Abstract: Carbon fiber reinforced composite can be widely used as a kind of structure material for weapon lightweight design, because it has high specific strength and stiffness, weight-light, excellent designability, good corrosion and fatigue resistance property. In this paper, the mechanical properties of traditional mortar barrel was analyzed, and it shows that the barrel weight cannot be reduced and with a bad designability by using metal. To meet the weight-light need, a double-deck structure of mortar composite barrel was designed which was composed of metal lining and carbon fiber reinforced composite outer layer. The winding lathe and technology of carbon fiber reinforced composite mortar barrel was introduced. The experimental curves of strain-loading vs. winding tension, fiber stacking sequence and carbon fiber types were obtained. Based on the experimental data, the effects of winding tension, fiber layer laying sequence and carbon fiber grade on composite barrel static pressure bearing capacity were analyzed. It can be concluded that the metal lining can be thinner and the barrel can be more lightweight by using the carbon fiber as outer strengthened layer, and stacking sequence had little effect on the static load of the barrel. Besides, strain-loading can be improved by increasing the winding tension properly. All of these can provide a reference for the structure design of composite barrel and other composite cylinder.

Key words: carbon fiber composite, composite barrel, structure design, winding technology