THE FRAGMENTATION STATISTICS OF DUCTILE METALS AND THEIR SHEAR BANDS EVOLUTION

E. HIRSCH

doi:doi:10.1051/jp4:19913110

Numéro		J. Phys. IV France Volume 01, Numéro C3, Octobre 1991 DYMAT 1991 - 3rd International Conference on Mechanical and Physical Behaviour of Materials under Dynamic Loading


Page(s)		C3-781 - C3-784
DOI		https://doi.org/10.1051/jp4:19913110

DYMAT 1991 - 3rd International Conference on Mechanical and Physical Behaviour of Materials under Dynamic Loading

J. Phys. IV France 01 (1991) C3-781-C3-784
DOI: 10.1051/jp4:19913110

THE FRAGMENTATION STATISTICS OF DUCTILE METALS AND THEIR SHEAR BANDS EVOLUTION

E. HIRSCH

Israel Military Industries, P.O. Box, 1044 Ramat Hasharon, 47100, Israel

Résumé
On monte comment le frottement latéral de bandes de cisaillement contigües est à l'origine du mécanisme qui contrôle l'évolution de la déformation plastique, en état de traction. La vitesse de propagation V_p2 est le paramètre qui gouverne la fragmentation ductile ; la localisation qui conduit à cette fragmentation se révèle comme résultant des variations statistiques de la contrainte d'écoulement associées au mécanisme de frottement.

Abstract
The friction between the sides of shear bands is shown to be the source of the mechanism by which plastic deformation propagates under tensile force. The velocity of propagation, V_p1, is the material parameter which controls ductile fragmentation. The localization leading to this fragmentation is shown to result from the statistical variations of the yield strength associated with this friction mechanism.