The development of a semi-empirical barrel engraving resistance method for internal ballistic simulation codes

Abstract

This research focused on the implementation of a semi-empirical projectile barrel engraving resistance model for internal ballistic simulation codes. An alternative method is provided to determine the engraving resistance profile by the direct measurement of projectile movement and subsequent creation of the resistance curve. The identified research problem, subsequent literature survey, and the development of a semi-empirical projectile barrel engraving resistance model in internal ballistic simulation codes have not been previously investigated based on the literature survey conducted. The advantage of the developed approach is its relative simplicity and the elimination of the need for detailed material and structural analyses, as well as measurements of the projectile driving band material interaction with the gun barrel. The developed approach greatly improves the confidence over the traditional method in defining the shape of resistance curves for the simulation model of gun systems. This approach is based on intermediate experimental data, whereas the traditional method estimates the resistance curve definition only based on the final experimental velocity and maximum pressure.