Accession Number:

AD0609747

Title:

THERMAL GRAIN STRUCTURAL ANALYSIS.

Descriptive Note:

Program progress rept. no. 5, 1-30 Apr 62,

Corporate Author:

LOCKHEED PROPULSION CO REDLANDS CALIF

Personal Author(s):

Report Date:

1962-04-30

Pagination or Media Count:

40.0

Abstract:

An engineering approximation to the correct theoretical temperature distribution in a propellant grain has been derived. A set of confirmatory experiments to the approxi mation is described. These experiments are in progress. The limit elastic solutions to several thermal stress problems are presented. These limit solutions are necessary in order to recognize the existence of the hypothesized stress accumulation problem. Experimental results of cyclic thermal inputs to a uniaxial, end-constrained bar are presented. The claim is made herein that the above test results confirm the hypothesis that there exists a cyclic thermal input whereby the resulting stresses exceed those obtained by a step input over the same temperature range. This confirmation is the crux of the purpose of this program. Finally, a rather comprehensive discussion of theory and experiment relative to the timetemperature shift phenomena is presented. Author

Subject Categories:

Distribution Statement:

APPROVED FOR PUBLIC RELEASE