مقارنة الاداء البالستي لقذيفة مخروطية الرأس و أخرى مدببة الرأس بالاعتماد على فرضية توسع الفجوة الاسطواني

Abstract EN

The paper aims to investigate and compare the ballistic performance of the ogival nose and the conical nose projectiles, and the affect the construction of the projectile's nose on the plastic penetration in Aluminum target.

By using Cylindrical Cavity Expansion theorem which is suitable for ogival and conical nose.

And by using conservation region to elastic and plastic region, during the touch of the projectile with the target and by using conservation equation, the target substance response was calculated (the particle velocities during cavity formation and associated stresses) during the impact.

Then the produced stresses at the projectile's nose were found.

These stresses were used for calculating the decreasing in projectile velocity.

Then the final projectile velocity was approximated in either the full penetration or final depth of the projectile in the target mechanism was suitable for both types of projectiles and also for ductile metals.

Form of the nose projectile causes displacement the metal particles in radial direction more efficient than conical one, since the ogival form of the nose projectile causes displacement the metal particle in radial direction more than conical nose, and this leads to reduce the produced stresses in the projectile's nose.

Then this leads to reduce the absorption energy by the projectile.