Investigation of effective parameter on out-of-plane and in-plane bending natural frequency of laminated composite beam

The Composites are used in industrial structural systems for decreasing weight and increasing specific stiffness and improvement of vibration characteristics. Beam analysis plays an important role in mechanical structural design, so that Finding free vibration characteristics of laminated composite beams (LCBs) is one of the bases for designing and modeling of industrial products. Anisotropy of these composites allows the designer to tailor the material in order to achieve the desired performance requirements to prevent of resonant that lead failure in structures. In this study the out of plane and in-plane vibration of Epoxy-glass laminated composite beam are investigated by Timoshenko and Euler Bernouli analytical theory. It should be noted that classical lamination theory is used to determine requirement bending stiffness. Then a finite element modeling are implemented in ANSYS and the validation of results are conducted. it is seen that the results are very close to each other. After that the effective parameter on natural frequency in x-y and x-z vibration plane such fiber angle and dimension of beam in three directions are discussed. Finally the special stacking sequence consistent with maximum natural frequency is obtained between several optional stacking