The present invention provides a bi-active method of mounting a monolithic polycarbonate sheet or a laminate in a semi-rigid metallic framing system along two parallel sides of a rectangular shaped sheet or laminate with the two shorter parallel sides being unconstrained. In the case of a square shaped sheet, two parallel sides are supported in the semi-rigid frame, and the other two parallel sides are unconstrained. The semi-rigid frame utilizes cylindrically shaped hardware (i.e., bolts, rivets, studs, etc.) to hold the sheet or laminate. The semi-rigid frame is designed, via section and material properties, to flex and hinge about fixed mounting points along the length of the frame.

A composite structure, such as a laminated composite panel, for example, comprises one or more layers or plies embedded in a matrix material or otherwise fixed together in an arrangement, commonly referred to as a stack up. Each material in the structure has a corresponding material failure model (MFM) defining the physical characteristics of that material. A ballistic threshold velocity computing device obtains the MFMs for each material in the composite structure, generates a predicted ballistic velocity threshold velocity for each MFM, and then generates a parametric model to compute a composite ballistic velocity threshold velocity for the composite structure.

An Anti-Ballistic chair including a seat portion, and a first Anti-Ballistic panel removably inserted into a pocket having an opening formed within the seat portion, wherein the Anti-Ballistic panel comprises at least a first layer of Anti-Ballistic material formed from high-strength synthetic fibers extending in a first direction, and at least a second layer of Anti-Ballistic material formed from high-strength synthetic fibers extending in a second direction, different from the first direction.

A convertible bullet-proof backpack and vest includes a body section divided into a front portion, a middle portion, and back portion. The middle portion has a head slot opening, and the front and back portions have respective sections of bullet-proof fabric integrated therein. A zipper runs around an outer perimeter of the front and back portions. In a backpack configuration, the zipper secures the outer perimeters of the front portion and the back portion together thereby forming a hollow backpack interior between them. In a bullet-proof vest configuration, the zipper is unzipped thereby allowing a user to insert their head through the head slot opening such that the front portion hangs in front of a torso of the user and the back portion hangs behind the torso of the user.

A convertible bullet-proof backpack and vest includes a body section divided into a front portion, a middle portion, and back portion. The middle portion has a head slot opening, and the front and back portions have respective sections of bullet-proof fabric integrated therein. A zipper runs around an outer perimeter of the front and back portions. In a backpack configuration, the zipper secures the outer perimeters of the front portion and the back portion together thereby forming a hollow backpack interior between them. In a bullet-proof vest configuration, the zipper is unzipped thereby allowing a user to insert their head through the head slot opening such that the front portion hangs in front of a torso of the user and the back portion hangs behind the torso of the user.

An armor component including a body having a first portion including calcium boride compounds include non-stoichiometric calcium boride (CaB.sub.x) and stoichiometric calcium boride (CaB.sub.6) and having a density of at least about 80% theoretical density. In one aspect, the first portion can include a first phase comprising silicon carbide (SiC) and a second phase comprising calcium boride (CaB.sub.6). In another aspect, the first portion can further include a third phase comprising boron carbide (B.sub.4C).

A wearable container or pack that is quickly convertible into front and rear body armor without removing the pack from the torso of the wearer. The container or pack may include a bag that may be easily separated from the container or pack, and quickly dropped from the container or pack, providing supplies for another person.

A wearable container or pack that is quickly convertible into front and rear body armor without removing the pack from the torso of the wearer. The container or pack may include a bag that may be easily separated from the container or pack, and quickly dropped from the container or pack, providing supplies for another person.

A system and method for solid state metal plate repair is provided. A solid state metal plate repair system may comprise a drill, a cutter and a plug. The plug may be configured to fill a void created by the cutter. The plug may also be configured to create a metallurgical bond with the metal plate during a repair operation. The plug may also be configured to shear from the drill (e.g., drive motor) when an expected rise in torque indicates a sufficient bond has been achieved in the repair. The systems and methods described herein may be used on specialty alloys wherein other repair methods are undesirable.

A system and method for solid state metal plate repair is provided. A solid state metal plate repair system may comprise a drill, a cutter and a plug. The plug may be configured to fill a void created by the cutter. The plug may also be configured to create a metallurgical bond with the metal plate during a repair operation. The plug may also be configured to shear from the drill (e.g., drive motor) when an expected rise in torque indicates a sufficient bond has been achieved in the repair. The systems and methods described herein may be used on specialty alloys wherein other repair methods are undesirable.