2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/18537The uniaxial elastic-plastic deformation process is considered. Mathematical model of this process was built. According to this model all stable static states form the lattice, which is called the delta-lattice.6 pages, 6 figures, 2 referencesMaterials ScienceAn application of the catastrophe theory to building the model of elastic-plastic behaviour of materials. An application of the catastrophe theory to building the model of elastic-plastic behaviour of materials. Part 1. Uniaxial deformation (stress)text