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Ji, Wooseok
Composite Materials and Structures Lab
Research Interests
  • Mechanics of composites
  • In situ experiments
  • Fracture mechanics
  • Computational solid mechanics
  • Advanced finite element methods
  • Static and dynamic stability of structures

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Global and local buckling of a sandwich beam

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Title
Global and local buckling of a sandwich beam
Author
Ji, WooseokWaas, Anthony M.
Keywords
sandwich structures; axial compression; elasticity; finite elements; beams
Issue Date
2007-02
Publisher
ASCE-AMER SOC CIVIL ENGINEERS
Citation
JOURNAL OF ENGINEERING MECHANICS-ASCE, v.133, no.2, pp.230 - 237
Abstract
A two-dimensional mechanical model is developed to predict the global and local buckling of a sandwich beam, using classical elasticity. The face sheet and the core are assumed as linear elastic isotropic continua in a state of planar deformation. The core is assumed to have two deformation modes: antisymmetrical and symmetrical with respect to the core geometric midplane. Characteristics of the two deformation modes and the corresponding buckling behavior are shown and it appears that they are identical when the buckling wavelength is short. The present analysis is compared with various previous analytical studies and corresponding experimental results. On the basis of the model developed here, validation and accuracy of several previous theories are discussed for different geometric and material properties of a sandwich beam. The results presented in this paper, verified through finite-element analysis and experiment, are an accurate prediction of the overall buckling behavior of a sandwich beam, for a wide range of material and geometric parameters.
URI
https://scholarworks.unist.ac.kr/handle/201301/9574
DOI
10.1061/(ASCE)0733-9399(2007)133:2(230)
ISSN
0733-9399
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