About this Abstract |
Meeting |
2022 TMS Annual Meeting & Exhibition
|
Symposium
|
Dynamic Behavior of Materials IX
|
Presentation Title |
G-23: Shock-driven Foamed Metals for Studying Shallow Bubble Collapse |
Author(s) |
Eric Stallcup, Garry Maskaly, Fady Najjar, Gerald Stevens, William Turley, Brandon La Lone, Matthew Staska |
On-Site Speaker (Planned) |
Eric Stallcup |
Abstract Scope |
Study of shock-driven ejecta has historically focused on Richtmeyer-Meshkov instability (RMI) growth as the primary mechanism, but a fundamentally different method, termed Shallow Bubble Collapse (SBC), has recently been established. If a material is shocked multiple times, SBC describes the process by which the release after first shock forms cavitation bubbles directly beneath the surface, and the second shock collapses these bubbles. This releases significantly more ejecta than that described by RMI. In this work, we isolate the cavitation bubble collapse and ejecta release process by shocking a porous aluminum foam with a strong single shock. This simplified problem allows for more control over the shock conditions and access to additional diagnostics during experimentation. We compare results with differences in pore size, morphology, and pore fraction. These experiments, supported by numerical simulation, have shown this method accurately reproduces the physical processes taking place in SBC, therefore enabling faster model development. |
Proceedings Inclusion? |
Planned: |
Keywords |
Modeling and Simulation, Phase Transformations, Other |