Abstract: A lightweight composite armor including an integrally formed matrix block is disclosed. The matrix block includes a generally planar back, a plurality of intersecting ridges extending from the front of the planar back, and fillets provided at the junctures between the planar back and the ridges and at the juncture between the ridges. The matrix block thus forms a pattern of open topped cells. An energy absorbing ceramic body is located in each cell. Individual front plates sized to fit in the open top of each associated cell in mating contact with the ceramic body and provided with upstanding flanges around the periphery thereof are also provided. A weld around the periphery of the front plates between the flanges and associated tops of the ridges is provided. In this manner, impact by a projectile on one of these front plates substantially limits any damage to that one front plate and the underlying ceramic body leaving the remaining armor substantially undamaged.

Abstract: Method of containing fractured turbine engine components, for example rotor and blade fragments within turbine engine casings, comprising diffusing and impeding motion of the fractured blade fragment by encircling the turbine engine with an honeycomb structure; shielding the honeycomb with an outer shell which has a high bending stiffness and which encloses a series of subdivided compartments in juxtaposition with the honeycomb; and absorbing energy of the fractured blade fragments by supporting a series of ceramic blocks within the confined compartments adjacent said honeycomb. A suggested ceramic for use in the blocks is a hot-pressed silicon carbide. The method is distinguished from the prior art in its ability to sustain the subsonic velocities.