Finite element micromechanical modeling the damping behaviors of PMMCs at room temperature

The performance of PMMCs is often controlled by the properties of the particulate/matrix interface. How the interface of particulate/matrix takes effect on the mechanical properties of PMMCs is a very interesting topic for the materials scientists. In the present paper, the effects of the interface, strain amplitude and volume fraction of the particulate on the overall damping capacity of the PMMCs at the room temperature have been investigated. According to the difference of the adhesion strength of the interface, four kinds of interfaces which are free sliding interface, sliding with friction interface, bonded interface and ideal interface, have been considered. The results show that the condition of particulate/matrix interface of the PMMCs greatly affects the damping behavior of the composite. That is, the composite with strong interface of high adhesion strength has lower damping capacity than that with weak interface. All the damping capacities increase with the strain amplitude exponentially for different volume fraction and interface conditions, and the damping capacity of the whole composite increases with the volume fraction of the particulate in the volume fraction range involved in the paper.