Buckling Analysis of FRP‐Faced Anisotropic Cylindrical Sandwich Panel

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Abstract
Force‐deformation relations of a cylindrically curved symmetric anisotropic sandwich plate are derived using Castigliano's theorem of minimum complementary energy. With these constitutive relations, the Rayleigh‐Ritz method is applied for the buckling analysis of an FRP‐faced curved sandwich plate under combined axial and bending loads. The buckling load coefficients of a sandwich plate with a typical fiberglass reinforced face sheets are presented by varying the parameters, e.g., aspect ratio, core to face thickness ratio, fiber orientation angle, and bending load coefficient. The results show that: (1) The buckling strength is maximum when the fiber orientation is about 40° with respect to circumferential direction; and (2) the buckling response is very sensitive to the combined effect of low aspect ratio, low radius, and bending load coefficient.

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