Abstract
For the purpose of investigating effects and benefits of multilayered and higher-order-deformable modeling for free vibration and damping predictions of laminated and sandwich composites, four different kinds of lamination models, i.e. ESL/FOSD, ESL/HOD, ML/FOSD, and ML/HOD, were developed and assessed from the points of view of numerical accuracy. In this study, as a numerical solution method, finite element method (FEM) was used. A numerical example in the case of CFRP/aluminum-honeycomb sandwich cantilever beams with or without visco-elastic inserts clearly showed the best performance of ML/FOSD model. ESL/FOSD model, on the other hand, gave some stiff and poor results, which suspects that it suffered from the so-called shear locking. However, ESL/HOD model did not show any shear locking, therefore this ESL/HOD model can be one of the remedies against such locking phenomena in the numerical analysis of composite laminates.
