Accession Number : ADP009070

Title :   Radial Stiffness Measurements of Several 120mm Projectiles.

Corporate Author : ARMY RESEARCH LAB ABERDEEN PROVING GROUND MD WEAPONS TECHNOLOGY DIRECTORATE

Personal Author(s) : Lyon, David H.

Report Date : SEP 1993

Pagination or Media Count : 21

Abstract : An experimental technique for statically determining the radial stiffness of projectiles is presented. This technique utilizes a length of gun tube into which a modified projectile is fitted. In the case of APFSDS rounds, which contact the bore at two locations, a flat area is machined into the subprojectile at each of these locations. A corresponding clearance hole is drilled through the sabot and gun tube. When assembled, the holes align to allow a bar to apply loads directly onto the subprojectile. The resulting load versus deflection measurements, taken at the points of load application, allow the extraction of radial stiffness values. In addition, deflection measurements at various locations over the projectile length were recorded in order to observe the longitudinal bending response. Accurate radial stiffness values are important parameters for in-bore gun dynamics models as the predictive capabilities of the codes are directly related to these numbers.

Descriptors :   *STIFFNESS, *ARMOR PIERCING AMMUNITION, BENDING, BORES, CLEARANCES, DEFLECTION, DYNAMICS, EXTRACTION, LENGTH, MEASUREMENT, MODELS, PARAMETERS, RESPONSE, RODS, SABOTS, SABOT PROJECTILES, FIN STABILIZED AMMUNITION, GUN BARRELS.

Subject Categories : Ballistics
      Ammunition and Explosives

Distribution Statement : APPROVED FOR PUBLIC RELEASE