Accession Number : AD0286068

Title :   AN APPARATUS FOR MEASURING THE BULK MODULUS OF SOLID PROPELLANTS

Corporate Author : ARMY RESEARCH OFFICE WASHINGTON DC

Personal Author(s) : WOGSLAND, NEAL C

PDF Url : AD0286068

Report Date : Dec 1962

Pagination or Media Count : 18

Abstract : An apparatus was developed to measure the equilibrium bulk modulus of solid propellants and other visco-elastic materials at pressures between 0 and 2500 psig. Hydrostatic pressure is applied to a test sample in the high- pressure chamber of a pressure intensifier. Measurement of the volume displaced by the low-pressure end of the double piston provides high sensitivity in the measurement of the volume change in the high-pressure chamber. The measured isothermal modulus is sufficiently accurate for use in quasi-static stress analysis of solid-propellant rockets. In addition, the adiabatic bulk modulus can be estimated from pressure-volume-temperature data. Small voids in a propellant are vividly shown by a very fast initial rise in the curve of pressure vs. volume change.

Descriptors :   *SOLID ROCKET PROPELLANTS, DEFORMATION, ELASTIC PROPERTIES, HYDROSTATIC PRESSURE, MEASUREMENT, MECHANICAL PROPERTIES, STRYCHNOS ALKALOIDS, TEST EQUIPMENT

Subject Categories : Solid Rocket Propellants

Distribution Statement : APPROVED FOR PUBLIC RELEASE