Techno Press

Steel and Composite Structures   Volume 22, Number 1, September20 2016, pages 91-112
Thermal post-buckling behavior of imperfect temperature-dependent sandwich FGM plates resting on Pasternak elastic foundation
Merbouha Barka, Kouider Halim Benrahou, Ahmed Bakora and Abdelouahed Tounsi

Abstract     [Full Text]
    In this paper, post-buckling behavior of sandwich plates with functionally graded (FG) face sheets under uniform temperature rise loading is examined based on both sinusoidal shear deformation theory and stress function. It is supposed that the sandwich plate is in contact with an elastic foundation during deformation, which acts in both compression and tension. Thermo-elastic non-homogeneous properties of FG layers change smoothly by the variation of power law within the thickness, and temperature dependency of material constituents is considered in the formulation. In the present development, Von Karman nonlinearity and initial geometrical imperfection of sandwich plate are also taken into account. By employing Galerkin method, analytical solutions of thermal buckling and postbuckling equilibrium paths for simply supported plates are determined. Numerical examples presented in the present study discuss the effects of gradient index, sandwich plate geometry, geometrical imperfection, temperature dependency, and the elastic foundation parameters.
Key Words
    functionally graded materials; thermal post-buckling; sinusoidal shear deformation theory; elastic foundation; imperfection
(1) Merbouha Barka, Kouider Halim Benrahou, Ahmed Bakora, Abdelouahed Tounsi:
Material and Hydrology Laboratory, University of Sidi Bel Abbes, Faculty of Technology, Civil Engineering Department, Algeria;
(2) Abdelouahed Tounsi:
Laboratoire de Modélisation et Simulation Multi-échelle, Université de Sidi Bel Abbés, Algerie.

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