In this study the differential quadrature method (DQM) is used to model the postbuckling analysis of imperfect laminated composite beams having multiple delaminations and subject to axial compressive load. The delaminations are considered to be through-the-width in an arbitrary locations, through-the-thickness and along the span of the beam. A nonlinear beam theory is used to formulate the problem. To model the delaminated beam, 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 nonlinear algebraic equations that are solved by an arc-length strategy. The contact effect between the delaminated surfaces and the delamination growth due to the opening of the delaminated sections under the compressive load were not considered in this study. To validate the integrity of the DQM, the numerical results obtained from a series of case studies are compared with those of the other published results. These comparisons would confirm the efficiency and accuracy of the DQM.
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