Mechanism of amplification of convergent shock waves in porous media |
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| Authors: | K. V. Khishchenko A. A. Charakhch’yan V. V. Milyavskii V. E. Fortov A. A. Frolova L. V. Shurshalov |
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| Affiliation: | (1) Institute of Thermal Physics of Extreme States of the Joint Institute for High Temperatures, Russian Academy of Sciences, Moscow, 125412, Russia;(2) Dorodnicyn Computing Center, Russian Academy of Sciences, Moscow, 119991, Russia |
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| Abstract: | The effect of amplification of moderate-intensity converging shock waves in porous media with decreasing initial density, revealed by numerically solving the hydrodynamics equations, was demonstrated for ID converging waves and for a 2D problem of the compression of porous material in conical solid targets. The latter problem was also treated within the framework of the simplest model of dynamic deformation of solids, with consideration given to shear stresses. The calculation results for porous graphite, aluminum, and Teflon samples are presented. Both closed targets and targets with an outlet orifice were considered. When modeling the intense shock loading of graphite, its transformation into diamond was taken into account. |
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