TY  - JOUR
AU  - Kozak, Liubomyr
PY  - 2026
DA  - 2026/03/18
TI  - A New Model for the Shear of Atomic Planes
JO  - Recent Progress in Materials
SP  - 002
VL  - 08
IS  - 01
AB  - The article presents a model that describes the shear of atomic planes in crystalline solids by accounting for their electronic structure. Previous studies have shown that an isotropic distribution of valence electrons leads to a spherically symmetric interatomic potential, which affects the stability of the crystal lattice against small shear deformations. Under these conditions, lattice stability is largely determined by the crystal's surface layer. As a consequence, the resistance to atomic-plane shear exhibits pronounced size dependence: it is high in small crystals, approaching the theoretical limit, whereas in large crystals it is substantially reduced, becoming comparable to shear resistance values commonly associated with edge-dislocation-mediated deformation. Within this framework, plastic deformation in an ideal crystal lattice is interpreted as the collective motion of atoms toward lower-potential-energy positions. The proposed approach provides an alternative microscopic description of plasticity and is consistent with existing experimental observations and theoretical analyses. The model is intended as a conceptual description of cooperative atomic-plane shear and does not replace dislocation-based interpretations; rather, it complements them by emphasizing the roles of lattice stability and electronic structure.
SN  - 2689-5846
UR  - https://doi.org/10.21926/rpm.2601002
DO  - 10.21926/rpm.2601002
ID  - Kozak2026
ER  -