, and run to detonation distance. Furthermore, the influence of the shock wave on the initiation reaction site and the shape of the shock front are explored.
*This work was supported by the US Department of Defense, Office of Naval Research, MURI contract number N00014-16-1-2557, program managers: Kenny Lipkowitz and Chad Stoltz.
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