We compare the dislocation model with a new discrete model of plasticity. According to the previously proposed model, a crystal lattice with spherically symmetric potential of interatomic interaction is unstable under shear stresses in the internal regions of the crystal. The surface layers preserve the unstable crystal lattice, which creates the state of unstable equilibrium in the crystal. As an important feature of the proposed model, we can mention the fact that the shift of atomic planes in the crystal occurs under low stresses in the absence of any defects, including dislocations. We also describe the advantages of the proposed model as compared with the dislocation model discovered in the course of analysis of the available experimental data.
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Translated from Fizyko-Khimichna Mekhanika Materialiv, Vol. 55, No. 4, pp. 7–14, July–August, 2019.
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Kozak, L.Y. New Discrete Model of Plastic Deformation of Solid Bodies. Mater Sci 55, 461–468 (2020). https://doi.org/10.1007/s11003-020-00326-z
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DOI: https://doi.org/10.1007/s11003-020-00326-z