Theoretical and Experimental Study of the Interior Ballistics of a Rifle 7.62

Cronemberger, P. O.; Lima, Enrique Luis; Gois, Jorge Audrin Morgado de; Caldeira, Aldélio Bueno

doi:10.5380/reterm.v13i2.62089

Cited by 7 publications

(19 citation statements)

References 6 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The firing process of a firearm can be evaluated theoretically by mathematical methods from a variety of fields such as physics and thermodynamics. Multiple methods have been developed for evaluation of the firing process and include the Vallier-Heydenreich method as well as the lumped parameters method (19). The former is based on data tables and is good for quick and approximate estimation of interior ballistics but work best in conjunction with experimental processes in which the maximum pressure and muzzle velocity are determined (19).…”

Section: Theoretical Evaluation Of Internal Ballisticsmentioning

confidence: 99%

“…Multiple methods have been developed for evaluation of the firing process and include the Vallier-Heydenreich method as well as the lumped parameters method (19). The former is based on data tables and is good for quick and approximate estimation of interior ballistics but work best in conjunction with experimental processes in which the maximum pressure and muzzle velocity are determined (19). The latter method utilizes projectile dynamics and thermodynamics of gases to compute theoretical evaluation of internal ballistics.…”

Section: Theoretical Evaluation Of Internal Ballisticsmentioning

confidence: 99%

“…where df/dt is the web fraction, B is the burn rate constant, a is the pressure index, and Web is the web thickness (19). In this instance, the web represents the fraction of unburnt powder.…”

Section: Theoretical Evaluation Of Internal Ballisticsmentioning

confidence: 99%

“…where z represents the form function and k represents the form function coefficient which describes the geometric identity of the powder (19). Utilizing these equations, the mass of the gas produced from combustion can be calculated using:…”

Section: Theoretical Evaluation Of Internal Ballisticsmentioning

confidence: 99%

“…where m g is the mass of the gas evolved and m p is the mass of the propellant (19). Continuing from this equation, the Nobel-Abel equation of state can be utilized from equation 2.1.…”

Section: Theoretical Evaluation Of Internal Ballisticsmentioning

confidence: 99%

See 4 more Smart Citations

Effect of Chamber Pressure on the Quality of Breech Face and Firing Pin Impressions

Hamilton¹

View full text Add to dashboard Cite

Firearms evidence plays a vital role in shooting incident investigations. Included in this type of evidence is the comparison of fired cartridge casings. The evaluation of cartridge casings can inform investigators as to the number of firearms used in an incident. This evaluation includes the observation of breech face impressions imparted on the cartridge casing by the firearm. The comparison of these markings can assist investigators in the apprehension of perpetrators. However, the quality of these impressions may vary based on the pressures generated within a single system during firing leading to the appearance of multiple firearms being involved. Investigation into the differences in breech face markings generated by a single firearm should be conducted. In this study, .38 Special and .357 Magnum ammunition was reloaded to ensure variables were kept constant between each cartridge while varying the powder type and weight. Pressures generated during firing were recorded using the PressureTrace II system and muzzle velocities were measured using a MagnetoSpeed ballistic chronograph. The Pres-sureTrace II system allowed for plots of pressure against time to be generated for each firing repetition. Each fired cartridge case was then entered into the Integrated Ballistic Identification System (IBIS) allowing breech face and firing pin correlation scores between the cartridge cases to be generated. Correlation scores between the cartridge cases were then assessed for differences in breech face and firing pin scores. It was found that cartridges with greater differences between their charge weights and pressure gave lower average breech face scores while cartridges with more similar charge weights and pressures gave higher average breech face scores. However, firing pin scores showed less variation based on these variables.

show abstract

Section: Theoretical Evaluation Of Internal Ballisticsmentioning

confidence: 99%

Section: Theoretical Evaluation Of Internal Ballisticsmentioning

confidence: 99%

Section: Theoretical Evaluation Of Internal Ballisticsmentioning

confidence: 99%

Section: Theoretical Evaluation Of Internal Ballisticsmentioning

confidence: 99%

“…where m g is the mass of the gas evolved and m p is the mass of the propellant (19). Continuing from this equation, the Nobel-Abel equation of state can be utilized from equation 2.1.…”

Section: Theoretical Evaluation Of Internal Ballisticsmentioning

confidence: 99%

See 3 more Smart Citations

Effect of Chamber Pressure on the Quality of Breech Face and Firing Pin Impressions

Hamilton¹

View full text Add to dashboard Cite

show abstract

Design, analysis, manufacturing, and testing of a composite gun barrel

Uyanık,

Soydan,

Yılmaz

et al. 2024

Polymer Composites

View full text Add to dashboard Cite

User expects his weapon to be light and reliable and to perform multiple times firing per unit time at the same time. In today's technology, the maximum number of firings can be made per unit time with steel barreled weapons, but in composite barrels; many problems occur due to overheating, strength and reliability. Meeting these opposite demands is an engineering problem. In this study, the design of a composite‐steel combination light gun barrel is studied. Firstly, pressure distribution through the barrel has been calculated using Vallier‐Heydenreich method. According to the calculations, analysis has been conducted using both steel barrel and composite barrel. After the analysis, a composite barrel has been manufactured and testing has been conducted on an all‐steel barrel and the manufactured composite barrel. Composite is carbon fiber and resin is epoxy resin. In composite material, carbon fiber is preferred at the rates of 50% and 60%, the material of the steel barrel is AISI 416R stainless steel. The manufactured steel barrels have the same outer diameter but different wall thickness ratios, firing tests were conducted in such a way that the number of shots per unit time was the same.Highlights Stress distribution within a gun barrel was calculated using Vallier‐Heydenreich method. Design and finite element analysis analysis for an all‐steel gun barrel and a composite gun barrel was conducted. A composite gun barrel was manufactured; by using composite materials, the barrel was lightened by 24.8%. The manufactured composite gun barrel and an all‐steel gun barrel were tested by firing over 2500 shots.

show abstract

Numerical modelling of heat transfer and simulation of a 5.56 mm rifle barrel

Loiola

Susantez

Caldeira³

2023

J. Phys.: Conf. Ser.

View full text Add to dashboard Cite

Numerical simulations tend to be useful to have a deep knowledge of phenomena difficult to be observed. In this context, the heat transfer in a 5.56 mm rifle barrel was modelled, simulated and analysed, coupling the Baer-Frankle interior ballistics approach with one and two-dimensional unsteady heat diffusion numerical models. The heat transfer coefficient correlation was obtained using Sutherland approximation of diffusive transport coefficient and output data from PRODAS interior ballistics simulation software. The one-dimensional heat transfer model was solved in MATLAB® environment while the two-dimensional heat transfer model was solved in COMSOL Multiphysics and Simulation Software. The results were verified, providing discrepancies minor than 7% in relation to reference data.

show abstract

Theoretical and Experimental Study of the Interior Ballistics of a Rifle 7.62

Cited by 7 publications

References 6 publications

Effect of Chamber Pressure on the Quality of Breech Face and Firing Pin Impressions

Effect of Chamber Pressure on the Quality of Breech Face and Firing Pin Impressions

Design, analysis, manufacturing, and testing of a composite gun barrel

Numerical modelling of heat transfer and simulation of a 5.56 mm rifle barrel

Contact Info

Product

Resources

About