I am working in a project and I need some help (suggestions) from you.
If I have a wooden board, and I shot a projectile at a specific velocity. I am focusing on the energy consumption from the beginning to the end of the test.

I know the initial velocity, initial energy, final velocity, final energy.

the difference in the energies is because of deformation of the projectile, and energy consumed to make internal damage inside the board.

My question, if I know the area of this internal damage, how can I relate this to the energy ( to get an estimation of how much energy was consumed to make this area?

Thanks in advance,