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Design Sensitivity of Buckled Thin-Walled Composite Structural Elements

[+] Author and Article Information
Leonel I. Almánzar, Luis A. Godoy

Civil Infrastructure Research Center, Department of Civil Engineering, University of Puerto Rico, Mayaguez PR 00681-5000

Appl. Mech. Rev 50(11S), S3-S10 (Nov 01, 1997) doi:10.1115/1.3101848 History: Online April 20, 2009

Abstract

This paper presents a theory and applications to account for changes in the fundamental, buckling, and post-buckling states when design parameters of a composite material are modified. The influence of micro-mechanical parameters (the volume fraction and the fiber orientation) and of cross-sectional dimensions is investigated. A numerical example for columns made of composite materials is presented. Sensitivity is studied for local buckling loads. Explicit expressions are obtained for the sensitivities in the form of perturbation expansions. A beam under transverse load is also investigated, and geometric design parameters employed to investigate sensitivity. The information from the sensitivity analysis can be used to improve a design by modification of the buckling load.

Copyright © 1997 by American Society of Mechanical Engineers
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