ON THE VIBRATION CHARACTERISTICS OF INTERLAMINATED HYBRID COMPOSITE PLATES.
Abstract
Hybrid and metal-matrix composites have been proposed as a design alternative to reduce the effects due to transverse shear deformations. Here, nonlinear governing equations, including the effects of transverse shear deformation and rotatory inertia, for free vibrations of interlaminated hybrid plates are presented. The governing equations are in terms of a force function and transverse displacement. Using Galerkin technique and principle of harmonic balance approximate solution to governing equations is formulated for a rectangular plate with edges clamped against transverse displacement and free from in plane forces. Numerical results for the ratio of nonlinear fundamental frequency to linear frequency of different interlaminated hybrid plates are presented. The effects of hybridization and of transverse shear deformations and rotatory inertia on the frequency-amplitude response is discussed.