© 1983 by Oxford University Press
FREE VIBRATIONS OF ANTISYMMETRIC ANGLE-PLY LAMINATED CIRCULAR CYLINDRICAL PANELS
( Department of Mechanics, University of Ioannina Ioannina, Greece )
For the free-vibration problem of a general anisotropic laminated circular cylindrical panel, the Donnell-type equations of motion are quoted and expressed in terms of the panel middle-surface displacement components. For the case of an antisymmetric angle-ply laminated panel subjected to S3 simply-supported edge boundary conditions, these equations are solved by employing the method of Galerkin. Numerical results are presented for a family of graphite-epoxy regular antisymmetric angle-ply laminated circular cylindrical panels. The results confirm the expectation that for such a type of laminated composite the effect of stretching-bending coupling rapidly dies out as the number of layers increases. However, the panel seems to present a rather anomalous dynamic behaviour dependent on the values of both its shallowness and lamination angles, on the stretching-bending coupling phenomenon as well as on the type of the boundary conditions.