Investigation on the Damping Characteristics of the Embedded Co-cured Composite Damping Structures

In this paper,IIR rubber was used as the main component of visco-elastic damping material.Then,the damping layer of specimen was made of the damping material by mold molding.With epoxy glass fabric prepreg,according to the cure curves,some specimens of embedded co-cured composite structure were obtained.Finally,the damping characteristics of them were tested.Test results show that by adding a thin damping layer,the damping of structure is increased nearly without being stiffness changed.However,by adding a thick damping layer,the change of stiffness of the component is significant.With increases of the thickness of damping layer,the rate of the increases of damping gradually is reduced.Therefore,it is inappropriated to improve the damping characteristic of the structure by increasing the thickness of the damping layer of the embedded co-cured composite damping structures.