Accession Number : ADA194688

Title :   Structure Limits for a 30mm Annular Piston.

Descriptive Note : Technical rept.,

Corporate Author : ARMY BALLISTIC RESEARCH LAB ABERDEEN PROVING GROUND MD

Personal Author(s) : Watson, Cris

PDF Url : ADA194688

Report Date : May 1988

Pagination or Media Count : 19

Abstract : General Electric Ordnance Systems Div has designed and fabricated at 30-mm regenerative liquid propellant gun (RLPG) system. The fixture was installed at the BRL in July, 1984. The fixture is now being used to evaluate liquid propellants and study various features of the RLPG cycle. The annular injection piston of hte RLPG was subjected to a stress analysis to determine if the existing design could be used in high performance firings. The piston was shown to fail under 558 MPa chamber pressure using finite-element stress analysis. This study concluded that the piston must be redesigned to reduce the unbalanced forces which exist across the thin shell portion of the piston wall before high performance firings with this fixture could be attempted.

Descriptors :   *PISTONS, *LIQUID GUN PROPELLANTS, *GUN COMPONENTS, FINITE ELEMENT ANALYSIS, FIRING TESTS(ORDNANCE), INJECTION, LIQUID PROPELLANTS, PRESSURE, SHELLS(STRUCTURAL FORMS), STRESS ANALYSIS, STRESS ANALYSIS, INTERIOR BALLISTICS, COMBUSTION CHAMBERS, IGNITERS, ULLAGE

Subject Categories : Ammunition and Explosives
      Guns

Distribution Statement : APPROVED FOR PUBLIC RELEASE