Dynamic stress analysis of anisotropic gun barrel under coupled thermo-mechanical loads via finite element method

Abstract

This work focused on the stress response of anisotropic 30SiMn2MoVA steel gun barrel under coupled thermo-mechanical loads, namely, the contact pressure and friction of projectile, thermal load and pressure of propellant gas. The effect of temperature on the mechanical properties of gun barrel was considered. Two thermal-displacement coupled finite element models (FEM) were built by ABAQUS software. The first was the interaction model of projectile and barrel which was to calculate the stress of barrel engraved by copper jacket and steel jacket projectile. The results of barrel in the interaction model, as an initial condition, were imported to the second FEM which was applied with thermal load and pressure of propellant gas. The results show that the rifling at chamber throat has the largest stress and circumferential stress under coupled loads. It gives a request that the gun barrel should have the better circumferential mechanical properties. The plastic deformation of the rifling at the chamber throat is observed which indicates that 30SiMn2MoVA gun barrel has a low service life due to the poor mechanical properties. Keywords 30SiMn2MoVA steel; anisotropic gun barrel; stress response; coupled thermo-mechanical loads; copper jacket and steel jacket projectile; thermal load and pressure of propellant gas

Thermodynamic Coupling Simulation of CrN/Cr Composite Coating Barrel Bore

“…changes of time and displacement can be taken into account, and the pressu powder gas can be obtained as the launch time. These curves are shown i this study, the stress we analyzed is a coupled stress [19].…”

“…According to the interio equation, the gunpowder gas temperature as a function of time can be obtaine heat transfer coefficient is calculated according to the similarity criterion equa the average convective heat transfer coefficient of the gunpowder gas can be ob a function of launch time [18]; according to the internal ballistic equation, the changes of time and displacement can be taken into account, and the pressure o powder gas can be obtained as the launch time. These curves are shown in Fi this study, the stress we analyzed is a coupled stress [19].…”

Modeling and simulation on dynamic engraving process of small caliber armor-piercing projectile with lead-free aluminum filler

“…The mesh was divided by the finite element preprocessing software HyperMesh. The mesh was divided by a hexahedral reduced integral element (C3D8R), And a grid-independent verification was performed [18].…”

“…The method of coupling the classical internal ballistic equation was used to apply a chamber pressure load to the bottom of the projectile, to push the projectile engraving into the chamber throat and rifling [18,23]. The dynamic engraving process was simulated using the ABAQUS/Explicit solver.…”

“…Usually, the finite element simulation method can be used to study the dynamic engraving process of the projectile. And this method has been used in many researches to analyze the dynamic engraving process and the movement in-bore of the projectile, and it has been proved to be reliable and effective [16][17][18].…”