Accession Number : ADA300842

Title :   Dynamic Response of Composite Gun Tubes Subjected to a Moving Internal Pressure.

Descriptive Note : Final rept. Jun 94-Jul 95,

Corporate Author : ARMY RESEARCH LAB ABERDEEN PROVING GROUND MD

Personal Author(s) : Tzeng, Jerome T. ; Hopkins, David A.

PDF Url : ADA300842

Report Date : OCT 1995

Pagination or Media Count : 49

Abstract : The dynamic response of a composite gun tube subjected to a moving pressure front is investigated. The flexural wave in the wall of the gun tube is modeled using both closed-form analytic and finite element methods. Results indicate that very high-amplitude and high-frequency strains are induced in the gun tube at the instant and location of projectile passage as the velocity of moving pressure front approaches the fundamental propagation velocity of the flexural wave. The dynamic effects are especially critical on overwrapped composite gun barrels because of the multi-material construction, anisotropy of material properties, potential thermal degradation of the composite materials due to gas propellant, and the design goals inherent in lightweight structure applications. Finally, this study illustrates the importance of dynamics fracture mechanisms in lightweight ballistic engineering applications. These results also illustrate some of the potential shoncomings of the static analysis methodology traditionally used in gun barrel design. (MM)

Descriptors :   *GUN BARRELS, *INTERIOR BALLISTICS, HIGH FREQUENCY, STRESS ANALYSIS, COMPOSITE MATERIALS, FINITE ELEMENT ANALYSIS, DEFORMATION, DYNAMIC RESPONSE, DISPLACEMENT, COMPOSITE STRUCTURES, STRAIN(MECHANICS), BENDING, GAS DYNAMICS, FRACTURE(MECHANICS), CYLINDRICAL BODIES, STRUCTURAL RESPONSE, ANISOTROPY, LIGHTWEIGHT, FLEXURAL PROPERTIES, THERMAL DEGRADATION, STATIC TESTS, AXIAL LOADS, GUN PROPELLANTS, TUBES, GUN MUZZLES, INTERNAL PRESSURE, MUZZLE VELOCITY.

Subject Categories : Guns
      Ballistics

Distribution Statement : APPROVED FOR PUBLIC RELEASE