Abstract

In this research, the effect of powder reinforcement on the natural frequency of unidirectional and woven hyper composite material beam was studied. The study of natural frequency was evaluated with three methods, the first is theoretical method with driving of the general equation of beam motion with shear deformation and rotary inertia effects, the second is driving of the general equation of motion for single degree of freedom beam, and the third is the numerical method with finite element method by using Ansys program Ver. 14. The study included the powder reinforcement volume fraction effect for hyper composite material beams of the following types: unidirectional, woven hyper composite beams with different volume fractions of fiber. Polyester and epoxy materials were used as resin materials for hyper composite materials. The natural frequency results of hyper composite beam with different volume fractions of reinforcement effect showed that the addition of reinforcement powder increases the strength of composite materials, and then, increases the natural frequency of beam. In addition, the evaluated results with theoretical methods and numerical method are compared and it showed a good agreement with maximum error about (1.8%).