Numéro
J. Phys. Colloques
Volume 49, Numéro C3, Septembre 1988
DYMAT 88 - 2nd International Conference on Mechanical and Physical Behaviour of Materials under Dynamic Loading
Page(s) C3-457 - C3-466
DOI https://doi.org/10.1051/jphyscol:1988365
DYMAT 88 - 2nd International Conference on Mechanical and Physical Behaviour of Materials under Dynamic Loading

J. Phys. Colloques 49 (1988) C3-457-C3-466

DOI: 10.1051/jphyscol:1988365

RELATION OF DISLOCATION KINETICS WITH DYNAMIC CHARACTERISTICS IN MODELLING MECHANICAL BEHAVIOUR OF MATERIALS

L.A. MERZHIEVSKY and A.V. TYAGEL'SKY

Lavrentyev Institute of Hydrodynamics, Siberian Division of the USSR Academy of Sciences, Novosibirsk 630090, USSR


Résumé
On a analysé la capacité des modèles bien connus de cinétique des dislocations à décrire les processus de déformation dynamique des métaux. On a obtenu des équations cinétiques qui rendent possible la modélisation du comportement de matériaux écrouis ou adoucis par la déformation. On a étudié numériquement l'effet de l'écrouissage sur la contrainte d'écoulement en arrière du front d'une onde de choc plane.


Abstract
The suitability of the well-known dislocaton kinetics for describing the processes of dynamical deformation of metals is analyzed. The kinetics have been obtained which make it possible to model the behaviour of strengthened and softened materials under deformation. The strengthening effect of flow stress behind the front of a plane shock wave has been investigated numerically.