Dynamic properties of composite panel sandwiched by a perforated fiber reinforced damping film

Composite panel sandwiched by a perforated fiber reinforced damping film (CPSPFRDF) is a novel damping treatment structure. Compared with conventional damping sandwich composites, CPSPFRDF has higher stiffness under the large damping. A ring deformation model is proposed to characterize the misalignment of fibers. A multi-scale mathematical model is established by means of the analytical method of cell structure. The equivalent elastic parameters of the perforated fiber reinforced damping film are obtained. The complex stiffness method is applied to build the dynamic model of the structure. The validity of the theoretical model is verified by experiments. The relationships of design parameters with the dynamic properties of CPSPFRDF are revealed further. This study will provide a reference for the design and manufacture of the composites with large damping and high stiffness.

Automated summary

The CPSPFRDF structure is a novel damping treatment with higher stiffness and better performance under large damping. The study establishes a mathematical model and verifies it experimentally, revealing the relationships between design parameters and dynamic properties.