Large amplitude free vibration of laminated composite shells with cutout

摘要: Purpose – To investigate the large amplitude free flexural vibration of doubly curved shallow shells in presence cutouts.Design/methodology/approach Finite element model using an eight‐noded C0 continuity, isoparametric quadrilateral is employed. Nonlinear strains von Karman type are incorporated into first‐order shear deformation theory.Findings Cylindrical shell shows mostly hard spring behavior whereas spherical both and soft with increase ratios for different cutout sizes, radii curvature thickness parameters. At a particular value ratio, frequency ratio governed by interactive effects stiffness mass.Practical implications Aircraft, spacecraft many other structures where panels used, undergo nonlinear vibrations.Originality/value The paper will assist researchers elastic systems.