Experimental and Simulation Research on the Quasi-dynamic Extrusion Process of the Belt

Abstract

The extrusion process of the elastic belt is a process in which the elastic belt and the inner bore of the barrel undergo complex contact and collision, and the rifling gradually penetrates the elastic belt, so that the material of the elastic belt continues to fail and destroy. It has high instantaneous, strong impact, high temperature, high-speed change There is a big gap between the existing theory and the actual squeeze-in process, and it is urgent to carry out research work on this problem. In this paper, a quasi-dynamic test device for the extrusion process of the elastic belt is established. On this basis, the extrusion history of a small-caliber projectile under different belt materials, different extrusion speeds, different extrusion force loading rates and different chamber pressure loading rates is established. The experimental comparison research was carried out. Based on the experimental data, the model calibration was carried out for the simplified chip resistance model of the belt extrusion process, and the calibration model was used to test the extrusion resistance of a newly designed large-caliber and howitzer belt extrusion process. The prediction research is carried out, which provides a reference for the optimal design of internal ballistics and charges, projectiles and barrels, and the coupling design of projectiles, guns and charges in a system.