Simplified and refined finite element approaches for determining stresses and internal forces in geometrically nonlinear structural analysisTwo methods for determining stresses and internal forces in geometrically nonlinear structural analysis are presented. The simplified approach uses the mid-deformed structural position to evaluate strains when rigid body rotation is present. The important feature of this approach is that it can easily be used with a general-purpose finite-element computer program. The refined approach uses element intrinsic or corotational coordinates and a geometric transformation to determine element strains from joint displacements. Results are presented which demonstrate the capabilities of these potentially useful approaches for geometrically nonlinear structural analysis.
Document ID
19790044248
Acquisition Source
Legacy CDMS
Document Type
Conference Proceedings
Authors
Robinson, J. C. (NASA Langley Research Center Structures and Dynamics Div., Hampton, Va., United States)
Date Acquired
August 9, 2013
Publication Date
January 1, 1979
Subject Category
Structural Mechanics
Report/Patent Number
AIAA PAPER 79-0746
Meeting Information
Meeting: Structures, Structural Dynamics, and Materials Conference