Effect of position of partial load on buckling and vibration characteristics of composite panels with circular cutouts

Abstract In this, the effect of different positions of partial ledge loads on buckling behavior of laminated panels with the centrally placed circular cutout is studied by developing finite element formulation using 9 - noded heterosis element. The formulation includes the effect of shear deformation and rotary inertia. The effect of various parameter such as cutout size, ply-orientation and thickness of the panel included in this work to study the buckling behavior of each parameter in detail. It is observed that the buckling resistance of the panel decreases with the increase in cutouts size irrespective of position of partial load. However, the position of partial load at extreme ends show higher buckling resistance as compared to that of centrally placed edge loads, irrespective of cutout size. Further, cross-ply symmetric laminates show extremely higher and least buckling resistance, when partial load acting at the extreme edges and at the center of the partial edges respectively, as compared to all other layup schemes.