Dynamic behaviour of perforated laminated panels under biaxial non-uniform edge loads based on FE approach

Buckling loads of laminated panels are calculated by analytical approaches are usually based on the assumptions that the panels are subjected to uniform in-planes edge loads without cutouts, despite of the fact that real structural components are subjected to various kinds of non-uniform in-plane edge loads along with the different sized cutouts. The aim of this work is to investigate the effect of biaxial non-uniform in-plane edge loads on the vibrations and buckling behaviour of panel with and without circular cutouts by using finite element technique. Further, the effect of different ply-orientations, boundary conditions and cutout sizes are also addressed in this work. Towards this, a nine-noded heterosis plate element has been adopted to model the panel by incorporating the effect of shear deformation and rotary inertia. Finally, it is shown that the non-uniform edge loading, boundary condition and cutout sizes have a remarkable effect on the vibration and buckling behavior of panel. (C) 2020 Elsevier Ltd. All rights reserved.