Paper number 1262


Shapour Moradi1 and Farid Taheri2

1Department of Mechanical Engineering, Shaheed-Chamran University,
Ahvaaz, Iran
2Department of Civil Engineering, Dalhousie University
P.O. Box 1000, Halifax Nova Scotia, Canada B3J 2X4

Summary In this study the buckling response of a one-dimensional composite beam having multiple delaminations and subjected to axial compressive load is modelled by the method of differential quadrature. The delaminations are considered to be in arbitrary locations through-the-width, and along the span of the beam. A beam theory with shear deformation is used to formulate the problem. To model the problem, the beam is divided into a series of regions bounded by the delaminated segments. Using DQM, the system of equilibrium equations and the boundary conditions are transformed into a system of linear algebraic eigenvalue equations that are solved by a standard eigen-solver. The influences of several parameters that affect the buckling strength of such laminates are investigated. The numerical results obtained from a series of case studies are compared with those of the finite elements method and other published results. These comparisons confirm the efficiency and accuracy of the method.
Keywords composites, beams, buckling, differential quadrature, multiple-delaminations, shear-effect, numerical modeling.

Theme : Mechanical and Physical Properties ; Buckling

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