Damping Characteristic of Composite Material with Periodic Micro-Tetrahedron Structures

Research on damping characteristic of structures and materials is always one of the studies of international grand issue. Here, we addressed the damping characteristic of composite material with periodic micro-tetrahedron structures. We established two computational models: one is a composite material model with periodic micro-tetrahedron structure, and another is the mass point model with periodic micro tetrahedron structures. The unit cell of the first model is the micro-tetrahedron structure, in which the six edges are made of steel, and all the other areas are filled with a kind of high damping material such as rubber. In order to improve the damping characteristic of the first model, we transform the first model into the second model by applying a centralized mass to the center of every parallelepiped, which consist of six micro-tetrahedron structures. By analyzing and comparing the damping characteristic of the two models, it can be concluded that the damping characteristic of the mass point model is better, and properly choosing the weight of the centralized mass can improve the damping characteristic of the structure.