Concept of a gun barrel based on the layer composite reinforced with continuous filament

The work presents the concept of a gun barrel reinforced with the continuous filament. The barrel’s vulnerability to vibration and bending during shooting significantly affects the accuracy of fire. The phenomenon of vibrations of the barrel is compensated by its mass and such parameters as the maximum pressure acting in its front part, i.e. the cartridge chamber and the inner walls of the barrel to the range of maximum internal pressure and pressure exerted on the bottom of the projectile and internal temperature. The selection of the appropriate stiffness and length of the barrel consists in reducing the temperature ratio of the gas mixture behind the projectile when it is leaving the barrel to the gas mixture being the decomposition products of propellant explosives under isochoric and isothermal conditions. It has been proposed to reinforce the model of the barrel with filament carbon fiber to improve stiffness while reducing its mass. This model was subjected to numerical analyses using the ABAQUS program. On the basis of the results obtained in the form of stress distribution occurring in the wall of the barrel with a complex structure, the fatigue strength and certain modal forms of the analyzed barrels have been predicted. The FEM results were verified based on a modal experiment carried out on the real barrel.