Abstract
A plasticity criterion is proposed for powdered materials to account for the local character of slip and plastic deformation of the particles. The degree of localization of the contact interaction between the particles is quantitatively evaluated by using the relative fraction of the active volume, after M. Yu. Balshin. Good agreement is obtained between the theoretical and experimental data in describing of the process of the isostatic pressing of spherical powders of lead and tin. The effect of the density of the material and pressure on the form of the yield surface and the character of the volume deformation is examined. A method is presented for determination of the empirical parameters of the plasticity criterion. These parameters are evaluated for sand.
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Translated from Poroshkovaya Metallurgiya, Nos. 3–4(412), pp. 4–10, March–April, 2000.
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Amosov, A.P., Fedotov, A.F. Variant of the plasticity condition for powdered solids. Powder Metall Met Ceram 39, 116–121 (2000). https://doi.org/10.1007/BF02678631
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DOI: https://doi.org/10.1007/BF02678631