Abstract
The paper presents a theoretical-experimental approach of a particular class of composite materials known as multiphase composites in order to retrieve its effective elastic coefficients and identify the major influencing factors on these variations. Moreover, in the paper is being presented a particular homogenization concept based on the well known theoretical predictions from the micromechanics of composite materials approaches, the Mori-Tanaka that applies to the particle reinforced composites and Halpin-Tsai that applies to the random fibre composites. The theoretical values were used against the experimental data, the later being retrieved during a simple tensile, compression and three point bending tests at room temperature on samples made using a self-developed manufacturing technology. The samples were ceramics and metal reinforced particles of various volume fraction embedded along with random E-glass fibres into a polyester matrix. Keywords: composite, multi-phase, elastic coefficient, micromechanics, testing