Abstract: Stress-strain behavior test curves of four different volume fraction of N330 carbon black filled natural rubber composites have been obtained by mechanical test. Microstructural features of carbon black filled rubber composite has been gotten through scanning electron microscope observation. Two-dimensional Representative Volume Elements containing multi-particles with different size random distribution have been established, and the macromechanical properties of the carbon black filled rubber composites have been studied and analyzed by the micromechanical nonlinear finite element method. The research shows that the prediction results with 7 percent filler content on the stress-strain behavior are higher than experimental results. The prediction results with 15 and 25 percent filler content are consistent well with the experimental results, until the certain strain are lower gradually than the experimental results. And it demonstrates that the two-dimensional model can be used for simulation analysis of stress-strain behavior of the carbon black filler particle reinforced rubber matrix composites.

Key words: rubber composites, carbon black filler particle, finite element analysis, representative volume element