EXPERIMENTAL STUDY OF DYNAMIC BEHAVIOUR OF HYBRID JUTE/SISAL FIBRE REINFORCED POLYESTER COMPOSITES

Abstract

The present study deals with transverse vibration analysis of hybrid jute-sisal fabric reinforced polyester composites. The hybrid jute-sisal laminate are prepared by hand lay-up technique using untreated woven jute and sisal as reinforced materials and commercially available polyester resin as a matrix material. A cantilevered rectangular symmetric plate of hybrid jute-sisal fabric reinforced polyester composite having aspect ratio of 0.83 with 5 layers of cloth for hybrid jute-sisal laminate with fibre direction orientation at [+90°/+45°/0°/-45°/-90°] laminate is prepared. In the analysis, a frequency domain model is used along with Frequency Response Function (FRF) measurements obtained from the plate. These measurements are made using a Fast Fourier Technique (FFT) based spectrum analyzer. Natural frequency, damping factor and mode shapes are obtained from the laminates.