Accession Number:

ADA063613

Title:

Approximate Finite-Element Method of Stress Analysis of Non-Axisymmetric Configurations.

Descriptive Note:

Final rept. Mar 76-Jun 77,

Corporate Author:

ILLINOIS UNIV AT URBANA-CHAMPAIGN DEPT OF AERONAUTICAL AND ASTRONAUTICAL ENGINEERING

Personal Author(s):

• Zak,Adam R.
• Craddock,James N.

Report Date:

1978-11-01

Pagination or Media Count:

34.0

Abstract:

A finite element method of analysis is developed for structural configurations which are derived from axisymmetric geometries but contain definite nonaxisymmetric features in the circumferential direction. The purpose of the present analysis is to develop a method which will take into consideration the fact that the stress and strain conditions in these geometries will be related to the corresponding axisymmetric solution. To analyze these structures the geometry is divided into several segments in the r-theta plane. The axisymmetric displacements are obtained for each segment by solving a related axisymmetric configuration. A perturbation analysis is then performed to match the solutions at certain points between the segments, and obtain the perturbation displacements for the total structure. The total displacement is then the axisymmetric displacement plus the perturbation displacement. The stresses and strains are then calculated at any desired point once the total displacements are known. The method is applied to a number of examples to illustrate the accuracy of the method. The results of these examples are presented and discussed. Author

Descriptors:

• *STRESS ANALYSIS
• *FINITE ELEMENT ANALYSIS
• *STRUCTURAL ANALYSIS
• TWO DIMENSIONAL
• DISPLACEMENT
• ELASTIC PROPERTIES
• ASYMMETRY
• AXISYMMETRIC
• GEOMETRY
• PERTURBATIONS

Subject Categories:

• Structural Engineering and Building Technology
• Mechanics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE