Vibration of delaminated beam-plates with multiple delaminations under axial forces

Buckling and vibration of delaminated composite orthotropic beam-plates wit h multiple delaminations have been studied using the reduced flexural stiff ness method. Series solutions of the governing equation of motion and the R itz method for beam-plates with both ends simply supported and clamped boun dary conditions are discussed. Some typical multiple delaminations, such as overlapping and nonoverlapping delaminations, are considered. Numerical re sults based on both methods for simply supported boundary conditions are fo und to be identical. It is found that the method is effective in analyzing the buckling and vibration of beam-plates with multiple delaminations.