Accession Number : AD0868870

Title :   Cumulative Damage Studies of Conventional-Cast Composite-Modified Double-Base Propellant.

Descriptive Note : Final rept. 1 Nov 68-1 Dec 69,

Corporate Author : HERCULES INC MAGNA UT BACCHUS WORKS

Personal Author(s) : Anderson, J. McKay

Report Date : FEB 1970

Pagination or Media Count : 179

Abstract : This report describes results from a one-year study of cumulative damage mechanisms in conventional-cast, composite-modified, double-base (CMDB) propellant. Testing was performed on Hercules' FKM propellant, which is a typical member of the CMDB propellant family. Test data were correlated to provide usable design envelopes depicting CMDB propellant damage as a function of the number of loading cycles and the level of loading. Major emphasis in the program was placed on extensive propellant testing and phenomenological aspects of the failure process. During the course of the program, 433 tests were performed to investigate the applicability of several well-known failure criteria and to develop usable design envelopes. None of the failure criteria investigated were generally applicable to the propellant, but all demonstrated at least qualitative applicability in some instances. (Author)

Descriptors :   (*CASTING, DOUBLE BASE ROCKET PROPELLANTS), (*DOUBLE BASE ROCKET PROPELLANTS, STRESSES), THERMAL STRESSES, LOADS(FORCES), STRAIN(MECHANICS), TENSILE PROPERTIES, FAILURE(MECHANICS), DAMAGE ASSESSMENT, ROCKET PROPELLANT GRAINS.

Subject Categories : Mechanics
      Solid Rocket Propellants

Distribution Statement : APPROVED FOR PUBLIC RELEASE