howdy all I have come across a strength of materials/mechanics question that I cannot solve. Basically, the question is.. i have a projectile of known mass and material traveling at a known velocity towards a plate. The plate's dimensions (base and height) are known, as well as the mass and material properties. The thickness of the plate is variable. My question is... how thick does my plate have to be withstand the force from my projectile and not fail? i have tried a number of methods with this, and am stumped. I know how to solve this problem if the plate is subject to an applied force, and i can even calculate an impact force on the plate from the projectile. However, i know impact force and applied loads are different, and i dont know how to put an impact force in terms of an applied load. Also, for a question like this would the shape of the projectile matter?? in this case whats the worst case scenario? I have access to cosmosworks, and figured i could do a drop test.. but thatll only show me how my projectile deforms, not my plate. I dont wanna shell out tons of money for ansys... I really am not sure how to solve this, although on the surface it seems like a fairly simple problem.. If you can offer any help it would be greatly appreciated.