Abstract
The experimental and theoretical investigation of the granular medium shock-wave compaction process is made. The striker acceleration in the experiments is realized by pulsed magnetic field force action. The granular medium is alumina nanopowder. The mathematical model of the process describes the energy dissipation, which is stipulated by the work made to compact the powder, considering the loss for the non-ideal reflection of the shock wave from the discontinuity surfaces on the borders of the body being compacted. There is a satisfactory fit of the theoretical calculations and the final compact’s density experimental data. In terms of the low-energy shock front approximation the problem of the time dynamics calculation of the granular medium state is narrowed down to the system of ordinary non-linear differential equations. The limitation the striker to low energies linearizes the system, allowing to take its rigorous solution. The influence of such parameters as starting voltage of the capacitor, powder and striker masses and wave resistances of contacting materials on the compaction process is analyzed.
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Boltachev, G.S., Volkov, N.B., Ivanov, V.V. et al. Shock-wave compaction of the granular medium initiated by magnetically pulsed accelerated striker. Acta Mech 204, 37–50 (2009). https://doi.org/10.1007/s00707-008-0046-2
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DOI: https://doi.org/10.1007/s00707-008-0046-2