INFLUENCE OF SHOCK-INDUCED POLYMORPHIC TRANSITION ON PENETRATION IN STEEL

The effects of polymorphic transition for the impact of a 27NCD10 stee l projectile on a 27NCD10 steel target at 1280 m/s is presented. Compa risons between results of 2D numerical calculations performed with and without polymorphic transition show the influence of this phenomenon on stress distribution and tension zones in the target and in the proj ectile. Good agreement between experimental and calculated free surfac e velocity profiles is obtained with polymorphic transition and damage models taken into account.