USA As Represented by Secretary of the Navy

Nova Research, Inc.

Yan R Kucherov

Graham K Hubler

Brant G Johnson

A composite armor plate includes a fracture layer placed adjacent to a ceramic layer. The ceramic layer provides a ballistic resistant layer that receives a ballistic impact and propagates a compression wave. The fracture layer is placed behind the ceramic layer and absorbs a portion of the compression wave propagating out in front of the ballistic impact. The absorbed compression wave causes the fracture layer to at least partially disintegrate into fine particles, which dissipates energy in the process. To cause a higher degree of fracturing (and thus larger dissipation of compression wave energy) the fracture layer includes a plurality of resonators embedded in a fracture material.

Armor plate with shock wave absorbing properties

A heat dissipation system that includes a structure having a surface with a cavity recessed on the surface. A wing or channel causes a vortex to occur in the cavity. Destabilizers, such as projections or recesses are disposed on the sidewall of the cavity to disrupt the local surface boundary layer that forms in the cavity. Alternatively, a plurality of freely moving bead elements are disposed in the cavity to disrupt the local surface boundary layer. A cover can be included that prevents the bead elements from exiting the cavity.

Heat dissipation system with surface located cavities for boundary layer disruption

Heat dissipation system with boundary layer disruption

A system for reducing the effects of a blast wave includes armor plating configured to face a supersonic blast wave. The armor plating has a surface consisting of alternating tall and short peaks with valleys between the peaks. The peaks and valleys are positioned such that the supersonic blast wave reflects from the side surfaces of the tall peaks as a regular reflection that at least partially suppresses Mach reflection of the supersonic wave caused by the short peaks and the valleys. The surface may also be designed to not trap reflected waves. The valleys can be parabolic shaped to deflect and/or dissipate transonic flow that follows the blast wave front.

Blast wave effects reduction system

An armor plate transforms projectile energy into solid-state lattice waves and facilitates absorption of these waves at different wavelengths. For high frequency lattice waves, dopants are used for absorbing the lattice waves and converting them to thermal energy. Heavy dopants and layered materials can also be use for reflecting lattice waves to facilitate attenuation through absorption. A spreading layer can also be used for dispersing non-absorbed lattice waves.

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Alexandria, VA, United States of America

Yan R Kucherov