The method of granular dynamics is used to study the quasistatic uniaxial compaction of nanopowders with a particle size from 10 nm to several hundred nanometers. The interaction of individual particles includes Hertz elastic forces, Cattaneo–Mindlin friction forces, and van der Waals dispersion forces of attraction. The influence of the model cell size on simulation results is analyzed. The curves of uniaxial compression and elastic unloading in the “axial pressure–density” coordinates are plotted. The generalization of the traditional Hertz law in the range of relatively high strains is discussed.
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Acknowledgements
The study was supported by the Russian Fundamental Support Fund (Projects 09-08-00198 and 12-08-00298) under the “Fundamental Problems of Nonlinear Dynamics” Program (Project 09-P-2-1003), Presidium of the Russian Academy of Sciences.
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Translated from Poroshkovaya Metallurgiya, Vol. 51, No. 5–6 (485), pp. 12–21, 2012.
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Boltachev, G.S., Volkov, N.B. Compaction and elastic unloading of nanopowders under the granular dynamic method. Powder Metall Met Ceram 51, 260–266 (2012). https://doi.org/10.1007/s11106-012-9426-1
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DOI: https://doi.org/10.1007/s11106-012-9426-1