Experimental Investigation on the Modal Response of FRP Composites

Estimating damping in structure composed of different materials (carbon, Kevlar fibres) and processes still remains as one of the most extreme vast challengers. The paper presents the structural damping effect on beam vibration by impact hammer. Structural damping contributes to about 0.3 – 0.5% of total system damping. The main objective of this work is to determine the natural frequency and damping ratio of cantilever beams of carbon and Kevlar fibres by M+P international SO Analyser and validate the result with the MAT LAB code written. Free vibration analysis was carried out for identifying the natural frequencies. The damping ratios are identified by using the same FFT where it uses half – Power Band Width Method as a source in the system. It is observed that the damping ratio is higher for Kevlar than carbon fibre reinforced composites.