A.R Albooyeh - Assistant Professor, School of Engineering, University of Damghan, Damghan, ۳۶۷۱۶۴۱۱۶۷ Iran

In this paper, vibration characteristics of polypropylene (PP) reinforced with Short Glass Fibers (SGFs) werestudied. A series of composites with varying degree of fiber weight percentage (15-45 wt.%) were prepared using themelt-compounding technique with a twin-screw extruder and injection molded machine. Free vibration behavior ofsamples with free-clamp Boundary condition was studied by using of Operational Modal Analysis (OMA) technique.The experimental observations show that addition of SGF particles to PP increase the natural frequency (stiffness)significantly and decrease the damping factor of neat PP. Scanning electron microscopy was applied to assess thefracture surface morphology and dispersion of the particles. The observations show that the particles are well dispersedin the polymer matrix.

Vibration properties, Damping ratio, Polypropylene, Short Glass Fiber Particles