Dissipative and non dissipative phenomena during an elastoplastic deformation process

When a solid material is strained, its temperature hardly ever changes. The thermal effects, accompaning the deformation process, have been being observed for a long time by the experimentalists and still remain the subject of a large number of publications. This article depicts the thermomechanical behaviour of metallic elastoplastic materials at finite strain. Three materials, which are of common place use have been chosen: Duralumin (supercooling), carbon steel (agehardening), and stainless steel (agehardening). An experimental and theoretical methodology is introduced, which allows to control the thermomechanical validity of behaviour laws and to elaborate new and more appropriate laws. (orig./GL)