Specific damping capacity calculation of composite plates with delamination based on higher-order Zig-Zag theory

Abstract

Damping is focused in a mass of engineering applications at present. In this paper a new laminate element rests on the higher-order zigzag theory for composite plates were presented. And then, viscoelasticity damping and frictional damping models in delaminated composites were established. The damping changes of delaminated composites with different boundary conditions were investigated via the laminate element, the effects of area and location on damping were also researched. The results revealed that viscoelasticity damping and frictional damping are in the same order of magnitude even delamination area is small, and frictional damping increase significantly when delamination area enlarged, frictional damping is needed to be considered in the damping research of delaminated composites.