Wrinkling and Edge Buckling in Orthotropic Sandwich Beams
Publication: Journal of Engineering Mechanics
Volume 134, Issue 6
Abstract
A sandwich beam buckling problem is studied here using two-dimensional elasticity to model the beam constituents. The global and local instability of such a beam with orthotropic constituents under various boundary conditions are investigated. The face sheet and the core are assumed to be linear elastic orthotropic continua. General buckling deformation modes of the sandwich beam subjected to uniaxial compressive loading are considered. The appropriate incremental stress and conjugate incremental finite-strain measure for the instability problem of the sandwich beam, and the corresponding constitutive model are addressed. It is shown that a sandwich beam having a core with a negligible stiffness compared to the face sheets is prone to fail by edge buckling. The present analysis is compared with several previous analytical studies and corresponding experimental results. Finite-element analyses are carried out for comparison against the theoretical predictions. The formulation used in the finite-element code is discussed in relation to the formulation adopted in the theoretical derivation.
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References
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Information & Authors
Information
Published In
Journal of Engineering Mechanics
Volume 134 • Issue 6 • June 2008
Pages: 455 - 461
Copyright
© 2008 ASCE.
History
Received: Nov 14, 2006
Accepted: Nov 1, 2007
Published online: Jun 1, 2008
Published in print: Jun 2008
Notes
Note. Associate Editor: Khaled W. Shahwan
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