Buckling Analysis of Composite Cylindrical Shell with Cutout Section

Abstract

In the construction of aerospace structures the use of cylindrical shell-type components with cut-out sections are unavoidable. The fact is prominent because the structural failure of these components commonly occurs at the cut-out because of high stress concentrations that begin to the cracks formation. Therefore, a cu-tout can cause a local failure at a load level which is less than the global failure load of a similar type shell without a cut-out section. Because of which the design sizing of a cylindrical shell with a cut-out is often based on the value of the stress near the cut-out. For the development of safe and reliable designs an accurate assessment of the stress concentrations in a given shell which is subjected to different kinds of loading is analysed.The objective of the present paper is to determine the stress and deformation values in a thin laminated composite cylindrical shell with an elliptical cut-out by buckling and static analysis. The cylindrical shell considered in this is effect of cut out in pressure vessels. The modeling of the cylindrical shell is done in Pro-E and analysis is carried out in ANSYS using solid and shell element. As Fiber-reinforced composite materials are more efficient and reliable structures for this application because of their high strength and specific modulus compared to other metallic materials. Therefore, materials used are Steel, S2 Glass Epoxy and Kevlar. 5 and 11 layers are used as layer stacking for composite materials S2 Glass and Kevlar.