Fatigue Simulation Analysis of Semi-open Thick-walled Cylinder under Cyclic Loading

Abstract The fatigue of the gun barrel is an important factor affecting the life of the gun barrel. The gun barrel is simplified into a semi-open thick-walled cylindrical container. The stress form and load type are analyzed according to the internal ballistic model of the artillery. The model is set to simulate the initial boundary conditions and load parameters, and the fatigue response of the gun barrel under different cyclic load impacts is compared and analyzed. The results show that the fatigue danger zones of the different load strengths are basically the same, and the load strength has the fatigue life of the gun barrel. The greater the impact, the life of the body under the strong charge load is reduced by 59.81% compared with the life of the positive charge. In the design and test of the gun barrel, the life of the body under the strongest load is used as the evaluation standard.