While conducting research on the projectile shattering I tried to use a model that was confirmed experimentally. A hardened steel core of an armor piercing B-32 projectile was used. (Jacket and incendiary powder are neglected for the simulation results)

14.5mm API B-32 at 850m/s vs 6mm RHA at 37 degrees.

The results are similar to those of the ballistic tests. The problem is my experiment, for which the same model was used:

14.5mm API B-32 at 850m/s vs 30mm RHA at 0 degrees.

Namely, the face of high hardness projectiles (about 600BHN) shouldn't erode so drastically.

The conclusion that can be drawn from this is that the model used in the study is only useful in some cases, namely for thin plates.

What is the reason for this? The projectiles are not homogeneous, the hardness varies greatly in different parts. The distribution is different, but generally the hardest face, the inner part of the nose can be 100-150BHN softer.

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