| About this Abstract |
| Meeting |
2020 TMS Annual Meeting & Exhibition
|
| Symposium
|
Understanding and Predicting Dynamic Behavior of Materials
|
| Presentation Title |
Meso-scale Topology Effects on the Shock Compression Response of Reactive Powder Mixtures |
| Author(s) |
Manny Gonzales, Lauren L. Poole, Austin Gerlt, Zachary Cordero |
| On-Site Speaker (Planned) |
Manny Gonzales |
| Abstract Scope |
Dynamic loading conditions are fascinating since unique thermodynamic states are achieved extremely rapidly. Heterogeneous materials in particular can behave quite differently under shock compression in contrast with quasi-static loading. Waves propagate information under extreme dynamic loading events, and the local microstructure can be a major determinant of subsequent behavior. The matter is further complicated by the lack of both spatial and time-resolved measurements of the dynamic event, although major advancements have been made with synchrotron-based phase contrast imaging. This talk presents current efforts at AFRL to address how meso-level heterogeneity can affect bulk dynamic response. Two-point correlation functions and their evolution during shock compression are presented for reactive powder mixtures, and the role that microstructural topology plays on bulk shock response is explored. Mechanical dissipation and its relation to meso-scale wave mechanics is probed with microstructure-based hydrocode simulations. |
| Proceedings Inclusion? |
Undecided |