Numerical calculation of barrel chamber mechanical wear based on the principle of dynamic pressure lubrication

Abstract

Thermal-chemical erosion and mechanical wear are the main factors restricting the service life of barrel weapons. Considering the lack of systematic research on the mechanical wear of the barrel weapons, this paper gives the display expression of the dynamic pressure lubrication friction coefficient in projectile-barrel clearance based on the principle of dynamic pressure lubrication. The trend of friction coefficient is basically consistent with the friction experiment data. In the framework of dynamic pressure lubrication friction, the mechanical wear model of artillery barrel is derived, and the mechanical wear model in the whole life cycle is calculated by using the ALE mesh adaptive technology. The results show that the derived mechanical wear model can accurately describe the material degradation of the barrel chamber. The mechanical wear is mainly concentrated at the beginning of the rifling and the muzzle. After 500 shots, the mechanical wear of the beginning of the rifling and the muzzle are generally 0.3mm and 0.4mm.