Tout solide est un fluide qui s’ignore.
With this Chapter, we come to problems related to the temporal growth of permanent deformations, i.e., to the study of the perfectly viscoplastic, perfectly elastic viscoplastic, and hardening elastoviscoplastic solids, described schematically in Chapter 3.
The important dates in the development of the mathematical modelling of viscoplasticity are:
1910, with the representation of primary creep by Andrade’s law;
1929, with Norton’s law which links the rate of secondary creep to the stress;
1934, with Odqvist’s generalization of Norton’s law to the multi-axial case.
The first IUTAM Symposium ‘Creep in Structures’ organized by Hoff took place in 1960. It became the starting point of a great ...