Damping efficiency of the coating structure

The damping efficiency of the coating system was discussed in this paper based on the Reuss model and Hashin-shtrickman equation. The theoretical results show that for a coating system, there exist an optimum thickness of the coating layer that make the coating structure obtain the best balance between the strength and the damping capacity. Enlarge the modulus difference between the coating layer and substrate will improve the damping and stiffness of the coating system simultaneously. The deviation between the theoretical predicted and experimental values on the dynamic modulus and damping capacity will be ameliorated while the stiffness difference between the coating layer and substrate increasing.