Numerical Simulation On The Properties Of SIC Foam/al Co-continuous Composites

Co-continuous composites whose components are three-dimensional continuous are a novel function materials. It has more better performance in preservation their respective advantages of high hard reinforcement and high tough matrix. At the same time, its novel structure can improve the combined properties, such as mechanical properties, thermal physical properties, wear resistance and earthquake resistant performance. So it becomes possible to be used as wear resistant materials, vibration-absorptive materials, high temperature resistant material and electronics packaging materials. After this kind of composite is further developed and applied, the great economic and social benefits will be attained later on.3D-body central cubic, Kelvin and Gibson-Ashby model were used to calculate the behavior of foam. And the precision of the simulated results were evaluated in this paper. Kelvin model as the structure of reinforcement was the final choice, it is closest to the bonding structures of foam. A reasonable mesh generating method was proposed, the finite element model of SiC foam/Al co-continuous composites had been established by the ANSYS software, and numerical simulation of thermal and mechanical properties of composites was achieved, the effect factors such as volume fraction, degree of roughening of SiC surface, compression speed on the prediction of performance are investigated systematically. The results indicate that the magnitude and distribution of the stress of co-continuous composites is relevant to its special structure; compared with the conventional particles reinforced metal matrix composites, co-continuous composites show higher bearing capacity; the proportion of component is one of the key factors which affect strength of composites; coarsening of SiC surface makes materials have different compressive and bending strength and the deviated flow rules of metal. High compression speed can aggravate destruction of co-continuous composites; the variation in the thermal physical parameter and material structure between reinforcement and matrix has affected the thermal conduction behavior and the thermal stress distribution.Numerical simulation technique can be used in material science research, the experimental data are good agreement with the simulated results, which shows the materials simulation can be regarded as a reference in the practical engineering problems.