| Autor: |
Sakano, Michael N., Kittell, David E., Marquez, Michael P., Tappan, Alexander S., Knepper, Robert |
| Předmět: |
|
| Zdroj: |
AIP Conference Proceedings; 2024, Vol. 3066 Issue 1, p1-11, 11p |
| Abstrakt: |
Vapor-deposited explosive films with variable substrate interfacial roughness were studied through combined detonation thickness experiments and 3D simulations using Sandia National Laboratories' hydrocode, CTH. Prior computational work assumed smooth interfaces in 2D and investigated the detonation velocity as a function of film thickness. However, lack of interfacial roughness and the 2D geometry limited the applicability for model comparisons with experiments, which show that non-ideal interfaces have a significant impact on the detonation behavior. The current computational effort leverages a novel capability in CTH for voxel-map import of an image stack, e.g., containing a 3D rendering of a non-ideal interface from analytical equations or a profilometer scan. Here, the effects of the roughness intensity between the vapor-deposited film and inert substrate are explored, and the results show how non-ideal 3D interfaces increase the failure thickness of an explosive film. Additionally, the shock front curvature is analyzed for each type of interface, and parallels are drawn to Detonation Shock Dynamics theory. Finally, the concept of transverse kinetic energy is proposed as a potential loss mechanism contributing to the detonation velocity deficit. Overall, this work analyzes the effects of individual contributions to the detonation velocity of unconfined vapor-deposited explosives, and it proposes a mechanism to explain the observed behaviors that have so far remained elusive to model. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
|
