Buckling Mode Interaction in Composite Plate Assemblies

[+] Author and Article Information
Ioannis G. Raftoyiannis, Ever J. Barbero

Department of Mechanical and Aerospace Engineering, W Virginia University, Morgantown WV 26506-6106 USA

Luis A. Godoy

Department of Civil Engineering, University of Puerto Rico, Mayaguez, Puerto Rico

Appl. Mech. Rev 48(11S), S52-S60 (Nov 01, 1995) doi:10.1115/1.3005083 History: Online April 29, 2009


The analysis of buckling mode interaction of fiber-reinforced composite columns, modeled as plate assemblies, is presented. The main assumptions are linear elasticity; a linear fundamental equilibrium path; the existence of critical states that are coincident or near coincident; and a coupled path rising from a quadratic combination of modal displacements due to interaction. The formulation adopted is known as the W-formulation, in which the energy is written in terms of a sliding set of incremental coordinates, measured with respect to the fundamental path. The energy is then expressed with respect to a reduced modal coordinate basis, and the coupled solution arising from interaction is computed. An example of a pultruded composite I-column subjected to axial compression illustrates the procedure.

Copyright © 1995 by The American Society of Mechanical Engineers
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