Paper number 547
|DESIGN OF HYBRID LAMINATED COMPOSITE SANDWICH PANELS FOR MAXIMUM BUCKLING LOADS: THE INFLUENCE OF THERMAL ACTIONS|
Maria Antonietta AIELLO1 and Luciano OMBRES2
1,2Department of Materials Science, University of Lecce,
Via per Arnesano, 73100 Lecce, Italy
|Summary||In the paper, the better arrangement of sandwich flat panels made with hybrid laminated faces is analyzed in order to maximize the local buckling loads in presence of in-plane and/or thermal loads. Laminated hybrid faces, generally unsymmetric and made with outer high stiffness layers and inner low stiffness layers, are modeled as composite plates resting on an elastic two-parameter foundation. Using the First Order Shear Deformation Theory in conjunction with the Rayleigh-Ritz method, buckling loads are obtained by an energetic algorithm as a solution of a standard eigenvalue problem. Results of the analysis evidence as: i) the hybridisation of laminated faces furnishes a good improvement of the buckling loads also for low percentage of high stiffness materials; ii) the better arrangement of outer high stiffness layers are depending on both in-plane loads combinations and thermal loads; iii) thermal actions, in some cases, can drastically reduce the buckling loads.
||Keywords|| sandwich panels, hybrid faces, thermal actions, buckling loads.
Theme : Composite Structures ; Modelling
[ HOME ] [ BACK ]