Accession Number : ADA323684

Title :   Cumulative Damage and Crack Growth in Solid Propellant. Phase I.

Descriptive Note : Final rept. Mar 88-Dec 96,

Corporate Author : PHILLIPS LAB EDWARDS AFB CA

Personal Author(s) : Liu, C. T.

PDF Url : ADA323684

Report Date : FEB 1997

Pagination or Media Count : 31

Abstract : This report covers results of research addressing the fracture and crack growth behavior of solid propellants in support of structural integrity methodology for the failure response of solid propellant rocket motors. The effects of damage, temperature, and strain rate on local behavior near the crack tip and crack growth behavior in solid propellants were investigated. Numerical modeling techniques were used to determine the local strain fields near the crack tip and the fracture parameters associated with crack growth. The results of both experimental and analytical analyses were evaluated and discussed.

Descriptors :   *STRESS STRAIN RELATIONS, *CRACK PROPAGATION, *ROCKET PROPELLANT GRAINS, MATHEMATICAL MODELS, NONDESTRUCTIVE TESTING, LIFE EXPECTANCY(SERVICE LIFE), FINITE ELEMENT ANALYSIS, DAMAGE ASSESSMENT, FRACTURE(MECHANICS), STRAIN RATE, ACOUSTIC ATTENUATION, FAILURE(MECHANICS), SOLID PROPELLANT ROCKET ENGINES, ULTRASONIC TESTS, CYCLIC LOADS, MICROCRACKING, COMPOSITE PROPELLANTS, STRUCTURAL INTEGRITY.

Subject Categories : Solid Rocket Propellants
      Properties of Metals and Alloys

Distribution Statement : APPROVED FOR PUBLIC RELEASE