The mechanism of the rotating band engraving process of a large-caliber gun was studied by the methods of nonlinear finite element simulation.Based on Johnson-Cook constitutive model and combined with the experimental data,the nonlinear dynamic model of the engraving process was established in the finite element analysis software ABAQUS.The nonlinear dynamics of the rotating band was simulated using the explicit numerical integration algorithm.Through numerical calculations,the formation process of bearing band notch,the movement law of the projectiles and the variation law of the engraving resistance were analyzed,and the mechanism of rotating band engraving process was concluded,and the variation law of the rotating band engraving process caused by the friction was explored.The result shows that with the increase of the friction coefficient,the engraving time extends,and the engraving resistance increases,and the engraving pressure increases.These research results provide reference for the study on design of the large-caliber gun,projectile and gun charge.
Key words
gun /
engraving process /
constitutive model /
engraving resistance /
numerical simulation
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