Abstract: A method for molding a composite pressure vessel liner to secure a boss to the liner is described. The method comprises providing a moldable liner having an end section with a neck and a port. A boss is positioned around the neck of the liner and the liner is heated and pressure is applied to mold the liner to form to the shape of the boss. The angle of the molded liner secures the boss in place around the liner and it is able to withstand high pressures. A tool for molding the liner and a method for using the tool is also described. The tool comprises a tool body and a pipe having external threads. The tool body abuts the liner and the boss. Winding the pipe exerts pressure on the liner, which when heated, forces the liner to mold to the shape of the boss.

Abstract: The invention herein relates to a flywheel capable of high speed rotational operation in excess of 15,000 rpm, the flywheel comprising a composite rotor having a polymeric matrix in which are embedded fibers helically wound at an initial angle with respect to the axis of rotation of the rotor of from about 50° to about 80° and increasing in a stepwise or continuous manner to about 90°.

Abstract: A reinforced armor (200) and a process for reinforcing an armor by composite layering are provided. The reinforced armor (200) includes a core structure having a strike face and a back face, a first composite fiber laminate (220) having a plurality of composite fiber plies, bonded to the strike face of the core structure, and a second composite fiber laminate (225) having a plurality of composite fiber plies, bonded to the back face of the core structure. The process for reinforcing the armor includes creating the first and second composite fiber laminates from a plurality of plies of fibrous material impregnated with a resin matrix, and bonding the first and second composite fiber laminate to both the strike face and the back face. Advantageously, the reinforced armor (200) is capable of providing protection against hazards while having a light weight compared with a rigid armor such as steel or ceramic.

Abstract: Tensioned gun barrel liners, and methods and apparatus for tensioning gun barrel liners are disclosed. Tensioned gun barrels have been shown to have superior performance. The apparatus allows for axial strain to be imparted into the gun barrel using mechanical means while other embodiments utilize thermal expansion of the material such as metal that is used for the gun barrel liner to introduce the strain and maintain it using other mechanical means or applied material such as composites.

Abstract: A method for molding a composite pressure vessel liner to secure a boss to the liner is described. The method comprises providing a moldable liner having an end section with a neck and a port. A boss is positioned around the neck of the liner and the liner is heated and pressure is applied to mold the liner to form to the shape of the boss. The angle of the molded liner secures the boss in place around the liner and it is able to withstand high pressures. A tool for molding the liner and a method for using the tool is also described. The tool comprises a tool body and a pipe having external threads. The tool body abuts the liner and the boss. Winding the pipe exerts pressure on the liner, which when heated, forces the liner to mold to the shape of the boss.

Abstract: A method for molding a composite pressure vessel liner to secure a boss to the liner is described. The method comprises providing a moldable liner having an end section with a neck and a port. A boss is positioned around the neck of the liner and the liner is heated and pressure is applied to mold the liner to form to the shape of the boss. The angle of the molded liner secures the boss in place around the liner and it is able to withstand high pressures. A tool for molding the liner and a method for using the tool is also described. The tool comprises a tool body and a pipe having external threads. The tool body abuts the liner and the boss. Winding the pipe exerts pressure on the liner, which when heated, forces the liner to mold to the shape of the boss.

Abstract: This invention relates to a flywheel and method of manufacture thereof wherein the flywheel is capable of operation at very high rotational speed without precise balancing.

Abstract: A method of incremental autofrettage is taught herein, whereby the cycle life of a metal liner in a pressure vessel is increased. This method serves to increase the yield strength of the metal liner through sequential work hardening due to repeated autofrettage at increasing pressures. By incrementally increasing the internal pressure used in the autofrettage process, the compressive stresses at an inner surface of the metal liner may be controlled so that post-pressurization buckling does not occur, yet the yield strength of the metal liner is substantially increased. The higher compressive stresses in the metal liner mean that higher Maximum Expected Operating Pressures (MEOPs) may be used without detracting from the cycle life of the metal liner, or alternatively, for lower pressures, a longer metal liner cycle life may be obtained. Either internal or external pressures may be used, generated by a pressure source, or a suitable die.