Abstract
In this study, the effect of fiber orientations on the natural frequencies of the hybrid composite laminate (HCGFRE) that is consisted of sequential stacking of plain woven carbon fiber reinforced epoxy (CFRE) and plain woven glass fiber reinforced epoxy (GFRE) fibers was investigated. A finite element approach was carried out in order to determine the natural frequencies of hybrid composite laminate. Analyzes were performed using the LS-DYNA® software. In the finite element analysis, the natural frequencies corresponding to the first three modes were determined separately for each fiber orientation (00,300,450). Besides the modal analysis of hybrid composite laminates formed by sequential stacking of the same fiber orientations, the natural frequencies of hybrid composite laminates formed by stacking in different fiber orientations were also examined within the scope of the study. The same boundary conditions were applied for all fiber orientations since it is essential to study with a similar degree of freedom. In addition, the effect of the mesh sensitivity used in the finite element approach on the natural frequency is also considered. it is seen that both the change of fiber orientation and the stacking of composite plates with different fiber orientations directly affect the natural frequency values for all modes.
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