The authors, using elastic-plastic hydrodynamic code, present the Rayleigh-Taylor (RT) instability of Al plates driven by high-explosive detonation. Our numerical study assumes the material is fluid, or it is an elastic-plastic solid, and we compare the results of these simulations with the experimental data. For the numerical simulation of Rayleigh-Taylor instability of the metal driven by high-explosive detonation, the elastic-plastic effect must be assumed. The result of the simulation is different from the experiment, using only equation of state. However, the growth of perturbation agrees well with the measured growth under the second assumption. There is a cutoff wavelength for RT instability of the metal. The growth of perturbation is stable for short wavelength. The growth increases rapidly as the wavelength increases.interface instability, elastic-plastic, numerical simulation
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