Stability of Composite and Sandwich Struts by Mixed Formulation
Publication: Journal of Engineering Mechanics
Volume 130, Issue 7
Abstract
A unified mixed, higher-order analytical formulation is presented to evaluate the buckling of laminated composite struts. The formulation can also be used to evaluate the overall buckling and wrinkling loads of a general multilayer, multicore sandwich strut having any arbitrary sequence of stiff layers and cores. The usual assumptions of thin stiff layers and antiplane core are advantageously eliminated. Displacements as well as transverse stress continuities are enforced in the formulation by incorporating them as the degrees of freedom, thus avoiding separate calculations of the modal transverse stresses. Two sets of mixed models are proposed, based on individual layer and equivalent single layer theories, by selectively incorporating nonlinear components of Green’s strain tensor. Limitations of the equivalent single-layer theories and typical simplifying assumptions are highlighted. A parametric investigation is presented, concerning the influence of the material and geometric properties on the buckling behavior of a sandwich strut. A few recommendations are also made for the stability analysis of laminated composite struts.
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References
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Information
Published In
Journal of Engineering Mechanics
Volume 130 • Issue 7 • July 2004
Pages: 762 - 770
Copyright
Copyright © 2004 American Society of Civil Engineers.
History
Received: Dec 11, 2002
Accepted: Jan 12, 2004
Published online: Jun 15, 2004
Published in print: Jul 2004
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