Abstract: In any mechanical and structural systems, the materials used and its properties plays a major role in their behavior to the mechanical and dynamic loadings. The advanced structural materials are designed and manufactured in the purview of enhanced properties like high strength to low weight ratio, vibration and its damping characteristics etc. One of the important purposes of vibration study is to reduce vibration through proper design of machine components or structural materials. In this context, the present study is focused on the hybrid composite laminates with the Epoxy as polymer matrix and Glass fibers/Kevlar fibers as reinforcements, which is finding applications widely for its high strength to low weight ratio. Present work is intended to study the vibration and damping characteristics of the hybrid composites laminates along with mechanical properties. The work is also intended to study the tensile behaviour, impact strength, flexural strength and the inter-laminar shear strength of the hybrid and non hybrid Glass fiber and Kevlar fiber reinforced epoxy polymer composites. It is observed that, impact strength is higher in hybrid composite of one-on-one kevlar/glass reinforced laminate. The flexural and the interlaminar shear strength are higher in the non hybrid glass fiber reinforced laminate. The tensile strength of the hybrid composite with one-on-one kevlar glass reinforcement is higher than others. In the vibration study, the non hybrid Kevlar reinforced laminate has higher damping properties than the non hybrid glass fiber reinforced composite. The glass fiber reinforced laminate has lowest damping property due to its brittle nature.

Keywords: Kevlar/ Glass-epoxy PVA (Poly Vinyl Alchohol), Hybrid composite, Vibration-damping, Cantilever beam test.