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Advanced Composite Applications to Large Caliber Weapons Systems,
ARMY MATERIALS AND MECHANICS RESEARCH CENTER WATERTOWN MA
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Composite materials are ideal for structural applications where high strength-to-weight and stiffness-to-weight ratios are required. Aircraft, spacecraft, and missiles are typical weight-sensitive structures in which composite materials are utilized. According to Jones 1 there are three commonly accepted types of composites 1 Fibrous composites which consist of fibers in a binding matrix, 2 Laminated composites which consist of layers of various materials, and 3 particulate composites which are composed of particles in a binding matrix. This study deals with composites of the first type--the application of an advanced fibrous composite, graphiteepoxy, to increase the overall performance of the barrel extension used on the 75mm rotating chamber single shot firing fixture. In order to increase accuracy and muzzle velocity, an all-metal barrel extension had been added to the 75mm gun tube where the muzzle brake had been located. This extension increased the muzzle velocity, but round dispersion was still apparent. This round dispersion was attributed to the initial droop of the tube caused by its body forces.
APPROVED FOR PUBLIC RELEASE