Accession Number : AD0468449


Title :   Biaxial Tensile Properties of Plastic Propellant


Corporate Author : EXPLOSIVES RESEARCH AND DEVELOPMENT ESTABLISHMENT WALTHAM ABBEY (UNITED KINGDOM)


Personal Author(s) : Cooke, S ; Vernon, J H


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/468449.pdf


Report Date : 14 May 1965


Pagination or Media Count : 35


Abstract : In a case-bonded rocket motor the propellant is often subjected to biaxial tensile straining, arising from thermal or pressurisation effects. The behaviour of propellants under biaxial straining differs from that under uniaxial straining, and special biaxial test techniques have to be devised. Plastic propellants have some biaxial characteristics in common with other types of propellant, and other which are peculiar to this type of propellant. An account is given of the way in which biaxial strains arise in certain types of plastic propellant motor, and of the testing techniques. They include spin testing, diaphragm testing and a development of the standard crack test. The effects of time, temperature, age hardening and asymmetry on biaxial properties were investigated. An account is given of the application of biaxial test results to design problems of the Bantam motor for the Skua meteorological rocket, and to the development of propellants for this application.


Descriptors :   *ROCKET PROPELLANT GRAINS , *SOLID PROPELLANT ROCKET ENGINES , *SOLID ROCKET PROPELLANTS , TENSILE PROPERTIES , TEST METHODS , STRAIN(MECHANICS) , FRACTURE(MECHANICS) , SPINNING(INDUSTRIAL PROCESSES) , THERMAL EXPANSION , FAILURE(MECHANICS) , PLASTICS , COMPRESSIVE PROPERTIES , DIAPHRAGMS(MECHANICS) , CRAZING , SOLID ROCKET PROPELLANT BINDERS , DEFORMATION , UNITED KINGDOM , STRESSES , MECHANICAL PROPERTIES


Subject Categories : Solid Propellant Rocket Engines
      Solid Rocket Propellants


Distribution Statement : APPROVED FOR PUBLIC RELEASE