Working on a project regarding projectile impact on structural concrete walls and would like to be able to use some commonly accepted equations to confirm the reasonableness of finite element analysis results. We have been able to do this well for flat nosed and rounded projectiles but we are now examining aircraft engine impact.
Most equations to estimate penetration depth account for the shape of the impacting projectile through a "nose shape factor", N. There are widely accepted values for specific nose shapes such as flat, blunt, rounded, or pointed. What nose shape factor would be most appropriate for an aircraft engine? It certainly doesn't fall neatly into any of those four basic categories. I have found a few equations to calculate N based on nose geometry, but these equations do not neatly fit the geometry associated with an aircraft engine. Looking for any suggestions, particularly those supported by the literature. Thanks!
