The Effect of Stacking Sequence and Layer Number on the Natural Frequency of Composite Laminated Plate

Author: Junaid Kameran Ahmed^1
1Ishik University, Erbil, Iraq

Abstract:  By depending on 1^st order shear deformation theory, a Graphite Epoxy composite plate has been analyzed dynamically in the present work by using a quadratic element (8-node diso parametric). Every node in this element has 6-degree of freedom (movement in x,y and z axis and rotation about x ,y and z axis ). The dynamic analysis covered parametric studies on a composite laminated plate (square plate) to determine its effect on the natural frequency of the plate. The parametric study was represented by a set of changes (layer number, boundary conditions, layer orientation, and the symmetry of layer orientation) and the plates were simulated by using ANSYS package 12. The boundary conditions considered in this study, at all four edges of the plate, are simply supported and clamped boundary condition. The results obtained from ANSYS program show that the natural frequency for both simply supported increase through increasing the number of layers. And it is observed that the natural frequency of a composite laminated plate will change with the change of ply orientation.

Keywords: Laminated Plate, Orthotropic Plate, Square Plate, (Free Vibration) Natural Frequency, Composite (Graphite/ Epoxy)
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doi: 10.23918/eajse.v4i1sip131

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