Local Delamination Buckling of Laminated Composite Beams Using Novel Joint Deformation Models
Publication: Journal of Engineering Mechanics
Volume 136, Issue 5
Abstract
Local delamination buckling formulas for laminated composite beams are derived based on the rigid, semirigid, and flexible joint models with respect to three bilayer beam (i.e., conventional composite, shear-deformable bilayer, and interface-deformable bilayer, respectively) theories. Two local delamination buckling modes (i.e., sublayer delamination buckling and symmetrical delamination buckling) are analyzed and their critical buckling loads based on the three joint models are obtained. A numerical finite-element simulation is carried out to validate the accuracy of the formulas, and parametric studies of delamination length ratio, the transverse shear effect, and the influence of interface compliance are conducted to demonstrate the improvement of the flexible joint model compared to the rigid and semirigid joint models. The explicit local delamination buckling solutions developed in this study facilitate the design analysis and optimization of laminated composite structures and provide simplified and improved practical design equations and guidelines for buckling analyses.
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Acknowledgments
This study was partially supported by the National Science Foundation (Grant No. DUE0717837) and Composite Materials and Engineering Center (CMEC) at Washington State University.
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Information & Authors
Information
Published In
Journal of Engineering Mechanics
Volume 136 • Issue 5 • May 2010
Pages: 541 - 550
Copyright
© 2010 ASCE.
History
Received: Aug 4, 2008
Accepted: Sep 28, 2009
Published online: Sep 30, 2009
Published in print: May 2010
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