In an ballistic impact, for the same projectile with different velocities, how the damage area on the front face varies with impact velocity. Projectile is 9 mm FMJ with lead core and brass jacket with velocity range of 400 - 440 m/s. Target is Kevlar with the thickness of 5 - 10 mm.
In ballistic impacts a wide variety of projectiles, impact conditions and target materials occur. These lead to different failure mechanisms and hence damage zones (both in projectile and targets). Therefore, your question is too general to be answered.
It would help to specify the range in velocities, the type of projectile (material, mass and shape) and the type of target material/set up (materials, thicknesses).
Projectile is 9 mm FMJ with lead core and brass jacket with velocity range of 400 - 440 m/s. Target is Kevlar with the thickness of 5 - 10 mm.
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