Ejecta production from shocked Pb surface via molecular dynamics
GW Ren and YT Chen and TG Tang and QZ Li, JOURNAL OF APPLIED PHYSICS, 116, 133507 (2014).
Molecular dynamics simulations are employed to examine the relation between ejecta production and shock-breakout pressure for single crystal Pb subjected to a decaying shockwave loading. To better understand the physical mechanism of ejecta formation, a surface with multiple triangular grooves representing the imperfections left from machining finish is taken into consideration. It is found that the ejecta volume density distribution displays a smooth nature and the amount of ejecta increases significantly after melting on release or shock. Additionally, the ejecta particle mass distribution is captured by a power law scaling, revealing the self-similarity. These results are in reasonable agreement with the characteristics of experimentally diagnosed findings. (C) 2014 AIP Publishing LLC.
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