Abstract
The voids in microstructural network of rubber favors the reinforcement of micro and nanosized fillers with a wide range of physical and mechanical properties. This phenomenon of nanofiller reinforcement opens a new horizon for researchers with a tremendous scope to design and investigate nanocomposite materials especially for energy storage, shock absorbing and vibration damping applications. In this study the possibilities of designing a new nanocomposite vibration damper is investigated through the mode of reinforcement of alumina-zirconia (Al2O3-ZrO2) hybrid nanocomposite particles in natural rubber (NR). TEM images of nanoparticles indicate clearly the particle size and reinforcement of ZrO2 in Al2O3 matrix and SEM images of nanocomposite NR shows the surface morphology and entanglement of elastomeric chains. Finite element method is applied to validate the results and it was recorded that the free vibration amplitude decay time is reduced by 25% alongwith excellent 260% enhancement in storage modulus with 15% filler concentration. A sensitivity analysis is carried out for the improvement in storage modulus of nanocomposite rubber as a function of nanofiller concentration.
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