Accession Number : AD0500921

Title :   Wire Reinforced Grain Delamination Evaluation.

Descriptive Note : Technical rept. Aug 67-Nov 68,

Corporate Author : NAVAL WEAPONS CENTER CHINA LAKE CALIF

Personal Author(s) : Alexander,E. L. ; Minnich,B. H. ; Caputo,A. A. ; Bryant,C. E.

Report Date : FEB 1969

Pagination or Media Count : 71

Abstract : This report documents the effort expended to define the critical conditions contributing to thick web wire reinforced grain (WRG) delamination, establish a solution, and verify by demonstration in high web fraction grains. A failure analysis of an existing delaminated WRG was conducted; and based on the resulting data, two thick web grains were fabricated. The first reinforced grain was made with conventional Butarez-based propellant and successfully survived three thermal cycles. The second grain, made with a new propellant formulation (ambient cure), delaminated on exposure to -65F in the second cycle.

Descriptors :   (*ROCKET PROPELLANT GRAINS, REINFORCING MATERIALS), (*SOLID ROCKET PROPELLANTS, FRACTURE(MECHANICS)), DESIGN, MANUFACTURING, AGING(MATERIALS), WIRE, CURING AGENTS (U) ALUMINUM ALLOYS, ISOCYANIC ACID, ESTERS, FILAMENT WOUND CONSTRUCTION, CARBOXYLIC ACIDS, BUTADIENES, FAILURE(MECHANICS), CRACKS, FURAN RESINS, ISOCYANATE PLASTICS

Subject Categories : Solid Rocket Propellants

Distribution Statement : APPROVED FOR PUBLIC RELEASE