Use of metal foams in armor systems

An armor system multilayer comprising an impingement plate, a plate of deformable reinforcement and one or more intermediate layers between them, characterized in that one or more intermediate layers include an absorbing shock comprising a metallic foam having cells distributed therealong, and in the application of a force on said strike plate, the element shock absorption is required to withstand several progressive modes corresponding deformation to elastic deformation substantially linear, a deformation cell collapse and densification deformation, in response to the magnitude of the force applied to the impact plate.