Accession Number : AD0804923

Title :   STUDY AND DEMONSTRATION OF PAPER PHENOLIC COMPONENTS.

Descriptive Note : Quarterly rept. no. 2, 1 Sep-30 Nov 66,

Corporate Author : MORTON THIOKOL INC ELKTON MD ELKTON DIV

Personal Author(s) : Edwards, John W. ; Singer, Vic ; Mueller, F. W.

Report Date : 09 JAN 1967

Pagination or Media Count : 61

Abstract : The mechanical, thermal, and mass properties of convolute-wrapped paper phenolic tubing have been determined and a satisfactory technique has been developed for performing a stress analysis. Flexural effects discredited the NOL Split Disc Apparatus and required the development of a new technique for determining hoop tensile properties. The new technique consisted of a uniaxial hydroburst of the NOL Ring Specimen and was proven to be reliable. The stress-strain relationship of paper phenolic laminates was found to be nonlinear and to be most conveniently represented by the secant modulus. This nonlinear relationship and the anisotropic character of the material make a regorous stress analysis extremely tedious, and led to the development of an adequate technique for the analysis of discontinuities. This experimentally proven technique uses thin wall approximations and the substitution of hypothetical, equivalent, linearly elastic, isotropic materials. A thermal gradient test was performed on a simulated paper phenolic case motor but the analysis is not complete. Tests have shown that the materials properties are degraded by humidity and salt spray but not by the other evironments investigated. An epoxy-amide coating will provide protection from humidity and salt spray. (Author)

Descriptors :   *PAPER), (*PHENOLIC PLASTICS, SOLID PROPELLANT ROCKET ENGINES), (*LAMINATED PLASTICS, (*ROCKET ENGINE CASES, FEASIBILITY STUDIES), STRESSES, ANALYSIS, FLEXURAL STRENGTH, STRAIN(MECHANICS), TENSILE PROPERTIES, PROTECTION, HUMIDITY, SALT SPRAY TESTS, DEGRADATION, PROTECTIVE TREATMENTS, PRESSURE VESSELS, SHEAR STRESSES, O RINGS, COMPRESSIVE PROPERTIES, POLYAMIDE PLASTICS, EPOXY RESINS, BONDING, ADHESIVES, STEEL, ALUMINUM.

Subject Categories : Laminates and Composite Materials
      Solid Propellant Rocket Engines

Distribution Statement : APPROVED FOR PUBLIC RELEASE