Dynamic effective equivalent stiffness analysis on the periodical honeycomb reinforced composite laminated structure filled with viscoelastic damping material

In the present study, the composite laminated plate (CLP) with a honeycomb reinforcement core layer is established, the dynamic effective equivalent stiffness (DEES) of the CLP is obtained by using the homogenous asymptotic method (HAM). In order to improve the elastic wave energy dissipation and absorption properties of the laminated plate, the vacant place of the core (honeycomb reinforcement layer) is filled with viscoelastic damping material (VDM). As the VDM's physical parameters are frequency- and temperature-dependent, the dynamic properties of the composite structure are analyzed in frequency- and temperature-fields. The effects of geometry parameters including height, width and inner angle of the honeycomb reinforcements on the frequency- and temperature-dependent dynamic properties of the CLP are studied in detail. Results show that by choosing a proper thickness of the aluminum reinforcement and the honeycomb's inner angle, the equivalent stiffness of the composite laminate can reach to 3 to 10 times of the base material's stiffness. Finally, the results obtained through HAM are verified by using the finite element method (FEM).