Center for Simulation of Dynamic Response of Materials

Validation

Validation plays a very integral role in the proposed scientific program. We have designed as part of our ASC program a set of experiments in the areas of compressible turbulence, detonation, and solid dynamics that examine key phenomena of interest to the larger DP lab ASC program. In addition, each of our end-to-end integrated simulations is tied to an experiment aimed at validating the entire simulation. At the end of FY07 it is our plan to have a validated simulation capability for each of the experiments described below. The experiments that are currently being designed are described below:

Richtmyer-Meshkov instability in converging geometry - These experiments validate our integrated simulation of Richtmyer-Meshkov instability in converging geometries. They are meant to demonstrate a methodology for the generation of 2-D and 3-D converging shocks and shock focusing. We will also facilitate understanding of the stability of converging shocks through these experiments.

Detonation-driven fracture - These experiments will test the ability of the VTF to simulate stress waves in thin shells, dynamic fracture. The experiments are designed to explore crack bifurcation, detonation waves in gases, and shock waves in the surrounding air.

Impact dynamics of single and polycrystals - The output of these impact experiments will be the microstructural characterization of single and polycrystals deformed at various strain rates and temperatures to varying levels of strain. These in turn will provide validation for the atomistic and quasi-continuum models that are essential to our program for multiscale modeling of solids.

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