Headspace Effect on Aluminum Cartridges Case Behavior

Aluminum cartridge case has long been considered as the alternative material for brass cartridge. It can efficiently reduce the weight carried by soldiers, help soldiers carry more ammunition with the same cartridge case, and thus improve the combat effectiveness. However, Aluminum cartridge case can be broken off during the course of use, which is a common phenomenon. By using the finite-element method, the paper is intended to analyze the effects on the deformation of cartridge case, the position and magnitude of maximum strain with the headspace variation law ;the maximum headspace of aluminum cartridge; the simulation result that maximum headspace indeed causes break is also verified by the firing experiment.