COMPARISON OF NATURAL FREQUENCIES OF LAMINATES BY 3-D THEORY, PART I: RECTANGULAR PLATES

The three-dimensional theory of laminated plates and shells has been developed by Chao et al.[10–13, 62, 63] with many applications to impact and shock modal analyses. In this research, a complete survey of the literature is made on the free vibration natural frequencies of simply supported rectangular plates. Various boundary conditions are composed of fixed pin, hinge-roller, and sliding pin supported edges. The lowest frequencies are obtained in the present study in comparison with those in earlier studies as a result of the close natural state reached in keeping with the three-dimensional boundary and interlaminar continuity conditions via a 3-D augmented energy variational approach.