Accession Number : AD0737357

Title :   ASAAS: Asymmetric Stress Analysis of Axisymmetric Solids with Orthotropic, Temperature-Dependent Material Properties That Can Vary Circumferentially.

Descriptive Note : Technical rept.,

Corporate Author : AEROSPACE CORP SAN BERNARDINO CALIF SAN BERNARDINO OPERATIONS

Personal Author(s) : Crose,James G.

Report Date : 29 DEC 1971

Pagination or Media Count : 275

Abstract : The finite element method for the determination of stresses and displacements in arbitrary axisymmetric solids is extended to problems involving asymmetric mechanical and thermal loads and materials with asymmetric temperature-dependent mechanical properties. All dependent variables, including the mechanical properties, are represented by a Fourier series expansion of the circumferential coordinate. Due to the mechanical property variation in the circumferential direction, the resulting equation set becomes fully coupled and must be solved simultaneously. By grouping all Fourier coefficients together at each nodal point, a banded stiffness matrix is achieved for which an efficient solution is feasible by the use of a blocked square root Cholesky method. A user-oriented computer program based on the method of analysis is described and applied to several example problems to verify accuracy and demonstrate the versatility of the program. (Author)

Descriptors :   (*STRESSES, *COMPUTER PROGRAMS), BODIES OF REVOLUTION, THERMAL STRESSES, STRAIN(MECHANICS), LOADS(FORCES), FOURIER ANALYSIS, SERIES(MATHEMATICS), MATRICES(MATHEMATICS)

Subject Categories : Computer Programming and Software
      Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE