Accession Number : AD0727038

Title :   Composite Propellants: Statistical Evaluation of Brittle Point (Embrittlement Temperature) Tests.

Descriptive Note : Technical note,

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

Personal Author(s) : Bryant,R. W.

Report Date : NOV 1970

Pagination or Media Count : 15

Abstract : Embrittlement temperatures of composite propellants, at nominal uniaxial strains of 5, 10 and 25 per cent, have been measured by two bending beam methods, and the results compared statistically with interpolations from WLF master curves of rupture strain in tension against log reduced strain-rate. Effective strains are deduced which place the majority of the embrittlement temperature values within the scatter of the WLF master curves. It is concluded that the relatively simple embrittlement tests yield measurements of the strain at rupture no more variable than those derived from a similar number of uniaxial tensile tests. (Author)

Descriptors :   (*TEST EQUIPMENT, RELIABILITY), (*COMPOSITE PROPELLANTS, EMBRITTLEMENT), DEFECTS(MATERIALS), CRACKS, TEMPERATURE, STRAIN(MECHANICS), TENSILE PROPERTIES, TEST METHODS

Subject Categories : Mechanics
      Solid Rocket Propellants

Distribution Statement : APPROVED FOR PUBLIC RELEASE