Embodiments of the present application includes methods and structures for Anti-Ballistic Shelters, including an anti-ballistic shelter having a frame comprising at least one support member, and one or more surfaces comprising a flexible high strength layered anti-ballistic material attached to the frame, wherein the flexible high strength layered anti-ballistic material is layered in at least two directions; and further wherein the layered anti-ballistic material is enveloped around the frame.

A structural sandwich panel including a structural sheet bonded to two adjacent sheets with a plurality of spaced columnar projections extending perpendicularly from a local face from the sheets. The sectional panel may be interposed in a void of a double-wall ballistic sandwich panel. The panel provides an interconnected interstitial space between layers that may serve as a filler space for the placement of force diffusing material such as ball bearings to deflect and defeat any projectile when used as a ballistic panel in light amour vehicles, water craft, personnel protection and building structure or equipment, but also provides maximized structural rigidity in the length and width direction of a product.

An interleaving hexagonal tile (AHT) is provided for incorporation onto a liner in an array for a personnel armor clothing article. The AHT includes a hexagonally-symmetric solid object composed of a homogeneous material. The object includes a geometry that has obverse and reverse planar surfaces parallel to each other. Each planar surface has triangularly disposed terminals. First and second triple sets of oblique surfaces are disposed between the obverse and reverse planar surfaces. A plurality of facets is disposed substantially perpendicular to the planar surfaces. The facets connect between edges of the planar surfaces and adjacent edges of the oblique surfaces. The first and second triple sets of oblique surfaces are disposed to alternate with each other.

A super-hard material is a late transition metal doped B.sub.4C ceramic. The lightweight ceramics can display Vickers Hardness in excess of 45 GPa. Transition metals, such as Ni, Co, Rh, and Pd can be doped into the boron carbide at levels up to about 2.5%. A spark plasma sintering (SPS) of an evacuated powder of B.sub.4C and the transition metal at temperatures up to 2000 C., and pressures of up to about 100 GPa forms a super-hard material as a body. The late transition metal doped B.sub.4C ceramic can be used for armor, grinding materials, thermoelectric materials, and catalysts.

A composite laminate is made by providing at least a first composite ply and a second composite ply, each having longitudinally oriented fibers in a thermoplastic matrix. The second composite ply is disposed on, and in transverse relation to, the first composite ply. Preferably, the second ply is disposed at 90 relative to the first ply. An article can be manufactured by providing a core material and applying a reinforcing material to a portion of the core material. The reinforcing material is a reinforcing composite ply or a composite laminate as described herein. Optionally, the core material is a prepreg that may be a composite laminate.

Armor plate having a thickness of at least 3 mm and an edge length of at least 20 mm, wherein the armor plate consists of a material made largely of a component selected from the group hard metal, cermet and/or combinations thereof. An armor plate composite comprising at least two layers of armor plates and an armor are provided as well.

An armor plate consists of a material comprising a cermet, and the armor plate has a density in the range from 5.0 to 6.5 g/cm.sup.3. An armor plate composite and an armor are provided as well.

BAFFLE Disclosed is a baffle (40) for locating in a tank (16) for containing liquid (e.g. an aircraft fuel tank). The baffle (40) is a tubular member through which a liquid may flow. The baffle (40) comprises: a first tubular portion (42) providing a tubular outer wall, and a second tubular portion (44) located within the first tubular portion (42) and providing a tubular inner wall. The first and second tubular portions (42, 44) are substantially parallel. The first and second tubular portions (42, 44) are spaced apart to define a chamber (46)therebetween. The baffle (42, 44) further comprises radial side walls between the first and second tubular portions (42, 44) such that the chamber (46) is a sealed chamber. The chamber (46) may be filled with a compressible gas or gaseous mixture.

A helmet including an insert provides the ability of including a highly energy absorbing feature within the insert. The insert includes a structure such as a Bingham plastic which, upon impact, absorbs the energy of the impact by converting from a solid to a liquid. Other energy absorbing features are contemplated. The energy absorption process occurs in one aspect in a nonreversible manner such that once a high enough level impact occurs on the insert, it must be replaced within the helmet. The insert has a fastener which enables it to be replaceable. In this manner, a highly absorbing feature of a helmet can be provided to reduce concussions while not requiring the complete replacement of a helmet.

A liquid storage system comprising: a tank for containing a liquid, the tank enclosing a liquid storage space; and a tank liner fixedly attached to an internal surface of the tank (16). The tank liner comprises: a plurality of elements, each element having a hardness value of 2 GPa or above; and a binder material in which the plurality of elements are embedded. The elements have a higher hardness value than the binder material. A distance between a first element and the internal surface of the tank in a direction normal to the internal surface of the tank is different to a distance between a second element and the internal surface of the tank in the direction normal to the internal surface of the tank, the first element being different to the second element.