Abstract

This paper presents an analytical and numerical vibration analysis of hyper composite material beam utilizing shear deformation and rotary inertia. The hyper composite material used in this research is consists of long reinforcement fiber and composite matrix which is components are resin with short fiber. The vibration analysis of this hybrid composite material beam using development theory for the beam which the effect of transverse shear deformation and rotary inertia included. Where the results are the natural frequency and general equation of motion. Also the effect of volume fraction and types of short, long fiber and resin material on the natural frequency are investigated. The results shows the natural frequency of the hyper composite material beam increases with increase of the strength of fiber and with the increases of volume ratio of the long fiber (when uses short fiber and long fiber of the same kind).