In this paper, SiCp/Al composites for delegates, both the experimental and numerical approaches were applied to investigate the particle size effects of the particle reinforced metal matrix composites from the point of view of macro- and meso- mechanics. In the present experiment, the SiCp/Al composites containing 20% volume fraction of SiC particles were fabricated by a powder metallurgy technique. The particles and the reinforced matrix were selected to be polycrystallineα-SiC particles with the ave...