Abstract: A helmet shell is formed having an outer section of fibrous layers, a middle section of fibrous layers and an inner section of fibrous layers. The outer section layers contain high tenacity abrasive fibers in a resin matrix. The middle section layers contain high strength polyolefin fibers and are in the form of woven or knitted fabrics with a resin matrix. The inner section layers contain high strength polyolefin fibers and are in the form of non-woven fabrics with a resin matrix. The helmet is lightweight and resists penetration of rifle bullets.

Abstract: A foam pad structure for helmets comprising a hard foam layer and a soft foam layer wherein the hard foam layer and the soft foam layer contain holes or channels scattered throughout the hard foam layer and the soft foam layer in a pattern so as to scatter an incoming pressure wave. A method of mitigating an incoming pressure wave comprising creating through-holes or channels in a soft foam layer, creating through-holes or channels in a hard foam layer, placing the hard foam layer inside a helmet shell, and placing the soft foam layer on the hard foam layer.

Abstract: Multi-panel ballistic resistant articles formed from woven and/or non-woven fibrous panels, each panel including varying quantities of a polymeric composition based on the total weight of the fibers and the polymeric composition. The hybrid structures provide excellent ballistic penetration resistance while maintaining a low weight. The ballistic resistant articles may be strategically positioned to dial in different levels of desired ballistic resistance for various applications.

Abstract: A boron carbide body having a graphite content in which the central portion of the body includes more graphite that the region surrounding the central portion and adjacent the exterior surface thereof, and a method for fabricating the boron carbide body.