| About this Abstract |
| Meeting |
2020 TMS Annual Meeting & Exhibition
|
| Symposium
|
Understanding and Predicting Dynamic Behavior of Materials
|
| Presentation Title |
Experiments and Modeling to Explore Dynamic Behavior of Materials via Kolsky Bar at Equilibrium and Beyond |
| Author(s) |
Benjamin M. Morrow, Francis L. Addessio, Christopher S. Meredith, Kyle J. Ramos, Cheng Liu, Carl M. Cady, Clarissa A. Yablinsky |
| On-Site Speaker (Planned) |
Benjamin M. Morrow |
| Abstract Scope |
Kolsky bar (or split-Hopkinson pressure bar, SHPB) is a commonly used technique to probe dynamic materials behavior at intermediate strain rates (on the order of 1000 /s). However, the technique relies on several key assumptions to achieve a “valid” test. In the present study, a miniaturized Kolsky bar setup was used to test RDX single crystals at higher rates than are usually achieved on a standard-sized setup. The increased rates, combined with brittle samples, push testing to the very edge of the equilibrium assumption, requiring advanced simulations to interpret results. Additional diagnostics, including high-speed imaging, help bridge gaps between measured strain gage signals and simulations. A comparison of experimental and computational results will be presented, along with a case study for using the synergy of simulation and experiment to enable more complex test setups than current convention. A discussion of experimental error for the miniaturized system will also be presented. |
| Proceedings Inclusion? |
Undecided |