Abstract
In this work,the free vibration and damping response of organically modified montmorillonite (OMMT) nanoclay-reinforced polylactic acid (PLA) nanocomposites are studied experimentally. The specimens in the form of the beam are prepared usingthe fused deposition modeling process,one of the prominent additive manufacturing techniques. The effect of reinforcing nanofillers,i.e.,OMMT nanoclay,on the fundamental natural frequency is investigated by varying its weight percentage (1%,3%, and 5%). Further,a comparative study is made with the natural frequencies of pure PLA beams as well. The experimental setup constituted an accelerometer,impact hammer,and data acquisition unit for vibration studies. LABVIEW program was developed to obtain the frequency response plots. Two different boundary conditions,viz. cantilever and clamped constraints have been incorporated in this investigation. The experimental results reveal that boundary conditions and the percentage of nanofillers play a vital role in deciding the frequency and damping parameters of the PLA/OMMT nanocomposite beam.
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