The elastic-plastic fracture parameter J integrals for the gun barrel are calculated by use of nonlinear finite element method based on increamental theory. J_R resistance curve for the steel used is determined experimentally.
Through analyzing the factors such as light intensity, light uniformity, field size and spatial resolution that affecting CCD imaging quality within the inner bore of a gun barrel, an optimization design for light path structure and parameters of a photoelectric spying bore optical system by enlarging the scene depth of CCD imaging lens is proposed and the mathematical model has been set up.
When a pulse of electrical heat was trigged while burst of high pressure propellant of He (3 5MPa) was admitted, the pellet could be accelerated in a gun barrel with inner diameter of 1.1 mm and length of 270 mm to a speed up to 300～500m/s.
The thickness of the duplex layer was measured from the specimen taken from a new gun barrel with an optical microscope.
Erosion testing of a Ti--15% Mo alloy (TIMETAL 21SJL160209) under simulated gun barrel conditions
The pressure rise is limited because of the nonsimultaneity of propellant ignition and combustion and the discharge of the propellant combustion products through the gap between the projectile and the walls of the gun barrel.
Conical and measuring adapters with liners made of thermally- and wear-resistant alloys are designed to prevent ablation of the light-gas gun barrel.
Variation of Interior Ballistic Parameters at a Constant Mean Pressure in the Postprojectile Space of a Gun Barrel