Use of global functions for improvement in efficiency of nonlinear analysisA method for improving the efficiency of nonlinear structural analysis by the use of global displacement functions is presented. The computer programs include options to define the global functions as input or let the program automatically select and update these functions. The program was applied to a number of structures: (1) 'pear-shaped cylinder' in compression, (2) bending of a long cylinder, (3) spherical shell subjected to point force, (4) panel with initial imperfections, (5) cylinder with cutouts. The sample cases indicate the usefulness of the procedure in the solution of nonlinear structural shell problems by the finite element method. It is concluded that the use of global functions for extrapolation will lead to savings in computer time.
Document ID
19810045004
Acquisition Source
Legacy CDMS
Document Type
Conference Proceedings
Authors
Almroth, B. O. (Lockheed Missiles and Space Co. Palo Alto, CA, United States)
Stehlin, P. (Lockheed Missiles and Space Co. Palo Alto, CA, United States)
Brogan, F. A. (Lockheed Research Laboratories Palo Alto, Calif., United States)
Date Acquired
August 11, 2013
Publication Date
January 1, 1981
Subject Category
Numerical Analysis
Report/Patent Number
AIAA PAPER 81-0575
Meeting Information
Meeting: Conference on Structures, Structural Dynamics and Materials