Accession Number : ADP006019

Title :   State of the Art of Solid Propellant Rocket Motor Grain Design in the United States,

Corporate Author : AIR FORCE ROCKET PROPULSION LAB EDWARDS AFB CA

Personal Author(s) : Thrasher, Durwood I.

Report Date : APR 1988

Pagination or Media Count : 21

Abstract : This paper begins with a brief discussion of the basic ground rules and overall considerations in solid rocket motor design. This discussion includes ballistic design considerations, grain features related to ballistic design and their purposes, primary factors which determine stress and strain levels, and design approaches for avoiding structural weak points. The major section of the paper deals with solid rocket motor propellant grain structural integrity assurance, including materials characterization, structural analysis, and structural capability verification. The topics addressed include viscoelastic material behavior and the requisite thermomechanical characterization testing and analysis approaches; failure criteria and the appropriate testing approaches; experimental structural methods, including in-situ stress and strain measurement technology; and service life considerations.

Descriptors :   *ROCKET PROPELLANT GRAINS, SOLID ROCKET PROPELLANTS, SOLID PROPELLANT ROCKET ENGINES, STRESS STRAIN RELATIONS, MEASUREMENT, STRUCTURAL PROPERTIES, STRUCTURAL ANALYSIS, METHODOLOGY, INTERIOR BALLISTICS, VISCOELASTICITY, THERMOMECHANICS, LIFE EXPECTANCY(SERVICE LIFE), FAILURE, TEST METHODS, UNITED STATES.

Subject Categories : Solid Rocket Propellants

Distribution Statement : APPROVED FOR PUBLIC RELEASE