Accession Number : AD0725043

Title :   Three Dimensional Grain Stress Analysis Using the Finite Element Method.

Descriptive Note : Final rept. Jul 70-Mar 71,

Corporate Author : THIOKOL CHEMICAL CORP BRIGHAM CITY UTAH WASATCH DIV

Personal Author(s) : Cook,William A.

Report Date : APR 1971

Pagination or Media Count : 59

Abstract : The report presents the theory used in the finite element 3D Grain Stress Analysis Computer Program. In particular, there is a discussion of the nodal point grid generators that are a part of the computer program. Also, the type of elements used and the derivation of the equations used for the stiffness matrix calculation are discussed. An extrapolation technique for calculating strains and stresses at the boundary is presented, and the successful use of the computer program for analyzing a production motor is illustrated. (Author)

Descriptors :   (*PROPELLANT GRAINS, STRESSES), (*STRESSES, *COMPUTER PROGRAMMING), STRAIN(MECHANICS), LEAST SQUARES METHOD, MAPPING(TRANSFORMATIONS), MATRICES(MATHEMATICS), POTENTIAL ENERGY, SURFACE TO SURFACE MISSILES

Subject Categories : Computer Programming and Software
      Ammunition and Explosives
      Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE