Abstract
In recent years, bio composites have experienced significant growth and have found applications in various sectors, like domestic use, aerospace, circuit boards, and automotive industries. Extensive research has been conducted on natural fibres to develop it as composite materials so that can compete with synthetic fibre composites. Jute and sisal fibres with Polylactic acid (PLA) means fully biodegradable and recyclable, offer an environmentally friendly solution. The fabrication of the bio-composite specimen involved the utilization of a hot press moulding machine. The maximum strength and bending properties, including ductility, were assessed through flexural and tensile tests following ASTM standards. Free vibration analysis was conducted to determine important characteristics like damping frequency, damping ratio, and natural frequency of the bio composites. The resonant set obtained for Sisal/PLA is inferior to Jute/PLA composites, which clearly demonstrates the influence of fibre in resonant behaviour of the composites. Further Sisal/PLA composites show 20% rise in damping performance at first two resonant sets and 30% in the third resonant. This free vibration characterization of most widely used to composites provides valuable insights into the practical usage under suitable environment conditions.
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