Comparative investigation on nonlinear transient vibrations of laminated composite shallow shell with active constrained layer damping treatment using PFRC and AFC patch material

Here, the comparative investigation for the performance of active constrained layer damping treatment using PFRC and AFC patch material for controlling the nonlinear transient vibrations of laminated composite shallow shell is carried out. The patch material used in this case for making the constraining layer of the ACLD treatment is PFRC and AFC. For modelling of ACLD in the time domain Golla-Hughes-McTavish (GHM) method is used. The Von Kármán type non-linear strain displacement relations along with a simple first-order shear deformation theory are used for deriving this electromechanical coupled problem. A finite model in 3-dimensions have been developed for smart composite shallow shell integrated with the ACLD treated patches of PFRC and AFC. The results of both the cases have been compared and it has been found that the improved performance of AFC patch over the PFRC in subsiding the transient nonlinear vibrations of symmetric cross ply laminated composite shallow shell. (paper)