Paper number 1262
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ON MULTIPLE DELAMINATION BUCKLING OF COMPOSITE STRUCTURES |
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. |