1. Introduction to elastoplasticity

1.1 Rheological model

In the uni-axial tensile analysis, we have seen that total deformation is the sum of reversible elastic deformation and irreversible plastic deformation (24) of the [42] file.

This situation is illustrated in figure 1 by a rheological model in which a spring provides the elastic component and a sliding pad (when a stress threshold is reached) the plastic deformation.

Note that if, in this analogical model, the total strain is, at each instant, the sum of an elastic strain and a plastic strain, the total strain rate is also, at each instant, the sum of...