Elucidation of the dynamics for hot-spot initiation at nonuniform interfaces of highly shocked materials
Abstract
The fundamental processes in shock-induced instabilities of materials remain obscure, particularly for detonation of energetic materials. We simulated these processes at the atomic scale on a realistic model of a polymer-bonded explosive (3,695,375 atoms/cell) and observed that a hot spot forms at the nonuniform interface, arising from shear relaxation that results in shear along the interface that leads to a large temperature increase that persists long after the shock front has passed the interface. For energetic materials this temperature increase is coupled to chemical reactions that lead to detonation. We show that decreasing the density of the binder eliminates the hot spot.
Additional Information
© 2011 American Physical Society. Received 9 August 2011; revised manuscript received 3 October 2011; published 7 December 2011. All computations were carried out on the Army HPC systems; we thank Betsy Rice and Larry Davis for assistance. Personnel were supported by ARO (W911NF-05-1-0345 and W911NF-08-1-0124) and by ONR (N00014-09-1-0634).Attached Files
Published - An2011p16649Phys_Rev_B.pdf
Supplemental Material - README.TXT
Supplemental Material - SI_PRB-RC-Shock-Hot-Spot-final.docx
Supplemental Material - SI_PRB-RC-Shock-Hot-Spot-final.pdf
Files
Additional details
- Eprint ID
- 28616
- Resolver ID
- CaltechAUTHORS:20120103-131534583
- W911NF-05-1-0345
- Army Research Office (ARO)
- W911NF-08-1-0124
- Army Research Office (ARO)
- N00014-09-1-0634
- Office of Naval Research (ONR)
- Created
-
2012-01-04Created from EPrint's datestamp field
- Updated
-
2021-11-09Created from EPrint's last_modified field
- Other Numbering System Name
- WAG
- Other Numbering System Identifier
- 0951