About this Abstract |
Meeting |
2022 TMS Annual Meeting & Exhibition
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Symposium
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Dynamic Behavior of Materials IX
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Presentation Title |
High Strain Rate Atomistic and Mesoscale Simulations of Ejecta Jet Formation in Cu and Sn Systems: Probing Initial Conditions for Ejecta Jet Formation |
Author(s) |
Marco Echeverria, Sergey Galitskiy, Alison M. Saunders, Tomorr Haxhimali, Robert Rudd, Faddy Najjar, Avinash Dongare |
On-Site Speaker (Planned) |
Marco Echeverria |
Abstract Scope |
The detailed microphysics that entails the formation of ejecta jets is difficult to observe experimentally due to the small length- and time-scales inherent to the process. Material effects and slight variations on a material's free surface significantly affect jet properties. We carry out large-scale molecular dynamics and mesoscale simulations to understand the evolution of microstructure on the formation of ejecta jets due to the interaction of shock waves with surface perturbations in Cu and Sn. The loading conditions are chosen to generate shock pressures ranging from 16 GPa to 100 GPa. We demonstrate the effect of varying the crystal orientation and structure on the ejecta jet's morphology and properties (velocity, temperature, inner pressure). LLNL-ABS-824451. This work was performed under the auspices of the U.S. Department of Energy by Lawrence Livermore National Laboratory under Contract DE-AC52-07NA27344 and supported by Laboratory Directed Research and Development (LDRD) Grant No. 18-ERD-060. |
Proceedings Inclusion? |
Planned: |