Journal ArticleDOI
Influence of Rotating Band Construction on Gun Tube Loading—Part I: Numerical Approach
TLDR
In this article, the effects of changes in geometries and material properties of rotating band and long range artillery projectile shell body on gun tube stress are presented based on numerical calculations (finite element analysis, FEA).Abstract:
The effects of changes in geometries and material properties of rotating band and long range artillery projectile shell body on gun tube stress are presented. The results are based on numerical calculations (finite element analysis, FEA). Numerical explicit dynamic analyses were performed assuming elastic–plastic material behavior and nonlinear kinematics. Mechanical loading of shell body was controlled by pressure–time relationship based on the simulation of internal ballistic cycle. One degree slice of projectile and forcing cone section of gun tube was modeled as simplified smooth bore 3D analysis model. The results were in agreement with the measured results in firing trials and also with the results presented in open literature. Although simplified computations were used, the influences of the structural modifications of the rotating band and the shell body were shown.read more
Citations
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Journal ArticleDOI
Underwater drag reduction by gas
Jiadao Wang,Bao Wang,Darong Chen +2 more
TL;DR: In this paper, the stable existence of gas is a requirement for underwater drag reduction induced by slippage at the water-solid interface, and therefore it is essential to replenish a new gas supply for continued presence of gas at the interface for continued underwater Drag reduction.
Journal ArticleDOI
Friction and wear between rotating band and gun barrel during engraving process
TL;DR: In this paper, two short rifled gun barrel sections and projectiles with copper, Al-bronze and nylon rotating bands were prepared for quasi-static and dynamic push tests on the CSS-88500 Electronic Universal Testing Machine (EUTM) and a specially designed gas gun-based dynamic impact test rig.
Journal ArticleDOI
Influence of Rotating Band Construction on Gun Tube Loading: Part II: Measurement and Analysis
TL;DR: In this article, the effects of changes in construction of rotating band and long range artillery projectile shell body on gun tube loading are studied experimentally, and a practical analysis method for tube inner wall pressure computation from outer wall strain measurements is presented.
Journal ArticleDOI
Transient finite element for in-bore analysis of 9mm pistols
TL;DR: In this paper, a nonlinear transient finite element method (FEM) is used to simulate the in-bore behavior of a 9mm bullet after being fired, where the chamber pressure is calculated by Vallier-Heydenreich formula and is used as the input loading.
Journal ArticleDOI
Tribology of rotating band and gun barrel during engraving process under quasi-static and dynamic loading
TL;DR: In this paper, the interaction of copper and nylon rotating bands with a CrNiMo gun barrel during engraving was studied under quasi-static and dynamic loading conditions, and it was suggested that strain rate and temperature play significant roles in the deformation mechanism of rotating bands.
References
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Journal ArticleDOI
Surface Melting of Rotating Bands
TL;DR: The first formation of the molten surface film on gilding metal bands was estimated by observing the location of the drop in the coefficient of friction as discussed by the authors, which was reached before the bands were completely engraved in the case of a 155 mm howitzer firing at low zones.
Journal ArticleDOI
Projectile Driving Band Interactions With Gun Barrels
TL;DR: In this paper, the effect of a narrow pressure band on the deformation of a thick-walled tube was investigated using a 155 mm gun barrel during a series of firing trials.
Analysis of Engraving and Wear in a Projectile Rotating Band
TL;DR: In this paper, a large deformation analysis of the engraving process and wear in a rotating band is considered by using the finite element program ABAQUS, where the tube and the projectile are assumed to be rigid and the bore of the tube is smooth and axisymmetric.
Modeling of Barrel/Projectile Interaction in a Rotating Band
P. C. Chen,M. Leach +1 more
TL;DR: In this article, the ABAQUS program was used and a refined finite element mesh was chosen to complete the modeling of the barrel/projectile interaction in a rotating band, and the calculations for the engraving processes proceeded until the projectile had passed completely through the forcing cone in the land and groove.
Journal ArticleDOI
Evidence for the Melt-Lubrication of Projectile Bands
TL;DR: In this article, it was shown that a thin surface film of molten rotating band material can also be produced on the surface of materials other than copper alloys contacting the bore at high surface loads and velocities.