J. Phys. IV France 10 (2000) Pr9-27-Pr9-32
Viscoelastoplastic thermomechanical constitutive patterns at high rates of strainG. Bles1, W.K. Nowacki2 and A. Tourabi1
1 Laboratoire 3S, Domaine Universitaire, BP. 53, 38041 Grenoble cedex 9, France
2 Center of Mechanics and Information Technology, IPPT-PAN, ul. Swietokrzyska 21, 00-049 Warsaw, Poland
A phenomenological tensorial pattern has been proposed to describe several thermomechanical behaviours of various materials [1-3]. The study presented here aims at checking whether the theory is effective in modelling the thermomechanical features of the cyclic viscoelastoplastic behaviour of metallic materials at high rates of strain. Several types of numerical illustrations of the cyclic behaviour including relaxation and creep are proposed ; in order to suggest qualitatively that with the unique proposed pattern, it is possible to take into account a cyclic behaviour at low strain rate as well as at high strain rate.
© EDP Sciences 2000