In this study, damping characteristics of viscoelastic sandwich cylindrical shell under internal/external pressure and internal temperature are investigated. By implementing finite difference method for irregular grids in the sandwich cylinder, the temperature distribution at each layer is determined. A non-linear model for displacement fields at the viscoelastic core layer is developed to describe the damping characteristics of sandwich cylinder with thin/thick core layer. The effect of dissipation in a pressurized cylinder under harmonic variation of the pressure is also investigated. As shown, deflection increases with time due to the dissipated energy and consequently loss factor is not unique even at a constant frequency.
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