On the different nature of time-dependent and time-independent irreversible deformation

Several current models for elastoviscoplasticity use irreversible deformations without dividing them into time-dependent and time-independent components. This article presents experimental data on the difference in the mode of deformation and in the fracture conditions compared to the actual values. General functional dependences are proposed for the description of the dependence of the material characteristics from the conditions of exposure to high temperature. The interference of creep deformation and momentary deformation in conditions of static and cyclic deformations is investigated. A method is proposed for summing the irreversible deformations, taking into account their difference in nature.