About this Abstract |
Meeting |
2022 TMS Annual Meeting & Exhibition
|
Symposium
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Dynamic Behavior of Materials IX
|
Presentation Title |
Energy Localization during the Shock Compression of Nanoscale Plastically Bonded Explosives from All-atom Simulations |
Author(s) |
Brenden W. Hamilton, Tongtong Shen, Michael Sakano, Lorena Alzate-Vargas, Chunyu Li, Alejandro Strachan |
On-Site Speaker (Planned) |
Brenden W. Hamilton |
Abstract Scope |
The role of materials microstructure in localizing and dissipating shockwave energy is critical to understanding phenomena such as the transition from shock to detonation, shockwave attenuation, and materials failure. However, atomic scale calculations, which can provide significant insight into materials evolution under dynamic loading, have mainly focused on idealized structures such as single crystals with geometrically idealized defects such as cylindrical voids. Therefore, we develop a systematic workflow for generating all-atom, pseudo-2D simulation cells of plastically bonded explosives. Materials properties of the HE crystal, coupled with Monte Carlo techniques, are utilized to generate physically realistic structures, but at significantly reduced length scales. Using a system with a variety of microstructural defects, features, and crystallographic orientations, we run shock simulations to analyze the spatial localization of temperature and strain, as well as the evolution of the wave structure and speed. Temperature fields and shockwave evolution are mapped to initial microstructural features. |
Proceedings Inclusion? |
Planned: |
Keywords |
Computational Materials Science & Engineering, Mechanical Properties, Modeling and Simulation |