Interlaminar failure analysis of FRP crossply laminate with elliptical cutout

The present research work deals with the prediction of interlaminar failure indices in a four layered crossply laminate with elliptical cutout under cylindrical bending subjected to transverse pressure load using 3D finite element analysis. The commercial finite element analysis software ANSYS has been successfully executed and the finite element model is validated. The interlaminar failure indices are evaluated by varying the spantodepth ratio (A/h=s) and inplane aspect ratio (A/B) of the plate. It is observed that the end point on hole axis parallel to the supported edge of the plate is critical and the magnitude of the failure indices are increasing with respect to ‘s’ and A/B at top and bottom interfaces. At the middle interface, the failure index is decreasing with A/B and increasing with ‘s’. The present analysis will be useful in quantifying the effect of above said factors that helps in the safe and efficient design of the structural elements made of laminated FRP composites.