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 Y02: Characterization of Reactive and Energetic Materials I
9:15 AM–10:45 AM,
Friday, July 15, 2022
Anaheim Marriott
Room: Platinum 6
Chair: Alexandra Reinert, NSWC Crane
Abstract: Y02.00005 : Effect of pore morphology and multiple hotspot formation mechanisms in high energetic materials*
10:15 AM–10:30 AM
Presenter:
Chunyu Li
(Purdue University)
Authors:
Chunyu Li
(Purdue University)
Alejandro H Strachan
(Purdue University)
Recently, we conducted a series of large-scale atomistic simulations on the collapse of pore with high aspect ratios under shock condition. We find that multiple hotspot formation mechanisms coexist for this kind of pores. The hotspot formation mechanism also depends on shock strength. Under the shock condition of particle velocity over 750 m/s, there are three main hotspot formation mechanisms, i.e., zipping of pore boundaries, recompression of a molecule jet, and impact of molecule on downstream void surface. If the particle velocity below 750 m/s, the mechanisms reduce to shear band or shear band accompanied with zipping of pore boundaries. Another important finding is that the molecule jet is accelerated inside the void and the acceleration rate as well as the maximum molecule velocity, as well as resulted hotspot temperature, are strongly depending on both pore curvature and aspect ratio.
*This work was supported by the US Office of Naval Research, Multidisciplinary University Research Initiatives (MURI) Program, Contract N00014-16-1-2557, program managers Chad Stoltz.
Follow Us |
Engage
Become an APS Member |
My APS
Renew Membership |
Information for |
About APSThe American Physical Society (APS) is a non-profit membership organization working to advance the knowledge of physics. |
© 2024 American Physical Society
| All rights reserved | Terms of Use
| Contact Us
Headquarters
1 Physics Ellipse, College Park, MD 20740-3844
(301) 209-3200
Editorial Office
100 Motor Pkwy, Suite 110, Hauppauge, NY 11788
(631) 591-4000
Office of Public Affairs
529 14th St NW, Suite 1050, Washington, D.C. 20045-2001
(202) 662-8700