Hello,

I wrote a script in python to simulate a spherical projectile 2.5mm traveling at 150 m/s and hitting a target made with 18 layers of CFRP. The CFRP damage initiation and evolution was modeled using a VUMAT, the projectile was modeled as a rigid body, interaction between projectile and target is surface to surface interaction in Abaqus.

The script ran without any error and gave a residual velocity of 143m/s (which I think is strange when impact velocity is 150m/s). The weird thing is that even when I made the mesh finer, the residual velocity remained unchanged. No matter what I did, the residual velocity remained unchanged.

WHAT MIGHT BE RESPONSIBLE FOR THIS KIND OF BEHAVIOR PLEASE?

Thank you