Accession Number:

AD0840021

Title:

EXTENSION OF PHOTOELASTIC DESIGN DATA TO CASE-BONDED GRAINS AND AXISYMMETRIC GEOMETRIES.

Descriptive Note:

Final rept.,

Corporate Author:

MATHEMATICAL SCIENCES NORTHWEST INC BELLEVUE WA

Personal Author(s):

Report Date:

1968-09-01

Pagination or Media Count:

117.0

Abstract:

A temperature-pressure equivalent is derived, which yields a solution to a large class of elastic problems for internal pressurization directly from the thermal solution. The inverse is also true. Expressions are derived which show the effect of nonzero axial strain on assumed plane strain problems. A series of computer solutions for case-bonded rockets have been obtained. A new pseudo two-dimensional method of testing axisymmetric geometries is described. This method is applied to the parametric investigation of conicyl geometries, and the resulting maximum stress for either thermal or pressure loading as a function of the various parameters is given. The most important parameter is found to be Poissons ratio of the propellant material. The variation with this parameter is also determined. Some comments are presented on an integrated ballistic and structural integrity design procedure. It is shown that the nomenclature used by the ballistician and the structural analyst is equivalent. A design performance plot is generated which allows a trade-off between ballistic and structural parameters to be made in the very earliest stages of design. Author

Subject Categories:

  • Solid Rocket Propellants

Distribution Statement:

APPROVED FOR PUBLIC RELEASE