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Steel and Composite Structures
  Volume 32, Number 6, September25 2019 , pages 821-832

Isogeometric thermal postbuckling of FG-GPLRC laminated plates
Y. Kiani and M. Mirzaei

    An analysis on thermal buckling and postbuckling of composite laminated plates reinforced with a low amount of graphene platelets is performed in the current investigation. It is assumed that graphaene platelets are randomly oriented and uniformly dispersed in each layer of the composite media. Elastic properties of the nanocomposite media are obtained by means of the modified Halpin-Tsai approach which takes into account the size effects of the graphene reinforcements. By means of the von Kármán type of geometrical nonlinearity, third order shear deformation theory and nonuniform rational B-spline (NURBS) based isogeometric finite element method, the governing equations for the thermal postbuckling of nanocomposite plates in rectangular shape are established. These equations are solved by means of a direct displacement control strategy. Numerical examples are given to study the effects of boundary conditions, weight fraction of graphene platelets and distribution pattern of graphene platelets. It is shown that, with introduction of a small amount of graphene platelets into the matrix of the composite media, the critical buckling temperature of the plate may be enhanced and thermal postbuckling deflection may be alleviated.
Key Words
    thermal postbuckling; graphene platelets; NURBS-based isogeometric analysis; Halpin-Tsai rule; nanocomposite
(1) Y. Kiani:
Faculty of Engineering, Shahrekord University, Shahrekord, Iran;
(2) M. Mirzaei:
Department of Mechanical Engineering, Faculty of Engineering,University of Qom, Qom, Iran.

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