Conclusions
The volume strains of a sintered porous solid depend on the type of stressed state, loading history, and form of the deviatorμ σ and are functions of two invariants-the first invariant of the stress tensor I1σ and the second invariant of the stress deviator I'2σ. Good qualitative descriptions of these volume strains are provided by all the models examined in this paper. In quantitative assessments of volume changes preference should be given to the Martynova-Shtern model.
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Translated from Poroshkovaya Metallurgiya, No. 1(229), pp. 14–20, January, 1982.
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Rud', V.D., Midukov, V.Z. Experimental verification of plasticity hypotheses for porous solids. Powder Metall Met Ceram 21, 12–18 (1982). https://doi.org/10.1007/BF00791717
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DOI: https://doi.org/10.1007/BF00791717