By considering that the total transverse displacement of a sandwich plate is the sum of the displacement due to bending of the plate and that due to shear deformation of the core, a 36-degree-of-freedom, high precision, higher-order triangular plate element was developed for the thermal buckling analysis of a rectangular composite sandwich plate. Numerical results show that the buckling mode that a sandwich plate will buckle into is dependent on the fiber orientation in the faces and the aspect ratio of the plate. For the square sandwich plate with angle-ply laminated faces, the highest critical buckling temperature is obtained with fibers orientated at 45°. For the rectangular [(±θ)2/core] s sandwich plate with an aspect ratio greater than 2, orientating the fibers in the faces to an angle around 63° will give the highest critical buckling temperature.
Keywords: Buckling; Composite sandwich plate; Temperature
Ref: Le-Chung and Kuo, Shih-Yao, “Thermal Buckling of Composite Sandwich Plates,” Mechanics based Design of Structures and Machines, Vol. 32, No. 1, 2004, pp. 57–72. (SCI, EI)
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