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- W2886263480 abstract "Modal analysis comprises of determination of natural frequency, mode shapes and damping factor of dynamic structures. It is essential in analyzing the response of a structure in real-life situations to avoid resonance condition under excitation. Now a days, composites with natural fiber/particle materials are in considerable demand for structural applications as an alternative material to conventional synthetic fiber composites. However, adequate amount of work on modal analysis of these composites has not been noticed in the literature. The objective of the present work is to evaluate the influence of coconut shell particle size and its volume fraction on natural frequencies and damping factor of coconut shell particles filled epoxy composites. Coconut shell particles reinforced composites (CSPE) were developed using open mould technique with particle sizes of 0.25, 0.5,1 and 2 mm and particle volume fractions of 40%, 50% and 60%. The experimental set up consists of a composite cantilever beam (270 mm × 40 mm × 12 mm), impact hammer, accelerometer and computer interfaced data acquisition system. Acceleration v/s Time plots were acquired using LAB VIEW virtual instrumentation software and converted into Amplitude v/s Frequency plot by Fast Fourier Transform (FFT) using MAT LAB. The natural frequencies are also predicted theoretically and numerically (using ANSYS). The damping ratio was determined using half power band width method. The results reveal that as the particle size and its volume fraction increases, the natural frequency decreases whereas it is vice versa in case of damping factor. The experimental, theoretical and numerical values of natural frequencies are found to be in good agreement. It is concluded that CSPE composites possesses the damping ratios comparable to conventional composite materials such as glass fiber filled epoxy composites." @default.
- W2886263480 created "2018-08-22" @default.
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- W2886263480 date "2018-01-01" @default.
- W2886263480 modified "2023-10-03" @default.
- W2886263480 title "Evaluation of natural frequencies and damping ratios of coconut shell particles reinforced epoxy composites" @default.
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- W2886263480 doi "https://doi.org/10.1016/j.matpr.2018.05.109" @default.
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