Influence of Rotating Band Construction on Gun Tube Loading—Part I: Numerical Approach

Keinänen, Heikki; Moilanen, Seppo; Tervokoski, Janne; Toivola, Juha

doi:10.1115/1.4006354

Cited by 23 publications

(16 citation statements)

References 3 publications

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“…Based on the measured strain of the barrel's exterior surface, Andrews [8] found that high charges generally degrade the rotating band by reducing the load the rotating band applies to the 155 mm gun barrel during firing. The influence of rotating band construction on gun tube loading was investigated experimentally and numerically by Toivola et al [9] and Keinänen et al [10]. They presented a practical analysis method for determining the tube inner wall pressure from outer wall strain measurements, and the generated numerical results were in agreement with the measured firing results.…”

Section: Introductionmentioning

confidence: 96%

Tribology of rotating band and gun barrel during engraving process under quasi-static and dynamic loading

Wu¹,

Zheng²,

Tian³

et al. 2014

Friction

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Abstract:The engraving process of a projectile rotating band is one of the most basic research aspects in interior ballistics, which has not been thoroughly understood thus far. An understanding of this process is of great importance from the viewpoints of optimal design, manufacturing, use, and maintenance of gun and projectile. 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. The quasi-static engraving tests were performed on a CSS-88500 electronic universal testing machine (EUTM) and a special gas-gun-based test rig was designed for dynamic impact engraving of the rotating bands. The mechanical behaviors of copper and nylon were investigated under strain rates of 10 −3 s −1 and 2 × 10 3 s −1 using an MTS 810 and a split Hopkinson pressure bar (SHPB), respectively. Morphologies of the worn surfaces and cross-sectional microstructures were observed with scanning electron microscope (SEM) and optical microscope (OM). It was found that large deformation and severe friction occur during engraving. The surface layer is condensed and correlated with a hardness gradient along the depth from the top worn surface. The structure of the rotating band and gun bore, band material, and loading rate have great effects on band engraving. The flow stress-strain of the copper strongly depends on the applied strain rate. It is suggested that strain rate and temperature play significant roles in the deformation mechanism of rotating bands.

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Section: Introductionmentioning

confidence: 96%

Tribology of rotating band and gun barrel during engraving process under quasi-static and dynamic loading

Wu¹,

Zheng²,

Tian³

et al. 2014

Friction

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“…In terms of the effect of projectile on barrel, the interaction of barrel and projectile has been investigated based on FEA for a long time. Most studies mainly focused on the deformation and movement of projectile (Jiang et al, 2008, Wu et al,2014, KEINANEN et al,2012, Li et al,2016. Using the similar research method, some researchers analyzed the state of barrel.…”

Section: Introductionmentioning

confidence: 99%

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

Yang

Zhang

et al. 2020

Lat. Am. j. solids struct.

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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

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“…Toivola and Keinänen [6] performed a simplified 2D explicit finite element analysis(FEA) to calculate the effect of rotating band's geometric and material property changes on the gun tube stress, they assumed the frictional coefficient decreased with the contact pressure rising. Sun [8] introduced the solution of interior ballistic equations as the boundary of the finite element model, and took the projectile displacement and velocity got from FEA as initial conditions to solve the ordinary differential equations of interior ballistic.…”

Section: Introductionmentioning

confidence: 99%

High speed sliding of rotating band engraving process

Qian

Chen

2015

2015 IEEE International Conference on Information and Automation

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The dynamic characteristics of rotating band engraving process are greatly affected by the friction behavior between the rotating band and barrel, for the shear stress determines the material flow pattern, meanwhile, the heat generated by friction accumulates on the surface and softens the material near the interaction surface. This paper presents a simulation to analyse the rotating band engraving process of large caliber rifled guns. A new temperature dependent friction stress model is introduced to calculate the friction behavior between the rotating band and barrel. The model considers shear strength of the material by using equation derived from the Johnson-Cook constitutive model. The contact pressure, temperature distribution and some dynamic characteristics can be obtained from the simulation, the results are in good agreement with those from references.

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Influence of Rotating Band Construction on Gun Tube Loading—Part I: Numerical Approach

Cited by 23 publications

References 3 publications

Tribology of rotating band and gun barrel during engraving process under quasi-static and dynamic loading

Tribology of rotating band and gun barrel during engraving process under quasi-static and dynamic loading

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

High speed sliding of rotating band engraving process

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