Numerical Analysis on Mechanical Behavior of Viscoelastic Nano Composite

The automotive industry is constantly racing towards reduction of CO2 emissions. Electric vehicle has the potential to be sustainable solution to the problem. As with other vehicles its systems are constantly subjected to vibrations caused by different sources. The vehicle battery pack is one such critical system when subjected to vibration suffers degradation and thus requires vibration isolation. This paper deals with study of vibration isolation properties of viscoelastic materials as a constrained layer to be used in automotive application. The damping layer made with Nitrile Butadiene rubber - Poly Vinyl chloride blend (NBR-PVC 5050) and millable polyurethane are compounded with graphene, organo-montmorillonite (OMMT) clay and carbon black as fillers with variable weight percentages. The study involves investigation of the effect of thickness ratio between damping layer and constraining layer on damping properties of the specimen in free and forced vibration setup.