Abstract
This paper evaluates numerically the dynamic behavior of structural composite laminate materials in relation to the angular change in fiber layers of the laminated composite. The behavior of the material is modeled through finite element method, where the First Order Shear Deformation Theory (FSDT) is used which is implemented on a rectangular element serendipity containing eight nodes. The mathematical modeling has been implemented using the commercial available software MATLAB®. Through numerical simulations, it will be possible to obtain the natural frequencies. And we will present a sensitivity analysis with respect to the fiber orientation parameter. Key words: Dynamic behavior, composite laminated plates, First Order Shear Deformation Theory (FSDT), fiber orientation parameter.
Highlights
Composite materials have been increasingly highlighted in recent decades due to its advantages to the traditional engineering materials, characterized by its low density associated with high strength/stiffness relation characteristics, and its anti-corrosion properties
The composite structural laminate consists of a layer stack attached to each other with the fibers oriented in different directions
In Equations (11) to (13) det J indicates the determinant of the Jacobian of the transformation from the in-plane physical variables x, y to the natural variables, and matrices C b k and C s k represent, respectively, the orthotropic bending and shear elastic matrices of the kth layer, which are constructed according to the Classical Laminate Theory (CLT) as follows:
Summary
Composite materials have been increasingly highlighted in recent decades due to its advantages to the traditional engineering materials (steel or aluminum), characterized by its low density associated with high strength/stiffness relation characteristics, and its anti-corrosion properties.A composite material can be defined when two or more different materials are combined together to create a superior and unique material, to obtain a set of properties that none of the components individual features (Mendonça, 2005). The composite structural laminate consists of a layer stack attached to each other with the fibers oriented in different directions. Based on what was stated above, the main objective of this article is the implementation numerical computation using the finite element method for composite plates and evaluates the influence of the stacking sequence of the layers composite in their dynamic behavior in terms of characterization of natural frequencies and vibration amplitudes.
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