Buckling Analysis of Laminated Composites plates with Circular Cutout Using Experimental, Finite Elements and Semi Analytical Method

In the present study, semi-energy and FEM method have been done to determine the buckling behaviour of rectangular glass-epoxy composite with a central cut-off to demonstrate the accuracy of experimental results. The experimental results have been derived by an innovated SS-FF fixture. The effect of cut-off diameter and the number of layers on buckling load were investigated. For thin laminated composite plates subjected to pure loads, the buckling loads of these three methods are approximately equal. However, in the buckling analysis of thick laminated composite plates, experimental results having a little distance from FEM and semi-energy results. The results show that the buckling load decrease and increase with increasing and decreasing of cut-off diameter and the number of layers respectively. However, in the buckling analysis of thick laminated composite plates, experimental results having a little distance from FEM and semi-energy results. The results show that the buckling load decrease and increase with increasing and decreasing of cut-off diameter and the number of layers respectively.