Título
Internal ballistics of polygonal and grooved barrels: A comparative study
Autor
LUIS ADRIAN ZUÑIGA AVILES
USIEL SANDINO SILVA RIVERA
ADRIANA HERLINDA VILCHIS GONZALEZ
PEDRO ALEJANDRO TAMAYO MEZA
WILBERT DAVID WONG ANGEL
Nivel de Acceso
Acceso Abierto
Licencia
Materias
Polygonal rifling - ([0036-8504, 2047-7163]) - ([0036-8504, 2047-7163]) groove rifling - ([0036-8504, 2047-7163]) - ([0036-8504, 2047-7163]) impression on fired bullets - ([0036-8504, 2047-7163]) - ([0036-8504, 2047-7163]) transient analysis - ([0036-8504, 2047-7163]) - ([0036-8504, 2047-7163]) INGENIERÍA Y TECNOLOGÍA - (CTI)
Resumen o descripción
As a parameter important ballistic, the research about polygonal and grooved barrels’ behavior has not been widely carried out. The pressures, velocities, stresses, deformations, and strains generated by the firing of 9 mm × 19 mm ammunition in weapons with polygonal barrels are analyzed numerically and experimentally, compared with those generated in pistols with grooved barrels. The Finite Element Method with equal boundary and loading conditions was used in both types of guns, specifying the actual materials of the projectile and the barrels. Subsequently, experimental tests were carried out on various weapons with 9 mm ammunitions of 115, 122, and 124 gr. The results show that the 9 mm bullet fired in a polygonal barrel undergoes a maximum deformation towards its exterior of 0.178 mm and interior of 0.158 mm, with stress up to 295.85 MPa. Compared with 0.025 mm maximum external deformation and 0.112 mm internal deformation of 9 mm projectiles fired in a grooved barrel, with stress up to 269.79 MPa. The deformation in the polygonal barrel is in a greater area, but the rifling impression left is less deep, making its identification more difficult. Although there are differences in the stresses and strains obtained, similar velocity and pressure parameters are achieved in the two types of barrels. This has application in the development and standardization of new kinds of barrels and weapons.
As a parameter important ballistic, the research about polygonal and grooved barrels’ behavior has not been widely carried out. The pressures, velocities, stresses, deformations, and strains generated by the firing of 9 mm × 19 mm ammunition in weapons with polygonal barrels are analyzed numerically and experimentally, compared with those generated in pistols with grooved barrels. The Finite Element Method with equal boundary and loading conditions was used in both types of guns, specifying the actual materials of the projectile and the barrels. Subsequently, experimental tests were carried out on various weapons with 9 mm ammunitions of 115, 122, and 124 gr. The results show that the 9 mm bullet fired in a polygonal barrel undergoes a maximum deformation towards its exterior of 0.178 mm and interior of 0.158 mm, with stress up to 295.85 MPa. Compared with 0.025 mm maximum external deformation and 0.112 mm internal deformation of 9 mm projectiles fired in a grooved barrel, with stress up to 269.79 MPa. The deformation in the polygonal barrel is in a greater area, but the rifling impression left is less deep, making its identification more difficult. Although there are differences in the stresses and strains obtained, similar velocity and pressure parameters are achieved in the two types of barrels. This has application in the development and standardization of new kinds of barrels and weapons.
Editor
Science Progress
Fecha de publicación
12 de mayo de 2021
Tipo de publicación
Artículo
Recurso de información
Fuente
0036-8504
2047-7163
Idioma
Inglés
Relación
104
2021
2
https://doi.org/10.1177/00368504211016954
Audiencia
Estudiantes
Investigadores
Repositorio Orígen
REPOSITORIO INSTITUCIONAL DE LA UAEM
Descargas
384