Damping characteristics of glass fiber reinforced composite with viscoelastic layers

Vibration and the composite material are two wildest growing research topics. The structural component subject to dynamic loading in their working life it causes vibration. It is very important in designing a structure to predict the vibration behavior in advance and to take necessary steps to control the structural vibration and its amplitude. Viscoelastic embedded composite material has been emphasized as an effective designing parameter for increasing damping performance of composite structure. This work presents Experimental and analytical model for energy dissipation in composite laminates embedded with viscoelastic layers at optimal position. Five different configurations for the embedded composite laminates had been fabricated as per ASTM Standards and have been compared with untreated specimen for vibration damping, strength, stiffness. The elastic and dissipative material function for shear modes has been experimentally characterised for the constituents of embedded laminates. The effects of damping layers for fiberreinforced composite materials and location of viscoelastic layers on the loss factor and frequency of treated composite has been studied. Interleaving damping layers at various locations and numbers of layers shows dramatic enhancement in damping characteristics with permissible reduction in strength and stiffness.