Abstract
In this study, the multilayer composite plates consist from aluminum, brass,
and steel with unsaturated polyester Resin (UPE) as a core material. The plates having a
central circular, elliptical holes. The buckling parameters such as aspect ratios and
different hole orientation angles have been analyzed numerically.These parameters have
been applied at different layers of materials both metallic and non metallic. Analyses
were carried out using finite element method (FEM) through the application of special
numerical program written in APDL by ANSYS software. Result shows that the
buckling load were highly dependent on the type of composite material, and the
buckling load increased by increasing elliptical hole orientation angle. Increasing of
major and minor diameters of elliptical holes with plate b/w ratios were decrease the
buckling load for the multilayer composite plate
